diff --git a/c2rust-analyze/src/analyze.rs b/c2rust-analyze/src/analyze.rs
index f0e627b19..0622c5012 100644
--- a/c2rust-analyze/src/analyze.rs
+++ b/c2rust-analyze/src/analyze.rs
@@ -24,8 +24,8 @@ use crate::type_desc::Ownership;
 use crate::util;
 use crate::util::Callee;
 use crate::util::TestAttr;
-use ::log::warn;
 use c2rust_pdg::graph::Graphs;
+use log::{debug, info, warn};
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::CrateNum;
 use rustc_hir::def_id::DefId;
@@ -241,7 +241,7 @@ fn update_pointer_info<'tcx>(acx: &mut AnalysisCtxt<'_, 'tcx>, mir: &Body<'tcx>)
                 _ => continue,
             };
 
-            eprintln!(
+            debug!(
                 "update_pointer_info: visit assignment: {:?}[{}]: {:?}",
                 bb, i, stmt
             );
@@ -249,7 +249,7 @@ fn update_pointer_info<'tcx>(acx: &mut AnalysisCtxt<'_, 'tcx>, mir: &Body<'tcx>)
             if !pl.is_indirect() {
                 // This is a write directly to `pl.local`.
                 *write_count.entry(pl.local).or_insert(0) += 1;
-                eprintln!("  record write to LHS {:?}", pl);
+                debug!("  record write to LHS {:?}", pl);
             }
 
             let ref_pl = match *rv {
@@ -261,7 +261,7 @@ fn update_pointer_info<'tcx>(acx: &mut AnalysisCtxt<'_, 'tcx>, mir: &Body<'tcx>)
                 // For simplicity, we consider taking the address of a local to be a write.  We
                 // expect this not to happen for the sorts of temporary refs we're looking for.
                 if !ref_pl.is_indirect() {
-                    eprintln!("  record write to ref target {:?}", ref_pl);
+                    debug!("  record write to ref target {:?}", ref_pl);
                     *write_count.entry(ref_pl.local).or_insert(0) += 1;
                 }
 
@@ -377,7 +377,7 @@ fn mark_foreign_fixed<'tcx>(
             let fields = adt_def.all_fields();
             for field in fields {
                 let field_lty = gacx.field_ltys[&field.did];
-                eprintln!(
+                debug!(
                     "adding FIXED permission for {adt_did:?} field {:?}",
                     field.did
                 );
@@ -565,9 +565,9 @@ struct FuncInfo<'tcx> {
 }
 
 fn run(tcx: TyCtxt) {
-    eprintln!("all defs:");
+    debug!("all defs:");
     for ldid in tcx.hir_crate_items(()).definitions() {
-        eprintln!("{:?}", ldid);
+        debug!("{:?}", ldid);
     }
 
     // Load the list of fixed defs early, so any errors are reported immediately.
@@ -583,9 +583,9 @@ fn run(tcx: TyCtxt) {
     // Follow a postorder traversal, so that callers are visited after their callees.  This means
     // callee signatures will usually be up to date when we visit the call site.
     let all_fn_ldids = fn_body_owners_postorder(tcx);
-    eprintln!("callgraph traversal order:");
+    debug!("callgraph traversal order:");
     for &ldid in &all_fn_ldids {
-        eprintln!("  {:?}", ldid);
+        debug!("  {:?}", ldid);
     }
 
     populate_field_users(&mut gacx, &all_fn_ldids);
@@ -616,9 +616,9 @@ fn run(tcx: TyCtxt) {
 
     // Collect all `static` items.
     let all_static_dids = all_static_items(tcx);
-    eprintln!("statics:");
+    debug!("statics:");
     for &did in &all_static_dids {
-        eprintln!("  {:?}", did);
+        debug!("  {:?}", did);
     }
 
     // Assign global `PointerId`s for types of `static` items.
@@ -813,7 +813,7 @@ fn run(tcx: TyCtxt) {
     // Remap pointers based on equivalence classes, so all members of an equivalence class now use
     // the same `PointerId`.
     let (global_counter, global_equiv_map) = global_equiv.renumber();
-    eprintln!("global_equiv_map = {global_equiv_map:?}");
+    debug!("global_equiv_map = {global_equiv_map:?}");
     pointee_type::remap_pointers_global(
         &mut global_pointee_types,
         &global_equiv_map,
@@ -828,7 +828,7 @@ fn run(tcx: TyCtxt) {
 
         let info = func_info.get_mut(&ldid).unwrap();
         let (local_counter, local_equiv_map) = info.local_equiv.renumber(&global_equiv_map);
-        eprintln!("local_equiv_map = {local_equiv_map:?}");
+        debug!("local_equiv_map = {local_equiv_map:?}");
         pointee_type::remap_pointers_local(
             &mut global_pointee_types,
             &mut info.local_pointee_types,
@@ -917,7 +917,7 @@ fn run(tcx: TyCtxt) {
     let mut func_def_path_hash_to_ldid = HashMap::new();
     for &ldid in &all_fn_ldids {
         let def_path_hash: (u64, u64) = tcx.def_path_hash(ldid.to_def_id()).0.as_value();
-        eprintln!("def_path_hash {:?} = {:?}", def_path_hash, ldid);
+        debug!("def_path_hash {:?} = {:?}", def_path_hash, ldid);
         func_def_path_hash_to_ldid.insert(def_path_hash, ldid);
     }
 
@@ -961,7 +961,7 @@ fn run(tcx: TyCtxt) {
                 let ptr = match acx.ptr_of(dest) {
                     Some(x) => x,
                     None => {
-                        eprintln!(
+                        warn!(
                             "pdg: {}: local {:?} appears as dest, but has no PointerId",
                             n.function.name, dest
                         );
@@ -973,7 +973,7 @@ fn run(tcx: TyCtxt) {
                 let node_info = match n.info.as_ref() {
                     Some(x) => x,
                     None => {
-                        eprintln!(
+                        warn!(
                             "pdg: {}: node with dest {:?} is missing NodeInfo",
                             n.function.name, dest
                         );
@@ -1005,7 +1005,7 @@ fn run(tcx: TyCtxt) {
                     let added = perms & !old_perms;
                     let removed = old_perms & !perms;
                     let kept = old_perms & perms;
-                    eprintln!(
+                    debug!(
                         "pdg: changed {:?}: added {:?}, removed {:?}, kept {:?}",
                         ptr, added, removed, kept
                     );
@@ -1097,8 +1097,8 @@ fn run(tcx: TyCtxt) {
         &mut g_updates_forbidden,
     );
 
-    eprintln!("=== ADT Metadata ===");
-    eprintln!("{:?}", gacx.adt_metadata);
+    debug!("=== ADT Metadata ===");
+    debug!("{:?}", gacx.adt_metadata);
 
     let mut loop_count = 0;
     loop {
@@ -1164,14 +1164,14 @@ fn run(tcx: TyCtxt) {
                 let added = new & !old;
                 let removed = old & !new;
                 let kept = old & new;
-                eprintln!(
+                debug!(
                     "changed {:?}: added {:?}, removed {:?}, kept {:?}",
                     ptr, added, removed, kept
                 );
                 num_changed += 1;
             }
         }
-        eprintln!(
+        debug!(
             "iteration {}: {} global pointers changed",
             loop_count, num_changed
         );
@@ -1180,7 +1180,7 @@ fn run(tcx: TyCtxt) {
             break;
         }
     }
-    eprintln!("reached fixpoint in {} iterations", loop_count);
+    info!("reached fixpoint in {} iterations", loop_count);
 
     // Do final processing on each function.
     for &ldid in &all_fn_ldids {
@@ -1353,7 +1353,7 @@ fn run2<'tcx>(
         assert!(i < 100);
         func_reports.clear();
         all_rewrites.clear();
-        eprintln!("\n--- start rewriting ---");
+        info!("--- start rewriting ---");
 
         // Update non-rewritten items first.  This has two purposes.  First, it clears the
         // `new_keys()` lists, which we check at the end of the loop to see whether we've reached a
@@ -1485,7 +1485,7 @@ fn run2<'tcx>(
     let mut adt_reports = HashMap::<DefId, String>::new();
     for &def_id in gacx.adt_metadata.table.keys() {
         if gacx.foreign_mentioned_tys.contains(&def_id) {
-            eprintln!("Avoiding rewrite for foreign-mentioned type: {def_id:?}");
+            debug!("Avoiding rewrite for foreign-mentioned type: {def_id:?}");
             continue;
         }
         if fixed_defs.contains(&def_id) {
@@ -1537,7 +1537,7 @@ fn run2<'tcx>(
 
         // Print labeling and rewrites for the current function.
 
-        eprintln!("\nfinal labeling for {:?}:", name);
+        debug!("final labeling for {:?}:", name);
         let lcx1 = crate::labeled_ty::LabeledTyCtxt::new(tcx);
         let lcx2 = crate::labeled_ty::LabeledTyCtxt::new(tcx);
         for (local, decl) in mir.local_decls.iter_enumerated() {
@@ -1552,12 +1552,11 @@ fn run2<'tcx>(
             );
         }
 
-        eprintln!("\ntype assignment for {:?}:", name);
+        debug!("type assignment for {:?}:", name);
         rewrite::dump_rewritten_local_tys(&acx, &asn, pointee_types, &mir, describe_local);
 
-        eprintln!();
         if let Some(report) = func_reports.remove(&ldid) {
-            eprintln!("{}", report);
+            debug!("{}", report);
         }
 
         info.acx_data.set(acx.into_data());
@@ -1610,7 +1609,7 @@ fn run2<'tcx>(
     }
 
     // Print results for `static` items.
-    eprintln!("\nfinal labeling for static items:");
+    debug!("final labeling for static items:");
     let lcx1 = crate::labeled_ty::LabeledTyCtxt::new(tcx);
     let lcx2 = crate::labeled_ty::LabeledTyCtxt::new(tcx);
     let mut static_dids = gacx.static_tys.keys().cloned().collect::<Vec<_>>();
@@ -1628,10 +1627,10 @@ fn run2<'tcx>(
             &gasn.flags,
         );
     }
-    eprintln!("\n{statics_report}");
+    debug!("{statics_report}");
 
     // Print results for ADTs and fields
-    eprintln!("\nfinal labeling for fields:");
+    debug!("final labeling for fields:");
     let mut field_dids = gacx.field_ltys.keys().cloned().collect::<Vec<_>>();
     field_dids.sort();
     for did in field_dids {
@@ -1641,7 +1640,7 @@ fn run2<'tcx>(
         if pid != PointerId::NONE {
             let ty_perms = gasn.perms[pid];
             let ty_flags = gasn.flags[pid];
-            eprintln!("{name:}: ({pid}) perms = {ty_perms:?}, flags = {ty_flags:?}");
+            debug!("{name:}: ({pid}) perms = {ty_perms:?}, flags = {ty_flags:?}");
         }
 
         // Emit annotations for fields
@@ -1676,7 +1675,7 @@ fn run2<'tcx>(
     adt_dids.sort();
     for did in adt_dids {
         if let Some(report) = adt_reports.remove(&did) {
-            eprintln!("\n{}", report);
+            debug!("{}", report);
         }
     }
 
@@ -1715,17 +1714,17 @@ fn run2<'tcx>(
     // ----------------------------------
 
     // Report errors that were caught previously
-    eprintln!("\nerror details:");
+    debug!("error details:");
     for ldid in tcx.hir().body_owners() {
         if let Some(detail) = gacx.fns_failed.get(&ldid.to_def_id()) {
             if !detail.has_backtrace() {
                 continue;
             }
-            eprintln!("\nerror in {:?}:\n{}", ldid, detail.to_string_full());
+            debug!("error in {:?}:{}", ldid, detail.to_string_full());
         }
     }
 
-    eprintln!("\nerror summary:");
+    debug!("error summary:");
     fn sorted_def_ids(it: impl IntoIterator<Item = DefId>) -> Vec<DefId> {
         let mut v = it.into_iter().collect::<Vec<_>>();
         v.sort();
@@ -1739,27 +1738,27 @@ fn run2<'tcx>(
             Some(detail) => detail.to_string_short(),
             None => "(no panic)".into(),
         };
-        eprintln!("analysis of {def_id:?} failed: {flags:?}, {detail_str}");
+        debug!("analysis of {def_id:?} failed: {flags:?}, {detail_str}");
     }
 
     for def_id in sorted_def_ids(gacx.dont_rewrite_statics.keys()) {
         let flags = gacx.dont_rewrite_statics.get(def_id);
-        eprintln!("analysis of {def_id:?} failed: {flags:?}");
+        debug!("analysis of {def_id:?} failed: {flags:?}");
     }
 
     for def_id in sorted_def_ids(gacx.dont_rewrite_fields.keys()) {
         let flags = gacx.dont_rewrite_fields.get(def_id);
-        eprintln!("analysis of {def_id:?} failed: {flags:?}");
+        debug!("analysis of {def_id:?} failed: {flags:?}");
     }
 
-    eprintln!(
-        "\nsaw errors in {} / {} functions",
+    info!(
+        "saw errors in {} / {} functions",
         gacx.fns_failed.len(),
         all_fn_ldids.len()
     );
 
     if known_perm_error_fns.len() > 0 {
-        eprintln!(
+        info!(
             "saw permission errors in {} known fns",
             known_perm_error_fns.len()
         );
@@ -1935,7 +1934,7 @@ fn print_labeling_for_var<'tcx>(
             perms[lty.label]
         }
     });
-    eprintln!("{}: addr_of = {:?}, type = {:?}", desc, addr_of1, ty1);
+    debug!("{}: addr_of = {:?}, type = {:?}", desc, addr_of1, ty1);
 
     let addr_of2 = flags[addr_of_ptr];
     let ty2 = lcx2.relabel(lty, &mut |lty| {
@@ -1945,14 +1944,14 @@ fn print_labeling_for_var<'tcx>(
             flags[lty.label]
         }
     });
-    eprintln!(
+    debug!(
         "{}: addr_of flags = {:?}, type flags = {:?}",
         desc, addr_of2, ty2
     );
 
     let addr_of3 = addr_of_ptr;
     let ty3 = lty;
-    eprintln!("{}: addr_of = {:?}, type = {:?}", desc, addr_of3, ty3);
+    debug!("{}: addr_of = {:?}, type = {:?}", desc, addr_of3, ty3);
 }
 
 fn print_function_pointee_types<'tcx>(
@@ -1961,9 +1960,9 @@ fn print_function_pointee_types<'tcx>(
     mir: &Body<'tcx>,
     pointee_types: PointerTable<PointeeTypes<'tcx>>,
 ) {
-    eprintln!("\npointee types for {}", name);
+    debug!("pointee types for {}", name);
     for (local, decl) in mir.local_decls.iter_enumerated() {
-        eprintln!(
+        debug!(
             "{:?} ({}): addr_of = {:?}, type = {:?}",
             local,
             describe_local(acx.tcx(), decl),
@@ -1986,7 +1985,7 @@ fn print_function_pointee_types<'tcx>(
             if tys.ltys.len() == 0 && !tys.incomplete {
                 continue;
             }
-            eprintln!(
+            debug!(
                 "  pointer {:?}: {:?}{}",
                 ptr,
                 tys.ltys,
diff --git a/c2rust-analyze/src/borrowck/def_use.rs b/c2rust-analyze/src/borrowck/def_use.rs
index e92ecceef..395fd33f8 100644
--- a/c2rust-analyze/src/borrowck/def_use.rs
+++ b/c2rust-analyze/src/borrowck/def_use.rs
@@ -1,4 +1,5 @@
 use crate::borrowck::atoms::{AllFacts, AtomMaps, Loan, Path, SubPoint};
+use log::debug;
 use rustc_middle::mir::visit::{
     MutatingUseContext, NonMutatingUseContext, NonUseContext, PlaceContext, Visitor,
 };
@@ -96,7 +97,7 @@ struct DefUseVisitor<'tcx, 'a> {
 impl<'tcx> Visitor<'tcx> for DefUseVisitor<'tcx, '_> {
     fn visit_place(&mut self, place: &Place<'tcx>, context: PlaceContext, location: Location) {
         self.super_place(place, context, location);
-        eprintln!(
+        debug!(
             "visit place {:?} with context {:?} = {:?} at {:?}",
             place,
             context,
@@ -132,7 +133,7 @@ impl<'tcx> Visitor<'tcx> for DefUseVisitor<'tcx, '_> {
     }
 
     fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
-        eprintln!(
+        debug!(
             "visit local {:?} with context {:?} = {:?} at {:?}",
             local,
             context,
@@ -157,7 +158,7 @@ impl<'tcx> Visitor<'tcx> for DefUseVisitor<'tcx, '_> {
 
     fn visit_statement(&mut self, stmt: &Statement<'tcx>, location: Location) {
         self.super_statement(stmt, location);
-        eprintln!("visit stmt {:?} at {:?}", stmt, location);
+        debug!("visit stmt {:?} at {:?}", stmt, location);
 
         if let StatementKind::StorageDead(local) = stmt.kind {
             // Observed: `StorageDead` emits `path_moved_at_base` at the `Mid` point.
@@ -194,7 +195,7 @@ impl<'tcx> LoanInvalidatedAtVisitor<'tcx, '_> {
         context: PlaceContext,
         location: Location,
     ) {
-        eprintln!(
+        debug!(
             "access loan {:?} (kind {:?}) at location {:?} (context {:?} = {:?})",
             loan,
             borrow_kind,
@@ -223,7 +224,7 @@ impl<'tcx> LoanInvalidatedAtVisitor<'tcx, '_> {
 impl<'tcx> Visitor<'tcx> for LoanInvalidatedAtVisitor<'tcx, '_> {
     fn visit_place(&mut self, place: &Place<'tcx>, context: PlaceContext, location: Location) {
         //self.super_place(place, context, location);
-        eprintln!(
+        debug!(
             "loan_invalidated_at: visit place {:?} with context {:?} = {:?} at {:?}",
             place,
             context,
@@ -260,7 +261,7 @@ impl<'tcx> Visitor<'tcx> for LoanInvalidatedAtVisitor<'tcx, '_> {
     }
 
     fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
-        eprintln!(
+        debug!(
             "loan_invalidated_at: visit local {:?} with context {:?} = {:?} at {:?}",
             local,
             context,
diff --git a/c2rust-analyze/src/borrowck/mod.rs b/c2rust-analyze/src/borrowck/mod.rs
index 19fa1b621..972686a04 100644
--- a/c2rust-analyze/src/borrowck/mod.rs
+++ b/c2rust-analyze/src/borrowck/mod.rs
@@ -7,6 +7,7 @@ use crate::labeled_ty::{LabeledTy, LabeledTyCtxt};
 use crate::pointer_id::{PointerTable, PointerTableMut};
 use crate::util::{describe_rvalue, RvalueDesc};
 use indexmap::{IndexMap, IndexSet};
+use log::{debug, info, warn};
 use rustc_hir::def_id::DefId;
 use rustc_middle::mir::{Body, LocalKind, Place, StatementKind, START_BLOCK};
 use rustc_middle::ty::{
@@ -127,9 +128,9 @@ pub fn borrowck_mir<'tcx>(
 ) {
     let mut i = 0;
     loop {
-        eprintln!("run polonius");
+        info!("run polonius");
         let (facts, maps, output) = run_polonius(acx, hypothesis, name, mir, &field_ltys);
-        eprintln!(
+        info!(
             "polonius: iteration {}: {} errors, {} move_errors",
             i,
             output.errors.len(),
@@ -172,7 +173,7 @@ pub fn borrowck_mir<'tcx>(
                     },
                     _ => panic!("loan {:?} was issued by non-assign stmt {:?}?", loan, stmt),
                 };
-                eprintln!("want to drop UNIQUE from pointer {:?}", ptr);
+                debug!("want to drop UNIQUE from pointer {:?}", ptr);
 
                 if hypothesis[ptr].contains(PermissionSet::UNIQUE) {
                     hypothesis[ptr].remove(PermissionSet::UNIQUE);
@@ -181,12 +182,12 @@ pub fn borrowck_mir<'tcx>(
             }
         }
 
-        eprintln!("propagate");
+        info!("propagate");
         changed |= dataflow.propagate(hypothesis, updates_forbidden);
-        eprintln!("done propagating");
+        info!("done propagating");
 
         if !changed {
-            eprintln!(
+            warn!(
                 "{} unresolved borrowck errors in function {:?} (after {} iterations)",
                 output.errors.len(),
                 name,
@@ -256,10 +257,10 @@ fn run_polonius<'tcx>(
 
     // Populate `cfg_edge`
     for (bb, bb_data) in mir.basic_blocks().iter_enumerated() {
-        eprintln!("{:?}:", bb);
+        debug!("{:?}:", bb);
 
         for idx in 0..bb_data.statements.len() {
-            eprintln!("  {}: {:?}", idx, bb_data.statements[idx]);
+            debug!("  {}: {:?}", idx, bb_data.statements[idx]);
             let start = maps.point(bb, idx, SubPoint::Start);
             let mid = maps.point(bb, idx, SubPoint::Mid);
             let next_start = maps.point(bb, idx + 1, SubPoint::Start);
@@ -268,7 +269,7 @@ fn run_polonius<'tcx>(
         }
 
         let term_idx = bb_data.statements.len();
-        eprintln!("  {}: {:?}", term_idx, bb_data.terminator());
+        debug!("  {}: {:?}", term_idx, bb_data.terminator());
         let term_start = maps.point(bb, term_idx, SubPoint::Start);
         let term_mid = maps.point(bb, term_idx, SubPoint::Mid);
         facts.cfg_edge.push((term_start, term_mid));
@@ -361,7 +362,7 @@ fn run_polonius<'tcx>(
 
     dump::dump_facts_to_dir(&facts, &maps, format!("inspect/{}", name)).unwrap();
 
-    eprintln!("running polonius analysis on {name}");
+    info!("running polonius analysis on {name}");
     let facts_hash = bytes_to_hex_string(&hash_facts(&facts));
     let output = match try_load_cached_output(&facts_hash) {
         Some(output) => output,
@@ -387,7 +388,7 @@ fn try_load_cached_output(facts_hash: &str) -> Option<Output> {
     let raw = match bincode::deserialize_from(f) {
         Ok(x) => x,
         Err(e) => {
-            log::warn!("failed to parse polonius cache file {path:?}: {e}");
+            warn!("failed to parse polonius cache file {path:?}: {e}");
             return None;
         }
     };
@@ -419,7 +420,7 @@ fn try_load_cached_output(facts_hash: &str) -> Option<Output> {
         ),
     ) = raw;
 
-    eprintln!("loaded cached facts from {}", path);
+    info!("loaded cached facts from {}", path);
 
     Some(Output {
         errors,
@@ -576,7 +577,7 @@ fn construct_adt_origins<'tcx>(
     ty: &Ty,
     amaps: &mut AtomMaps,
 ) -> &'tcx [(OriginParam, Origin)] {
-    eprintln!("ty: {ty:?}");
+    debug!("ty: {ty:?}");
     let adt_def = ty.ty_adt_def().unwrap();
 
     // create a concrete origin for each actual or hypothetical
@@ -588,7 +589,7 @@ fn construct_adt_origins<'tcx>(
         .map_or(&default, |adt| &adt.lifetime_params)
         .iter()
         .map(|origin| (*origin, amaps.origin()))
-        .inspect(|pairing| eprintln!("pairing lifetime parameter with origin: {pairing:?}"));
+        .inspect(|pairing| log::debug!("pairing lifetime parameter with origin: {pairing:?}"));
     ltcx.arena().alloc_from_iter(origins)
 }
 
diff --git a/c2rust-analyze/src/borrowck/type_check.rs b/c2rust-analyze/src/borrowck/type_check.rs
index ce3086a37..bf35b401a 100644
--- a/c2rust-analyze/src/borrowck/type_check.rs
+++ b/c2rust-analyze/src/borrowck/type_check.rs
@@ -7,6 +7,7 @@ use crate::pointer_id::PointerTableMut;
 use crate::util::{self, ty_callee, Callee};
 use assert_matches::assert_matches;
 use indexmap::IndexMap;
+use log::debug;
 use rustc_hir::def_id::DefId;
 use rustc_index::vec::IndexVec;
 use rustc_middle::mir::{
@@ -66,7 +67,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                                 OriginParam::try_from(&oa).unwrap()
                             })
                             .and_then(|o| {
-                                eprintln!(
+                                debug!(
                                     "finding {o:?} in {base_adt_def:?} {base_origin_param_map:?}"
                                 );
                                 base_origin_param_map.get(&o)
@@ -107,7 +108,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                             `'0`) and `Foo` lifetime parameter `'a`. This mapping is created below.
                         */
                         let mut field_origin_param_map = vec![];
-                        eprintln!("{:?}", fadt_def.did());
+                        debug!("{:?}", fadt_def.did());
                         let field_adt_metadata = if let Some(field_adt_metadata) = self.acx.gacx.adt_metadata.table.get(&fadt_def.did()) {
                             field_adt_metadata
                         } else {
@@ -127,7 +128,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                             field_lifetime_param.and_then(|field_lifetime_param| {
                                 base_origin_param_map.get_key_value(&field_lifetime_param)
                             }).map(|(base_lifetime_param, og)| {
-                                eprintln!(
+                                debug!(
                                     "mapping {base_adt_def:?} lifetime parameter {base_lifetime_param:?} to \
                                     {base_adt_def:?}.{:} struct definition lifetime parameter {field_struct_lifetime_param:?}, \
                                     corresponding to its lifetime parameter {field_lifetime_param:?} within {base_adt_def:?}",
@@ -160,7 +161,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
         for proj in pl.projection {
             lty = util::lty_project(lty, &proj, &mut |lty, adt, f| self.field_lty(lty, adt, f));
         }
-        eprintln!("final label for {pl:?}: {:?}", lty);
+        debug!("final label for {pl:?}: {:?}", lty);
         lty
     }
 
@@ -188,19 +189,19 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                                 };
                                 if let Some(origin) = l.label.origin {
                                     // constrain this origin to be 'static
-                                    eprintln!("constraining origin {origin:?} to 'static lifetime");
+                                    debug!("constraining origin {origin:?} to 'static lifetime");
                                     add_subset_base(static_origin, origin);
                                     add_subset_base(origin, static_origin)
                                 }
                                 for (op, origin) in l.label.origin_params {
                                     // constrain this origin to be 'static
-                                    eprintln!("constraining origin {op:?} ({origin:?}) to 'static lifetime");
+                                    debug!("constraining origin {op:?} ({origin:?}) to 'static lifetime");
                                     add_subset_base(static_origin, *origin);
                                     add_subset_base(*origin, static_origin);
                                 }
                             }
 
-                            eprintln!("NEW STATIC LTY: {:?}", c.ty().kind());
+                            debug!("NEW STATIC LTY: {:?}", c.ty().kind());
                             let pointer_id = self.acx.type_of(op).label;
                             let perm = self.hypothesis[pointer_id];
                             let args = self.ltcx.mk_slice(&[lty]);
@@ -240,7 +241,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
             .push((path, loan, borrow_kind));
         let point = self.current_point(SubPoint::Mid);
         self.facts.loan_issued_at.push((origin, loan, point));
-        eprintln!("issued loan {:?} = {:?} ({:?})", loan, pl, borrow_kind);
+        debug!("issued loan {:?} = {:?} ({:?})", loan, pl, borrow_kind);
         origin
     }
 
@@ -447,11 +448,11 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                     for (fid, op) in ops.iter().enumerate() {
                         let field_lty = self.field_lty(expect_ty, adt_def, Field::from(fid));
                         let op_lty = self.visit_operand(op);
-                        eprintln!("pseudo-assigning fields {field_lty:?} = {op_lty:?}");
+                        debug!("pseudo-assigning fields {field_lty:?} = {op_lty:?}");
                         self.do_assign(field_lty, op_lty);
                     }
 
-                    eprintln!("Aggregate literal label: {expect_ty:?}");
+                    debug!("Aggregate literal label: {expect_ty:?}");
                     expect_ty
                 }
                 _ => panic!("unsupported rvalue AggregateKind {:?}", kind),
@@ -478,7 +479,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     }
 
     fn do_assign(&mut self, pl_lty: LTy<'tcx>, rv_lty: LTy<'tcx>) {
-        eprintln!("assign {:?} = {:?}", pl_lty, rv_lty);
+        debug!("assign {:?} = {:?}", pl_lty, rv_lty);
 
         match (pl_lty.ty.kind(), rv_lty.ty.kind()) {
             // exempt pointer casts such as `PointerCast::MutToConstPointer`
@@ -529,7 +530,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     }
 
     pub fn visit_terminator(&mut self, term: &Terminator<'tcx>) {
-        eprintln!("borrowck: visit_terminator({:?})", term.kind);
+        debug!("borrowck: visit_terminator({:?})", term.kind);
         let _g = panic_detail::set_current_span(term.source_info.span);
         // TODO(spernsteiner): other `TerminatorKind`s will be handled in the future
         #[allow(clippy::single_match)]
@@ -543,7 +544,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
             } => {
                 let func_ty = func.ty(self.local_decls, *self.ltcx);
                 let callee = ty_callee(*self.ltcx, func_ty);
-                eprintln!("callee = {callee:?}");
+                debug!("callee = {callee:?}");
                 match callee {
                     Callee::Trivial => {}
                     Callee::UnknownDef { .. } => {
diff --git a/c2rust-analyze/src/context.rs b/c2rust-analyze/src/context.rs
index fbfc05750..f24155788 100644
--- a/c2rust-analyze/src/context.rs
+++ b/c2rust-analyze/src/context.rs
@@ -614,10 +614,10 @@ fn construct_adt_metadata<'tcx>(
                 .table
                 .insert(adt_def.did(), AdtMetadata::default());
             let metadata = adt_metadata_table.table.get_mut(&adt_def.did()).unwrap();
-            eprintln!("gathering known lifetimes for {adt_def:?}");
+            debug!("gathering known lifetimes for {adt_def:?}");
             for sub in substs.iter() {
                 if let GenericArgKind::Lifetime(r) = sub.unpack() {
-                    eprintln!("\tfound lifetime {r:?} in {adt_def:?}");
+                    debug!("found lifetime {r:?} in {adt_def:?}");
                     assert_matches!(r.kind(), ReEarlyBound(eb) => {
                         metadata.lifetime_params.insert(OriginParam::Actual(eb));
                     });
@@ -649,26 +649,26 @@ fn construct_adt_metadata<'tcx>(
         loop_count += 1;
         assert!(loop_count < 1000);
 
-        eprintln!("---- running fixed point struct field analysis iteration #{loop_count:?} ----");
+        info!("---- running fixed point struct field analysis iteration #{loop_count:?} ----");
         let old_adt_metadata = adt_metadata_table.table.clone();
         let mut next_hypo_origin_id = 0;
 
         // for each struct, gather lifetime information (actual and hypothetical)
         for struct_did in &adt_metadata_table.struct_dids {
             let adt_def = tcx.adt_def(struct_did);
-            eprintln!("gathering lifetimes and lifetime parameters for {adt_def:?}");
+            debug!("gathering lifetimes and lifetime parameters for {adt_def:?}");
             for field in adt_def.all_fields() {
                 let field_lty = field_ltys
                     .get(&field.did)
                     .unwrap_or_else(|| panic!("missing field_ltys entry for {:?}", field.did));
-                eprintln!("\t{adt_def:?}.{:}", field.name);
+                debug!("{adt_def:?}.{:}", field.name);
                 let field_origin_args = ltcx.relabel(field_lty, &mut |lty| {
                     let mut field_origin_args = IndexSet::new();
                     match lty.kind() {
                         TyKind::RawPtr(ty) => {
                             if needs_region(lty) {
-                                eprintln!(
-                                    "\t\tfound pointer that requires hypothetical lifetime: *{:}",
+                                debug!(
+                                    "found pointer that requires hypothetical lifetime: *{:}",
                                     if let Mutability::Mut = ty.mutbl {
                                         "mut"
                                     } else {
@@ -682,8 +682,8 @@ fn construct_adt_metadata<'tcx>(
                                         let origin_arg = OriginArg::Hypothetical(next_hypo_origin_id);
                                         let origin_param =
                                             OriginParam::Hypothetical(next_hypo_origin_id);
-                                        eprintln!(
-                                            "\t\t\tinserting origin {origin_param:?} into {adt_def:?}"
+                                        debug!(
+                                            "inserting origin {origin_param:?} into {adt_def:?}"
                                         );
 
                                         adt.lifetime_params.insert(origin_param);
@@ -693,7 +693,7 @@ fn construct_adt_metadata<'tcx>(
                             }
                         }
                         TyKind::Ref(reg, _ty, _mutability) => {
-                            eprintln!("\t\tfound reference field lifetime: {reg:}");
+                            debug!("found reference field lifetime: {reg:}");
                             assert_matches!(reg.kind(), ReEarlyBound(..) | ReStatic);
                             let origin_arg = OriginArg::Actual(*reg);
                             adt_metadata_table
@@ -701,7 +701,7 @@ fn construct_adt_metadata<'tcx>(
                                 .entry(*struct_did)
                                 .and_modify(|adt| {
                                     if let ReEarlyBound(eb) = reg.kind() {
-                                        eprintln!("\t\t\tinserting origin {eb:?} into {adt_def:?}");
+                                        debug!("inserting origin {eb:?} into {adt_def:?}");
                                         adt.lifetime_params.insert(OriginParam::Actual(eb));
                                     }
 
@@ -709,11 +709,11 @@ fn construct_adt_metadata<'tcx>(
                                 });
                         }
                         TyKind::Adt(adt_field, substs) => {
-                            eprintln!("\t\tfound ADT field base type: {adt_field:?}");
+                            debug!("found ADT field base type: {adt_field:?}");
                             for sub in substs.iter() {
                                 if let GenericArgKind::Lifetime(r) = sub.unpack() {
-                                    eprintln!("\tfound field lifetime {r:?} in {adt_def:?}.{adt_field:?}");
-                                    eprintln!("\t\t\tinserting {adt_field:?} lifetime param {r:?} into {adt_def:?}.{:} lifetime parameters", field.name);
+                                    debug!("found field lifetime {r:?} in {adt_def:?}.{adt_field:?}");
+                                    debug!("inserting {adt_field:?} lifetime param {r:?} into {adt_def:?}.{:} lifetime parameters", field.name);
                                     assert_matches!(r.kind(), ReEarlyBound(..) | ReStatic);
                                     field_origin_args.insert(OriginArg::Actual(r));
                                 }
@@ -724,7 +724,7 @@ fn construct_adt_metadata<'tcx>(
                                 for adt_field_lifetime_param in adt_field_metadata.lifetime_params.iter() {
                                     adt_metadata_table.table.entry(*struct_did).and_modify(|adt| {
                                         if let OriginParam::Hypothetical(h) = adt_field_lifetime_param {
-                                            eprintln!("\t\t\tbubbling {adt_field:?} origin {adt_field_lifetime_param:?} up into {adt_def:?} origins");
+                                            debug!("bubbling {adt_field:?} origin {adt_field_lifetime_param:?} up into {adt_def:?} origins");
                                             field_origin_args.insert(OriginArg::Hypothetical(*h));
                                             adt.lifetime_params.insert(*adt_field_lifetime_param);
                                         }
@@ -755,11 +755,10 @@ fn construct_adt_metadata<'tcx>(
                     });
             }
 
-            eprintln!();
         }
 
         if adt_metadata_table.table == old_adt_metadata {
-            eprintln!("reached a fixed point in struct lifetime reconciliation\n");
+            info!("reached a fixed point in struct lifetime reconciliation\n");
             break;
         }
     }
@@ -1101,7 +1100,7 @@ impl<'a, 'tcx> AnalysisCtxt<'a, 'tcx> {
                 let (pointee_lty, proj, ptr) = match desc {
                     RvalueDesc::Project { base, proj } => {
                         let base_lty = self.type_of(base);
-                        eprintln!(
+                        debug!(
                             "rvalue = {:?}, desc = {:?}, base_lty = {:?}",
                             rv, desc, base_lty
                         );
@@ -1175,7 +1174,7 @@ impl<'a, 'tcx> AnalysisCtxt<'a, 'tcx> {
         let projection_lty = |_lty: LTy, adt_def: AdtDef, field: Field| {
             let field_def = &adt_def.non_enum_variant().fields[field.index()];
             let field_def_name = field_def.name;
-            eprintln!("projecting into {adt_def:?}.{field_def_name:}");
+            debug!("projecting into {adt_def:?}.{field_def_name:}");
             let field_lty: LTy = self.gacx.field_ltys.get(&field_def.did).unwrap_or_else(|| {
                 panic!("Could not find {adt_def:?}.{field_def_name:?} in field type map")
             });
diff --git a/c2rust-analyze/src/dataflow/mod.rs b/c2rust-analyze/src/dataflow/mod.rs
index 5a74ab2ce..7a7af7ef0 100644
--- a/c2rust-analyze/src/dataflow/mod.rs
+++ b/c2rust-analyze/src/dataflow/mod.rs
@@ -4,6 +4,7 @@ use crate::context::{AnalysisCtxt, Assignment, FlagSet, PermissionSet, PointerId
 use crate::pointee_type::PointeeTypes;
 use crate::pointer_id::{OwnedPointerTable, PointerTable, PointerTableMut};
 use crate::recent_writes::RecentWrites;
+use log::debug;
 use rustc_middle::mir::Body;
 
 mod type_check;
@@ -53,14 +54,14 @@ impl DataflowConstraints {
         hypothesis: &mut PointerTableMut<PermissionSet>,
         updates_forbidden: &PointerTable<PermissionSet>,
     ) -> bool {
-        eprintln!("=== propagating ===");
-        eprintln!("constraints:");
+        debug!("=== propagating ===");
+        debug!("constraints:");
         for c in &self.constraints {
-            eprintln!("  {:?}", c);
+            debug!("  {:?}", c);
         }
-        eprintln!("hypothesis:");
+        debug!("hypothesis:");
         for (id, p) in hypothesis.iter() {
-            eprintln!("  {}: {:?}", id, p);
+            debug!("  {}: {:?}", id, p);
         }
 
         struct PropagatePerms;
diff --git a/c2rust-analyze/src/dataflow/type_check.rs b/c2rust-analyze/src/dataflow/type_check.rs
index 4bd7e3707..fdbb15d61 100644
--- a/c2rust-analyze/src/dataflow/type_check.rs
+++ b/c2rust-analyze/src/dataflow/type_check.rs
@@ -10,6 +10,7 @@ use crate::util::{
 };
 use assert_matches::assert_matches;
 use either::Either;
+use log::{debug, error};
 use rustc_hir::def_id::DefId;
 use rustc_middle::mir::{
     AggregateKind, BinOp, Body, CastKind, Location, Mutability, Operand, Place, PlaceRef,
@@ -68,7 +69,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     }
 
     fn record_access(&mut self, ptr: PointerId, mutbl: Mutability) {
-        eprintln!("record_access({:?}, {:?})", ptr, mutbl);
+        debug!("record_access({:?}, {:?})", ptr, mutbl);
         if ptr == PointerId::NONE {
             return;
         }
@@ -174,7 +175,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
 
     pub fn visit_rvalue(&mut self, rv: &Rvalue<'tcx>, rvalue_lty: LTy<'tcx>) {
         let rv_desc = describe_rvalue(rv);
-        eprintln!("visit_rvalue({rv:?}), desc = {rv_desc:?}");
+        debug!("visit_rvalue({rv:?}), desc = {rv_desc:?}");
 
         if let Some(desc) = rv_desc {
             match desc {
@@ -363,7 +364,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
             self.acx.tcx().erase_regions(lty2.ty)
         );
         for (sub_lty1, sub_lty2) in lty1.iter().zip(lty2.iter()) {
-            eprintln!("equate {:?} = {:?}", sub_lty1, sub_lty2);
+            debug!("equate {:?} = {:?}", sub_lty1, sub_lty2);
             if sub_lty1.label != PointerId::NONE || sub_lty2.label != PointerId::NONE {
                 assert!(sub_lty1.label != PointerId::NONE);
                 assert!(sub_lty2.label != PointerId::NONE);
@@ -373,7 +374,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     }
 
     pub fn visit_statement(&mut self, stmt: &Statement<'tcx>, loc: Location) {
-        eprintln!("visit_statement({:?})", stmt);
+        debug!("visit_statement({:?})", stmt);
 
         let _g = panic_detail::set_current_span(stmt.source_info.span);
 
@@ -405,7 +406,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     }
 
     pub fn visit_terminator(&mut self, term: &Terminator<'tcx>, loc: Location) {
-        eprintln!("visit_terminator({:?})", term.kind);
+        debug!("visit_terminator({:?})", term.kind);
         let tcx = self.acx.tcx();
         let _g = panic_detail::set_current_span(term.source_info.span);
         // TODO(spernsteiner): other `TerminatorKind`s will be handled in the future
@@ -435,7 +436,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     ) {
         let tcx = self.acx.tcx();
         let callee = ty_callee(tcx, func);
-        eprintln!("callee = {callee:?}");
+        debug!("callee = {callee:?}");
         match callee {
             Callee::Trivial => {}
             Callee::LocalDef { def_id, substs } => {
@@ -451,7 +452,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                 self.visit_local_call(def_id, substs, args, destination);
             }
             Callee::UnknownDef(_) => {
-                log::error!("TODO: visit Callee::{callee:?}");
+                error!("TODO: visit Callee::{callee:?}");
             }
             Callee::PtrOffset { .. } => {
                 // We handle this like a pointer assignment.
@@ -542,7 +543,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                         maybe_offset_perm = PermissionSet::empty();
                     }
                 }
-                eprintln!("memcpy at {:?} needs offset? {:?}", loc, maybe_offset_perm);
+                debug!("memcpy at {:?} needs offset? {:?}", loc, maybe_offset_perm);
 
                 // input needs WRITE permission
                 let perms = PermissionSet::WRITE | maybe_offset_perm;
@@ -586,7 +587,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                         maybe_offset_perm = PermissionSet::empty();
                     }
                 }
-                eprintln!("memset at {:?} needs offset? {:?}", loc, maybe_offset_perm);
+                debug!("memset at {:?} needs offset? {:?}", loc, maybe_offset_perm);
 
                 let perms = PermissionSet::WRITE | maybe_offset_perm;
                 self.constraints.add_all_perms(rv_lty.label, perms);
diff --git a/c2rust-analyze/src/main.rs b/c2rust-analyze/src/main.rs
index 3f751031c..13c9e9fac 100644
--- a/c2rust-analyze/src/main.rs
+++ b/c2rust-analyze/src/main.rs
@@ -216,7 +216,7 @@ impl Cargo {
         f(&mut cmd)?;
         let status = cmd.status()?;
         if !status.success() {
-            eprintln!("error ({status}) running: {cmd:?}");
+            ::log::error!("error ({status}) running: {cmd:?}");
             exit_with_status(status);
         }
         Ok(())
diff --git a/c2rust-analyze/src/pointee_type/type_check.rs b/c2rust-analyze/src/pointee_type/type_check.rs
index b0f7f60fd..24ca3d1d1 100644
--- a/c2rust-analyze/src/pointee_type/type_check.rs
+++ b/c2rust-analyze/src/pointee_type/type_check.rs
@@ -219,7 +219,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
     pub fn visit_call(&mut self, func: Ty<'tcx>, args: &[Operand<'tcx>], dest_lty: LTy<'tcx>) {
         let tcx = self.acx.tcx();
         let callee = ty_callee(tcx, func);
-        eprintln!("callee = {callee:?}");
+        debug!("callee = {callee:?}");
         match callee {
             Callee::Trivial => {}
             Callee::LocalDef { def_id, substs } => {
@@ -253,7 +253,7 @@ impl<'tcx> TypeChecker<'tcx, '_> {
                 // include information about expected/required pointee types
             }
             Callee::UnknownDef(_) => {
-                log::error!("TODO: visit Callee::{callee:?}");
+                error!("TODO: visit Callee::{callee:?}");
             }
 
             Callee::PtrOffset { .. } => {
diff --git a/c2rust-analyze/src/rewrite/apply.rs b/c2rust-analyze/src/rewrite/apply.rs
index bd9d9d4ad..07f8ac281 100644
--- a/c2rust-analyze/src/rewrite/apply.rs
+++ b/c2rust-analyze/src/rewrite/apply.rs
@@ -1,4 +1,5 @@
 use crate::rewrite::Rewrite;
+use log::warn;
 use rustc_hir::Mutability;
 use rustc_span::source_map::{FileName, SourceMap};
 use rustc_span::{BytePos, SourceFile, Span, SyntaxContext};
@@ -643,7 +644,7 @@ pub fn apply_rewrites(
 ) -> HashMap<FileName, FileRewrite> {
     let (rts, errs) = RewriteTree::build(rws);
     for (span, rw, err) in errs {
-        eprintln!(
+        warn!(
             "{:?}: warning: failed to apply rewrite {:?}: {:?}",
             span, rw, err
         );
diff --git a/c2rust-analyze/src/rewrite/expr/convert.rs b/c2rust-analyze/src/rewrite/expr/convert.rs
index 164af12cc..1870e43ba 100644
--- a/c2rust-analyze/src/rewrite/expr/convert.rs
+++ b/c2rust-analyze/src/rewrite/expr/convert.rs
@@ -108,7 +108,7 @@ impl<'tcx> ConvertVisitor<'tcx> {
         if let Some(child_span_rw) = self.rewrites.get(&sub_ex.hir_id) {
             let child_rw = &child_span_rw.1;
             if let Some(subst_rw) = child_rw.try_subst(&rw_sub) {
-                eprintln!(
+                debug!(
                     "get_subexpr: substituted {rw_sub:?} into {child_rw:?}, producing {subst_rw:?}"
                 );
                 self.subsumed_child_rewrites
@@ -299,7 +299,7 @@ impl<'tcx> Visitor<'tcx> for ConvertVisitor<'tcx> {
                 let adj_rws =
                     take_prefix_while(&mut mir_rws, |x| x.desc == MirOriginDesc::Adjustment(i));
                 for mir_rw in adj_rws {
-                    eprintln!("would apply {mir_rw:?} for adjustment #{i}, over {hir_rw:?}");
+                    debug!("would apply {mir_rw:?} for adjustment #{i}, over {hir_rw:?}");
                     hir_rw = rewrite_from_mir_rws(&mir_rw.rw, hir_rw);
                 }
                 hir_rw
@@ -316,7 +316,7 @@ impl<'tcx> Visitor<'tcx> for ConvertVisitor<'tcx> {
         }
 
         if !matches!(hir_rw, Rewrite::Identity) {
-            eprintln!(
+            debug!(
                 "rewrite {:?} at {:?} (materialize? {})",
                 hir_rw, callsite_span, self.materialize_adjustments
             );
@@ -423,7 +423,7 @@ fn generate_zeroize_code(zero_ty: &ZeroizeType, lv: &str) -> String {
             generate_zeroize_code(elem_zero_ty, "(*elem)")
         ),
         ZeroizeType::Struct(ref fields) => {
-            eprintln!("zeroize: {} fields on {lv}: {fields:?}", fields.len());
+            debug!("zeroize: {} fields on {lv}: {fields:?}", fields.len());
             let mut s = String::new();
             write!(s, "{{\n").unwrap();
             for (name, field_zero_ty) in fields {
diff --git a/c2rust-analyze/src/rewrite/expr/hir_only_casts.rs b/c2rust-analyze/src/rewrite/expr/hir_only_casts.rs
index df8a127e7..6d213905a 100644
--- a/c2rust-analyze/src/rewrite/expr/hir_only_casts.rs
+++ b/c2rust-analyze/src/rewrite/expr/hir_only_casts.rs
@@ -10,6 +10,7 @@
 //! path starts with rewrites on MIR and lifts them up to the HIR level.
 
 use crate::rewrite::Rewrite;
+use log::debug;
 use rustc_hir as hir;
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_middle::hir::nested_filter;
@@ -88,7 +89,7 @@ where
     fn visit_expr(&mut self, ex: &'tcx hir::Expr<'tcx>) {
         // Check for the syntactic pattern of a two-part address-of.
         if let Some((ref_expr, mutbl)) = match_two_part_address_of(ex) {
-            eprintln!(
+            debug!(
                 "found two-part address-of pattern at {:?}, {:?}, {:?}",
                 ex.span, ref_expr.span, mutbl
             );
@@ -96,14 +97,14 @@ where
             if self.expr_has_address_of_adjustments(ref_expr, mutbl) {
                 if (self.filter)(ref_expr) {
                     // Emit a rewrite to remove the cast, leaving only the inner `&x`.
-                    eprintln!("  emit rewrite for expr at {:?}", ref_expr.span);
+                    debug!("  emit rewrite for expr at {:?}", ref_expr.span);
                     self.rewrites
                         .push((ex.span, Rewrite::Sub(0, ref_expr.span)));
                 } else {
-                    eprintln!("  filter rejected expr at {:?}", ref_expr.span);
+                    debug!("  filter rejected expr at {:?}", ref_expr.span);
                 }
             } else {
-                eprintln!("  missing adjustments for expr at {:?}", ref_expr.span);
+                debug!("  missing adjustments for expr at {:?}", ref_expr.span);
             }
         }
 
diff --git a/c2rust-analyze/src/rewrite/expr/mir_op.rs b/c2rust-analyze/src/rewrite/expr/mir_op.rs
index e5b391752..8176fa93f 100644
--- a/c2rust-analyze/src/rewrite/expr/mir_op.rs
+++ b/c2rust-analyze/src/rewrite/expr/mir_op.rs
@@ -13,6 +13,7 @@ use crate::pointee_type::PointeeTypes;
 use crate::pointer_id::{PointerId, PointerTable};
 use crate::type_desc::{self, Ownership, Quantity, TypeDesc};
 use crate::util::{ty_callee, Callee};
+use log::debug;
 use rustc_ast::Mutability;
 use rustc_middle::mir::{
     BasicBlock, Body, Location, Operand, Place, Rvalue, Statement, StatementKind, Terminator,
@@ -221,7 +222,7 @@ impl<'a, 'tcx> ExprRewriteVisitor<'a, 'tcx> {
 
     fn visit_statement(&mut self, stmt: &Statement<'tcx>, loc: Location) {
         let _g = panic_detail::set_current_span(stmt.source_info.span);
-        eprintln!(
+        debug!(
             "mir_op::visit_statement: {:?} @ {:?}: {:?}",
             loc, stmt.source_info.span, stmt
         );
@@ -476,7 +477,7 @@ impl<'a, 'tcx> ExprRewriteVisitor<'a, 'tcx> {
     /// Visit an `Rvalue`.  If `expect_ty` is `Some`, also emit whatever casts are necessary to
     /// make the `Rvalue` produce a value of type `expect_ty`.
     fn visit_rvalue(&mut self, rv: &Rvalue<'tcx>, expect_ty: Option<LTy<'tcx>>) {
-        eprintln!("mir_op::visit_rvalue: {:?}, expect {:?}", rv, expect_ty);
+        debug!("mir_op::visit_rvalue: {:?}, expect {:?}", rv, expect_ty);
         match *rv {
             Rvalue::Use(ref op) => {
                 self.enter_rvalue_operand(0, |v| v.visit_operand(op, expect_ty));
@@ -537,7 +538,7 @@ impl<'a, 'tcx> ExprRewriteVisitor<'a, 'tcx> {
                             self.perms[rv_lty.label],
                             self.flags[rv_lty.label],
                         );
-                        eprintln!("Cast with common pointee {:?}:\n  op_desc = {:?}\n  rv_desc = {:?}\n  matches? {}",
+                        debug!("Cast with common pointee {:?}:\n  op_desc = {:?}\n  rv_desc = {:?}\n  matches? {}",
                             pointee_lty, op_desc, rv_desc, op_desc == rv_desc);
                         if op_desc == rv_desc {
                             // After rewriting, the input and output types of the cast will be
diff --git a/c2rust-analyze/src/rewrite/expr/unlower.rs b/c2rust-analyze/src/rewrite/expr/unlower.rs
index 20cc29370..39a12a2e3 100644
--- a/c2rust-analyze/src/rewrite/expr/unlower.rs
+++ b/c2rust-analyze/src/rewrite/expr/unlower.rs
@@ -237,7 +237,7 @@ impl<'a, 'tcx> UnlowerVisitor<'a, 'tcx> {
                     Some(x @ (pl, _)) if is_var(pl) => x,
                     _ => {
                         warn("expected final Assign to store into var");
-                        eprintln!(
+                        debug!(
                             "visit_expr_inner: bail out: expr at {:?} isn't assigned to a var",
                             ex.span
                         );
@@ -713,7 +713,7 @@ fn is_temp_var(mir: &Body, pl: mir::PlaceRef) -> bool {
 }
 
 fn build_span_index(mir: &Body<'_>) -> SpanIndex<Location> {
-    eprintln!("building span index for {:?}:", mir.source);
+    debug!("building span index for {:?}:", mir.source);
     let mut span_index_items = Vec::new();
     for (bb, bb_data) in mir.basic_blocks().iter_enumerated() {
         for (i, stmt) in bb_data.statements.iter().enumerate() {
@@ -721,7 +721,7 @@ fn build_span_index(mir: &Body<'_>) -> SpanIndex<Location> {
                 block: bb,
                 statement_index: i,
             };
-            eprintln!("  {:?}: {:?}", loc, stmt.source_info.span);
+            debug!("  {:?}: {:?}", loc, stmt.source_info.span);
             span_index_items.push((stmt.source_info.span, loc));
         }
 
@@ -729,7 +729,7 @@ fn build_span_index(mir: &Body<'_>) -> SpanIndex<Location> {
             block: bb,
             statement_index: bb_data.statements.len(),
         };
-        eprintln!("  {:?}: {:?}", loc, bb_data.terminator().source_info.span);
+        debug!("  {:?}: {:?}", loc, bb_data.terminator().source_info.span);
         span_index_items.push((bb_data.terminator().source_info.span, loc));
     }
 
@@ -841,23 +841,23 @@ fn debug_print_unlower_map<'tcx>(
     mir: &Body<'tcx>,
     unlower_map: &BTreeMap<PreciseLoc, MirOrigin>,
 ) {
-    eprintln!("unlowering for {:?}:", mir.source);
+    debug!("unlowering for {:?}:", mir.source);
     for (bb_id, bb) in mir.basic_blocks().iter_enumerated() {
-        eprintln!("  block {bb_id:?}:");
+        debug!("  block {bb_id:?}:");
         for (i, stmt) in bb.statements.iter().enumerate() {
             let loc = Location {
                 block: bb_id,
                 statement_index: i,
             };
 
-            eprintln!("    {loc:?}: {stmt:?}");
+            debug!("    {loc:?}: {stmt:?}");
             for (k, v) in unlower_map.range(&PreciseLoc { loc, sub: vec![] }..) {
                 if k.loc != loc {
                     break;
                 }
                 let sublocs = &k.sub;
                 let ex = tcx.hir().expect_expr(v.hir_id);
-                eprintln!("      {sublocs:?}: {:?}, {:?}", v.desc, ex.span);
+                debug!("      {sublocs:?}: {:?}, {:?}", v.desc, ex.span);
             }
         }
 
@@ -868,14 +868,14 @@ fn debug_print_unlower_map<'tcx>(
                 statement_index: bb.statements.len(),
             };
 
-            eprintln!("    {loc:?}: {term:?}");
+            debug!("    {loc:?}: {term:?}");
             for (k, v) in unlower_map.range(&PreciseLoc { loc, sub: vec![] }..) {
                 if k.loc != loc {
                     break;
                 }
                 let sublocs = &k.sub;
                 let ex = tcx.hir().expect_expr(v.hir_id);
-                eprintln!("      {sublocs:?}: {:?}, {:?}", v.desc, ex.span);
+                debug!("      {sublocs:?}: {:?}, {:?}", v.desc, ex.span);
             }
         }
     }
diff --git a/c2rust-analyze/src/rewrite/mod.rs b/c2rust-analyze/src/rewrite/mod.rs
index affebe42e..8db85ebfd 100644
--- a/c2rust-analyze/src/rewrite/mod.rs
+++ b/c2rust-analyze/src/rewrite/mod.rs
@@ -23,6 +23,7 @@
 //! require us to update the `Span`s mentioned in the later rewrites to account for the changes in
 //! the source code produced by the earlier ones).
 
+use log::{debug, info, warn};
 use rustc_hir::Mutability;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::{FileName, Span};
@@ -323,18 +324,18 @@ pub fn apply_rewrites(
     update_files: UpdateFiles,
 ) {
     let emit = |filename, src: String| {
-        println!("\n\n ===== BEGIN {:?} =====", filename);
+        info!("\n\n ===== BEGIN {:?} =====", filename);
         for line in src.lines() {
             // Omit filecheck directives from the debug output, as filecheck can get confused due
             // to directives matching themselves (e.g. `// CHECK: foo` will match the `foo` in the
             // line `// CHECK: foo`).
             if let Some((pre, _post)) = line.split_once("// CHECK") {
-                println!("{}// (FileCheck directive omitted)", pre);
+                info!("{}// (FileCheck directive omitted)", pre);
             } else {
-                println!("{}", line);
+                info!("{}", line);
             }
         }
-        println!(" ===== END {:?} =====", filename);
+        info!(" ===== END {:?} =====", filename);
 
         if !matches!(update_files, UpdateFiles::No) {
             let mut path_ok = false;
@@ -346,7 +347,7 @@ pub fn apply_rewrites(
                         UpdateFiles::AlongsidePointwise(ref s) => {
                             let ext = format!("{}.rs", s);
                             let p = path.with_extension(&ext);
-                            eprintln!("writing to {:?}", p);
+                            debug!("writing to {:?}", p);
                             p
                         }
                         UpdateFiles::No => unreachable!(),
@@ -356,7 +357,7 @@ pub fn apply_rewrites(
                 }
             }
             if !path_ok {
-                log::warn!("couldn't write to non-real file {filename:?}");
+                warn!("couldn't write to non-real file {filename:?}");
             }
         }
     };
diff --git a/c2rust-analyze/src/rewrite/ty.rs b/c2rust-analyze/src/rewrite/ty.rs
index d529ac134..59adf6b62 100644
--- a/c2rust-analyze/src/rewrite/ty.rs
+++ b/c2rust-analyze/src/rewrite/ty.rs
@@ -21,7 +21,7 @@ use crate::type_desc::{self, Ownership, Quantity, TypeDesc};
 use hir::{
     FnRetTy, GenericParamKind, Generics, ItemKind, Path, PathSegment, VariantData, WherePredicate,
 };
-use log::warn;
+use log::{debug, warn};
 use rustc_ast::ast;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Namespace, Res};
@@ -255,9 +255,9 @@ fn deconstruct_hir_ty<'a, 'tcx>(
                 if type_args.len() < substs.types().count() {
                     // this situation occurs when there are hidden type arguments
                     // such as the allocator `std::alloc::Global` type argument in `Vec`
-                    eprintln!("warning: extra MIR type argument for {adt_def:?}:");
+                    debug!("warning: extra MIR type argument for {adt_def:?}:");
                     for mir_arg in substs.types().into_iter().skip(type_args.len()) {
-                        eprintln!("\t{:?}", mir_arg)
+                        debug!("\t{:?}", mir_arg)
                     }
                 } else if type_args.len() != substs.types().count() {
                     panic!("mismatched number of type arguments for {adt_def:?} and {hir_ty:?}")
@@ -278,7 +278,7 @@ fn deconstruct_hir_ty<'a, 'tcx>(
             Some(v)
         }
         (tk, hir_tk) => {
-            eprintln!("deconstruct_hir_ty: {tk:?} -- {hir_tk:?} not supported");
+            debug!("deconstruct_hir_ty: {tk:?} -- {hir_tk:?} not supported");
             None
         }
     }
@@ -887,7 +887,7 @@ pub fn dump_rewritten_local_tys<'tcx>(
             &acx.gacx,
         );
         let ty = mk_rewritten_ty(rw_lcx, rw_lty);
-        eprintln!(
+        debug!(
             "{:?} ({}): {:?}",
             local,
             describe_local(acx.tcx(), decl),
diff --git a/c2rust-analyze/src/trivial.rs b/c2rust-analyze/src/trivial.rs
index 02dc0bd92..c18cf1d86 100644
--- a/c2rust-analyze/src/trivial.rs
+++ b/c2rust-analyze/src/trivial.rs
@@ -1,3 +1,4 @@
+use log::debug;
 use rustc_middle::ty::{self, Binder, EarlyBinder, FnSig, GenSig, Subst, Ty, TyCtxt};
 
 pub trait IsTrivial<'tcx> {
@@ -60,7 +61,7 @@ impl<'tcx> IsTrivial<'tcx> for Ty<'tcx> {
     fn is_trivial(&self, tcx: TyCtxt<'tcx>) -> bool {
         let not_sure_yet = |is_trivial: bool| {
             let kind = self.kind();
-            eprintln!("assuming non-trivial for now as a safe backup (guessed {is_trivial:?}): ty.kind() = {kind:?}, ty = {self:?}");
+            debug!("assuming non-trivial for now as a safe backup (guessed {is_trivial:?}): ty.kind() = {kind:?}, ty = {self:?}");
             false
         };
 
@@ -84,7 +85,7 @@ impl<'tcx> IsTrivial<'tcx> for Ty<'tcx> {
 
             // don't know, as `dyn Trait` could be anything
             ty::Dynamic(trait_ty, _reg) => {
-                eprintln!("unsure how to check `dyn Trait` for accessible pointers, so assuming non-trivial: ty = {self:?}, trait_ty = {trait_ty:?}");
+                debug!("unsure how to check `dyn Trait` for accessible pointers, so assuming non-trivial: ty = {self:?}, trait_ty = {trait_ty:?}");
                 false
             }
 
diff --git a/c2rust-analyze/src/util.rs b/c2rust-analyze/src/util.rs
index 9c6902ecf..5c97405aa 100644
--- a/c2rust-analyze/src/util.rs
+++ b/c2rust-analyze/src/util.rs
@@ -1,5 +1,6 @@
 use crate::labeled_ty::LabeledTy;
 use crate::trivial::IsTrivial;
+use log::debug;
 use rustc_ast::ast::AttrKind;
 use rustc_const_eval::interpret::Scalar;
 use rustc_hir::def::DefKind;
@@ -201,7 +202,7 @@ pub enum Callee<'tcx> {
 pub fn ty_callee<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Callee<'tcx> {
     let is_trivial = || {
         let is_trivial = ty.fn_sig(tcx).is_trivial(tcx);
-        eprintln!("{ty:?} is trivial: {is_trivial}");
+        debug!("{ty:?} is trivial: {is_trivial}");
         is_trivial
     };
 
@@ -390,7 +391,7 @@ fn builtin_callee<'tcx>(tcx: TyCtxt<'tcx>, did: DefId, substs: SubstsRef<'tcx>)
         }
 
         _ => {
-            eprintln!("name: {name:?}");
+            debug!("name: {name:?}");
             None
         }
     }
diff --git a/c2rust-analyze/tests/common/mod.rs b/c2rust-analyze/tests/common/mod.rs
index 599e2e314..aa09445b6 100644
--- a/c2rust-analyze/tests/common/mod.rs
+++ b/c2rust-analyze/tests/common/mod.rs
@@ -1,3 +1,4 @@
+use log::warn;
 use std::{
     collections::HashSet,
     env,
@@ -337,7 +338,7 @@ pub fn check_for_missing_tests_for(main_test_path: impl AsRef<Path>) {
         .collect::<Vec<_>>();
     for test_name in &missing_tests {
         let test_path = rel_test_dir.join(format!("{test_name}.rs"));
-        eprintln!("missing a `#[test] fn {test_name}` for {test_path:?}");
+        warn!("missing a `#[test] fn {test_name}` for {test_path:?}");
     }
     assert!(missing_tests.is_empty(), "see missing tests above");
 }