diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..976eb6c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "submodules/debian-sysroot"]
+	path = submodules/debian-sysroot
+	url = https://github.com/AmanoTeam/debian-sysroot
diff --git a/aarch64-unknown-linux-gnu.sh b/aarch64-unknown-linux-gnu.sh
index f64f76f..5e7fb28 100644
--- a/aarch64-unknown-linux-gnu.sh
+++ b/aarch64-unknown-linux-gnu.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 
 declare packages=(
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/l/linux/linux-libc-dev_3.16.56-1+deb8u1_arm64.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.19-18+deb8u10_arm64.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.19-18+deb8u10_arm64.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/s/systemtap/systemtap-sdt-dev_2.6-0.2_arm64.deb'
+	'https://archive.debian.org/debian/pool/main/l/linux/linux-libc-dev_3.16.56-1+deb8u1_arm64.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.19-18+deb8u10_arm64.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.19-18+deb8u10_arm64.deb'
+	'https://archive.debian.org/debian/pool/main/s/systemtap/systemtap-sdt-dev_2.6-0.2_arm64.deb'
 )
 
 declare extra_configure_flags=''
diff --git a/alpha-unknown-linux-gnu.sh b/alpha-unknown-linux-gnu.sh
index c22780c..fd18d0d 100644
--- a/alpha-unknown-linux-gnu.sh
+++ b/alpha-unknown-linux-gnu.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 
 declare packages=(
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_alpha.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6.1-dev_2.7-18lenny7_alpha.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6.1_2.7-18lenny7_alpha.deb'
+	'https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_alpha.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6.1-dev_2.7-18lenny7_alpha.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6.1_2.7-18lenny7_alpha.deb'
 )
 
 declare extra_configure_flags=''
diff --git a/arm-unknown-linux-gnueabi.sh b/arm-unknown-linux-gnueabi.sh
index f8ce144..713de09 100644
--- a/arm-unknown-linux-gnueabi.sh
+++ b/arm-unknown-linux-gnueabi.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 
 declare packages=(
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_armel.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.7-18lenny7_armel.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.7-18lenny7_armel.deb'
+	'https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_armel.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.7-18lenny7_armel.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.7-18lenny7_armel.deb'
 )
 
 declare extra_configure_flags='--with-arch=armv4t --with-float=soft --disable-libsanitizer'
diff --git a/arm-unknown-linux-gnueabihf.sh b/arm-unknown-linux-gnueabihf.sh
index 5eebd09..3dc2aae 100644
--- a/arm-unknown-linux-gnueabihf.sh
+++ b/arm-unknown-linux-gnueabihf.sh
@@ -1,10 +1,10 @@
 #!/bin/bash
 
 declare packages=(
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian-security/pool/updates/main/l/linux/linux-libc-dev_3.2.102-1_armhf.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian-security/pool/updates/main/e/eglibc/libc6-dev_2.13-38+deb7u12_armhf.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian-security/pool/updates/main/e/eglibc/libc6_2.13-38+deb7u12_armhf.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/s/systemtap/systemtap-sdt-dev_1.7-1+deb7u1_armhf.deb'
+	'https://archive.debian.org/debian-security/pool/updates/main/l/linux/linux-libc-dev_3.2.102-1_armhf.deb'
+	'https://archive.debian.org/debian-security/pool/updates/main/e/eglibc/libc6-dev_2.13-38+deb7u12_armhf.deb'
+	'https://archive.debian.org/debian-security/pool/updates/main/e/eglibc/libc6_2.13-38+deb7u12_armhf.deb'
+	'https://archive.debian.org/debian/pool/main/s/systemtap/systemtap-sdt-dev_1.7-1+deb7u1_armhf.deb'
 )
 
 declare extra_configure_flags='--with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb' 
diff --git a/build.sh b/build.sh
index 4a54a2e..5a711c9 100644
--- a/build.sh
+++ b/build.sh
@@ -133,22 +133,22 @@ make all --jobs
 make install
 
 declare -ra targets=(
-	'ia64-unknown-linux-gnu'
-	'alpha-unknown-linux-gnu'
+	# 'ia64-unknown-linux-gnu'
+	# 'alpha-unknown-linux-gnu'
 	'x86_64-unknown-linux-gnu'
-	'i386-unknown-linux-gnu'
-	'arm-unknown-linux-gnueabi'
-	'arm-unknown-linux-gnueabihf'
-	'hppa-unknown-linux-gnu'
-	'aarch64-unknown-linux-gnu'
-	'mips-unknown-linux-gnu'
-	'mipsel-unknown-linux-gnu'
-	'powerpc-unknown-linux-gnu'
-	's390-unknown-linux-gnu'
-	's390x-unknown-linux-gnu'
-	'sparc-unknown-linux-gnu'
-	'powerpc64le-unknown-linux-gnu'
-	'mips64el-unknown-linux-gnuabi64'
+	# 'i386-unknown-linux-gnu'
+	# 'arm-unknown-linux-gnueabi'
+	# 'arm-unknown-linux-gnueabihf'
+	# 'hppa-unknown-linux-gnu'
+	# 'aarch64-unknown-linux-gnu'
+	# 'mips-unknown-linux-gnu'
+	# 'mipsel-unknown-linux-gnu'
+	# 'powerpc-unknown-linux-gnu'
+	# 's390-unknown-linux-gnu'
+	# 's390x-unknown-linux-gnu'
+	# 'sparc-unknown-linux-gnu'
+	# 'powerpc64le-unknown-linux-gnu'
+	# 'mips64el-unknown-linux-gnuabi64'
 )
 
 for target in "${targets[@]}"; do
@@ -248,7 +248,7 @@ for target in "${targets[@]}"; do
 		--with-static-standard-libraries \
 		--with-bugurl='https://github.com/AmanoTeam/obggcc/issues' \
 		--with-gcc-major-version-only \
-		--with-pkgversion="OBGGCC v0.8-${obggcc_revision}" \
+		--with-pkgversion="OBGGCC v0.9-${obggcc_revision}" \
 		--with-sysroot="${toolchain_directory}/${triple}" \
 		--with-native-system-header-dir='/include' \
 		--enable-__cxa_atexit \
@@ -301,3 +301,31 @@ for target in "${targets[@]}"; do
 	patchelf --add-rpath '$ORIGIN/../../../../lib' "${toolchain_directory}/libexec/gcc/${triple}/"*'/cc1plus'
 	patchelf --add-rpath '$ORIGIN/../../../../lib' "${toolchain_directory}/libexec/gcc/${triple}/"*'/lto1'
 done
+
+declare cc='gcc'
+
+if ! (( is_native )); then
+	cc="${CC}"
+fi
+
+declare -r sysroot_tarball='/tmp/sysroot.tar.xz'
+declare -r executable='/tmp/gcc-wrapper'
+
+while read item; do
+	declare glibc_version="$(jq '.glibc_version' <<< "${item}")"
+	declare triplet="$(jq --raw-output '.triplet' <<< "${item}")"
+	
+	"${cc}" \
+		"${workdir}/tools/gcc-wrapper/filesystem.c" \
+		"${workdir}/tools/gcc-wrapper/main.c" \
+		"${workdir}/tools/gcc-wrapper/path.c" \
+		-Os \
+		-s \
+		-o "${executable}"
+	
+	cp "${executable}" "${toolchain_directory}/bin/${triplet}${glibc_version}-gcc"
+	cp "${executable}" "${toolchain_directory}/bin/${triplet}${glibc_version}-g++"
+	
+	wget --no-verbose "https://github.com/AmanoTeam/debian-sysroot/releases/download/latest/${triplet}${glibc_version}.tar.xz" --output-document="${sysroot_tarball}"
+	tar --directory="${toolchain_directory}" --extract --file="${sysroot_tarball}"
+done <<< "$(jq --compact-output '.[]' "${workdir}/submodules/debian-sysroot/dist.json")"
diff --git a/hppa-unknown-linux-gnu.sh b/hppa-unknown-linux-gnu.sh
index fd7d9cd..d69cfb1 100644
--- a/hppa-unknown-linux-gnu.sh
+++ b/hppa-unknown-linux-gnu.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 
 declare packages=(
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_hppa.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.7-18lenny7_hppa.deb'
-	'https://web.archive.org/web/0if_/https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.7-18lenny7_hppa.deb'
+	'https://archive.debian.org/debian/pool/main/l/linux-2.6/linux-libc-dev_2.6.26-29_hppa.deb'
+	'/https://archive.debian.org/debian/pool/main/g/glibc/libc6-dev_2.7-18lenny7_hppa.deb'
+	'https://archive.debian.org/debian/pool/main/g/glibc/libc6_2.7-18lenny7_hppa.deb'
 )
 
 declare extra_configure_flags='--disable-libsanitizer'
diff --git a/submodules/debian-sysroot b/submodules/debian-sysroot
new file mode 160000
index 0000000..8cd10cc
--- /dev/null
+++ b/submodules/debian-sysroot
@@ -0,0 +1 @@
+Subproject commit 8cd10ccf2efcf9f40742156632272842f79b9898
diff --git a/tools/builtin_symbols.json b/tools/builtin_symbols.json
deleted file mode 100644
index ef680da..0000000
--- a/tools/builtin_symbols.json
+++ /dev/null
@@ -1,1102 +0,0 @@
-[
-	{
-		"name": "acoshf",
-		"header": "math"
-	},
-	{
-		"name": "acoshl",
-		"header": "math"
-	},
-	{
-		"name": "acosh",
-		"header": "math"
-	},
-	{
-		"name": "asinhf",
-		"header": "math"
-	},
-	{
-		"name": "asinhl",
-		"header": "math"
-	},
-	{
-		"name": "asinh",
-		"header": "math"
-	},
-	{
-		"name": "atanhf",
-		"header": "math"
-	},
-	{
-		"name": "atanhl",
-		"header": "math"
-	},
-	{
-		"name": "atanh",
-		"header": "math"
-	},
-	{
-		"name": "cabsf",
-		"header": "complex"
-	},
-	{
-		"name": "cabsl",
-		"header": "complex"
-	},
-	{
-		"name": "cabs",
-		"header": "complex"
-	},
-	{
-		"name": "cacosf",
-		"header": "complex"
-	},
-	{
-		"name": "cacoshf",
-		"header": "complex"
-	},
-	{
-		"name": "cacoshl",
-		"header": "complex"
-	},
-	{
-		"name": "cacosh",
-		"header": "complex"
-	},
-	{
-		"name": "cacosl",
-		"header": "complex"
-	},
-	{
-		"name": "cacos",
-		"header": "complex"
-	},
-	{
-		"name": "cargf",
-		"header": "complex"
-	},
-	{
-		"name": "cargl",
-		"header": "complex"
-	},
-	{
-		"name": "carg",
-		"header": "complex"
-	},
-	{
-		"name": "casinf",
-		"header": "complex"
-	},
-	{
-		"name": "casinhf",
-		"header": "complex"
-	},
-	{
-		"name": "casinhl",
-		"header": "complex"
-	},
-	{
-		"name": "casinh",
-		"header": "complex"
-	},
-	{
-		"name": "casinl",
-		"header": "complex"
-	},
-	{
-		"name": "casin",
-		"header": "complex"
-	},
-	{
-		"name": "catanf",
-		"header": "complex"
-	},
-	{
-		"name": "catanhf",
-		"header": "complex"
-	},
-	{
-		"name": "catanhl",
-		"header": "complex"
-	},
-	{
-		"name": "catanh",
-		"header": "complex"
-	},
-	{
-		"name": "catanl",
-		"header": "complex"
-	},
-	{
-		"name": "catan",
-		"header": "complex"
-	},
-	{
-		"name": "cbrtf",
-		"header": "complex"
-	},
-	{
-		"name": "cbrtl",
-		"header": "complex"
-	},
-	{
-		"name": "cbrt",
-		"header": "complex"
-	},
-	{
-		"name": "ccosf",
-		"header": "complex"
-	},
-	{
-		"name": "ccoshf",
-		"header": "complex"
-	},
-	{
-		"name": "ccoshl",
-		"header": "complex"
-	},
-	{
-		"name": "ccosh",
-		"header": "complex"
-	},
-	{
-		"name": "ccosl",
-		"header": "complex"
-	},
-	{
-		"name": "ccos",
-		"header": "complex"
-	},
-	{
-		"name": "cexpf",
-		"header": "complex"
-	},
-	{
-		"name": "cexpl",
-		"header": "complex"
-	},
-	{
-		"name": "cexp",
-		"header": "complex"
-	},
-	{
-		"name": "cimagf",
-		"header": "complex"
-	},
-	{
-		"name": "cimagl",
-		"header": "complex"
-	},
-	{
-		"name": "cimag",
-		"header": "complex"
-	},
-	{
-		"name": "clogf",
-		"header": "complex"
-	},
-	{
-		"name": "clogl",
-		"header": "complex"
-	},
-	{
-		"name": "clog",
-		"header": "complex"
-	},
-	{
-		"name": "conjf",
-		"header": "complex"
-	},
-	{
-		"name": "conjl",
-		"header": "complex"
-	},
-	{
-		"name": "conj",
-		"header": "complex"
-	},
-	{
-		"name": "copysignf",
-		"header": "math"
-	},
-	{
-		"name": "copysignl",
-		"header": "math"
-	},
-	{
-		"name": "copysign",
-		"header": "math"
-	},
-	{
-		"name": "cpowf",
-		"header": "complex"
-	},
-	{
-		"name": "cpowl",
-		"header": "complex"
-	},
-	{
-		"name": "cpow",
-		"header": "complex"
-	},
-	{
-		"name": "cprojf",
-		"header": "complex"
-	},
-	{
-		"name": "cprojl",
-		"header": "complex"
-	},
-	{
-		"name": "cproj",
-		"header": "complex"
-	},
-	{
-		"name": "crealf",
-		"header": "complex"
-	},
-	{
-		"name": "creall",
-		"header": "complex"
-	},
-	{
-		"name": "creal",
-		"header": "complex"
-	},
-	{
-		"name": "csinf",
-		"header": "complex"
-	},
-	{
-		"name": "csinhf",
-		"header": "complex"
-	},
-	{
-		"name": "csinhl",
-		"header": "complex"
-	},
-	{
-		"name": "csinh",
-		"header": "complex"
-	},
-	{
-		"name": "csinl",
-		"header": "complex"
-	},
-	{
-		"name": "csin",
-		"header": "complex"
-	},
-	{
-		"name": "csqrtf",
-		"header": "complex"
-	},
-	{
-		"name": "csqrtl",
-		"header": "complex"
-	},
-	{
-		"name": "csqrt",
-		"header": "complex"
-	},
-	{
-		"name": "ctanf",
-		"header": "complex"
-	},
-	{
-		"name": "ctanhf",
-		"header": "complex"
-	},
-	{
-		"name": "ctanhl",
-		"header": "complex"
-	},
-	{
-		"name": "ctanh",
-		"header": "complex"
-	},
-	{
-		"name": "ctanl",
-		"header": "complex"
-	},
-	{
-		"name": "ctan",
-		"header": "complex"
-	},
-	{
-		"name": "erfcf",
-		"header": "math"
-	},
-	{
-		"name": "erfcl",
-		"header": "math"
-	},
-	{
-		"name": "erfc",
-		"header": "math"
-	},
-	{
-		"name": "erff",
-		"header": "math"
-	},
-	{
-		"name": "erfl",
-		"header": "math"
-	},
-	{
-		"name": "erf",
-		"header": "math"
-	},
-	{
-		"name": "exp2f",
-		"header": "math"
-	},
-	{
-		"name": "exp2l",
-		"header": "math"
-	},
-	{
-		"name": "exp2",
-		"header": "math"
-	},
-	{
-		"name": "expm1f",
-		"header": "math"
-	},
-	{
-		"name": "expm1l",
-		"header": "math"
-	},
-	{
-		"name": "expm1",
-		"header": "math"
-	},
-	{
-		"name": "fdimf",
-		"header": "math"
-	},
-	{
-		"name": "fdiml",
-		"header": "math"
-	},
-	{
-		"name": "fdim",
-		"header": "math"
-	},
-	{
-		"name": "fmaf",
-		"header": "math"
-	},
-	{
-		"name": "fmal",
-		"header": "math"
-	},
-	{
-		"name": "fmaxf",
-		"header": "math"
-	},
-	{
-		"name": "fmaxl",
-		"header": "math"
-	},
-	{
-		"name": "fmax",
-		"header": "math"
-	},
-	{
-		"name": "fma",
-		"header": "math"
-	},
-	{
-		"name": "fminf",
-		"header": "math"
-	},
-	{
-		"name": "fminl",
-		"header": "math"
-	},
-	{
-		"name": "fmin",
-		"header": "math"
-	},
-	{
-		"name": "hypotf",
-		"header": "math"
-	},
-	{
-		"name": "hypotl",
-		"header": "math"
-	},
-	{
-		"name": "hypot",
-		"header": "math"
-	},
-	{
-		"name": "ilogbf",
-		"header": "math"
-	},
-	{
-		"name": "ilogbl",
-		"header": "math"
-	},
-	{
-		"name": "ilogb",
-		"header": "math"
-	},
-	{
-		"name": "imaxabs",
-		"header": "inttypes"
-	},
-	{
-		"name": "isblank",
-		"header": "ctype"
-	},
-	{
-		"name": "iswblank",
-		"header": "wctype"
-	},
-	{
-		"name": "lgammaf",
-		"header": "math"
-	},
-	{
-		"name": "lgammal",
-		"header": "math"
-	},
-	{
-		"name": "lgamma",
-		"header": "math"
-	},
-	{
-		"name": "llabs",
-		"header": "stdlib"
-	},
-	{
-		"name": "llrintf",
-		"header": "math"
-	},
-	{
-		"name": "llrintl",
-		"header": "math"
-	},
-	{
-		"name": "llrint",
-		"header": "math"
-	},
-	{
-		"name": "llroundf",
-		"header": "math"
-	},
-	{
-		"name": "llroundl",
-		"header": "math"
-	},
-	{
-		"name": "llround",
-		"header": "math"
-	},
-	{
-		"name": "log1pf",
-		"header": "math"
-	},
-	{
-		"name": "log1pl",
-		"header": "math"
-	},
-	{
-		"name": "log1p",
-		"header": "math"
-	},
-	{
-		"name": "log2f",
-		"header": "math"
-	},
-	{
-		"name": "log2l",
-		"header": "math"
-	},
-	{
-		"name": "log2",
-		"header": "math"
-	},
-	{
-		"name": "logbf",
-		"header": "math"
-	},
-	{
-		"name": "logbl",
-		"header": "math"
-	},
-	{
-		"name": "logb",
-		"header": "math"
-	},
-	{
-		"name": "lrintf",
-		"header": "math"
-	},
-	{
-		"name": "lrintl",
-		"header": "math"
-	},
-	{
-		"name": "lrint",
-		"header": "math"
-	},
-	{
-		"name": "lroundf",
-		"header": "math"
-	},
-	{
-		"name": "lroundl",
-		"header": "math"
-	},
-	{
-		"name": "lround",
-		"header": "math"
-	},
-	{
-		"name": "nearbyintf",
-		"header": "math"
-	},
-	{
-		"name": "nearbyintl",
-		"header": "math"
-	},
-	{
-		"name": "nearbyint",
-		"header": "math"
-	},
-	{
-		"name": "nextafterf",
-		"header": "math"
-	},
-	{
-		"name": "nextafterl",
-		"header": "math"
-	},
-	{
-		"name": "nextafter",
-		"header": "math"
-	},
-	{
-		"name": "nexttowardf",
-		"header": "math"
-	},
-	{
-		"name": "nexttowardl",
-		"header": "math"
-	},
-	{
-		"name": "nexttoward",
-		"header": "math"
-	},
-	{
-		"name": "remainderf",
-		"header": "math"
-	},
-	{
-		"name": "remainderl",
-		"header": "math"
-	},
-	{
-		"name": "remainder",
-		"header": "math"
-	},
-	{
-		"name": "remquof",
-		"header": "math"
-	},
-	{
-		"name": "remquol",
-		"header": "math"
-	},
-	{
-		"name": "remquo",
-		"header": "math"
-	},
-	{
-		"name": "rintf",
-		"header": "math"
-	},
-	{
-		"name": "rintl",
-		"header": "math"
-	},
-	{
-		"name": "rint",
-		"header": "math"
-	},
-	{
-		"name": "roundf",
-		"header": "math"
-	},
-	{
-		"name": "roundl",
-		"header": "math"
-	},
-	{
-		"name": "round",
-		"header": "math"
-	},
-	{
-		"name": "scalblnf",
-		"header": "math"
-	},
-	{
-		"name": "scalblnl",
-		"header": "math"
-	},
-	{
-		"name": "scalbln",
-		"header": "math"
-	},
-	{
-		"name": "scalbnf",
-		"header": "math"
-	},
-	{
-		"name": "scalbnl",
-		"header": "math"
-	},
-	{
-		"name": "scalbn",
-		"header": "math"
-	},
-	{
-		"name": "snprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "tgammaf",
-		"header": "math"
-	},
-	{
-		"name": "tgammal",
-		"header": "math"
-	},
-	{
-		"name": "tgamma",
-		"header": "math"
-	},
-	{
-		"name": "truncf",
-		"header": "math"
-	},
-	{
-		"name": "truncl",
-		"header": "math"
-	},
-	{
-		"name": "trunc",
-		"header": "math"
-	},
-	{
-		"name": "vfscanf",
-		"header": "stdio"
-	},
-	{
-		"name": "vscanf",
-		"header": "stdio"
-	},
-	{
-		"name": "vsnprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "vsscanf",
-		"header": "stdio"
-	},
-	{
-		"name": "_Exit",
-		"header": "stdlib"
-	},
-	{
-		"name": "acosf",
-		"header": "math"
-	},
-	{
-		"name": "acosl",
-		"header": "math"
-	},
-	{
-		"name": "asinf",
-		"header": "math"
-	},
-	{
-		"name": "asinl",
-		"header": "math"
-	},
-	{
-		"name": "atan2f",
-		"header": "math"
-	},
-	{
-		"name": "atan2l",
-		"header": "math"
-	},
-	{
-		"name": "atanf",
-		"header": "math"
-	},
-	{
-		"name": "atanl",
-		"header": "math"
-	},
-	{
-		"name": "ceilf",
-		"header": "math"
-	},
-	{
-		"name": "ceill",
-		"header": "math"
-	},
-	{
-		"name": "cosf",
-		"header": "math"
-	},
-	{
-		"name": "coshf",
-		"header": "math"
-	},
-	{
-		"name": "coshl",
-		"header": "math"
-	},
-	{
-		"name": "cosl",
-		"header": "math"
-	},
-	{
-		"name": "expf",
-		"header": "math"
-	},
-	{
-		"name": "expl",
-		"header": "math"
-	},
-	{
-		"name": "fabsf",
-		"header": "math"
-	},
-	{
-		"name": "fabsl",
-		"header": "math"
-	},
-	{
-		"name": "floorf",
-		"header": "math"
-	},
-	{
-		"name": "floorl",
-		"header": "math"
-	},
-	{
-		"name": "fmodf",
-		"header": "math"
-	},
-	{
-		"name": "fmodl",
-		"header": "math"
-	},
-	{
-		"name": "frexpf",
-		"header": "math"
-	},
-	{
-		"name": "frexpl",
-		"header": "math"
-	},
-	{
-		"name": "ldexpf",
-		"header": "math"
-	},
-	{
-		"name": "ldexpl",
-		"header": "math"
-	},
-	{
-		"name": "log10f",
-		"header": "math"
-	},
-	{
-		"name": "log10l",
-		"header": "math"
-	},
-	{
-		"name": "logf",
-		"header": "math"
-	},
-	{
-		"name": "logl",
-		"header": "math"
-	},
-	{
-		"name": "modfl",
-		"header": "math"
-	},
-	{
-		"name": "modff",
-		"header": "math"
-	},
-	{
-		"name": "powf",
-		"header": "math"
-	},
-	{
-		"name": "powl",
-		"header": "math"
-	},
-	{
-		"name": "sinf",
-		"header": "math"
-	},
-	{
-		"name": "sinhf",
-		"header": "math"
-	},
-	{
-		"name": "sinhl",
-		"header": "math"
-	},
-	{
-		"name": "sinl",
-		"header": "math"
-	},
-	{
-		"name": "sqrtf",
-		"header": "math"
-	},
-	{
-		"name": "sqrtl",
-		"header": "math"
-	},
-	{
-		"name": "tanf",
-		"header": "math"
-	},
-	{
-		"name": "tanhf",
-		"header": "math"
-	},
-	{
-		"name": "tanhl",
-		"header": "math"
-	},
-	{
-		"name": "tanl",
-		"header": "math"
-	},
-	{
-		"name": "abs",
-		"header": "stdlib"
-	},
-	{
-		"name": "acos",
-		"header": "math"
-	},
-	{
-		"name": "asin",
-		"header": "math"
-	},
-	{
-		"name": "atan2",
-		"header": "math"
-	},
-	{
-		"name": "atan",
-		"header": "math"
-	},
-	{
-		"name": "ceil",
-		"header": "math"
-	},
-	{
-		"name": "cosh",
-		"header": "math"
-	},
-	{
-		"name": "cos",
-		"header": "math"
-	},
-	{
-		"name": "exp",
-		"header": "math"
-	},
-	{
-		"name": "fabs",
-		"header": "math"
-	},
-	{
-		"name": "floor",
-		"header": "math"
-	},
-	{
-		"name": "fmod",
-		"header": "math"
-	},
-	{
-		"name": "frexp",
-		"header": "math"
-	},
-	{
-		"name": "isalnum",
-		"header": "ctype"
-	},
-	{
-		"name": "isalpha",
-		"header": "ctype"
-	},
-	{
-		"name": "iscntrl",
-		"header": "ctype"
-	},
-	{
-		"name": "isdigit",
-		"header": "ctype"
-	},
-	{
-		"name": "isgraph",
-		"header": "ctype"
-	},
-	{
-		"name": "islower",
-		"header": "ctype"
-	},
-	{
-		"name": "isprint",
-		"header": "ctype"
-	},
-	{
-		"name": "ispunct",
-		"header": "ctype"
-	},
-	{
-		"name": "isspace",
-		"header": "ctype"
-	},
-	{
-		"name": "isupper",
-		"header": "ctype"
-	},
-	{
-		"name": "isxdigit",
-		"header": "ctype"
-	},
-	{
-		"name": "ldexp",
-		"header": "math"
-	},
-	{
-		"name": "log10",
-		"header": "math"
-	},
-	{
-		"name": "log",
-		"header": "math"
-	},
-	{
-		"name": "labs",
-		"header": "stdlib"
-	},
-	{
-		"name": "modf",
-		"header": "math"
-	},
-	{
-		"name": "pow",
-		"header": "math"
-	},
-	{
-		"name": "sinh",
-		"header": "math"
-	},
-	{
-		"name": "sin",
-		"header": "math"
-	},
-	{
-		"name": "sqrt",
-		"header": "math"
-	},
-	{
-		"name": "tanh",
-		"header": "math"
-	},
-	{
-		"name": "tan",
-		"header": "math"
-	},
-	{
-		"name": "calloc",
-		"header": "stdlib"
-	},
-	{
-		"name": "exit",
-		"header": "stdlib"
-	},
-	{
-		"name": "fprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "fputs",
-		"header": "stdio"
-	},
-	{
-		"name": "free",
-		"header": "stdlib"
-	},
-	{
-		"name": "fscanf",
-		"header": "stdio"
-	},
-	{
-		"name": "malloc",
-		"header": "stdlib"
-	},
-	{
-		"name": "printf",
-		"header": "stdio"
-	},
-	{
-		"name": "putchar",
-		"header": "stdio"
-	},
-	{
-		"name": "puts",
-		"header": "stdio"
-	},
-	{
-		"name": "realloc",
-		"header": "stdlib"
-	},
-	{
-		"name": "scanf",
-		"header": "stdio"
-	},
-	{
-		"name": "snprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "sprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "sscanf",
-		"header": "stdio"
-	},
-	{
-		"name": "vfprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "vprintf",
-		"header": "stdio"
-	},
-	{
-		"name": "vsprintf",
-		"header": "stdio"
-	}
-]
\ No newline at end of file
diff --git a/tools/gcc-wrapper/filesystem.c b/tools/gcc-wrapper/filesystem.c
new file mode 100644
index 0000000..7fd943e
--- /dev/null
+++ b/tools/gcc-wrapper/filesystem.c
@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include <limits.h>
+
+#include <unistd.h>
+
+char* get_app_filename(void) {
+	/*
+	Returns the filename of the application's executable.
+	
+	Returns a null pointer on error.
+	*/
+	
+	char* app_filename = malloc(PATH_MAX);
+	
+	if (app_filename == NULL) {
+		return NULL;
+	}
+	
+	if (readlink("/proc/self/exe", app_filename, PATH_MAX) == -1) {
+		free(app_filename);
+		return NULL;
+	}
+
+	return app_filename;
+	
+}
diff --git a/tools/gcc-wrapper/filesystem.h b/tools/gcc-wrapper/filesystem.h
new file mode 100644
index 0000000..0c16add
--- /dev/null
+++ b/tools/gcc-wrapper/filesystem.h
@@ -0,0 +1,6 @@
+#if !defined(FILESYSTEM_H)
+#define FILESYSTEM_H
+
+char* get_app_filename(void);
+
+#endif
diff --git a/tools/gcc-wrapper/main.c b/tools/gcc-wrapper/main.c
new file mode 100644
index 0000000..b5d16bf
--- /dev/null
+++ b/tools/gcc-wrapper/main.c
@@ -0,0 +1,198 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <unistd.h>
+
+#include "filesystem.h"
+#include "path.h"
+#include "pathsep.h"
+
+#define GCC "gcc"
+#define GPLUSPLUS "g++"
+
+int main(int argc, char* argv[], char* envp[]) {
+	
+	int status = EXIT_SUCCESS;
+	size_t size = 0;
+	
+	char** args = NULL;
+	char* arg = NULL;
+	
+	const char* cc = NULL;
+	const char* start = NULL;
+	const char* ptr = NULL;
+	
+	char* executable = NULL;
+	
+	char* sysroot_directory = NULL;
+	char* parent_directory = NULL;
+	
+	char* fname = NULL;
+	char* app_filename = NULL;
+	
+	char* triplet = NULL;
+	char* glibc_version = NULL;
+	
+	app_filename = get_app_filename();
+	
+	if (app_filename == NULL) {
+		fprintf(stderr, "fatal error: could not get app filename\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	fname = basename(app_filename);
+	
+	parent_directory = malloc(strlen(app_filename) + 1);
+	
+	if (parent_directory == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	get_parent_directory(app_filename, parent_directory, 1);
+	
+	ptr = strchr(fname, '\0');
+	cc = ptr - 3;
+	
+	if (!(strcmp(cc, GCC) == 0 || strcmp(cc, GPLUSPLUS) == 0)) {
+		fprintf(stderr, "fatal error: unknown GCC compiler: %s\n", cc);
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	ptr = fname;
+	
+	while (1) {
+		const unsigned char a = *ptr;
+		const unsigned char b = *(ptr + 1);
+		
+		if (isdigit(a) && b == '.') {
+			break;
+		}
+		
+		ptr++;
+	}
+	
+	size = (size_t) (ptr - fname);
+	
+	triplet = malloc(size + 1);
+	
+	if (triplet == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	memcpy(triplet, fname, size);
+	triplet[size] = '\0';
+	
+	start = ptr;
+	
+	while (1) {
+		const unsigned char a = *ptr;
+		
+		if (a == '-') {
+			break;
+		}
+		
+		ptr++;
+	}
+	
+	size = (size_t) (ptr - start);
+	
+	glibc_version = malloc(size + 1);
+	
+	if (glibc_version == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	memcpy(glibc_version, start, size);
+	glibc_version[size] = '\0';
+	
+	executable = malloc(strlen(parent_directory) + strlen(PATHSEP) + strlen(triplet) + 1 + strlen(cc) + 1);
+	
+	if (executable == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	strcpy(executable, parent_directory);
+	strcat(executable, PATHSEP);
+	strcat(executable, triplet);
+	strcat(executable, "-");
+	strcat(executable, cc);
+	
+	get_parent_directory(app_filename, parent_directory, 2);
+	
+	sysroot_directory = malloc(strlen(parent_directory) + strlen(PATHSEP) + strlen(triplet) + strlen(glibc_version) + 1);
+	
+	if (sysroot_directory == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	strcpy(sysroot_directory, parent_directory);
+	strcat(sysroot_directory, PATHSEP);
+	strcat(sysroot_directory, triplet);
+	strcat(sysroot_directory, glibc_version);
+	
+	args = malloc(sizeof(char*) * (argc + 2));
+	
+	if (args == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	arg = malloc(10 + strlen(sysroot_directory) + 1);
+	
+	if (arg == NULL) {
+		fprintf(stderr, "fatal error: could not allocate memory\n");
+		
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	strcpy(arg, "--sysroot=");
+	strcat(arg, sysroot_directory);
+	
+	args[0] = executable;
+	args[1] = arg;
+	
+	memcpy(&args[2], &argv[1], argc * sizeof(*argv));
+	
+	if (execve(executable, args, envp) == -1) {
+		status = EXIT_FAILURE;
+		goto end;
+	}
+	
+	end:;
+	
+	free(triplet);
+	free(glibc_version);
+	free(executable);
+	free(sysroot_directory);
+	free(app_filename);
+	free(args);
+	free(arg);
+	
+	return status;
+	
+}
+
diff --git a/tools/gcc-wrapper/path.c b/tools/gcc-wrapper/path.c
new file mode 100644
index 0000000..ea8ef0a
--- /dev/null
+++ b/tools/gcc-wrapper/path.c
@@ -0,0 +1,93 @@
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "path.h"
+#include "pathsep.h"
+
+static int isabsolute(const char* const path) {
+	
+	const int status = (*path == *PATHSEP);
+	return status;
+	
+}
+
+char* basename(const char* const path) {
+	/*
+	Returns the final component of a path.
+	*/
+	
+	char* last_comp = (char*) path;
+	
+	while (1) {
+		char* slash_at = strchr(last_comp, PATHSEP[0]);
+		
+		if (slash_at == NULL) {
+			break;
+		}
+		
+		last_comp = slash_at + 1;
+	}
+	
+	return last_comp;
+	
+}
+
+size_t get_parent_directory(const char* const source, char* const destination, const size_t maxdepth) {
+	/*
+	Get the parent directory up to the specified "maxdepth" depth of a path.
+	
+	Returns:
+	
+	- If the "destination" parameter is NULL, this will return the required size
+	  for the buffer (not including the null-terminator).
+
+	- If the "destination" parameter is not NULL, this will return the number of
+	  characters written into the buffer (not including the null-terminator).
+	*/
+	
+	size_t index = 0;
+	size_t depth = 1;
+	size_t wsize = 0;
+	
+	if (destination != NULL) {
+		destination[0] = '\0';
+	}
+	
+	for (index = strlen(source) - 1; index-- > 0;) {
+		const char ch = source[index];
+		
+		if (ch == PATHSEP[0] && depth++ == maxdepth) {
+			const size_t size = (size_t) ((source + index) - source);
+			
+			if (destination != NULL) {
+				if (size > 0) {
+					memcpy(destination, source, size);
+					destination[size] = '\0';
+				} else {
+					strcat(destination, PATHSEP);
+				}
+			}
+			
+			wsize += (size > 0) ? size : 1;
+			
+			break;
+		}
+		
+		if (index == 0 && isabsolute(source)) {
+			const size_t size = 1;
+			
+			wsize += size;
+			
+			if (destination != NULL) {
+				memcpy(destination, source, size);
+				destination[size] = '\0';
+			}
+			
+			break;
+		}
+	}
+	
+	return wsize;
+	
+}
diff --git a/tools/gcc-wrapper/path.h b/tools/gcc-wrapper/path.h
new file mode 100644
index 0000000..4ea024d
--- /dev/null
+++ b/tools/gcc-wrapper/path.h
@@ -0,0 +1,7 @@
+#if !defined(PATH_H)
+#define PATH_H
+
+char* basename(const char* const path);
+size_t get_parent_directory(const char* const source, char* const destination, const size_t depth);
+
+#endif
diff --git a/tools/gcc-wrapper/pathsep.h b/tools/gcc-wrapper/pathsep.h
new file mode 100644
index 0000000..8b30bf4
--- /dev/null
+++ b/tools/gcc-wrapper/pathsep.h
@@ -0,0 +1,6 @@
+#if !defined(PATHSEP_H)
+#define PATHSEP_H
+
+static const char PATHSEP[] = "/";
+
+#endif
diff --git a/tools/make_builtins.py b/tools/make_builtins.py
deleted file mode 100644
index 1cb9b33..0000000
--- a/tools/make_builtins.py
+++ /dev/null
@@ -1,131 +0,0 @@
-import json
-import os
-import subprocess
-import tempfile
-import shutil
-
-headers = (
-	"math",
-	"stdio",
-	"complex",
-	"stdlib",
-	"ctype",
-	"wctype",
-	"inttypes"
-)
-
-source = """\
-#include <%s.h>
-
-int main(void) {
-	(void) %s;
-	return 0;
-}
-"""
-
-destination = """\
-/* This file is auto generated. */
-%s
-"""
-
-temporary_file = os.path.join(tempfile.gettempdir(), "main.c")
-
-symbols_file = os.path.join(
-	os.path.dirname(p = __file__),
-	"builtin_symbols.json"
-)
-
-class Builtins:
-	
-	def __init__(self):
-		self.math = []
-		self.stdio = []
-		self.complex = []
-		self.stdlib = []
-		self.ctype = []
-		self.wctype = []
-		self.inttypes = []
-
-content = None
-
-cc = os.getenv(key = "CC")
-c_include_path = os.getenv(key = "C_INCLUDE_PATH")
-
-assert cc is not None
-assert c_include_path is not None
-
-def check_symbols_exists(symbol):
-	
-	(name, header) = (symbol["name"], symbol["header"])
-	
-	text = source % (header, name)
-	
-	with open(file = temporary_file, mode = "w") as file:
-		file.write(text)
-	
-	process = subprocess.run([cc, "-std=c11", "-w", "-fno-builtin", temporary_file, "-o", "%s.o" % temporary_file])
-	
-	return process.returncode == 0
-
-def dump_builtins(builtins, name):
-	
-	s = ""
-	
-	items = getattr(builtins, name)
-	
-	if not items:
-		return None
-	
-	items.sort()
-	
-	for item in items:
-		s += ("\n#if !defined(%s)\n#define %s __builtin_%s\n#endif\n" % (item, item, item))
-	
-	dump = destination % (
-		s
-	)
-	
-	with open(file = "builtin_%s.h" % (name), mode = "w") as file:
-		file.write(dump)
-
-with open(file = symbols_file, mode = "r") as file:
-	content = file.read()
-
-symbols = json.loads(s = content)
-
-builtins = Builtins()
-
-for symbol in symbols:
-	exists = check_symbols_exists(symbol = symbol)
-	
-	if exists:
-		continue
-	
-	(name, header) = (
-		symbol["name"],
-		symbol["header"]
-	)
-	
-	items = getattr(builtins, header)
-	items.append(name)
-
-for name in headers:
-	dump_builtins(builtins = builtins, name = name)
-	
-	src = "builtin_%s.h" % (name)
-	dst = os.path.join(c_include_path, "%s.h" % (name))
-	
-	if not os.path.exists(path = src):
-		continue
-	
-	print("- Modifying '%s'" % (dst))
-	
-	with open(file = dst, mode = "a+") as file:
-		file.write("\n\n#include <%s>" % (src))
-	
-	dst = os.path.join(c_include_path, src)
-	
-	if os.path.exists(path = dst):
-		os.remove(dst)
-	
-	shutil.move(src = src, dst = dst)