Add daily rebase of Cygwin to rebase.yml

.github/scripts/toolchain/patch-cygwin.sh

@@ -50,6 +50,8 @@ echo "::group::Patch Cygwin"
     if [[ "$STAGE" = "1" ]]; then
         patch -p1 -i $PATCH_DIR/0002-after-autogen.patch
     fi
+
+    patch -p1 -i $PATCH_DIR/0003-fix-mingw.patch
 echo "::endgroup::"
 
 echo 'Success!'

.github/workflows/rebase.yml

@@ -28,6 +28,8 @@ env:
   GCC_UPSTREAM_URL: git://gcc.gnu.org/git/gcc.git
   MINGW_REPO: Windows-on-ARM-Experiments/mingw-woarm64
   MINGW_UPSTREAM_URL: https://git.code.sf.net/p/mingw-w64/mingw-w64
+  CYGWIN_REPO: Windows-on-ARM-Experiments/newlib-cygwin
+  CYGWIN_UPSTREAM_URL: https://cygwin.com/git/newlib-cygwin.git
 
   SOURCE_PATH: ${{ github.workspace }}/code
   ORIGIN_BRANCH: ${{ inputs.origin_branch || 'woarm64' }}
@@ -104,6 +106,29 @@ jobs:
         run: |
           ${{ github.workspace }}/.github/scripts/rebase-start.sh ${{ env.MINGW_UPSTREAM_URL }} ${{ env.UPSTREAM_BRANCH }} ${{ env.REBASE_BRANCH }}
 
+  start-cygwin-rebase:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          path: ${{ github.workspace }}
+
+      - name: Checkout Cygwin
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GNU_PUSH_PAT }}
+          repository: ${{ env.CYGWIN_REPO }}
+          ref: ${{ env.ORIGIN_BRANCH }}
+          fetch-depth: 0
+          path: ${{ env.SOURCE_PATH }}/cygwin
+
+      - name: Start Cygwin rebase
+        working-directory: ${{ env.SOURCE_PATH }}/cygwin
+        run: |
+          ${{ github.workspace }}/.github/scripts/rebase-start.sh ${{ env.CYGWIN_UPSTREAM_URL }} ${{ env.UPSTREAM_BRANCH }} ${{ env.REBASE_BRANCH }}
+
   build:
     needs: [start-binutils-rebase, start-gcc-rebase, start-mingw-rebase]
     uses: ./.github/workflows/advanced.yml
@@ -181,6 +206,29 @@ jobs:
         run: |
           ${{ github.workspace }}/.github/scripts/rebase-finish.sh ${{ env.REBASE_BRANCH }} ${{ env.ORIGIN_BRANCH }}
 
+  finish-cygwin-rebase:
+    needs: [build]
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          path: ${{ github.workspace }}
+
+      - name: Checkout Cygwin
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GNU_PUSH_PAT }}
+          repository: ${{ env.CYGWIN_REPO }}
+          ref: ${{ env.ORIGIN_BRANCH }}
+          path: ${{ env.SOURCE_PATH }}/cygwin
+
+      - name: Finish Cygwin rebase
+        working-directory: ${{ env.SOURCE_PATH }}/cygwin
+        run: |
+          ${{ github.workspace }}/.github/scripts/rebase-finish.sh ${{ env.REBASE_BRANCH }} ${{ env.ORIGIN_BRANCH }}
+
   deploy:
     needs: [build]
     runs-on: ubuntu-latest

patches/cygwin/0003-fix-mingw.patch

@@ -0,0 +1,29 @@
+--- a/winsup/cygwin/local_includes/ntdll.h
++++ b/winsup/cygwin/local_includes/ntdll.h
+@@ -489,26 +489,6 @@ typedef struct _FILE_DISPOSITION_INFORMATION_EX	// 64
+   ULONG Flags;
+ } FILE_DISPOSITION_INFORMATION_EX, *PFILE_DISPOSITION_INFORMATION_EX;
+
+-typedef struct _FILE_STAT_INFORMATION		// 68
+-{
+-  LARGE_INTEGER FileId;
+-  LARGE_INTEGER CreationTime;
+-  LARGE_INTEGER LastAccessTime;
+-  LARGE_INTEGER LastWriteTime;
+-  LARGE_INTEGER ChangeTime;
+-  LARGE_INTEGER AllocationSize;
+-  LARGE_INTEGER EndOfFile;
+-  ULONG FileAttributes;
+-  ULONG ReparseTag;
+-  ULONG NumberOfLinks;
+-  ACCESS_MASK EffectiveAccess;
+-} FILE_STAT_INFORMATION, *PFILE_STAT_INFORMATION;
+-
+-typedef struct _FILE_CASE_SENSITIVE_INFORMATION	// 71
+-{
+-  ULONG Flags;
+-} FILE_CASE_SENSITIVE_INFORMATION, *PFILE_CASE_SENSITIVE_INFORMATION;
+-
+ enum {
+   FILE_LINK_REPLACE_IF_EXISTS				= 0x01,
+   FILE_LINK_POSIX_SEMANTICS				= 0x02,