Synchronize with MSYS2

This pulls in the current tip of the `msys2-3.6.1` branch, which
includes a compile fix and a substantial enhancement of the CI builds by
running MSYS2's tests on the built MSYS2 runtime.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/build.yaml

@@ -2,6 +2,9 @@ name: build
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: windows-latest
@@ -34,6 +37,7 @@ jobs:
         with:
           name: install
           path: _dest/
+
   minimal-sdk-artifact:
     runs-on: windows-latest
     needs: [build]
@@ -107,8 +111,65 @@ jobs:
         with:
           name: git-artifacts
           path: git-artifacts.tar.gz
+
   test-minimal-sdk:
     needs: [minimal-sdk-artifact]
     uses: git-for-windows/git-sdk-64/.github/workflows/test-ci-artifacts.yml@main
     with:
       git-artifacts-extract-location: ${{ needs.minimal-sdk-artifact.outputs.git-artifacts-extract-location }}
+
+  generate-msys2-tests-matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.matrix.outputs.matrix }}
+    steps:
+      - id: matrix
+        uses: msys2/msys2-tests/gha-matrix-gen@main
+
+  msys2-tests:
+    needs: [build, generate-msys2-tests-matrix]
+    strategy:
+      fail-fast: false
+      matrix:
+        include: ${{ fromJson(needs.generate-msys2-tests-matrix.outputs.matrix) }}
+
+    name: msys2-tests ${{ matrix.msystem }}-${{ matrix.cc }}
+    runs-on: ${{ matrix.runner }}
+    env:
+      CC: ${{ matrix.cc }}
+      CXX: ${{ matrix.cxx }}
+      FC: ${{ matrix.fc }}
+    steps:
+      - id: msys2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: ${{ matrix.msystem }}
+          update: true
+          install: ${{ matrix.packages }}
+
+      - name: Add staging repo
+        shell: msys2 {0}
+        run: |
+          sed -i '1s|^|[staging]\nServer = https://repo.msys2.org/staging/\nSigLevel = Never\n|' /etc/pacman.conf
+
+      - name: Update using staging
+        shell: pwsh
+        run: |
+          msys2 -c 'pacman --noconfirm -Suuy'
+          $ErrorActionPreference = 'Stop'
+          $PSNativeCommandUseErrorActionPreference = $true
+          msys2 -c 'pacman --noconfirm -Suu'
+
+      - name: Download msys2-runtime artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: install
+          path: ${{ steps.msys2.outputs.msys2-location }}
+
+      - name: uname -a
+        shell: msys2 {0}
+        run: uname -a
+
+      - name: Run tests
+        uses: msys2/msys2-tests@main
+

newlib/libc/include/sys/unistd.h

@@ -215,7 +215,7 @@ int     setpgrp (void);
 #if defined(__CYGWIN__) && __BSD_VISIBLE
 /* Stub for Linux libbsd compatibility. */
 #define initsetproctitle(c, a, e) setproctitle_init((c), (a), (e))
-static inline void setproctitle_init (int _c, char *_a[], char *_e[]) {}
+static __inline void setproctitle_init (int _c, char *_a[], char *_e[]) {}
 
 void setproctitle (const char *, ...)
 		   _ATTRIBUTE ((__format__ (__printf__, 1, 2)));