Fix Windows/debug relocation section size

Author: simonlegrand

.github/workflows/full-msmpi.yml

@@ -48,7 +48,7 @@ jobs:
       fail-fast: false
       matrix:
         version:  ${{ fromJson(inputs.windows_versions || '[2025]') }}
-        build-type: ${{ fromJson(inputs.build-types || '["release"]') }}
+        build-type: ${{ fromJson(inputs.build-types || '["debug", "release"]') }}
 
     name: Windows Server ${{ matrix.version }} ${{ matrix.build-type }} - ${{github.workflow}}
     runs-on: windows-${{ matrix.version }}

.github/workflows/minimal.yml

@@ -97,6 +97,7 @@ jobs:
       fail-fast: false
       matrix:
         cfg:
+        - {opts: --enable-debug}
         - {opts: --enable-optim --enable-generic}
 
     name: Windows Server 2025 with ${{ matrix.cfg.opts }} - ${{ github.workflow }}

.github/workflows/sequential.yml

@@ -98,6 +98,7 @@ jobs:
       fail-fast: false
       matrix:
         cfg:
+        - {opts: --enable-debug}
         - {opts: --enable-optim --enable-generic}
 
     name: Windows Server 2025 with ${{ matrix.cfg.opts }} - ${{github.workflow}}

configure.ac

@@ -617,6 +617,14 @@ CYGWIN*|MINGW*|MSYS_NT*)
 		    CXXFLAGS="$CXXFLAGS -I/usr/include/mingw"
 		    CFLAGS="$CFLAGS -I/usr/include/mingw"
 		    CNOFLAGS="$CNOFLAGS -I/usr/include/mingw"
+		    if test "$enable_debug" = yes;
+		    then
+		        # Increase the COFF relocation section size. Adress
+			# space isn't big enough otherwise.
+			# See: https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#coff-relocations-object-only
+		        CXXFLAGS="$CXXFLAGS -Wa,-mbig-obj"
+		    	CFLAGS="$CFLAGS -Wa,-mbig-obj"
+		    fi
 		fi
 
 		LIBS="$LIBS -mthreads -lws2_32 -lcomdlg32"