[protobuf] Patch the pkg-config file to use the right flags for static libraries. (#25635)

* Patch the protobuf pkg-config file to work correctly with static libraries: the
PROTOBUF_USE_DLLS macro should only be set for dynamic libraries.

* Bump pkgrel

---------

Co-authored-by: Christoph Reiter <reiter.christoph@gmail.com>

mingw-w64-protobuf/0005-pkgconfig-that-understands-static-libraries.patch

@@ -0,0 +1,20 @@
+diff -u -r a/cmake/protobuf-lite.pc.cmake b/cmake/protobuf-lite.pc.cmake
+--- a/cmake/protobuf-lite.pc.cmake	2025-05-28 18:52:59.000000000 +0200
++++ b/cmake/protobuf-lite.pc.cmake	2025-09-21 19:57:43.318803100 +0200
+@@ -9,4 +9,5 @@
+ Requires: @_protobuf_PC_REQUIRES@
+ Libs: -L${libdir} -lprotobuf-lite @CMAKE_THREAD_LIBS_INIT@
+ Cflags: -I${includedir} @_protobuf_PC_CFLAGS@
++Cflags.private: -UPROTOBUF_USE_DLLS
+ Conflicts: protobuf
+Only in b/cmake: protobuf-lite.pc.cmake~
+diff -u -r a/cmake/protobuf.pc.cmake b/cmake/protobuf.pc.cmake
+--- a/cmake/protobuf.pc.cmake	2025-05-28 18:52:59.000000000 +0200
++++ b/cmake/protobuf.pc.cmake	2025-09-21 19:57:28.771314100 +0200
+@@ -9,4 +9,5 @@
+ Requires: @_protobuf_PC_REQUIRES@
+ Libs: -L${libdir} -lprotobuf@protobuf_LIBRARY_POSTFIX@ @CMAKE_THREAD_LIBS_INIT@
+ Cflags: -I${includedir} @_protobuf_PC_CFLAGS@
++Cflags.private: -UPROTOBUF_USE_DLLS
+ Conflicts: protobuf-lite
+Only in b/cmake: protobuf.pc.cmake~

mingw-w64-protobuf/PKGBUILD

@@ -6,7 +6,7 @@ pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 # Note: make sure to update python-protobuf to match this version
 pkgver=31.1
-pkgrel=1
+pkgrel=2
 pkgdesc="Protocol Buffers - Google's data interchange format (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -28,12 +28,14 @@ source=(https://github.com/protocolbuffers/${_realname}/releases/download/v${pkg
         0001-fix-building-shared-libs-with-clang.patch
         0002-windres-invocation.patch
         0003-demote-error-about-buildtime-runtime-version-difference-to-warning.patch
-        0004-fix-build-with-gcc-15.patch)
+        0004-fix-build-with-gcc-15.patch
+	0005-pkgconfig-that-understands-static-libraries.patch)
 sha256sums=('12bfd76d27b9ac3d65c00966901609e020481b9474ef75c7ff4601ac06fa0b82'
             '0e8d4fcfad5bb0b635f1e1bbd2f4f85cb4d73b0a61fc33fae5136f062a40cfba'
             '174f714b842d5153c79c5fda1ae775ee002aea11d53cb5d5f51cb5c4b9e63d29'
             '2b680e1c642ccd5bb70b3dcf7217c27360bc0b74f63d8afb66dd668173d9b2dd'
-            'cb3594f1412422681768709c63139622b9f89c21f12b9bafa256ca44df8daa51')
+            'cb3594f1412422681768709c63139622b9f89c21f12b9bafa256ca44df8daa51'
+            'd118346d092caa8a3d6c02d88207d7cd9318fe3077b6b36cf32d1da79fe4128c')
 
 apply_patch_with_msg() {
   for _patch in "$@"
@@ -55,6 +57,9 @@ prepare() {
     apply_patch_with_msg \
       0004-fix-build-with-gcc-15.patch
   fi
+
+  apply_patch_with_msg \
+    0005-pkgconfig-that-understands-static-libraries.patch
 }
 
 build() {