libobjc2: Add clang64 support

Upstream libobjc2 now has clang64 support (via
gnustep/libobjc2#276).

Cherry-pick that commit and add clang64 to the build matrix for
libobjc2.  This cherry-picked commit also fixes the ".dll.a" suffix for
library objects.

Author: qmfrederik

mingw-w64-libobjc2/PKGBUILD

@@ -7,7 +7,7 @@ pkgver=2.2
 pkgrel=1
 pkgdesc="Objective-C runtime library intended for use with Clang. (mingw-w64)"
 arch=('any')
-mingw_arch=('mingw64' 'ucrt64')
+mingw_arch=('mingw64' 'ucrt64' 'clang64')
 url="https://github.com/gnustep/libobjc2"
 license=('spdx:MIT')
 makedepends=("${MINGW_PACKAGE_PREFIX}-cmake"
@@ -16,14 +16,18 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cmake"
              'git')
 source=("https://github.com/gnustep/${_realname}/archive/refs/tags/v${pkgver}.zip"
         # Install runtime files in CMAKE_INSTALL_BINDIR when GNUstep is not installed
-        "https://github.com/gnustep/libobjc2/commit/639c676bb8033422539e19a2e2888bdbd06507e5.patch")
+        "https://github.com/gnustep/libobjc2/commit/639c676bb8033422539e19a2e2888bdbd06507e5.patch"
+        # Support building on msys/clang64
+        "https://github.com/gnustep/libobjc2/commit/1ff5e1298dd76aa370d5a12b690857f9a47b4b56.patch")
 sha256sums=('3f72ea4955e3e4671d64c64c339f4947b6112b1b2dd02377c5c982057bbeda04'
-            'aaa23146b3c2ec442b5dbf20606020bddd15230041ad738ef3a06e92d13605c3')
+            'aaa23146b3c2ec442b5dbf20606020bddd15230041ad738ef3a06e92d13605c3'
+            'fba7d33aa03ee7383b559c5b845063acd16b45396520250849f22559577adcc9')
 
 prepare() {
   cd ${srcdir}/${_realname}-${pkgver}
 
   patch -p1 -i ${srcdir}/639c676bb8033422539e19a2e2888bdbd06507e5.patch
+  patch -p1 -i ${srcdir}/1ff5e1298dd76aa370d5a12b690857f9a47b4b56.patch
 }
 
 build() {
@@ -36,7 +40,14 @@ build() {
     extra_config+=("-DCMAKE_BUILD_TYPE=Debug")
   fi
 
-  export LDFLAGS="-fuse-ld=lld -lstdc++ -lgcc_s"
+  case ${MSYSTEM} in
+    MINGW*|UCRT*)
+      export LDFLAGS="-fuse-ld=lld -lstdc++ -lgcc_s"
+      ;;
+    CLANG*)
+      export LDFLAGS="-lc++"
+      ;;
+  esac
 
   MSYS2_ARG_CONV_EXCL="-DCMAKE_INSTALL_PREFIX=" \
     "${MINGW_PREFIX}"/bin/cmake.exe \
@@ -54,14 +65,19 @@ build() {
 check() {
   cd "${srcdir}/build-${MSYSTEM}"
 
-  "${MINGW_PREFIX}"/bin/cmake.exe --build . --target test
+  declare -a extra_flags
+
+  if [[ ${MSYSTEM} == CLANG* ]]; then
+    extra_flags="-E UnexpectedException*"
+  fi
+
+  "${MINGW_PREFIX}"/bin/ctest.exe $extra_flags
 }
 
 package() {
   cd "${srcdir}/build-${MSYSTEM}"
 
   DESTDIR="${pkgdir}" "${MINGW_PREFIX}"/bin/cmake.exe --install .
 
-  mv ${pkgdir}${MINGW_PREFIX}/lib/objc.lib ${pkgdir}${MINGW_PREFIX}/lib/objc.dll.a
   install -Dm644 "${srcdir}/${_realname}-${pkgver}/COPYING" "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/COPYING"
 }