Ticket #53194: Portfile.diff

Portfile

@@ -431 +431 @@
         }
     }
 
+    variant libstdcxx description {cause -stdlib=libstdc++ to search for MacPorts GCC} {
+        depends_lib-append port:gcc6
+
+        patchfiles-append patch-macports-libstdcxx.diff
+
+        post-patch {
+            reinplace "s|@@MACPORTS_GCC_INCLUDE_DIR@@|${prefix}/include/gcc6/c++|g" \
+                ${worksrcpath}/tools/clang/lib/Frontend/InitHeaderSearch.cpp
+            reinplace "s|@@MACPORTS_HOST_NAME@@|${build_arch}-apple-darwin${os.major}|g" \
+                ${worksrcpath}/tools/clang/lib/Frontend/InitHeaderSearch.cpp
+            reinplace "s|@@MACPORTS_libstdc++@@|${prefix}/lib/libgcc/libstdc++.6.dylib|g" \
+                ${worksrcpath}/tools/clang/lib/Driver/ToolChains.cpp
+        }
+    }
+    default_variants +libstdcxx
+
     post-patch {
         reinplace "s|@@PREFIX@@|${prefix}|" \
             ${worksrcpath}/tools/clang/lib/Driver/Tools.cpp