Ticket #63677: gcc11_patch_macOS12_arm64

--- /opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/ports/lang/gcc11/Portfile.o    2021-11-02 23:35:56.000000000 +0100
+++ /opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/ports/lang/gcc11/Portfile      2021-11-21 10:25:59.000000000 +0100
@@ -51,6 +51,13 @@
     checksums       rmd160  ccb26e52571aff9230f4bdf067fe8c9d1fb79235 \
                     sha256  ce862b4a4bdc8f36c9240736d23cd625a48af82c2332d2915df0e16e1609a74c \
                     size    125460899
+    pre-build {
+        file mkdir /usr/local/lib
+        ln -fs ${workpath}/build/gcc/libgcc_s.1.1.dylib /usr/local/lib/
+    }
+    post-build {
+        file delete /usr/local/lib/libgcc_s.1.1.dylib
+    }
 } else {
     distname        gcc-${version}
     use_xz          yes
@@ -378,6 +385,7 @@
 
         # Move temporary lib dir back in place
         move ${destroot}${prefix}/lib/libgcc.merged ${destroot}${prefix}/lib/libgcc
+        system "chmod a+x ${destroot}${prefix}/lib/libgcc/*.dylib"
 
         # For binary compatibility with binaries that linked against the old libstdcxx port
         ln -s libgcc/libstdc++.6.dylib ${destroot}${prefix}/lib/libstdc++.6.dylib