Ticket #53605: gcc6-libcxx.2.diff

lang/gcc6/Portfile

@@ -196 +196 @@
         ln -s libgcc/libstdc++.6.dylib ${destroot}${prefix}/lib/libstdc++.6.dylib
     }
 } else {
+
+foreach cdv {3.9 4.0} {
+    set cv [join [split ${cdv} "."] ""]
+    variant libcxx${cv} description "Build to use libc++ and the corresponding headers from port:clang-${cdv}" {}
+    if {[variant_isset libcxx${cv}]} {
+        depends_run-append  port:clang-${cdv}
+        patchfiles-append   patch-use-libcxx.diff
+        post-patch {
+            reinplace "s|@PREFIX@|${prefix}|g" ${worksrcpath}/gcc/incpath.c
+        }
+    }
+}
+
 depends_run-append         port:gcc_select
 
 post-destroot {
@@ -226 +239 @@
             }
         }
     }
+    foreach cdv {3.9 4.0} {
+        set cv [join [split ${cdv} "."] ""]
+        if {[variant_isset libcxx${cv}]} {
+            # move the stdc++ headers out of the way
+            xinstall -m 755 -d ${destroot}${prefix}/include/${name}-stdinc
+            file rename ${destroot}${prefix}/include/${name}/c++ ${destroot}${prefix}/include/${name}-stdinc/c++
+            # replace with a symlink to the corresponding libc++ headers
+            ui_msg "ln -s ${prefix}/libexec/llvm-${cdv}/include/c++/v1 ${destroot}${prefix}/include/${name}/c++"
+            ln -s ${prefix}/libexec/llvm-${cdv}/include/c++/v1 ${destroot}${prefix}/include/${name}/c++
+        }
+    }
 }
 
 select.group        gcc