1 files changed, 26 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/compilers/gcc/patches/6/libstdc++-disable-flat_namespace.patch b/nixpkgs/pkgs/development/compilers/gcc/patches/6/libstdc++-disable-flat_namespace.patch
new file mode 100644
index 000000000000..571644410def
--- /dev/null
+++ b/nixpkgs/pkgs/development/compilers/gcc/patches/6/libstdc++-disable-flat_namespace.patch
@@ -0,0 +1,26 @@
+Backported from GCC 7.
+
+diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host
+index 304a7f5aff6..d1a189d93d0 100644
+--- a/libstdc++-v3/configure.host
++++ b/libstdc++-v3/configure.host
+@@ -234,7 +234,7 @@ case "${host_os}" in
+     os_include_dir="os/newlib"
+     OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
+     ;;
+-  darwin | darwin[1-7] | darwin[1-7].*)
++  darwin[1-7] | darwin[1-7].*)
+     # On Darwin, performance is improved if libstdc++ is single-module.
+     # Up to at least 10.3.7, -flat_namespace is required for proper
+     # treatment of coalesced symbols.
+@@ -252,6 +252,10 @@ case "${host_os}" in
+     esac
+     os_include_dir="os/bsd/darwin"
+     ;;
++  darwin*)
++    # Post Darwin8, defaults should be sufficient.
++    os_include_dir="os/bsd/darwin"
++    ;;
+   *djgpp*)      # leading * picks up "msdosdjgpp"
+     os_include_dir="os/djgpp"
+     error_constants_dir="os/djgpp"