gcc11: fix build on aarch64-darwin

The libgcc configure script was middetecting aarch64-darwin and trying to use a deployment target of 10.5, which is not valid for that platform. The build was failing because the linker was looking for stubs that don’t exist (neither as part of the source releases nor as part of the official SDK from Apple). Backporting the `config.host` check and `t-darwin-rpath` from GCC 12 allows GCC 11 to build again on aarch64-darwin.
2023-11-08 10:50:07 +00:00
parent e556bb0b67
commit e06f05d23c
2 changed files with 24 additions and 0 deletions
@@ -0,0 +1,21 @@
+diff -u a/libgcc/config.host b/libgcc/config.host
+--- a/libgcc/config.host	2023-11-05 11:01:55.778638446 -0500
+++ b/libgcc/config.host	2023-11-05 11:07:29.405103979 -0500
+@@ -227,7 +227,7 @@
+   tmake_file="$tmake_file t-slibgcc-darwin"
+   # newer toolsets produce warnings when building for unsupported versions.
+   case ${host} in
+-    *-*-darwin1[89]* | *-*-darwin2* )
+    *-*-darwin1[89]* | *-*-darwin2* | aarch64*-*-darwin*)
+       tmake_file="t-darwin-min-8 $tmake_file"
+       ;;
+     *-*-darwin9* | *-*-darwin1[0-7]*)
+diff -ur a/libgcc/config/t-darwin-rpath b/libgcc/config/t-darwin-rpath
+--- a/libgcc/config/t-darwin-rpath	2023-11-05 11:34:18.691150009 -0500
+++ b/libgcc/config/t-darwin-rpath	2023-11-05 11:50:36.968920904 -0500
+@@ -2,4 +2,4 @@
+ SHLIB_RPATH = @rpath
+
+ # Which does not work for Darwin < 9
+-HOST_LIBGCC2_CFLAGS += -mmacosx-version-min=10.5
+SHLIB_LOADER_PATH = -Wl,-rpath,@loader_path
@@ -178,6 +178,9 @@ in
 # https://github.com/osx-cross/homebrew-avr/issues/280#issuecomment-1272381808
 ++ optional (is11 && stdenv.isDarwin && targetPlatform.isAvr) ./avr-gcc-11.3-darwin.patch

+# libgcc’s `configure` script misdetects aarch64-darwin, resulting in an invalid deployment target.
++ optional (is11 && stdenv.isDarwin && stdenv.isAarch64) ./11/libgcc-aarch64-darwin-detection.patch
+
 # openjdk build fails without this on -march=opteron; is upstream in gcc12
 ++ optionals (is11) [ ./11/gcc-issue-103910.patch ]