From b0743fdcda5e203c5b379d6b78a8adb74c4084ff Mon Sep 17 00:00:00 2001
From: Ray Donnelly <mingw.android@gmail.com>
Date: Sun, 22 Nov 2015 14:39:23 +0000
Subject: Clang: Use {C,CXX}FLAG -fbracket-depth=512 for GCC build

https://llvm.org/bugs/show_bug.cgi?id=19650
https://gcc.gnu.org/ml/gcc/2014-05/msg00014.html

Signed-off-by: Ray Donnelly <mingw.android@gmail.com>

diff --git a/scripts/build/cc/100-gcc.sh b/scripts/build/cc/100-gcc.sh
index 5674c30..6ed9e9c 100644
--- a/scripts/build/cc/100-gcc.sh
+++ b/scripts/build/cc/100-gcc.sh
@@ -426,6 +426,12 @@ do_gcc_core_backend() {
 
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
+    # Clang's default bracket-depth is 256, and building GCC
+    # requires somewhere between 257 and 512.
+    if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
+        cflags="$cflags "-fbracket-depth=512
+    fi
+
     # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
     CT_DoExecLog CFG                                   \
     CC_FOR_BUILD="${CT_BUILD}-gcc"                     \
@@ -916,6 +922,13 @@ do_gcc_backend() {
 
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
+    # https://gcc.gnu.org/ml/gcc/2014-05/msg00014.html
+    # "gcc 4.9.0 do not build on OSX" .. because Clang's default
+    # bracket-depth is 256
+    if ${CT_BUILD}-gcc --version 2>&1 | grep clang; then
+        cflags="$cflags "-fbracket-depth=512
+    fi
+
     CT_DoExecLog CFG                                \
     CC_FOR_BUILD="${CT_BUILD}-gcc"                  \
     CFLAGS="${cflags}"                              \
-- 
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