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Use clang instead of gcc on OS X 10.9

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Apple replaced gcc with clang, but kept around a stub gcc to call
clang. This adds a check in `configure` to detect when gcc is
really clang, and switch to using clang in this situation.

Closes #10811.
This commit is contained in:
Erick Tryzelaar 2013-12-14 16:11:48 -08:00
parent bea3ec34dd
commit 460a966a58
1 changed files with 13 additions and 0 deletions
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13
configure vendored
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@ -549,6 +549,19 @@ then
err "either clang or gcc is required"
fi
# OS X 10.9, gcc is actually clang. This can cause some confusion in the build
# system, so if we find that gcc is clang, we should just use clang directly.
if [ $CFG_OSTYPE = apple-darwin -a -z "$CFG_ENABLE_CLANG" ]
then
CFG_OSX_GCC_VERSION=$("$CFG_GCC" --version 2>&1 | grep "Apple LLVM version")
if [ $? -eq 0 ]
then
step_msg "on OS X 10.9, forcing use of clang"
CFG_ENABLE_CLANG=1
putvar CFG_ENABLE_CLANG
fi
fi
if [ ! -z "$CFG_LLVM_ROOT" -a -e "$CFG_LLVM_ROOT/bin/llvm-config" ]
then
step_msg "using custom LLVM at $CFG_LLVM_ROOT"