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-rw-r--r--scons/llvm.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/scons/llvm.py b/scons/llvm.py
index a84ad51d97a..7ebcaf1c58c 100644
--- a/scons/llvm.py
+++ b/scons/llvm.py
@@ -123,7 +123,7 @@ def generate(env):
if env['platform'] == 'windows' and env['crosscompile']:
# LLVM 5.0 requires MinGW w/ pthreads due to use of std::thread and friends.
assert env['gcc']
- env['CXX'] = env['CXX'] + '-posix'
+ env.AppendUnique(CXXFLAGS = ['-posix'])
elif llvm_version >= distutils.version.LooseVersion('4.0'):
env.Prepend(LIBS = [
'LLVMX86Disassembler', 'LLVMX86AsmParser',