scons: Filter-out NDEBUG define from llvm-config.
Based on a similar autoconf change from Marek.
diff --git a/scons/llvm.py b/scons/llvm.py
index b89899b..66f972d 100644
--- a/scons/llvm.py
+++ b/scons/llvm.py
@@ -141,7 +141,15 @@
llvm_version = distutils.version.LooseVersion(llvm_version)
try:
- env.ParseConfig('llvm-config --cppflags')
+ # Treat --cppflags specially to prevent NDEBUG from disabling
+ # assertion failures in debug builds.
+ cppflags = env.ParseFlags('!llvm-config --cppflags')
+ try:
+ cppflags['CPPDEFINES'].remove('NDEBUG')
+ except ValueError:
+ pass
+ env.MergeFlags(cppflags)
+
env.ParseConfig('llvm-config --libs')
env.ParseConfig('llvm-config --ldflags')
except OSError: