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-rw-r--r--tools/shared.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/shared.py b/tools/shared.py
index ec135edc..e41d7c5c 100644
--- a/tools/shared.py
+++ b/tools/shared.py
@@ -594,7 +594,7 @@ class Building:
env['CC'] = CLANG_CC
env['CXX'] = CLANG_CPP
env['LD'] = CLANG
- env['CFLAGS'] = '-O2'
+ env['CFLAGS'] = '-O2 -fno-math-errno'
return env
env['CC'] = EMCC if not WINDOWS else 'python %r' % EMCC
env['CXX'] = EMXX if not WINDOWS else 'python %r' % EMXX