--- a/security/sandbox/moz.build
+++ b/security/sandbox/moz.build
@@ -170,8 +170,13 @@ elif CONFIG['OS_ARCH'] == 'WINNT':
         CXXFLAGS += [
             '-wd4275', # non dll-interface class exception used as base for dll-interface class
             '-wd4717', # recursive on all control paths, function will cause runtime stack overflow
             '-wd4996', # 'GetVersionExW': was declared deprecated
             '-wd4302', # 'reinterpret_cast': truncation from 'LPCSTR' to 'WORD'
             '-wd4311', # 'reinterpret_cast': pointer truncation from 'LPOVERLAPPED' to 'DWORD'
             '-wd4312', # 'reinterpret_cast': conversion from 'DWORD' to 'LPOVERLAPPED' of greater size
         ]
+    elif CONFIG['CC_TYPE'] == 'gcc':
+        CXXFLAGS += [
+            '-Wno-comment', # allow multi-line comments
+            '-Wno-unknown-pragmas', # warning push pragmas
+        ]