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-rw-r--r--mkspecs/common/clang.conf2
1 files changed, 2 insertions, 0 deletions
diff --git a/mkspecs/common/clang.conf b/mkspecs/common/clang.conf
index e03dc7de14..1666843136 100644
--- a/mkspecs/common/clang.conf
+++ b/mkspecs/common/clang.conf
@@ -16,6 +16,8 @@ QMAKE_LINK_SHLIB = $$QMAKE_CXX
CONFIG += clang_pch_style
QMAKE_PCH_OUTPUT_EXT = .pch
+QMAKE_CFLAGS_OPTIMIZE_SIZE = -Oz
+
QMAKE_CFLAGS_ISYSTEM = -isystem
QMAKE_CFLAGS_PRECOMPILE = -x c-header -c ${QMAKE_PCH_INPUT} -o ${QMAKE_PCH_OUTPUT}
QMAKE_CFLAGS_USE_PRECOMPILE = -Xclang -include-pch -Xclang ${QMAKE_PCH_OUTPUT}