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-rw-r--r--mkspecs/features/default_post.prf2
1 files changed, 1 insertions, 1 deletions
diff --git a/mkspecs/features/default_post.prf b/mkspecs/features/default_post.prf
index 9eba5bcf00..5367b17973 100644
--- a/mkspecs/features/default_post.prf
+++ b/mkspecs/features/default_post.prf
@@ -134,7 +134,7 @@ c++11|c++14|c++1z {
isEmpty(QMAKE_CXXFLAGS_GNU$$cxxstd) {
strict_c++: QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_STRICTCXX
} else {
- !strict_c++: cxxstd = GNU$$cxxstd
+ !strict_c++|isEmpty(QMAKE_CXXFLAGS_$$cxxstd): cxxstd = GNU$$cxxstd
}
QMAKE_CXXFLAGS += $$eval(QMAKE_CXXFLAGS_$$cxxstd)