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-rw-r--r--configure.cmake4
1 files changed, 2 insertions, 2 deletions
diff --git a/configure.cmake b/configure.cmake
index 6191ceef378..83fc34b752b 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -55,10 +55,10 @@ ENDIF()
# Always enable -Wall for gnu C/C++
-IF(CMAKE_COMPILER_IS_GNUCXX)
+IF(CMAKE_COMPILER_IS_GNUCXX AND NOT CMAKE_CXX_FLAGS MATCHES ".*-Wall.*")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused-parameter")
ENDIF()
-IF(CMAKE_COMPILER_IS_GNUCC)
+IF(CMAKE_COMPILER_IS_GNUCC AND NOT CMAKE_C_FLAGS MATCHES ".*-Wall.*")
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
ENDIF()