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| author | Sergey Sharybin <sergey.vfx@gmail.com> | 2017-05-22 12:08:10 +0300 |
|---|---|---|
| committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2017-05-22 12:08:10 +0300 |
| commit | bd09b51379ee1281cf94f94d2ca58b9658bb49e3 (patch) | |
| tree | bcfad075af8d60314ac35c14d7d14cdadaeec01f /CMakeLists.txt | |
| parent | f3d9f0c779ca788d5c1c4755bb211b4fb3a26310 (diff) | |
Fix/workaround GCC bug about -Wno-implicit-fallthrough
For some reason GCC-6 successfully compiles test program with
-Wno-implicit-fallthrough passed via command line. It just
silently ignores the unknown arguments which are starting with
-Wno-.
The issue is, if some other waning happens in the code, then
GCC will complain about unknown -Wno- argument which is not
supported by current GCC version.
This makes some misleading warning prints about unknown
command line argument when any other warning happens in code
from extern/.
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 2284146b3ab..5efe96df9e5 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1389,7 +1389,10 @@ if(CMAKE_COMPILER_IS_GNUCC) # flags to undo strict flags ADD_CHECK_C_COMPILER_FLAG(CC_REMOVE_STRICT_FLAGS C_WARN_NO_DEPRECATED_DECLARATIONS -Wno-deprecated-declarations) ADD_CHECK_C_COMPILER_FLAG(CC_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_PARAMETER -Wno-unused-parameter) - ADD_CHECK_C_COMPILER_FLAG(CC_REMOVE_STRICT_FLAGS C_WARN_NO_IMPLICIT_FALLTHROUGH -Wno-implicit-fallthrough) + + if(CMAKE_COMPILER_IS_GNUCC AND (NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "7.0")) + ADD_CHECK_C_COMPILER_FLAG(CC_REMOVE_STRICT_FLAGS C_WARN_NO_IMPLICIT_FALLTHROUGH -Wno-implicit-fallthrough) + endif() if(NOT APPLE) ADD_CHECK_C_COMPILER_FLAG(CC_REMOVE_STRICT_FLAGS C_WARN_NO_ERROR_UNUSED_BUT_SET_VARIABLE -Wno-error=unused-but-set-variable) |