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| author | Catherine <whitequark@whitequark.org> | 2023-02-23 02:37:47 +0000 |
|---|---|---|
| committer | myrtle <gatecat@ds0.me> | 2023-02-23 09:44:29 +0100 |
| commit | 088c822e289cafaf1af991243d77522d0ee934c9 (patch) | |
| tree | 89f90343467cb0739bdc068b8377b3bd5fdd7316 | |
| parent | e94479ccd55380e2e88ab94f44b5275d6adf44e6 (diff) | |
| download | nextpnr-088c822e289cafaf1af991243d77522d0ee934c9.tar.gz nextpnr-088c822e289cafaf1af991243d77522d0ee934c9.tar.bz2 nextpnr-088c822e289cafaf1af991243d77522d0ee934c9.zip | |
CMake: check if warning flag is supported before use.
Clang 11 is failing on -Wno-format-truncation.
| -rw-r--r-- | CMakeLists.txt | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 4d15f724..4fba1219 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1,6 +1,8 @@ cmake_minimum_required(VERSION 3.13) project(nextpnr CXX C) +include(CheckCXXCompilerFlag) + # Allow family.cmake add additional dependencies to gui_${family}. cmake_policy(SET CMP0079 NEW) @@ -134,7 +136,13 @@ if (MSVC) set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /W4 /wd4100 /wd4244 /wd4125 /wd4800 /wd4456 /wd4458 /wd4305 /wd4459 /wd4121 /wd4996 /wd4127") else() # N.B. the -Wno-array-bounds is to work around a false positive in GCC 9 - set(WARN_FLAGS "-Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-array-bounds -Wno-format-truncation") + set(WARN_FLAGS "-Wall -Wextra") + foreach(TRY_WARN_FLAG no-unused-parameter no-missing-field-initializers no-array-bounds no-format-truncation) + check_cxx_compiler_flag("-W${TRY_WARN_FLAG}" HAS_W${TRY_WARN_FLAG}) + if (HAS_W${TRY_WARN_FLAG}) + set(WARN_FLAGS "${WARN_FLAGS} -W${TRY_WARN_FLAG}") + endif() + endforeach() if (WERROR) set(WARN_FLAGS "${WARN_FLAGS} -Werror") endif() |