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CMake: check if warning flag is supported before use.

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Clang 11 is failing on -Wno-format-truncation.
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Catherine 2023-02-23 02:37:47 +00:00 committed by myrtle
parent e94479ccd5
commit 088c822e28
1 changed files with 9 additions and 1 deletions
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10
CMakeLists.txt
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@ -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()