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Fix cmake `-Wno` compiler flag testing (#6145)

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Martin Stadler 2025-07-10 01:31:42 +02:00 committed by GitHub
parent 9fc7143fce
commit d1462f3120
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1 changed files with 32 additions and 2 deletions
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34
verilator-config.cmake.in
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@ -68,15 +68,45 @@ function(_verilator_check_cxx_libraries LIBRARIES RESVAR)
set("${RESVAR}" "${${RESVAR}}" PARENT_SCOPE)
endfunction()
function(_verilator_check_cxx_compiler_flag FLAG RESVAR)
# Check whether the compiler understands the flag FLAG
set(_VERILATOR_CHECK_CXX_COMPILER_FLAG_SRC
"
#warning warning
int main() { return 0; }
"
)
set(CMAKE_REQUIRED_FLAGS ${FLAG})
# Make sure the compiler warning is not turned into an error
string(APPEND CMAKE_REQUIRED_FLAGS " -Wno-error=cpp")
set(CMAKE_REQUIRED_DEFINITIONS)
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_LINK_OPTIONS)
set(CMAKE_REQUIRED_LIBRARIES)
set(CMAKE_REQUIRED_QUIET)
check_compiler_flag_common_patterns(_common_patterns)
check_cxx_source_compiles(
"${_VERILATOR_CHECK_CXX_COMPILER_FLAG_SRC}"
"${RESVAR}"
FAIL_REGEX
"command[ -]line option .* is valid for .* but not for C[+][+]"
FAIL_REGEX
"-Werror=.* argument .* is not valid for C[+][+]"
${_common_patterns}
)
set("${RESVAR}" "${${RESVAR}}" PARENT_SCOPE)
endfunction()
# Check compiler flag support. Skip on MSVC, these are all GCC flags.
if(NOT CMAKE_CXX_COMPILER_ID MATCHES MSVC)
if(NOT DEFINED VERILATOR_CFLAGS OR NOT DEFINED VERILATOR_MT_CFLAGS)
include(CheckCXXCompilerFlag)
foreach(FLAG @CFG_CXX_FLAGS_CMAKE@)
string(MAKE_C_IDENTIFIER ${FLAG} FLAGNAME)
check_cxx_compiler_flag(${FLAG} ${FLAGNAME})
_verilator_check_cxx_compiler_flag(${FLAG} ${FLAGNAME})
if(${FLAGNAME})
list(APPEND VERILATOR_CFLAGS ${FLAG})
list(APPEND VERILATOR_CFLAGS $<$<COMPILE_LANGUAGE:CXX>:${FLAG}>)
endif()
endforeach()
foreach(FLAG @CFG_LDFLAGS_THREADS_CMAKE@)