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https://github.com/VectorCamp/vectorscan.git
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WIP: Refactor CMake build system to more modular
This commit is contained in:
Konstantinos Margaritis
164
cmake/cflags-generic.cmake
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164
cmake/cflags-generic.cmake
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# set compiler flags - more are tested and added later
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set(EXTRA_C_FLAGS "${OPT_C_FLAG} -std=c17 -Wall -Wextra -Wshadow -Wcast-qual -fno-strict-aliasing")
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set(EXTRA_CXX_FLAGS "${OPT_CXX_FLAG} -std=c++17 -Wall -Wextra -Wshadow -Wswitch -Wreturn-type -Wcast-qual -Wno-deprecated -Wnon-virtual-dtor -fno-strict-aliasing")
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if (NOT CMAKE_COMPILER_IS_CLANG)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -fno-new-ttp-matching")
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endif()
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if (NOT RELEASE_BUILD)
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# -Werror is most useful during development, don't potentially break
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# release builds
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Werror")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Werror")
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if (CMAKE_COMPILER_IS_CLANG)
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if (CMAKE_C_COMPILER_VERSION VERSION_GREATER "13.0")
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-unused-but-set-variable")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-unused-but-set-variable")
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endif()
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endif()
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endif()
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if (DISABLE_ASSERTS)
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -DNDEBUG")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -DNDEBUG")
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endif()
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if(CMAKE_COMPILER_IS_GNUCC)
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# spurious warnings?
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-array-bounds -Wno-maybe-uninitialized")
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endif()
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if(CMAKE_COMPILER_IS_GNUCXX)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-maybe-uninitialized")
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if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -fabi-version=0")
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endif ()
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# don't complain about abi
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-abi")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-abi")
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endif()
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if (NOT(ARCH_IA32 AND RELEASE_BUILD))
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -fno-omit-frame-pointer")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -fno-omit-frame-pointer")
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endif()
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CHECK_INCLUDE_FILES(unistd.h HAVE_UNISTD_H)
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CHECK_FUNCTION_EXISTS(posix_memalign HAVE_POSIX_MEMALIGN)
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CHECK_FUNCTION_EXISTS(_aligned_malloc HAVE__ALIGNED_MALLOC)
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# these end up in the config file
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CHECK_C_COMPILER_FLAG(-fvisibility=hidden HAS_C_HIDDEN)
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CHECK_CXX_COMPILER_FLAG(-fvisibility=hidden HAS_CXX_HIDDEN)
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# are we using libc++
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CHECK_CXX_SYMBOL_EXISTS(_LIBCPP_VERSION ciso646 HAVE_LIBCPP)
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if (RELEASE_BUILD)
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if (HAS_C_HIDDEN)
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -fvisibility=hidden")
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endif()
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if (HAS_CXX_HIDDEN)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -fvisibility=hidden")
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endif()
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endif()
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# testing a builtin takes a little more work
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CHECK_C_SOURCE_COMPILES("void *aa_test(void *x) { return __builtin_assume_aligned(x, 16);}\nint main(void) { return 0; }" HAVE_CC_BUILTIN_ASSUME_ALIGNED)
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CHECK_CXX_SOURCE_COMPILES("void *aa_test(void *x) { return __builtin_assume_aligned(x, 16);}\nint main(void) { return 0; }" HAVE_CXX_BUILTIN_ASSUME_ALIGNED)
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# Clang does not use __builtin_constant_p() the same way as gcc
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if (NOT CMAKE_COMPILER_IS_CLANG)
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CHECK_C_SOURCE_COMPILES("int main(void) { __builtin_constant_p(0); }" HAVE__BUILTIN_CONSTANT_P)
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endif()
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set(C_FLAGS_TO_CHECK
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# Variable length arrays are way bad, most especially at run time
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"-Wvla"
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# Pointer arith on void pointers is doing it wrong.
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"-Wpointer-arith"
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# Build our C code with -Wstrict-prototypes -Wmissing-prototypes
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"-Wstrict-prototypes"
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"-Wmissing-prototypes"
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)
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foreach (FLAG ${C_FLAGS_TO_CHECK})
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# munge the name so it doesn't break things
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string(REPLACE "-" "_" FNAME C_FLAG${FLAG})
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CHECK_C_COMPILER_FLAG("${FLAG}" ${FNAME})
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if (${FNAME})
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} ${FLAG}")
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endif()
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endforeach()
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# self-assign should be thrown away, but clang whinges
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CHECK_C_COMPILER_FLAG("-Wself-assign" CC_SELF_ASSIGN)
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if (CC_SELF_ASSIGN)
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-self-assign")
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endif()
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CHECK_CXX_COMPILER_FLAG("-Wself-assign" CXX_SELF_ASSIGN)
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if (CXX_SELF_ASSIGN)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-self-assign")
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endif()
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# clang gets up in our face for going paren crazy with macros
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CHECK_C_COMPILER_FLAG("-Wparentheses-equality" CC_PAREN_EQUALITY)
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if (CC_PAREN_EQUALITY)
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-parentheses-equality")
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endif()
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# clang complains about unused const vars in our Ragel-generated code.
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CHECK_CXX_COMPILER_FLAG("-Wunused-const-variable" CXX_UNUSED_CONST_VAR)
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if (CXX_UNUSED_CONST_VAR)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-unused-const-variable")
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endif()
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# clang-14 complains about unused-but-set variable.
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CHECK_CXX_COMPILER_FLAG("-Wunused-but-set-variable" CXX_UNUSED_BUT_SET_VAR)
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if (CXX_UNUSED_BUT_SET_VAR)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-unused-but-set-variable")
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endif()
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# clang-14 complains about using bitwise operator instead of logical ones.
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CHECK_CXX_COMPILER_FLAG("-Wbitwise-instead-of-logical" CXX_BITWISE_INSTEAD_OF_LOGICAL)
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if (CXX_BITWISE_INSTEAD_OF_LOGICAL)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-bitwise-instead-of-logical")
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endif()
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# clang-14 complains about using bitwise operator instead of logical ones.
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CHECK_CXX_COMPILER_FLAG("-Wbitwise-instead-of-logical" CXX_BITWISE_INSTEAD_OF_LOGICAL)
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if (CXX_BITWISE_INSTEAD_OF_LOGICAL)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-bitwise-instead-of-logical")
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endif()
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CHECK_CXX_COMPILER_FLAG("-Wignored-attributes" CXX_IGNORED_ATTR)
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if (CXX_IGNORED_ATTR)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-ignored-attributes")
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endif()
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# gcc 9 complains about redundant move for returned variable
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CHECK_CXX_COMPILER_FLAG("-Wredundant-move" CXX_REDUNDANT_MOVE)
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if (CXX_REDUNDANT_MOVE)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-redundant-move")
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endif()
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# note this for later, g++ doesn't have this flag but clang does
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CHECK_CXX_COMPILER_FLAG("-Wweak-vtables" CXX_WEAK_VTABLES)
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if (CXX_WEAK_VTABLES)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wweak-vtables")
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endif()
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CHECK_CXX_COMPILER_FLAG("-Wmissing-declarations" CXX_MISSING_DECLARATIONS)
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if (CXX_MISSING_DECLARATIONS)
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wmissing-declarations")
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endif()
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CHECK_CXX_COMPILER_FLAG("-Wunused-local-typedefs" CXX_UNUSED_LOCAL_TYPEDEFS)
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CHECK_CXX_COMPILER_FLAG("-Wunused-variable" CXX_WUNUSED_VARIABLE)
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# gcc 10 complains about this
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CHECK_C_COMPILER_FLAG("-Wstringop-overflow" CC_STRINGOP_OVERFLOW)
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CHECK_CXX_COMPILER_FLAG("-Wstringop-overflow" CXX_STRINGOP_OVERFLOW)
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if(CC_STRINGOP_OVERFLOW OR CXX_STRINGOP_OVERFLOW)
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set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-stringop-overflow")
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set(EXTRA_CXX_FLAGS "${EXTRA_CXX_FLAGS} -Wno-stringop-overflow")
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endif()
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