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[CMake] Prepend compiler flags, fix Clang compiler warnings 

Because of issue https://github.com/xiph/flac/issues/437 compiler
flags are prepended instead of appended, so the user can override
them without altering the CMakeLists.txt.

Also, Clang doesn't support per-function optimize options, so in
CMake the fma file gets that option per-file. This is not supported
by automake.
This commit is contained in:
Martijn van Beurden 2022-09-17 09:20:15 +02:00 committed by GitHub
parent 526b28a95e
commit 1c0eea679a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 9 additions and 5 deletions
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9
CMakeLists.txt
View File

@ -83,14 +83,15 @@ if(NOT WIN32)
endif()
if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Winline")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -funroll-loops")
set(CMAKE_C_FLAGS "-Wall -Wextra -Wstrict-prototypes -Wmissing-prototypes -Waggregate-return -Wcast-align -Wnested-externs -Wshadow -Wundef -Wmissing-declarations -Winline ${CMAKE_C_FLAGS}")
set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG ${CMAKE_C_FLAGS_RELEASE}")
endif()
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wcast-align -Wshadow -Wwrite-strings -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Wsign-promo -Wundef")
set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wcast-align -Wshadow -Wwrite-strings -Wctor-dtor-privacy -Wnon-virtual-dtor -Wreorder -Wsign-promo -Wundef ${CMAKE_CXX_FLAGS}")
set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG ${CMAKE_CXX_FLAGS_RELEASE}")
endif()
if(MSVC)
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /O2 /Ob2 /Oi /Ot /Oy")
set(CMAKE_C_FLAGS_RELEASE "/O2 /Ob2 /Oi /Ot /Oy /DNDEBUG ${CMAKE_C_FLAGS_RELEASE}")
endif()
include(CMakePackageConfigHelpers)

3
src/libFLAC/CMakeLists.txt
View File

@ -24,6 +24,9 @@ if(FLAC__CPU_X86_64 OR FLAC__CPU_IA32)
set_source_files_properties(lpc_intrin_avx2.c stream_encoder_intrin_avx2.c PROPERTIES COMPILE_FLAGS /arch:AVX2)
set_source_files_properties(lpc_intrin_fma.c PROPERTIES COMPILE_FLAGS "/arch:AVX2 /fp:fast")
endif()
if(WITH_AVX AND (CMAKE_C_COMPILER_ID MATCHES "Clang"))
set_source_files_properties(lpc_intrin_fma.c PROPERTIES COMPILE_FLAGS "-ffast-math")
endif()
else()
check_cpu_arch_ppc64(FLAC__CPU_PPC64)
if(FLAC__CPU_PPC64)

2
src/libFLAC/include/private/cpu.h
View File

@ -81,7 +81,7 @@
#endif
#elif defined __clang__ && __has_attribute(__target__) /* clang */
#define FLAC__SSE_TARGET(x) __attribute__ ((__target__ (x)))
#define FLAC__FAST_MATH_TARGET(x) __attribute__ ((__target__ (x), optimize("-ffast-math")))
#define FLAC__FAST_MATH_TARGET(x) __attribute__ ((__target__ (x)))
#if __has_builtin(__builtin_ia32_maxps)
#define FLAC__SSE_SUPPORTED 1
#endif