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cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
project(ffts C ASM)
# TODO: to support AutoConfigure building, this should came from "template" file
set(FFTS_MAJOR 0)
set(FFTS_MINOR 9)
set(FFTS_MICRO 0)
set(FFTS_VERSION "ffts-${FFTS_MAJOR}.${FFTS_MINOR}.${FFTS_MICRO}")
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
# default build type is Debug which means no optimization
if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE "Release")
endif(NOT CMAKE_BUILD_TYPE)
# installation parameters
set(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include/ffts)
set(LIB_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib)
# common options
option(ENABLE_NEON
"Enables the use of NEON instructions." OFF
)
option(ENABLE_VFP
"Enables the use of VFP instructions." OFF
)
option(DISABLE_DYNAMIC_CODE
"Disables the use of dynamic machine code generation." OFF
)
option(GENERATE_POSITION_INDEPENDENT_CODE
"Generate position independent code" OFF
)
option(ENABLE_SHARED
"Enable building a shared library." OFF
)
option(ENABLE_STATIC
"Enable building a static library." ON
)
include(CheckCSourceCompiles)
include(CheckCSourceRuns)
include(CheckIncludeFile)
# Ensure defined when building FFTS (as opposed to using it from
# another project). Used to export functions from Windows DLL.
add_definitions(-DFFTS_BUILD)
# check existence of various headers
check_include_file(malloc.h HAVE_MALLOC_H)
check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(stdlib.h HAVE_STDLIB_H)
check_include_file(string.h HAVE_STRING_H)
check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
check_include_file(unistd.h HAVE_UNISTD_H)
if(HAVE_MALLOC_H)
add_definitions(-DHAVE_MALLOC_H)
endif(HAVE_MALLOC_H)
if(HAVE_STDINT_H)
add_definitions(-DHAVE_STDINT_H)
endif(HAVE_STDINT_H)
if(HAVE_STDLIB_H)
add_definitions(-DHAVE_STDLIB_H)
endif(HAVE_STDLIB_H)
if(HAVE_STRING_H)
add_definitions(-DHAVE_STRING_H)
endif(HAVE_STRING_H)
if(HAVE_SYS_MMAN_H)
add_definitions(-DHAVE_SYS_MMAN_H)
endif(HAVE_SYS_MMAN_H)
if(HAVE_UNISTD_H)
add_definitions(-DHAVE_UNISTD_H)
endif(HAVE_UNISTD_H)
# backup flags
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
# Determinate if we are cross-compiling
if(NOT CMAKE_CROSSCOMPILING)
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
# Determinate ARM architecture
# Try to execute quietly without messages
set(CMAKE_REQUIRED_QUIET 1)
# The test for ARM architecture
set(TEST_SOURCE_CODE "int main() { return 0; }")
# GCC documentation says "native" is only supported on Linux, but let's try
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -march=native")
check_c_source_runs("${TEST_SOURCE_CODE}" GCC_MARCH_NATIVE_FLAG_SUPPORTED)
if(NOT GCC_MARCH_NATIVE_FLAG_SUPPORTED)
# Fallback trying generic ARMv7
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -march=armv7-a")
check_c_source_runs("${TEST_SOURCE_CODE}" GCC_MARCH_ARMV7A_FLAG_SUPPORTED)
if(NOT GCC_MARCH_ARMV7A_FLAG_SUPPORTED)
# Fallback trying generic ARMv6
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -march=armv6")
check_c_source_runs("${TEST_SOURCE_CODE}" GCC_MARCH_ARMV6_FLAG_SUPPORTED)
if(NOT GCC_MARCH_ARMV6_FLAG_SUPPORTED)
message(WARNING "FFTS failed to determinate ARM architecture")
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
else()
message("FFTS is build using 'march=armv6'")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -march=armv6")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv6")
endif(NOT GCC_MARCH_ARMV6_FLAG_SUPPORTED)
else()
message("FFTS is build using 'march=armv7-a'")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -march=armv7-a")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv7-a")
endif(NOT GCC_MARCH_ARMV7A_FLAG_SUPPORTED)
else()
message("FFTS is build using 'march=native'")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -march=native")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=native")
endif(NOT GCC_MARCH_NATIVE_FLAG_SUPPORTED)
# Determinate what floating-point hardware (or hardware emulation) is available
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
# The test for ARM NEON support
set(TEST_SOURCE_CODE "
#include <arm_neon.h>
int main()
{
float32x4_t v;
float zeros[4] = {0.0f, 0.0f, 0.0f, 0.0f};
v = vld1q_f32(zeros);
return 0;
}"
)
# Test running with -mfpu=neon and -mfloat-abi=hard
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -mfpu=neon -mfloat-abi=hard")
check_c_source_runs("${TEST_SOURCE_CODE}" NEON_HARDFP_SUPPORTED)
if(NOT NEON_HARDFP_SUPPORTED)
# Test running with -mfpu=neon and -mfloat-abi=softfp
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -mfpu=neon -mfloat-abi=softfp")
check_c_source_runs("${TEST_SOURCE_CODE}" NEON_SOFTFP_SUPPORTED)
if(NOT NEON_SOFTFP_SUPPORTED)
if(ENABLE_NEON)
message(FATAL_ERROR "FFTS cannot enable NEON on this platform")
endif(ENABLE_NEON)
else()
message("FFTS is using 'neon' FPU and 'softfp' float ABI")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mfpu=neon -mfloat-abi=softfp")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon -mfloat-abi=softfp")
set(ENABLE_NEON ON)
endif(NOT NEON_SOFTFP_SUPPORTED)
else()
message("FFTS is using 'neon' FPU and 'hard' float ABI")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mfpu=neon -mfloat-abi=hard")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon -mfloat-abi=hard")
set(ENABLE_NEON ON)
endif(NOT NEON_HARDFP_SUPPORTED)
# Fallback using VFP if NEON is not supported
if(NOT NEON_HARDFP_SUPPORTED AND NOT NEON_SOFTFP_SUPPORTED)
# Test for ARM VFP support
set(TEST_SOURCE_CODE "
double sum(double a, double b)
{
return a + b;
}
int main()
{
double s1, s2, v1 = 1.0, v2 = 2.0, v3 = 1.0e-322;
s1 = sum(v1, v2);
s2 = sum(v3, v3);
return 0;
}"
)
# Test running with -mfpu=vfp
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -mfpu=vfp")
check_c_source_runs("${TEST_SOURCE_CODE}" VFP_SUPPORTED)
if(NOT VFP_SUPPORTED)
# Fallback using emulation if VFP is not supported
if(ENABLE_VFP)
message(FATAL_ERROR "FFTS cannot enable VFP on this platform")
endif(ENABLE_VFP)
message(WARNING "FFTS is using 'soft' FPU")
else()
message("FFTS is using 'vfp' FPU")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mfpu=vfp")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=vfp")
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
set(ENABLE_VFP ON)
endif(NOT VFP_SUPPORTED)
# Test running with -mfloat-abi=hard
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -mfloat-abi=hard")
# Use the same test as before
check_c_source_runs("${TEST_SOURCE_CODE}" HARDFP_SUPPORTED)
if(NOT HARDFP_SUPPORTED)
# Test running with -mfloat-abi=softfp
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -mfloat-abi=softfp")
check_c_source_runs("${TEST_SOURCE_CODE}" SOFTFP_SUPPORTED)
if(NOT SOFTFP_SUPPORTED)
# Most likely development libraries are missing
message(WARNING "FFTS is using 'soft' float ABI")
else()
message("FFTS is using 'softfp' float ABI")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mfloat-abi=softfp")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=softfp")
endif(NOT SOFTFP_SUPPORTED)
else()
message("FFTS is using 'hard' float ABI")
set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} -mfloat-abi=hard")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfloat-abi=hard")
endif(NOT HARDFP_SUPPORTED)
endif(NOT NEON_HARDFP_SUPPORTED AND NOT NEON_SOFTFP_SUPPORTED)
else()
# enable SSE code generation
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -msse")
endif(CMAKE_COMPILER_IS_GNUCC)
# check if the platform has support for SSE intrinsics
check_include_file(xmmintrin.h HAVE_XMMINTRIN_H)
if(HAVE_XMMINTRIN_H)
add_definitions(-DHAVE_SSE)
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
endif(HAVE_XMMINTRIN_H)
# enable SSE2 code generation
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -msse2")
endif(CMAKE_COMPILER_IS_GNUCC)
# check if the platform has support for SSE2 intrinsics
check_include_file(emmintrin.h HAVE_EMMINTRIN_H)
if(HAVE_EMMINTRIN_H)
add_definitions(-DHAVE_SSE2)
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
endif(HAVE_EMMINTRIN_H)
# enable SSE3 code generation
if(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS_SAVE} -msse3")
endif(CMAKE_COMPILER_IS_GNUCC)
# check if the platform has support for SSE3 intrinsics
check_include_file(pmmintrin.h HAVE_PMMINTRIN_H)
if(HAVE_PMMINTRIN_H)
add_definitions(-DHAVE_PMMINTRIN_H)
add_definitions(-DHAVE_SSE3)
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
else()
# check if the platform has specific intrinsics
check_include_file(intrin.h HAVE_INTRIN_H)
if(HAVE_INTRIN_H)
add_definitions(-DHAVE_INTRIN_H)
check_c_source_compiles("
#include<intrin.h>
int main(int argc, char** argv)
{
(void) argv;
(void) argc;
return _mm_movemask_ps(_mm_moveldup_ps(_mm_set_ss(1.0f)));
}" HAVE__MM_MOVELDUP_PS
)
if(HAVE__MM_MOVELDUP_PS)
# assume that we have all SSE3 intrinsics
add_definitions(-DHAVE_SSE3)
endif(HAVE__MM_MOVELDUP_PS)
endif(HAVE_INTRIN_H)
endif(HAVE_PMMINTRIN_H)
endif(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
else()
# TODO: Add detections for compiler support and headers
endif(NOT CMAKE_CROSSCOMPILING)
# restore flags
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
# compiler settings
if(MSVC)
# enable all warnings but also disable some..
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /W4 /wd4127")
# mark debug versions
set(CMAKE_DEBUG_POSTFIX "d")
add_definitions(-D_USE_MATH_DEFINES)
elseif(CMAKE_COMPILER_IS_GNUCC)
include(CheckCCompilerFlag)
include(CheckLibraryExists)
# enable all warnings
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra")
# check if we can control visibility of symbols
check_c_compiler_flag(-fvisibility=hidden HAVE_GCC_VISIBILITY)
if(HAVE_GCC_VISIBILITY)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden")
add_definitions(-DHAVE_GCC_VISIBILITY)
endif(HAVE_GCC_VISIBILITY)
# some systems need libm for the math functions to work
check_library_exists(m pow "" HAVE_LIBM)
if(HAVE_LIBM)
list(APPEND CMAKE_REQUIRED_LIBRARIES m)
list(APPEND FFTS_EXTRA_LIBRARIES m)
endif(HAVE_LIBM)
if(HAVE_PMMINTRIN_H)
add_definitions(-msse3)
elseif(HAVE_EMMINTRIN_H)
add_definitions(-msse2)
elseif(HAVE_XMMINTRIN_H)
add_definitions(-msse)
endif(HAVE_PMMINTRIN_H)
endif(MSVC)
include_directories(include)
include_directories(src)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
set(FFTS_HEADERS
include/ffts.h
)
set(FFTS_SOURCES
src/ffts_attributes.h
src/ffts.c
src/ffts_internal.h
src/ffts_nd.c
src/ffts_nd.h
src/ffts_real.h
src/ffts_real.c
src/ffts_real_nd.c
src/ffts_real_nd.h
src/ffts_transpose.c
src/ffts_transpose.h
src/ffts_trig.c
src/ffts_trig.h
src/ffts_static.c
src/ffts_static.h
src/macros.h
src/patterns.h
src/types.h
)
if(ENABLE_NEON)
list(APPEND FFTS_SOURCES
src/neon.s
)
if(DISABLE_DYNAMIC_CODE)
list(APPEND FFTS_SOURCES
src/neon_static.s
)
endif(DISABLE_DYNAMIC_CODE)
add_definitions(-DHAVE_NEON)
elseif(ENABLE_VFP)
if(NOT DISABLE_DYNAMIC_CODE)
list(APPEND FFTS_SOURCES
src/vfp.s
)
endif(NOT DISABLE_DYNAMIC_CODE)
add_definitions(-DHAVE_VFP)
elseif(HAVE_XMMINTRIN_H)
add_definitions(-DHAVE_SSE)
list(APPEND FFTS_SOURCES
src/macros-sse.h
)
if(NOT DISABLE_DYNAMIC_CODE)
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
list(APPEND FFTS_SOURCES
src/codegen_sse.h
)
else()
message(WARNING "Dynamic code is only supported with x64, disabling dynamic code.")
set(DISABLE_DYNAMIC_CODE ON)
endif(CMAKE_SIZEOF_VOID_P EQUAL 8)
endif(NOT DISABLE_DYNAMIC_CODE)
endif(ENABLE_NEON)
if(DISABLE_DYNAMIC_CODE)
add_definitions(-DDYNAMIC_DISABLED)
else()
list(APPEND FFTS_SOURCES
src/codegen.c
src/codegen.h
)
endif(DISABLE_DYNAMIC_CODE)
if(GENERATE_POSITION_INDEPENDENT_CODE)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
endif(GENERATE_POSITION_INDEPENDENT_CODE)
if(ENABLE_SHARED)
add_library(ffts_shared SHARED
${FFTS_HEADERS}
${FFTS_SOURCES}
)
# On unix-like platforms the library is called "libffts.so" and on Windows "ffts.dll"
set_target_properties(ffts_shared PROPERTIES
DEFINE_SYMBOL FFTS_SHARED
OUTPUT_NAME ffts
VERSION ${FFTS_MAJOR}.${FFTS_MINOR}.${FFTS_MICRO}
)
install( TARGETS ffts_shared DESTINATION ${LIB_INSTALL_DIR} )
endif(ENABLE_SHARED)
if(ENABLE_STATIC)
add_library(ffts_static STATIC
${FFTS_HEADERS}
${FFTS_SOURCES}
)
if(UNIX)
# On unix-like platforms the library is called "libffts.a"
set_target_properties(ffts_static PROPERTIES OUTPUT_NAME ffts)
endif(UNIX)
install( TARGETS ffts_static DESTINATION ${LIB_INSTALL_DIR} )
endif(ENABLE_STATIC)
if(ENABLE_STATIC OR ENABLE_SHARED)
add_executable(ffts_test
tests/test.c
)
# link with static library by default
if(ENABLE_STATIC)
add_library(ffts ALIAS ffts_static)
else()
add_library(ffts ALIAS ffts_shared)
endif(ENABLE_STATIC)
target_link_libraries(ffts_test
ffts
${FFTS_EXTRA_LIBRARIES}
)
endif(ENABLE_STATIC OR ENABLE_SHARED)
# generate packageconfig file
if(UNIX)
include(FindPkgConfig QUIET)
if(PKG_CONFIG_FOUND)
# convert lists of link libraries into -lstdc++ -lm etc..
foreach(LIB ${CMAKE_CXX_IMPLICIT_LINK_LIBRARIES} ${PLATFORM_LIBS})
set(PRIVATE_LIBS "${PRIVATE_LIBS} -l${LIB}")
endforeach()
# Produce a pkg-config file for linking against the shared lib
configure_file("ffts.pc.cmake.in" "ffts.pc" @ONLY)
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/ffts.pc"
DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
endif(PKG_CONFIG_FOUND)
endif(UNIX)
install( FILES
${FFTS_HEADERS}
DESTINATION ${INCLUDE_INSTALL_DIR} )