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# Copyright (c) 2021 Google LLC.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
# Generate the config.h to compile with specific intrinsics / libs.
# Check for compiler options.
include(CheckCSourceCompiles)
check_c_source_compiles("
int main(void) {
(void)__builtin_bswap16(0);
return 0;
}
" HAVE_BUILTIN_BSWAP16)
check_c_source_compiles("
int main(void) {
(void)__builtin_bswap32(0);
return 0;
}
" HAVE_BUILTIN_BSWAP32)
check_c_source_compiles("
int main(void) {
(void)__builtin_bswap64(0);
return 0;
}
" HAVE_BUILTIN_BSWAP64)
# Check for libraries.
if(WEBP_USE_THREAD)
find_package(Threads)
if(Threads_FOUND)
# work around cmake bug on QNX (https://cmake.org/Bug/view.php?id=11333)
if(CMAKE_USE_PTHREADS_INIT AND NOT CMAKE_SYSTEM_NAME STREQUAL "QNX")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pthread")
endif()
check_c_source_compiles("
#include <pthread.h>
int main (void) {
int attr = PTHREAD_PRIO_INHERIT;
return attr;
}
" FLAG_HAVE_PTHREAD_PRIO_INHERIT)
set(HAVE_PTHREAD_PRIO_INHERIT ${FLAG_HAVE_PTHREAD_PRIO_INHERIT})
list(APPEND WEBP_DEP_LIBRARIES Threads::Threads)
endif()
set(WEBP_USE_THREAD ${Threads_FOUND})
endif()
# TODO: this seems unused, check with autotools.
set(LT_OBJDIR ".libs/")
# Only useful for vwebp, so useless for now.
find_package(OpenGL)
set(WEBP_HAVE_GL ${OPENGL_FOUND})
# Check if we need to link to the C math library. We do not look for it as it is
# not found when cross-compiling, while it is here.
check_c_source_compiles("
#include <math.h>
int main(int argc, char** argv) {
return (int)pow(argc, 2.5);
}
" HAVE_MATH_LIBRARY)
if(NOT HAVE_MATH_LIBRARY)
message(STATUS "Adding -lm flag.")
list(APPEND WEBP_DEP_LIBRARIES m)
endif()
# Find the standard image libraries.
set(WEBP_DEP_IMG_LIBRARIES)
set(WEBP_DEP_IMG_INCLUDE_DIRS)
foreach(I_LIB PNG JPEG TIFF)
# Disable tiff when compiling in static mode as it is failing on Ubuntu.
if(WEBP_LINK_STATIC AND ${I_LIB} STREQUAL "TIFF")
message("TIFF is disabled when statically linking.")
continue()
endif()
find_package(${I_LIB})
set(WEBP_HAVE_${I_LIB} ${${I_LIB}_FOUND})
if(${I_LIB}_FOUND)
list(APPEND WEBP_DEP_IMG_LIBRARIES ${${I_LIB}_LIBRARIES})
list(APPEND WEBP_DEP_IMG_INCLUDE_DIRS ${${I_LIB}_INCLUDE_DIR}
${${I_LIB}_INCLUDE_DIRS})
endif()
endforeach()
if(WEBP_DEP_IMG_INCLUDE_DIRS)
list(REMOVE_DUPLICATES WEBP_DEP_IMG_INCLUDE_DIRS)
endif()
# GIF detection, gifdec isn't part of the imageio lib.
include(CMakePushCheckState)
set(WEBP_DEP_GIF_LIBRARIES)
set(WEBP_DEP_GIF_INCLUDE_DIRS)
find_package(GIF)
set(WEBP_HAVE_GIF ${GIF_FOUND})
if(GIF_FOUND)
# GIF find_package only locates the header and library, it doesn't fail
# compile tests when detecting the version, but falls back to 3 (as of at
# least cmake 3.7.2). Make sure the library links to avoid incorrect detection
# when cross compiling.
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${GIF_LIBRARIES})
set(CMAKE_REQUIRED_INCLUDES ${GIF_INCLUDE_DIR})
check_c_source_compiles("
#include <gif_lib.h>
int main(void) {
(void)DGifOpenFileHandle;
return 0;
}
" GIF_COMPILES)
cmake_pop_check_state()
if(GIF_COMPILES)
list(APPEND WEBP_DEP_GIF_LIBRARIES ${GIF_LIBRARIES})
list(APPEND WEBP_DEP_GIF_INCLUDE_DIRS ${GIF_INCLUDE_DIR})
else()
unset(GIF_FOUND)
endif()
endif()
# Check for specific headers.
include(CheckIncludeFiles)
check_include_files("stdlib.h;stdarg.h;string.h;float.h" STDC_HEADERS)
check_include_files(dlfcn.h HAVE_DLFCN_H)
check_include_files(GLUT/glut.h HAVE_GLUT_GLUT_H)
check_include_files(GL/glut.h HAVE_GL_GLUT_H)
check_include_files(inttypes.h HAVE_INTTYPES_H)
check_include_files(memory.h HAVE_MEMORY_H)
check_include_files(OpenGL/glut.h HAVE_OPENGL_GLUT_H)
check_include_files(shlwapi.h HAVE_SHLWAPI_H)
check_include_files(stdint.h HAVE_STDINT_H)
check_include_files(stdlib.h HAVE_STDLIB_H)
check_include_files(strings.h HAVE_STRINGS_H)
check_include_files(string.h HAVE_STRING_H)
check_include_files(sys/stat.h HAVE_SYS_STAT_H)
check_include_files(sys/types.h HAVE_SYS_TYPES_H)
check_include_files(unistd.h HAVE_UNISTD_H)
check_include_files(wincodec.h HAVE_WINCODEC_H)
check_include_files(windows.h HAVE_WINDOWS_H)
# Windows specifics
if(HAVE_WINCODEC_H)
list(APPEND WEBP_DEP_LIBRARIES
shlwapi
ole32
windowscodecs)
endif()
# Check for SIMD extensions.
include(${CMAKE_CURRENT_LIST_DIR}/cpu.cmake)
# Define extra info.
set(PACKAGE ${PROJECT_NAME})
set(PACKAGE_NAME ${PROJECT_NAME})
# Read from configure.ac.
file(READ ${CMAKE_CURRENT_SOURCE_DIR}/configure.ac CONFIGURE_AC)
string(REGEX MATCHALL
"\\[([0-9a-z\\.:/]*)\\]"
CONFIGURE_AC_PACKAGE_INFO
${CONFIGURE_AC})
function(strip_bracket VAR)
string(LENGTH ${${VAR}} TMP_LEN)
math(EXPR TMP_LEN ${TMP_LEN}-2)
string(SUBSTRING ${${VAR}}
1
${TMP_LEN}
TMP_SUB)
set(${VAR} ${TMP_SUB} PARENT_SCOPE)
endfunction()
list(GET CONFIGURE_AC_PACKAGE_INFO 1 PACKAGE_VERSION)
strip_bracket(PACKAGE_VERSION)
list(GET CONFIGURE_AC_PACKAGE_INFO 2 PACKAGE_BUGREPORT)
strip_bracket(PACKAGE_BUGREPORT)
list(GET CONFIGURE_AC_PACKAGE_INFO 3 PACKAGE_URL)
strip_bracket(PACKAGE_URL)
# Build more info.
set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
set(PACKAGE_TARNAME ${PACKAGE_NAME})
set(VERSION ${PACKAGE_VERSION})
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