1# CMake support for LZ4 2# 3# To the extent possible under law, the author(s) have dedicated all 4# copyright and related and neighboring rights to this software to 5# the public domain worldwide. This software is distributed without 6# any warranty. 7# 8# For details, see <http://creativecommons.org/publicdomain/zero/1.0/>. 9# 10# LZ4's CMake support is maintained by Evan Nemerson; when filing 11# bugs please mention @nemequ to make sure I see it. 12 13set(LZ4_TOP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..") 14 15option(LZ4_BUILD_CLI "Build lz4 program" ON) 16option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c progam with legacy argument support" ON) 17 18# Parse version information 19file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MAJOR REGEX "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$") 20string(REGEX REPLACE "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MAJOR "${LZ4_VERSION_MAJOR}") 21file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MINOR REGEX "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$") 22string(REGEX REPLACE "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MINOR "${LZ4_VERSION_MINOR}") 23file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_RELEASE REGEX "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$") 24string(REGEX REPLACE "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$" "\\1" LZ4_VERSION_RELEASE "${LZ4_VERSION_RELEASE}") 25set(LZ4_VERSION_STRING "${LZ4_VERSION_MAJOR}.${LZ4_VERSION_MINOR}.${LZ4_VERSION_RELEASE}") 26mark_as_advanced(LZ4_VERSION_STRING LZ4_VERSION_MAJOR LZ4_VERSION_MINOR LZ4_VERSION_RELEASE) 27 28if("${CMAKE_VERSION}" VERSION_LESS "3.0") 29 project(LZ4 C) 30else() 31 cmake_policy (SET CMP0048 NEW) 32 project(LZ4 33 VERSION ${LZ4_VERSION_STRING} 34 LANGUAGES C) 35endif() 36 37cmake_minimum_required (VERSION 2.8.6) 38 39# If LZ4 is being bundled in another project, we don't want to 40# install anything. However, we want to let people override this, so 41# we'll use the LZ4_BUNDLED_MODE variable to let them do that; just 42# set it to OFF in your project before you add_subdirectory(lz4/contrib/cmake_unofficial). 43get_directory_property(LZ4_PARENT_DIRECTORY PARENT_DIRECTORY) 44if("${LZ4_BUNDLED_MODE}" STREQUAL "") 45 # Bundled mode hasn't been set one way or the other, set the default 46 # depending on whether or not we are the top-level project. 47 if("${LZ4_PARENT_DIRECTORY}" STREQUAL "") 48 set(LZ4_BUNDLED_MODE OFF) 49 else() 50 set(LZ4_BUNDLED_MODE ON) 51 endif() 52endif() 53mark_as_advanced(LZ4_BUNDLED_MODE) 54 55# CPack 56if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED) 57 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LZ4 compression library") 58 set(CPACK_PACKAGE_DESCRIPTION_FILE "${LZ4_TOP_SOURCE_DIR}/README.md") 59 set(CPACK_RESOURCE_FILE_LICENSE "${LZ4_TOP_SOURCE_DIR}/LICENSE") 60 set(CPACK_PACKAGE_VERSION_MAJOR ${LZ4_VERSION_MAJOR}) 61 set(CPACK_PACKAGE_VERSION_MINOR ${LZ4_VERSION_MINOR}) 62 set(CPACK_PACKAGE_VERSION_PATCH ${LZ4_VERSION_RELEASE}) 63 include(CPack) 64endif(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED) 65 66# Allow people to choose whether to build shared or static libraries 67# via the BUILD_SHARED_LIBS option unless we are in bundled mode, in 68# which case we always use static libraries. 69include(CMakeDependentOption) 70CMAKE_DEPENDENT_OPTION(BUILD_SHARED_LIBS "Build shared libraries" ON "NOT LZ4_BUNDLED_MODE" OFF) 71CMAKE_DEPENDENT_OPTION(BUILD_STATIC_LIBS "Build static libraries" OFF "BUILD_SHARED_LIBS" ON) 72 73if(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS) 74 message(FATAL_ERROR "Both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS have been disabled") 75endif() 76 77set(LZ4_LIB_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/lib") 78set(LZ4_PROG_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/programs") 79 80include_directories("${LZ4_LIB_SOURCE_DIR}") 81 82# CLI sources 83set(LZ4_SOURCES 84 "${LZ4_LIB_SOURCE_DIR}/lz4.c" 85 "${LZ4_LIB_SOURCE_DIR}/lz4hc.c" 86 "${LZ4_LIB_SOURCE_DIR}/lz4.h" 87 "${LZ4_LIB_SOURCE_DIR}/lz4hc.h" 88 "${LZ4_LIB_SOURCE_DIR}/lz4frame.c" 89 "${LZ4_LIB_SOURCE_DIR}/lz4frame.h" 90 "${LZ4_LIB_SOURCE_DIR}/xxhash.c") 91set(LZ4_CLI_SOURCES 92 "${LZ4_PROG_SOURCE_DIR}/bench.c" 93 "${LZ4_PROG_SOURCE_DIR}/lz4cli.c" 94 "${LZ4_PROG_SOURCE_DIR}/lz4io.c" 95 "${LZ4_PROG_SOURCE_DIR}/datagen.c") 96 97# Whether to use position independent code for the static library. If 98# we're building a shared library this is ignored and PIC is always 99# used. 100option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ON) 101 102# liblz4 103set(LZ4_LIBRARIES_BUILT) 104if(BUILD_SHARED_LIBS) 105 add_library(lz4_shared SHARED ${LZ4_SOURCES}) 106 set_target_properties(lz4_shared PROPERTIES 107 OUTPUT_NAME lz4 108 SOVERSION "${LZ4_VERSION_MAJOR}" 109 VERSION "${LZ4_VERSION_STRING}") 110 if(MSVC) 111 target_compile_definitions(lz4_shared PRIVATE 112 LZ4_DLL_EXPORT=1) 113 endif() 114 list(APPEND LZ4_LIBRARIES_BUILT lz4_shared) 115endif() 116if(BUILD_STATIC_LIBS) 117 add_library(lz4_static STATIC ${LZ4_SOURCES}) 118 set_target_properties(lz4_static PROPERTIES 119 OUTPUT_NAME lz4 120 POSITION_INDEPENDENT_CODE ${LZ4_POSITION_INDEPENDENT_LIB}) 121 list(APPEND LZ4_LIBRARIES_BUILT lz4_static) 122endif() 123 124# link to shared whenever possible, to static otherwise 125if(BUILD_SHARED_LIBS) 126 set(LZ4_LINK_LIBRARY lz4_shared) 127else() 128 set(LZ4_LINK_LIBRARY lz4_static) 129endif() 130 131# lz4 132if (LZ4_BUILD_CLI) 133 set(LZ4_PROGRAMS_BUILT lz4cli) 134 add_executable(lz4cli ${LZ4_CLI_SOURCES}) 135 set_target_properties(lz4cli PROPERTIES OUTPUT_NAME lz4) 136 target_link_libraries(lz4cli ${LZ4_LINK_LIBRARY}) 137endif() 138 139# lz4c 140if (LZ4_BUILD_LEGACY_LZ4C) 141 list(APPEND LZ4_PROGRAMS_BUILT lz4c) 142 add_executable(lz4c ${LZ4_CLI_SOURCES}) 143 set_target_properties(lz4c PROPERTIES COMPILE_DEFINITIONS "ENABLE_LZ4C_LEGACY_OPTIONS") 144 target_link_libraries(lz4c ${LZ4_LINK_LIBRARY}) 145endif() 146 147# Extra warning flags 148include (CheckCCompilerFlag) 149foreach (flag 150 # GCC-style 151 -Wall 152 -Wextra 153 -Wundef 154 -Wcast-qual 155 -Wcast-align 156 -Wshadow 157 -Wswitch-enum 158 -Wdeclaration-after-statement 159 -Wstrict-prototypes 160 -Wpointer-arith 161 162 # MSVC-style 163 /W4) 164 # Because https://gcc.gnu.org/wiki/FAQ#wnowarning 165 string(REGEX REPLACE "\\-Wno\\-(.+)" "-W\\1" flag_to_test "${flag}") 166 string(REGEX REPLACE "[^a-zA-Z0-9]+" "_" test_name "CFLAG_${flag_to_test}") 167 168 check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name}) 169 170 if(${test_name}) 171 set(CMAKE_C_FLAGS "${flag} ${CMAKE_C_FLAGS}") 172 endif() 173 174 unset(test_name) 175 unset(flag_to_test) 176endforeach (flag) 177 178if(NOT LZ4_BUNDLED_MODE) 179 include(GNUInstallDirs) 180 181 install(TARGETS ${LZ4_PROGRAMS_BUILT} 182 BUNDLE DESTINATION "${CMAKE_INSTALL_BINDIR}" 183 RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}") 184 install(TARGETS ${LZ4_LIBRARIES_BUILT} 185 LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" 186 ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" 187 RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}") 188 install(FILES 189 "${LZ4_LIB_SOURCE_DIR}/lz4.h" 190 "${LZ4_LIB_SOURCE_DIR}/lz4frame.h" 191 "${LZ4_LIB_SOURCE_DIR}/lz4hc.h" 192 DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}") 193 install(FILES "${LZ4_PROG_SOURCE_DIR}/lz4.1" 194 DESTINATION "${CMAKE_INSTALL_MANDIR}/man1") 195 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblz4.pc" 196 DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig") 197 198 # install lz4cat and unlz4 symlinks on *nix 199 if(UNIX AND LZ4_BUILD_CLI) 200 install(CODE " 201 foreach(f lz4cat unlz4) 202 set(dest \"\$ENV{DESTDIR}${CMAKE_INSTALL_FULL_BINDIR}/\${f}\") 203 message(STATUS \"Symlinking: \${dest} -> lz4\") 204 execute_process( 205 COMMAND \"${CMAKE_COMMAND}\" -E create_symlink lz4 \"\${dest}\") 206 endforeach() 207 ") 208 209 # create manpage aliases 210 foreach(f lz4cat unlz4) 211 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/${f}.1" ".so man1/lz4.1\n") 212 install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${f}.1" 213 DESTINATION "${CMAKE_INSTALL_MANDIR}/man1") 214 endforeach() 215 endif(UNIX AND LZ4_BUILD_CLI) 216endif(NOT LZ4_BUNDLED_MODE) 217 218# pkg-config 219set(PREFIX "${CMAKE_INSTALL_PREFIX}") 220 221if("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}") 222 set(LIBDIR "\${prefix}/${CMAKE_INSTALL_LIBDIR}") 223else() 224 set(LIBDIR "${CMAKE_INSTALL_FULL_LIBDIR}") 225endif() 226 227if("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}") 228 set(INCLUDEDIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}") 229else() 230 set(INCLUDEDIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}") 231endif() 232 233# for liblz4.pc substitution 234set(VERSION ${LZ4_VERSION_STRING}) 235configure_file(${LZ4_LIB_SOURCE_DIR}/liblz4.pc.in liblz4.pc @ONLY) 236