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CMake: Require CMake 3.20 or later 

This allows a few cleanups.
This commit is contained in:
Lasse Collin 2024-07-06 15:13:19 +03:00
parent 028185dd48
commit 9231c39ffb
1 changed files with 27 additions and 51 deletions
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76
CMakeLists.txt
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@ -4,19 +4,17 @@
# #
# CMake support for building XZ Utils # CMake support for building XZ Utils
# #
# CMake 3.20 or later is recommended. Older versions down to 3.14 work # Requirements:
# too with the following limitations:
# #
# - Translations aren't supported. # - CMake 3.20 or later
# #
# - Generated liblzma.pc won't be relocatable. # - To get translated messages, install GNU gettext tools (the command
# msgfmt is needed). Alternatively disable translations by setting
# XZ_NLS=OFF.
# #
# To get translated messages, install GNU gettext tools (the command msgfmt # - If building from xz.git instead of a release tarball: To generate
# is needed). Alternatively disable translations by setting XZ_NLS=OFF. # translated man pages, run po4a/update-po which requires the po4a
# # tool. The build works without this step too.
# If building from xz.git instead of a release tarball: To generate
# translated man pages, run po4a/update-po which requires the po4a tool.
# The build works without this step too.
# #
# About CMAKE_BUILD_TYPE: # About CMAKE_BUILD_TYPE:
# #
@ -79,8 +77,7 @@
# #
############################################################################# #############################################################################
# NOTE: Translation support is disabled with CMake older than 3.20. cmake_minimum_required(VERSION 3.20...3.29 FATAL_ERROR)
cmake_minimum_required(VERSION 3.14...3.29 FATAL_ERROR)
include(CMakePushCheckState) include(CMakePushCheckState)
include(CheckIncludeFile) include(CheckIncludeFile)
@ -286,7 +283,7 @@ if(NOT HAVE_CLOCK_GETTIME)
# With glibc <= 2.17 or Solaris 10 this needs librt. # With glibc <= 2.17 or Solaris 10 this needs librt.
# Add librt for the next check for HAVE_CLOCK_GETTIME. If it is # Add librt for the next check for HAVE_CLOCK_GETTIME. If it is
# found after including the library, we know that librt is required. # found after including the library, we know that librt is required.
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 rt) list(PREPEND CMAKE_REQUIRED_LIBRARIES rt)
check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME_LIBRT) check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME_LIBRT)
# If it was found now, add librt to all targets and keep it in # If it was found now, add librt to all targets and keep it in
@ -295,7 +292,7 @@ if(NOT HAVE_CLOCK_GETTIME)
link_libraries(rt) link_libraries(rt)
set(LIBS "-lrt ${LIBS}") # For liblzma.pc set(LIBS "-lrt ${LIBS}") # For liblzma.pc
else() else()
list(REMOVE_AT CMAKE_REQUIRED_LIBRARIES 0) list(POP_FRONT CMAKE_REQUIRED_LIBRARIES)
endif() endif()
endif() endif()
@ -308,31 +305,19 @@ if(HAVE_CLOCK_GETTIME OR HAVE_CLOCK_GETTIME_LIBRT)
endif() endif()
# Translation support requires CMake 3.20 because it added the Intl::Intl
# target so we don't need to play with the individual variables.
#
# The definition ENABLE_NLS is added only to those targets that use it, thus # The definition ENABLE_NLS is added only to those targets that use it, thus
# it's not done here. (xz has translations, xzdec doesn't.) # it's not done here. (xz has translations, xzdec doesn't.)
set(XZ_NLS_DEFAULT OFF) set(XZ_NLS_DEFAULT OFF)
if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20") find_package(Intl)
find_package(Intl) find_package(Gettext)
find_package(Gettext) if(Intl_FOUND AND GETTEXT_FOUND)
if(Intl_FOUND AND GETTEXT_FOUND)
set(XZ_NLS_DEFAULT ON) set(XZ_NLS_DEFAULT ON)
endif()
endif() endif()
option(XZ_NLS "Native Language Support (translated messages and man pages)" option(XZ_NLS "Native Language Support (translated messages and man pages)"
"${XZ_NLS_DEFAULT}") "${XZ_NLS_DEFAULT}")
if(XZ_NLS) if(XZ_NLS)
if(CMAKE_VERSION VERSION_LESS "3.20")
message(FATAL_ERROR "Native language support (NLS) requires "
"CMake >= 3.20. "
"Upgrade to a newer CMake or set XZ_NLS=OFF.")
endif()
if(NOT Intl_FOUND) if(NOT Intl_FOUND)
message(FATAL_ERROR "Native language support (NLS) was enabled but " message(FATAL_ERROR "Native language support (NLS) was enabled but "
"find_package(Intl) failed. " "find_package(Intl) failed. "
@ -647,7 +632,7 @@ if(XZ_THREADS)
# Make the thread libs available in later checks. In practice # Make the thread libs available in later checks. In practice
# only pthread_condattr_setclock check should need this. # only pthread_condattr_setclock check should need this.
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}") list(PREPEND CMAKE_REQUIRED_LIBRARIES "${CMAKE_THREAD_LIBS_INIT}")
# Check if pthread_condattr_setclock() exists to # Check if pthread_condattr_setclock() exists to
# use CLOCK_MONOTONIC. # use CLOCK_MONOTONIC.
@ -833,9 +818,9 @@ if("sha256" IN_LIST XZ_CHECKS)
else() else()
# Try with libmd. Other checks don't need it so we # Try with libmd. Other checks don't need it so we
# don't need to leave it into CMAKE_REQUIRED_LIBRARIES. # don't need to leave it into CMAKE_REQUIRED_LIBRARIES.
list(INSERT CMAKE_REQUIRED_LIBRARIES 0 md) list(PREPEND CMAKE_REQUIRED_LIBRARIES md)
check_c_source_compiles("${SOURCE}" "${HAVE_X}_LIBMD") check_c_source_compiles("${SOURCE}" "${HAVE_X}_LIBMD")
list(REMOVE_AT CMAKE_REQUIRED_LIBRARIES 0) list(POP_FRONT CMAKE_REQUIRED_LIBRARIES)
if(${HAVE_X}_LIBMD) if(${HAVE_X}_LIBMD)
# NOTE: Just "${HAVE_X}", not "${HAVE_X}_LIBMD": # NOTE: Just "${HAVE_X}", not "${HAVE_X}_LIBMD":
target_compile_definitions(liblzma PRIVATE target_compile_definitions(liblzma PRIVATE
@ -1534,20 +1519,14 @@ file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config.cmake"
"${LZMA_CONFIG_CONTENTS}") "${LZMA_CONFIG_CONTENTS}")
# Create liblzma.pc. If using CMake >= 3.20 and CMAKE_INSTALL_<dir> paths # Create liblzma.pc. If CMAKE_INSTALL_<dir> paths are relative to
# are relative to CMAKE_INSTALL_PREFIX, the .pc file will be relocatable # CMAKE_INSTALL_PREFIX, the .pc file will be relocatable (that is,
# (that is, all paths will be relative to ${prefix}). Otherwise absolute # all paths will be relative to ${prefix}). Otherwise absolute
# paths will be used. # paths will be used.
set(prefix "${CMAKE_INSTALL_PREFIX}") set(prefix "${CMAKE_INSTALL_PREFIX}")
set(exec_prefix "\${prefix}") set(exec_prefix "\${prefix}")
cmake_path(APPEND libdir "\${exec_prefix}" "${CMAKE_INSTALL_LIBDIR}")
if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20") cmake_path(APPEND includedir "\${prefix}" "${CMAKE_INSTALL_INCLUDEDIR}")
cmake_path(APPEND libdir "\${exec_prefix}" "${CMAKE_INSTALL_LIBDIR}")
cmake_path(APPEND includedir "\${prefix}" "${CMAKE_INSTALL_INCLUDEDIR}")
else()
set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
endif()
# Threads::Threads is linked in only when using POSIX threads. # Threads::Threads is linked in only when using POSIX threads.
# Use an empty value if using Windows threads or if threading is disabled. # Use an empty value if using Windows threads or if threading is disabled.
@ -2263,7 +2242,10 @@ xzdiff, xzgrep, xzmore, xzless, and their symlinks" ON)
foreach(S xzdiff xzgrep xzmore xzless) foreach(S xzdiff xzgrep xzmore xzless)
configure_file("src/scripts/${S}.in" "${S}" configure_file("src/scripts/${S}.in" "${S}"
@ONLY @ONLY
NEWLINE_STYLE LF) NEWLINE_STYLE LF
FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
GROUP_READ GROUP_EXECUTE
WORLD_READ WORLD_EXECUTE)
if(ENABLE_SCRIPTS) if(ENABLE_SCRIPTS)
install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/${S}" install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/${S}"
@ -2272,12 +2254,6 @@ xzdiff, xzgrep, xzmore, xzless, and their symlinks" ON)
endif() endif()
endforeach() endforeach()
# file(CHMOD ...) would need CMake 3.19 so use execute_process instead.
# Using +x is fine even if umask was 077. If execute bit is set at all
# then "make install" will set it for group and other access bits too.
execute_process(COMMAND chmod +x xzdiff xzgrep xzmore xzless
WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
unset(xz) unset(xz)
unset(POSIX_SHELL) unset(POSIX_SHELL)
unset(enable_path_for_scripts) unset(enable_path_for_scripts)