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xz/cmake/tuklib_common.cmake

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Add SPDX license identifier into 0BSD source code files.
2024-02-12 17:09:10 +02:00
# SPDX-License-Identifier: 0BSD
#############################################################################
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
#
# tuklib_common.cmake - common functions and macros for tuklib_*.cmake files
#
# Author: Lasse Collin
#
Add SPDX license identifier into 0BSD source code files.
2024-02-12 17:09:10 +02:00
#############################################################################
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
function(tuklib_add_definitions TARGET_OR_ALL DEFINITIONS)
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 20:42:31 +02:00
# DEFINITIONS may be an empty string/list but it's fine here. There is
# no need to quote ${DEFINITIONS} as empty arguments are fine here.
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
if(TARGET_OR_ALL STREQUAL "ALL")
add_compile_definitions(${DEFINITIONS})
else()
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 20:42:31 +02:00
target_compile_definitions("${TARGET_OR_ALL}" PRIVATE ${DEFINITIONS})
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
endif()
endfunction()
function(tuklib_add_definition_if TARGET_OR_ALL VAR)
if(${VAR})
Build: Fix bugs in the CMake files. Seems that the phrase "add more quotes" from sh/bash scripting applies to CMake as well. E.g. passing an unquoted list ${FOO} to a function that expects one argument results in only the first element of the list being passed as an argument and the rest get ignored. Adding quotes helps ("${FOO}"). list(INSERT ...) is weird. Inserting an empty string to an empty variable results in empty list, but inserting it to a non-empty variable does insert an empty element to the list. Since INSERT requires at least one element, "${CMAKE_THREAD_LIBS_INIT}" needs to be quoted in CMakeLists.txt. It might result in an empty element in the list. It seems to not matter as empty elements consistently get ignored in that variable. In fact, calling cmake_check_push_state() and cmake_check_pop_state() will strip the empty elements from CMAKE_REQUIRED_LIBRARIES! In addition to quoting fixes, this fixes checks for the cache variables in tuklib_cpucores.cmake and tuklib_physmem.cmake. Thanks to Martin Matuška for testing and reporting the problems. These fixes aren't tested yet but hopefully they soon will be.
2020-02-25 20:42:31 +02:00
tuklib_add_definitions("${TARGET_OR_ALL}" "${VAR}")
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
endif()
endfunction()
# This is an over-simplified version of AC_USE_SYSTEM_EXTENSIONS in Autoconf
# or gl_USE_SYSTEM_EXTENSIONS in gnulib.
CMake: Fix tuklib_use_system_extensions Revert back to a macro so that list(APPEND CMAKE_REQUIRED_DEFINITIONS) will affect the calling scope. I had forgotten that while CMake functions inherit the variables from the parent scope, the changes to them are local unless using set(... PARENT_SCOPE). This also means that the commit message in 5bb77d0920dc is wrong. The commit itself is still fine, making it clearer that -DHAVE_SYS_PARAM_H is only needed for specific check_c_source_compiles() calls. Fixes: c1ea7bd0b60eed6ebcdf9a713ca69034f6f07179
2025-03-10 13:13:30 +02:00
#
# NOTE: This is a macro because the changes to CMAKE_REQUIRED_DEFINITIONS
# must be visible in the calling scope.
macro(tuklib_use_system_extensions)
CMake: Revise tuklib_use_system_extensions Define NetBSD and Darwin/macOS feature test macros. Autoconf defines these too (and a few others). Define the macros on Windows except with MSVC. The _GNU_SOURCE macro makes a difference with mingw-w64. Use a function instead of a macro. Don't take the TARGET_OR_ALL argument because there's always global effect because the global variable CMAKE_REQUIRED_DEFINITIONS is modified.
2025-03-09 14:06:35 +02:00
if(NOT MSVC)
add_compile_definitions(
_GNU_SOURCE # glibc, musl, mingw-w64
_NETBSD_SOURCE # NetBSD, MINIX 3
_OPENBSD_SOURCE # Also NetBSD!
__EXTENSIONS__ # Solaris
_POSIX_PTHREAD_SEMANTICS # Solaris
_DARWIN_C_SOURCE # macOS
_TANDEM_SOURCE # HP NonStop
_ALL_SOURCE # AIX, z/OS
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
)
list(APPEND CMAKE_REQUIRED_DEFINITIONS
-D_GNU_SOURCE
CMake: Revise tuklib_use_system_extensions Define NetBSD and Darwin/macOS feature test macros. Autoconf defines these too (and a few others). Define the macros on Windows except with MSVC. The _GNU_SOURCE macro makes a difference with mingw-w64. Use a function instead of a macro. Don't take the TARGET_OR_ALL argument because there's always global effect because the global variable CMAKE_REQUIRED_DEFINITIONS is modified.
2025-03-09 14:06:35 +02:00
-D_NETBSD_SOURCE
-D_OPENBSD_SOURCE
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
-D__EXTENSIONS__
-D_POSIX_PTHREAD_SEMANTICS
CMake: Revise tuklib_use_system_extensions Define NetBSD and Darwin/macOS feature test macros. Autoconf defines these too (and a few others). Define the macros on Windows except with MSVC. The _GNU_SOURCE macro makes a difference with mingw-w64. Use a function instead of a macro. Don't take the TARGET_OR_ALL argument because there's always global effect because the global variable CMAKE_REQUIRED_DEFINITIONS is modified.
2025-03-09 14:06:35 +02:00
-D_DARWIN_C_SOURCE
Build: Add very limited experimental CMake support. This does *NOT* replace the Autotools-based build system in the foreseeable future. See the comment in the beginning of CMakeLists.txt. So far this has been tested only on GNU/Linux but I commit it anyway to make it easier for others to test. Since I haven't played much with CMake before, it's likely that there are things that have been done in a silly or wrong way and need to be fixed.
2020-02-24 23:38:16 +02:00
-D_TANDEM_SOURCE
-D_ALL_SOURCE
)
endif()
CMake: Fix tuklib_use_system_extensions Revert back to a macro so that list(APPEND CMAKE_REQUIRED_DEFINITIONS) will affect the calling scope. I had forgotten that while CMake functions inherit the variables from the parent scope, the changes to them are local unless using set(... PARENT_SCOPE). This also means that the commit message in 5bb77d0920dc is wrong. The commit itself is still fine, making it clearer that -DHAVE_SYS_PARAM_H is only needed for specific check_c_source_compiles() calls. Fixes: c1ea7bd0b60eed6ebcdf9a713ca69034f6f07179
2025-03-10 13:13:30 +02:00
endmacro()
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