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c1ea7bd0b6
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.
54 lines
1.7 KiB
CMake
54 lines
1.7 KiB
CMake
# SPDX-License-Identifier: 0BSD
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#############################################################################
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#
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# tuklib_common.cmake - common functions and macros for tuklib_*.cmake files
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#
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# Author: Lasse Collin
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#
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#############################################################################
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function(tuklib_add_definitions TARGET_OR_ALL DEFINITIONS)
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# DEFINITIONS may be an empty string/list but it's fine here. There is
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# no need to quote ${DEFINITIONS} as empty arguments are fine here.
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if(TARGET_OR_ALL STREQUAL "ALL")
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add_compile_definitions(${DEFINITIONS})
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else()
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target_compile_definitions("${TARGET_OR_ALL}" PRIVATE ${DEFINITIONS})
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endif()
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endfunction()
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function(tuklib_add_definition_if TARGET_OR_ALL VAR)
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if(${VAR})
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tuklib_add_definitions("${TARGET_OR_ALL}" "${VAR}")
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endif()
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endfunction()
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# This is an over-simplified version of AC_USE_SYSTEM_EXTENSIONS in Autoconf
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# or gl_USE_SYSTEM_EXTENSIONS in gnulib.
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function(tuklib_use_system_extensions)
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if(NOT MSVC)
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add_compile_definitions(
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_GNU_SOURCE # glibc, musl, mingw-w64
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_NETBSD_SOURCE # NetBSD, MINIX 3
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_OPENBSD_SOURCE # Also NetBSD!
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__EXTENSIONS__ # Solaris
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_POSIX_PTHREAD_SEMANTICS # Solaris
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_DARWIN_C_SOURCE # macOS
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_TANDEM_SOURCE # HP NonStop
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_ALL_SOURCE # AIX, z/OS
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)
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list(APPEND CMAKE_REQUIRED_DEFINITIONS
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-D_GNU_SOURCE
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-D_NETBSD_SOURCE
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-D_OPENBSD_SOURCE
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-D__EXTENSIONS__
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-D_POSIX_PTHREAD_SEMANTICS
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-D_DARWIN_C_SOURCE
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-D_TANDEM_SOURCE
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-D_ALL_SOURCE
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)
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endif()
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endfunction()
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