| # - Use compat library providing various functions and macros that may be missing on some systems |
| # Once done this will define |
| # |
| # compatsrc - sources to add to compilation |
| # |
| # Additionally, "compat.h" include directory is added and can be included. |
| # |
| # Author Michal Vasko <mvasko@cesnet.cz> |
| # Copyright (c) 2021 - 2023 CESNET, z.s.p.o. |
| # |
| # This source code is licensed under BSD 3-Clause License (the "License"). |
| # You may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # https://opensource.org/licenses/BSD-3-Clause |
| # |
| include(CheckSymbolExists) |
| include(CheckIncludeFile) |
| include(TestBigEndian) |
| if(POLICY CMP0075) |
| cmake_policy(SET CMP0075 NEW) |
| endif() |
| |
| macro(USE_COMPAT) |
| # compatibility checks |
| set(CMAKE_REQUIRED_DEFINITIONS -D_POSIX_C_SOURCE=200809L) |
| list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE) |
| list(APPEND CMAKE_REQUIRED_DEFINITIONS -D__BSD_VISIBLE=1) |
| set(CMAKE_REQUIRED_LIBRARIES pthread) |
| |
| check_symbol_exists(_POSIX_TIMERS "unistd.h" HAVE_CLOCK) |
| if(NOT HAVE_CLOCK) |
| message(FATAL_ERROR "Missing support for clock_gettime() and similar functions!") |
| endif() |
| |
| check_symbol_exists(pthread_mutex_timedlock "pthread.h" HAVE_PTHREAD_MUTEX_TIMEDLOCK) |
| check_symbol_exists(pthread_mutex_clocklock "pthread.h" HAVE_PTHREAD_MUTEX_CLOCKLOCK) |
| check_symbol_exists(pthread_rwlock_timedrdlock "pthread.h" HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK) |
| check_symbol_exists(pthread_rwlock_clockrdlock "pthread.h" HAVE_PTHREAD_RWLOCK_CLOCKRDLOCK) |
| check_symbol_exists(pthread_rwlock_timedwrlock "pthread.h" HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK) |
| check_symbol_exists(pthread_rwlock_clockwrlock "pthread.h" HAVE_PTHREAD_RWLOCK_CLOCKWRLOCK) |
| check_symbol_exists(pthread_cond_clockwait "pthread.h" HAVE_PTHREAD_COND_CLOCKWAIT) |
| if(HAVE_PTHREAD_MUTEX_CLOCKLOCK) |
| # can use CLOCK_MONOTONIC only if we have pthread_mutex_clocklock() |
| check_symbol_exists(_POSIX_MONOTONIC_CLOCK "unistd.h" HAVE_CLOCK_MONOTONIC) |
| endif() |
| if(HAVE_CLOCK_MONOTONIC) |
| set(COMPAT_CLOCK_ID "CLOCK_MONOTONIC") |
| else() |
| set(COMPAT_CLOCK_ID "CLOCK_REALTIME") |
| endif() |
| |
| check_symbol_exists(vdprintf "stdio.h;stdarg.h" HAVE_VDPRINTF) |
| check_symbol_exists(asprintf "stdio.h" HAVE_ASPRINTF) |
| check_symbol_exists(vasprintf "stdio.h" HAVE_VASPRINTF) |
| check_symbol_exists(getline "stdio.h" HAVE_GETLINE) |
| |
| check_symbol_exists(strndup "string.h" HAVE_STRNDUP) |
| check_symbol_exists(strnstr "string.h" HAVE_STRNSTR) |
| check_symbol_exists(strdupa "string.h" HAVE_STRDUPA) |
| check_symbol_exists(strchrnul "string.h" HAVE_STRCHRNUL) |
| |
| check_symbol_exists(get_current_dir_name "unistd.h" HAVE_GET_CURRENT_DIR_NAME) |
| |
| check_function_exists(timegm HAVE_TIMEGM) |
| |
| # crypt |
| check_include_file("crypt.h" HAVE_CRYPT_H) |
| |
| if(${CMAKE_SYSTEM_NAME} MATCHES "QNX") |
| list(APPEND CMAKE_REQUIRED_LIBRARIES -llogin) |
| elseif(NOT APPLE) |
| list(APPEND CMAKE_REQUIRED_LIBRARIES -lcrypt) |
| endif() |
| check_symbol_exists(crypt_r "crypt.h" HAVE_CRYPT_R) |
| |
| TEST_BIG_ENDIAN(IS_BIG_ENDIAN) |
| |
| check_include_file("stdatomic.h" HAVE_STDATOMIC) |
| |
| unset(CMAKE_REQUIRED_DEFINITIONS) |
| unset(CMAKE_REQUIRED_LIBRARIES) |
| |
| # header and source file (adding the source directly allows for hiding its symbols) |
| configure_file(${PROJECT_SOURCE_DIR}/compat/compat.h.in ${PROJECT_BINARY_DIR}/compat/compat.h @ONLY) |
| include_directories(${PROJECT_BINARY_DIR}/compat) |
| set(compatsrc ${PROJECT_SOURCE_DIR}/compat/compat.c) |
| endmacro() |