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fish-shell/cmake/ConfigureChecks.cmake
David Adam 45633f4a54 cmake: force C++11 in CHECK_CXX_SOURCE_COMPILES for atomic 
GCC 4.8 requires the use of `-std=gnu++11` or similar to enable atomic
features. However, older versions of CMake don't pick up the
project-wide target for C++11 when building the configure check targets.
Although CMake policy 0067 could be set to NEW to enable this, it only
exists on CMake 3.8 and newer, while many of our supported platforms are
on an older version.
2019-12-21 22:00:22 +08:00

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# The following defines affect the environment configuration tests are run in:
# CMAKE_REQUIRED_DEFINITIONS, CMAKE_REQUIRED_FLAGS, CMAKE_REQUIRED_LIBRARIES,
# and CMAKE_REQUIRED_INCLUDES
# `wcstod_l` is a GNU-extension, sometimes hidden behind GNU-related defines.
# This is the case for at least Cygwin and Newlib.
LIST(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE=1)
IF(APPLE)
INCLUDE(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-Werror=unguarded-availability" REQUIRES_UNGUARDED_AVAILABILITY)
IF(REQUIRES_UNGUARDED_AVAILABILITY)
LIST(APPEND CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Werror=unguarded-availability")
ENDIF()
ENDIF()
# Try using CMake's own logic to locate curses/ncurses
FIND_PACKAGE(Curses)
IF(NOT ${CURSES_FOUND})
# CMake has trouble finding platform-specific system libraries
# installed to multiarch paths (e.g. /usr/lib/x86_64-linux-gnu)
# if not symlinked or passed in as a manual define.
MESSAGE("Falling back to pkg-config for (n)curses detection")
INCLUDE(FindPkgConfig)
PKG_SEARCH_MODULE(CURSES REQUIRED ncurses curses)
SET(CURSES_CURSES_LIBRARY ${CURSES_LIBRARIES})
SET(CURSES_LIBRARY ${CURSES_LIBRARIES})
ENDIF()
# Get threads.
set(THREADS_PREFER_PTHREAD_FLAG ON)
# FindThreads < 3.4.0 doesn't work for C++-only projects
IF(CMAKE_VERSION VERSION_LESS 3.4.0)
ENABLE_LANGUAGE(C)
ENDIF()
FIND_PACKAGE(Threads REQUIRED)
# Detect WSL. Does not match against native Windows/WIN32.
if (CMAKE_HOST_SYSTEM_VERSION MATCHES ".*-Microsoft")
SET(WSL 1)
endif()
# Set up the config.h file.
SET(PACKAGE_NAME "fish")
SET(PACKAGE_TARNAME "fish")
INCLUDE(CheckCXXSymbolExists)
INCLUDE(CheckIncludeFileCXX)
INCLUDE(CheckIncludeFiles)
INCLUDE(CheckStructHasMember)
INCLUDE(CheckCXXSourceCompiles)
INCLUDE(CheckTypeSize)
INCLUDE(CMakePushCheckState)
CHECK_CXX_SYMBOL_EXISTS(backtrace_symbols execinfo.h HAVE_BACKTRACE_SYMBOLS)
CHECK_CXX_SYMBOL_EXISTS(clock_gettime time.h HAVE_CLOCK_GETTIME)
CHECK_CXX_SYMBOL_EXISTS(ctermid_r stdio.h HAVE_CTERMID_R)
CHECK_STRUCT_HAS_MEMBER("struct dirent" d_type dirent.h HAVE_STRUCT_DIRENT_D_TYPE LANGUAGE CXX)
CHECK_CXX_SYMBOL_EXISTS(dirfd "sys/types.h;dirent.h" HAVE_DIRFD)
CHECK_INCLUDE_FILE_CXX(execinfo.h HAVE_EXECINFO_H)
CHECK_CXX_SYMBOL_EXISTS(flock sys/file.h HAVE_FLOCK)
# futimens is new in OS X 10.13 but is a weak symbol.
# Don't assume it exists just because we can link - it may be null.
CHECK_CXX_SYMBOL_EXISTS(futimens sys/stat.h HAVE_FUTIMENS)
CHECK_CXX_SYMBOL_EXISTS(futimes sys/time.h HAVE_FUTIMES)
CHECK_CXX_SYMBOL_EXISTS(getifaddrs ifaddrs.h HAVE_GETIFADDRS)
CHECK_CXX_SYMBOL_EXISTS(getpwent pwd.h HAVE_GETPWENT)
CHECK_CXX_SYMBOL_EXISTS(getrusage sys/resource.h HAVE_GETRUSAGE)
CHECK_CXX_SYMBOL_EXISTS(gettext libintl.h HAVE_GETTEXT)
CHECK_CXX_SYMBOL_EXISTS(killpg "sys/types.h;signal.h" HAVE_KILLPG)
CHECK_CXX_SYMBOL_EXISTS(lrand48_r stdlib.h HAVE_LRAND48_R)
# mkostemp is in stdlib in glibc and FreeBSD, but unistd on macOS
CHECK_CXX_SYMBOL_EXISTS(mkostemp "stdlib.h;unistd.h" HAVE_MKOSTEMP)
SET(HAVE_CURSES_H ${CURSES_HAVE_CURSES_H})
SET(HAVE_NCURSES_CURSES_H ${CURSES_HAVE_NCURSES_CURSES_H})
SET(HAVE_NCURSES_H ${CURSES_HAVE_NCURSES_H})
IF(HAVE_CURSES_H)
CHECK_INCLUDE_FILES("curses.h;term.h" HAVE_TERM_H)
ENDIF()
IF(NOT HAVE_TERM_H)
CHECK_INCLUDE_FILE_CXX("ncurses/term.h" HAVE_NCURSES_TERM_H)
ENDIF()
CHECK_INCLUDE_FILE_CXX(siginfo.h HAVE_SIGINFO_H)
CHECK_INCLUDE_FILE_CXX(spawn.h HAVE_SPAWN_H)
CHECK_STRUCT_HAS_MEMBER("struct stat" st_ctime_nsec "sys/stat.h" HAVE_STRUCT_STAT_ST_CTIME_NSEC
LANGUAGE CXX)
CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtimespec.tv_nsec "sys/stat.h"
HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC LANGUAGE CXX)
CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtim.tv_nsec "sys/stat.h" HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
LANGUAGE CXX)
CHECK_CXX_SYMBOL_EXISTS(sys_errlist stdio.h HAVE_SYS_ERRLIST)
CHECK_INCLUDE_FILE_CXX(sys/ioctl.h HAVE_SYS_IOCTL_H)
CHECK_INCLUDE_FILE_CXX(sys/select.h HAVE_SYS_SELECT_H)
CHECK_INCLUDE_FILES("sys/types.h;sys/sysctl.h" HAVE_SYS_SYSCTL_H)
CHECK_INCLUDE_FILE_CXX(termios.h HAVE_TERMIOS_H) # Needed for TIOCGWINSZ
CHECK_CXX_SYMBOL_EXISTS(wcscasecmp wchar.h HAVE_WCSCASECMP)
CHECK_CXX_SYMBOL_EXISTS(wcsdup wchar.h HAVE_WCSDUP)
CHECK_CXX_SYMBOL_EXISTS(wcslcpy wchar.h HAVE_WCSLCPY)
CHECK_CXX_SYMBOL_EXISTS(wcsncasecmp wchar.h HAVE_WCSNCASECMP)
CHECK_CXX_SYMBOL_EXISTS(wcsndup wchar.h HAVE_WCSNDUP)
# These are for compatibility with Solaris 10, which places the following
# in the std namespace.
IF(NOT HAVE_WCSNCASECMP)
CHECK_CXX_SYMBOL_EXISTS(std::wcscasecmp wchar.h HAVE_STD__WCSCASECMP)
ENDIF()
IF(NOT HAVE_WCSDUP)
CHECK_CXX_SYMBOL_EXISTS(std::wcsdup wchar.h HAVE_STD__WCSDUP)
ENDIF()
IF(NOT HAVE_WCSNCASECMP)
CHECK_CXX_SYMBOL_EXISTS(std::wcsncasecmp wchar.h HAVE_STD__WCSNCASECMP)
ENDIF()
# `xlocale.h` is required to find `wcstod_l` in `wchar.h` under FreeBSD,
# but it's not present under Linux.
CHECK_INCLUDE_FILES("xlocale.h" HAVE_XLOCALE_H)
IF(HAVE_XLOCALE_H)
LIST(APPEND WCSTOD_L_INCLUDES "xlocale.h")
ENDIF()
LIST(APPEND WCSTOD_L_INCLUDES "wchar.h")
CHECK_CXX_SYMBOL_EXISTS(wcstod_l "${WCSTOD_L_INCLUDES}" HAVE_WCSTOD_L)
CHECK_CXX_SYMBOL_EXISTS(_sys_errs stdlib.h HAVE__SYS__ERRS)
CMAKE_PUSH_CHECK_STATE()
SET(CMAKE_EXTRA_INCLUDE_FILES termios.h sys/ioctl.h)
CHECK_TYPE_SIZE("struct winsize" STRUCT_WINSIZE LANGUAGE CXX)
CHECK_CXX_SYMBOL_EXISTS("TIOCGWINSZ" "termios.h;sys/ioctl.h" HAVE_TIOCGWINSZ)
IF(STRUCT_WINSIZE GREATER -1 AND HAVE_TIOCGWINSZ EQUAL 1)
SET(HAVE_WINSIZE 1)
ENDIF()
CMAKE_POP_CHECK_STATE()
CHECK_TYPE_SIZE("wchar_t[8]" WCHAR_T_BITS LANGUAGE CXX)
# Solaris, NetBSD and X/Open-conforming systems have a fixed-args tparm
SET(TPARM_INCLUDES)
IF(HAVE_NCURSES_H)
SET(TPARM_INCLUDES "${TPARM_INCLUDES}#include <ncurses.h>\n")
ELSEIF(HAVE_NCURSES_CURSES_H)
SET(TPARM_INCLUDES "${TPARM_INCLUDES}#include <ncurses/curses.h>\n")
ELSE()
SET(TPARM_INCLUDES "${TPARM_INCLUDES}#include <curses.h>\n")
ENDIF()
IF(HAVE_TERM_H)
SET(TPARM_INCLUDES "${TPARM_INCLUDES}#include <term.h>\n")
ELSEIF(HAVE_NCURSES_TERM_H)
SET(TPARM_INCLUDES "${TPARM_INCLUDES}#include <ncurses/term.h>\n")
ENDIF()
CMAKE_PUSH_CHECK_STATE()
LIST(APPEND CMAKE_REQUIRED_LIBRARIES ${CURSES_LIBRARY})
CHECK_CXX_SOURCE_COMPILES("
${TPARM_INCLUDES}
int main () {
tparm( \"\" );
}
"
TPARM_TAKES_VARARGS
)
IF(NOT TPARM_TAKES_VARARGS)
CHECK_CXX_SOURCE_COMPILES("
${TPARM_INCLUDES}
#define TPARM_VARARGS
int main () {
tparm( \"\" );
}
"
TPARM_TAKES_VARARGS_WITH_VARARGS
)
IF(NOT TPARM_TAKES_VARARGS)
SET(TPARM_SOLARIS_KLUDGE 1)
ELSE()
SET(TPARM_VARARGS 1)
ENDIF()
ENDIF()
CMAKE_POP_CHECK_STATE()
CHECK_CXX_SOURCE_COMPILES("
#include <memory>
int main () {
std::unique_ptr<int> foo = std::make_unique<int>();
}
"
HAVE_STD__MAKE_UNIQUE
)
FIND_PROGRAM(SED sed)
# https://github.com/fish-shell/fish-shell/issues/5865
CMAKE_PUSH_CHECK_STATE()
# Needed until CMP0067 is set to NEW
# g++ 4.8 needs -std=gnu+11 set to enable atomic features, but CMake < 3.8 does not add that
# flag to TRY_COMPILE targets even when set for the project
IF(CMAKE_COMPILER_IS_GNUCXX)
LIST(APPEND CMAKE_REQUIRED_FLAGS "-std=gnu++11")
ENDIF()
CHECK_CXX_SOURCE_COMPILES("
#include <atomic>
#include <cstdint>
std::atomic<uint64_t> x;
int main() {
return x;
}"
LIBATOMIC_NOT_NEEDED)
IF (NOT LIBATOMIC_NOT_NEEDED)
SET(ATOMIC_LIBRARY "atomic")
ENDIF()
CMAKE_POP_CHECK_STATE()
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