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dbus/cmake/ConfigureChecks.cmake
Simon McVittie ccea70515e sysdeps: On Linux, wrap close_range syscall directly if necessary 
This was added to the Linux kernel in version 5.9, but the wrapper
wasn't added to glibc until 2.34. Adding our own wrapper for the
system call means we can use close_range() on Debian 11 and
contemporary distributions.

Signed-off-by: Simon McVittie <smcv@collabora.com>
2022-04-21 11:02:44 +01:00

230 lines
8.8 KiB
CMake
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include(CheckIncludeFile)
include(CheckIncludeFiles)
include(CheckSymbolExists)
include(CheckStructMember)
include(CheckTypeSize)
include(CheckCSourceCompiles)
include(CheckCSourceRuns)
check_include_file(alloca.h HAVE_ALLOCA_H)
check_include_file(byteswap.h HAVE_BYTESWAP_H)
check_include_file(crt/externs.h HAVE_CRT_EXTERNS_H)
check_include_file(dirent.h HAVE_DIRENT_H) # dbus-sysdeps-util.c
check_include_file(dlfcn.h HAVE_DLFCN_H)
check_include_file(execinfo.h HAVE_EXECINFO_H)
check_include_file(errno.h HAVE_ERRNO_H) # dbus-sysdeps.c
check_include_file(expat.h HAVE_EXPAT_H)
check_include_file(grp.h HAVE_GRP_H) # dbus-sysdeps-util-win.c
check_include_file(inttypes.h HAVE_INTTYPES_H) # dbus-pipe.h
check_include_file(io.h HAVE_IO_H) # internal
check_include_file(linux/close_range.h HAVE_LINUX_CLOSE_RANGE_H)
check_include_file(locale.h HAVE_LOCALE_H)
check_include_file(memory.h HAVE_MEMORY_H)
check_include_file(signal.h HAVE_SIGNAL_H)
check_include_file(stdint.h HAVE_STDINT_H) # dbus-pipe.h
check_include_file(stdlib.h HAVE_STDLIB_H)
check_include_file(stdio.h HAVE_STDIO_H) # dbus-sysdeps.h
check_include_file(string.h HAVE_STRING_H)
check_include_file(strings.h HAVE_STRINGS_H)
check_include_file(syslog.h HAVE_SYSLOG_H)
check_include_files("stdint.h;sys/types.h;sys/event.h" HAVE_SYS_EVENT_H)
check_include_file(sys/inotify.h HAVE_SYS_INOTIFY_H)
check_include_file(sys/random.h HAVE_SYS_RANDOM_H)
check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
check_include_file(sys/stat.h HAVE_SYS_STAT_H)
check_include_file(sys/syscall.h HAVE_SYS_SYSCALL_H)
check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file(sys/uio.h HAVE_SYS_UIO_H)
check_include_file(sys/prctl.h HAVE_SYS_PRCTL_H)
check_include_file(sys/syslimits.h HAVE_SYS_SYSLIMITS_H) # dbus-sysdeps-unix.c
check_include_file(sys/time.h HAVE_SYS_TIME_H)# dbus-sysdeps-win.c
check_include_file(sys/wait.h HAVE_SYS_WAIT_H)# dbus-sysdeps-win.c
check_include_file(time.h HAVE_TIME_H) # dbus-sysdeps-win.c
check_include_file(ws2tcpip.h HAVE_WS2TCPIP_H)# dbus-sysdeps-win.c
check_include_file(unistd.h HAVE_UNISTD_H) # dbus-sysdeps-util-win.c
check_include_file(sys/inotify.h DBUS_BUS_ENABLE_INOTIFY)
find_package(Backtrace) # dbus-sysdeps.c, dbus-sysdeps-win.c
set(HAVE_BACKTRACE ${Backtrace_FOUND})
check_symbol_exists(getgrouplist "grp.h" HAVE_GETGROUPLIST) # dbus-sysdeps.c
check_symbol_exists(getpeerucred "ucred.h" HAVE_GETPEERUCRED) # dbus-sysdeps.c, dbus-sysdeps-win.c
check_symbol_exists(nanosleep "time.h" HAVE_NANOSLEEP) # dbus-sysdeps.c
check_symbol_exists(getpwnam_r "errno.h;pwd.h" HAVE_GETPWNAM_R) # dbus-sysdeps-util-unix.c
check_symbol_exists(setenv "stdlib.h" HAVE_SETENV) # dbus-sysdeps.c
check_symbol_exists(unsetenv "stdlib.h" HAVE_UNSETENV) # dbus-sysdeps.c
check_symbol_exists(clearenv "stdlib.h" HAVE_CLEARENV) # dbus-sysdeps.c
check_symbol_exists(closefrom "unistd.h" HAVE_CLOSEFROM) # dbus-sysdeps-unix.c
check_symbol_exists(close_range "unistd.h" HAVE_CLOSE_RANGE) # dbus-sysdeps-unix.c
check_symbol_exists(writev "sys/uio.h" HAVE_WRITEV) # dbus-sysdeps.c, dbus-sysdeps-win.c
check_symbol_exists(setrlimit "sys/resource.h" HAVE_SETRLIMIT) # dbus-sysdeps.c, dbus-sysdeps-win.c, test/test-segfault.c
check_symbol_exists(socketpair "sys/socket.h" HAVE_SOCKETPAIR) # dbus-sysdeps.c
check_symbol_exists(setlocale "locale.h" HAVE_SETLOCALE) # dbus-test-main.c
check_symbol_exists(localeconv "locale.h" HAVE_LOCALECONV) # dbus-sysdeps.c
check_symbol_exists(poll "poll.h" HAVE_POLL) # dbus-sysdeps-unix.c
check_symbol_exists(strtoll "stdlib.h" HAVE_STRTOLL) # dbus-send.c
check_symbol_exists(strtoull "stdlib.h" HAVE_STRTOULL) # dbus-send.c
set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
check_symbol_exists(pipe2 "fcntl.h;unistd.h" HAVE_PIPE2)
check_symbol_exists(accept4 "sys/socket.h" HAVE_ACCEPT4)
check_symbol_exists(inotify_init1 "sys/inotify.h" HAVE_INOTIFY_INIT1)
check_symbol_exists(SCM_RIGHTS "sys/types.h;sys/socket.h;sys/un.h" HAVE_UNIX_FD_PASSING)
check_symbol_exists(prctl "sys/prctl.h" HAVE_PRCTL)
check_symbol_exists(raise "signal.h" HAVE_RAISE)
check_symbol_exists(getrandom "sys/random.h" HAVE_GETRANDOM)
check_symbol_exists(getrlimit "sys/resource.h;sys/time.h" HAVE_GETRLIMIT)
check_symbol_exists(prlimit "sys/resource.h;sys/time.h" HAVE_PRLIMIT)
check_symbol_exists(setrlimit "sys/resource.h;sys/time.h" HAVE_SETRLIMIT)
check_symbol_exists(vasprintf "stdio.h" HAVE_VASPRINTF)
check_symbol_exists(vsnprintf "stdio.h" HAVE_VSNPRINTF)
check_symbol_exists(MSG_NOSIGNAL "sys/socket.h" HAVE_DECL_MSG_NOSIGNAL)
check_symbol_exists(environ "unistd.h" HAVE_DECL_ENVIRON)
check_symbol_exists(LOG_PERROR "syslog.h" HAVE_DECL_LOG_PERROR)
check_struct_member(cmsgcred cmcred_pid "sys/types.h;sys/socket.h" HAVE_CMSGCRED) # dbus-sysdeps.c
CHECK_C_SOURCE_COMPILES("
#ifndef __linux__
#error This is not Linux
#endif
#include <sys/epoll.h>
int main() {
epoll_create1 (EPOLL_CLOEXEC);
}" DBUS_HAVE_LINUX_EPOLL)
CHECK_C_SOURCE_COMPILES("
#include <stdarg.h>
#include <stdlib.h>
static void f (int i, ...) {
va_list args1, args2;
va_start (args1, i);
va_copy (args2, args1);
if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
exit (1);
va_end (args1); va_end (args2);
}
int main() {
f (0, 42);
return 0;
}
" HAVE_VA_COPY)
CHECK_C_SOURCE_COMPILES("
#include <stdarg.h>
#include <stdlib.h>
static void f (int i, ...) {
va_list args1, args2;
va_start (args1, i);
__va_copy (args2, args1);
if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
exit (1);
va_end (args1); va_end (args2);
}
int main() {
f (0, 42);
return 0;
}
" HAVE___VA_COPY)
if(HAVE_VA_COPY)
set(DBUS_VA_COPY va_copy CACHE STRING "va_copy function")
elseif(HAVE___VA_COPY)
set(DBUS_VA_COPY __va_copy CACHE STRING "va_copy function")
elseif(MSVC)
# this is used for msvc < 2013
set(DBUS_VA_COPY _DBUS_VA_COPY_ASSIGN)
else()
message(FATAL_ERROR "dbus requires an ISO C99-compatible va_copy() macro, or a similar __va_copy(), or MSVC >= 2010")
endif()
CHECK_C_SOURCE_COMPILES("
int main() {
int a = 4;
int b = __sync_sub_and_fetch(&a, 4);
exit(b);
}
" DBUS_USE_SYNC)
CHECK_C_SOURCE_COMPILES("
#include <sys/types.h>
#include <dirent.h>
int main(
DIR *dirp;
dirp = opendir(\".\");
dirfd(dirp);
closedir(dirp);
)
" HAVE_DIRFD)
if(NOT HAVE_DIRFD)
CHECK_C_SOURCE_COMPILES("
#include <sys/types.h>
#include <dirent.h>
int main()
{
DIR *dirp;
int fd;
dirp = opendir(\".\");
fd = dirp->dd_fd;
closedir(dirp);
}
" HAVE_DDFD)
endif()
check_type_size("short" SIZEOF_SHORT)
check_type_size("int" SIZEOF_INT)
check_type_size("long" SIZEOF_LONG)
check_type_size("long long" SIZEOF_LONG_LONG)
check_type_size("__int64" SIZEOF___INT64)
set(CMAKE_EXTRA_INCLUDE_FILES "sys/socket.h")
check_type_size("socklen_t" HAVE_SOCKLEN_T) # dbus-sysdeps-unix.c
set(CMAKE_EXTRA_INCLUDE_FILES)
# DBUS_INT64_TYPE
if(SIZEOF_INT EQUAL 8)
set(DBUS_INT64_TYPE "int")
set(DBUS_INT64_CONSTANT "(val)")
set(DBUS_UINT64_CONSTANT "(val##U)")
set(DBUS_INT64_MODIFIER "")
elseif(SIZEOF_LONG EQUAL 8)
set(DBUS_INT64_TYPE "long")
set(DBUS_INT64_CONSTANT "(val##L)")
set(DBUS_UINT64_CONSTANT "(val##UL)")
set(DBUS_INT64_MODIFIER "l")
elseif(SIZEOF_LONG_LONG EQUAL 8)
set(DBUS_INT64_TYPE "long long")
set(DBUS_INT64_CONSTANT "(val##LL)")
set(DBUS_UINT64_CONSTANT "(val##ULL)")
set(DBUS_INT64_MODIFIER "ll")
elseif(SIZEOF___INT64 EQUAL 8)
set(DBUS_INT64_TYPE "__int64")
set(DBUS_INT64_CONSTANT "(val##i64)")
set(DBUS_UINT64_CONSTANT "(val##ui64)")
set(DBUS_INT64_MODIFIER "I64")
else(SIZEOF_INT EQUAL 8)
message(FATAL_ERROR "Could not find a 64-bit integer type")
endif()
# MSVCRT.dll printf() doesn't support %lld
if(WIN32 AND NOT CYGWIN)
set(DBUS_INT64_MODIFIER "I64")
endif()
# DBUS_INT32_TYPE
if(SIZEOF_INT EQUAL 4)
set(DBUS_INT32_TYPE "int")
elseif(SIZEOF_LONG EQUAL 4)
set(DBUS_INT32_TYPE "long")
elseif(SIZEOF_LONG_LONG EQUAL 4)
set(DBUS_INT32_TYPE "long long")
endif()
# DBUS_INT16_TYPE
if(SIZEOF_INT EQUAL 2)
set(DBUS_INT16_TYPE "int")
elseif(SIZEOF_SHORT EQUAL 2)
set(DBUS_INT16_TYPE "short")
endif()
find_program(DOXYGEN doxygen)
find_program(XMLTO xmlto)
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