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libevent/configure.ac
Cœur b456e4bd82
Use arc4random_stir over deprecated arc4random_addrandom (#1631) 
Co-authored-by: Azat Khuzhin <azat@libevent.org>
2024-10-26 20:46:41 +02:00

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dnl Copyright 2000-2007 Niels Provos
dnl Copyright 2007-2012 Niels Provos and Nick Mathewson
dnl
dnl See LICENSE for copying information.
dnl
dnl Original version Dug Song <dugsong@monkey.org>
AC_PREREQ([2.67])
AC_INIT(libevent,2.2.1-alpha-dev)
AC_CONFIG_SRCDIR(event.c)
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR([build-aux])
dnl Automake setup
dnl 'foreign' means that GNU package rules are not strictly enforced.
AM_INIT_AUTOMAKE([1.13 foreign subdir-objects])
dnl make compilation quiet unless V=1 is used
AM_SILENT_RULES([yes])
AC_CONFIG_HEADERS(config.h evconfig-private.h:evconfig-private.h.in)
dnl The last number is development version or not.
AC_DEFINE(NUMERIC_VERSION, 0x02020100, [Numeric representation of the version])
dnl Try and get a full POSIX environment on obscure systems
AC_USE_SYSTEM_EXTENSIONS
dnl the 'build' machine is where we run configure and compile
dnl the 'host' machine is where the resulting stuff runs.
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
dnl Checks for programs.
AM_PROG_CC_C_O
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_SED
AC_ARG_ENABLE([gcc-warnings],
AS_HELP_STRING([--disable-gcc-warnings, disable verbose warnings with GCC]))
AC_ARG_ENABLE([gcc-hardening],
AS_HELP_STRING([--enable-gcc-hardening, enable compiler security checks]),
[if test "$enableval" = "yes"; then
CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=3 -fstack-protector-all"
CFLAGS="$CFLAGS -fwrapv -fPIE -Wstack-protector"
CFLAGS="$CFLAGS --param ssp-buffer-size=1"
fi])
AC_ARG_ENABLE([thread-support],
AS_HELP_STRING([--disable-thread-support, disable support for threading]),
[], [enable_thread_support=yes])
AC_ARG_ENABLE([malloc-replacement],
AS_HELP_STRING([--disable-malloc-replacement, disable support for replacing the memory mgt functions]),
[], [enable_malloc_replacement=yes])
AC_ARG_ENABLE([openssl],
AS_HELP_STRING([--disable-openssl, disable support for openssl encryption]),
[], [enable_openssl=auto])
AC_ARG_ENABLE([mbedtls],
AS_HELP_STRING([--disable-mbedtls, disable support for mbedtls encryption]),
[], [enable_mbedtls=auto])
AC_ARG_ENABLE([debug-mode],
AS_HELP_STRING([--disable-debug-mode, disable support for running in debug mode]),
[], [enable_debug_mode=yes])
AC_ARG_ENABLE([libevent-install],
AS_HELP_STRING([--disable-libevent-install, disable installation of libevent]),
[], [enable_libevent_install=yes])
AC_ARG_ENABLE([libevent-regress],
AS_HELP_STRING([--disable-libevent-regress, skip regress in make check]),
[], [enable_libevent_regress=yes])
AC_ARG_ENABLE([samples],
AS_HELP_STRING([--disable-samples, skip building of sample programs]),
[], [enable_samples=yes])
AC_ARG_ENABLE([function-sections],
AS_HELP_STRING([--enable-function-sections, make static library allow smaller binaries with --gc-sections]),
[], [enable_function_sections=no])
AC_ARG_ENABLE([verbose-debug],
AS_HELP_STRING([--enable-verbose-debug, verbose debug logging]),
[], [enable_verbose_debug=no])
AC_ARG_ENABLE([clock-gettime],
AS_HELP_STRING([--disable-clock-gettime, do not use clock_gettime even if it is available]),
[], [enable_clock_gettime=yes])
LT_PREREQ([2.4.2])
LT_INIT
AC_SUBST(LIBTOOL_DEPS)
AM_CONDITIONAL([BUILD_SAMPLES], [test "$enable_samples" = "yes"])
AM_CONDITIONAL([BUILD_REGRESS], [test "$enable_libevent_regress" = "yes"])
dnl Checks for libraries.
AC_SEARCH_LIBS([inet_ntoa], [nsl])
AC_SEARCH_LIBS([socket], [socket])
AC_SEARCH_LIBS([inet_aton], [resolv])
if test "$enable_clock_gettime" = "yes"; then
AC_SEARCH_LIBS([clock_gettime], [rt])
AC_CHECK_FUNCS([clock_gettime])
fi
AC_SEARCH_LIBS([sendfile], [sendfile])
dnl - check if the macro _WIN32 is defined on this compiler.
dnl - (this is how we check for a windows compiler)
AC_MSG_CHECKING(for WIN32)
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],
[
#ifndef _WIN32
die horribly
#endif
]
)],
[bwin32=true; AC_MSG_RESULT(yes)],
[bwin32=false; AC_MSG_RESULT(no)]
)
dnl - check if the macro __midipix__ is defined on this compiler.
dnl - (this is how we check for a midipix version of GCC)
AC_MSG_CHECKING(for MIDIPIX)
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],
[
#ifndef __midipix__
die horribly
#endif
]
)],
[midipix=true; AC_MSG_RESULT(yes)],
[midipix=false; AC_MSG_RESULT(no)]
)
dnl - check if the macro __CYGWIN__ is defined on this compiler.
dnl - (this is how we check for a cygwin version of GCC)
AC_MSG_CHECKING(for CYGWIN)
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],
[
#ifndef __CYGWIN__
die horribly
#endif
]
)],
[cygwin=true; AC_MSG_RESULT(yes)],
[cygwin=false; AC_MSG_RESULT(no)]
)
AC_CHECK_HEADERS([zlib.h])
if test "$ac_cv_header_zlib_h" = "yes"; then
dnl Determine if we have zlib for regression tests
dnl Don't put this one in LIBS
save_LIBS="$LIBS"
LIBS=""
ZLIB_LIBS=""
have_zlib=no
AC_SEARCH_LIBS([inflateEnd], [z],
[have_zlib=yes
ZLIB_LIBS="$LIBS"
AC_DEFINE(HAVE_LIBZ, 1, [Define if the system has zlib])])
LIBS="$save_LIBS"
AC_SUBST(ZLIB_LIBS)
fi
AM_CONDITIONAL(ZLIB_REGRESS, [test "$have_zlib" = "yes"])
dnl See if we have openssl. This doesn't go in LIBS either.
if test "$bwin32" = "true"; then
EV_LIB_WS32=-lws2_32
EV_LIB_GDI=-lgdi32
else
EV_LIB_WS32=
EV_LIB_GDI=
fi
AC_SUBST(EV_LIB_WS32)
AC_SUBST(EV_LIB_GDI)
AC_SUBST(OPENSSL_LIBADD)
AC_SYS_LARGEFILE
LIBEVENT_OPENSSL
LIBEVENT_MBEDTLS
dnl Checks for header files.
AC_CHECK_HEADERS([arpa/inet.h fcntl.h ifaddrs.h mach/mach_time.h mach/mach.h netdb.h netinet/in.h netinet/in6.h netinet/tcp.h sys/un.h poll.h port.h stdarg.h stddef.h sys/devpoll.h sys/epoll.h sys/event.h sys/eventfd.h sys/ioctl.h sys/mman.h sys/param.h sys/queue.h sys/resource.h sys/select.h sys/sendfile.h sys/socket.h sys/stat.h sys/time.h sys/timerfd.h sys/signalfd.h sys/uio.h sys/wait.h sys/random.h errno.h afunix.h])
case "${host_os}" in
linux*) ;;
*)
AC_CHECK_HEADERS(sys/sysctl.h, [], [], [
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
])
esac
dnl if we have sys/time.h, check for timer* macros
if test "$ac_cv_header_sys_time_h" = "yes"; then
AC_MSG_CHECKING(for timeradd in sys/time.h)
AC_EGREP_CPP(yes, [
#include <sys/time.h>
#ifdef timeradd
yes
#endif],
[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_TIMERADD, 1, [Define if timeradd is defined in <sys/time.h>])],
[AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING(for timerclear in sys/time.h)
AC_EGREP_CPP(yes, [
#include <sys/time.h>
#ifdef timerclear
yes
#endif],
[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_TIMERCLEAR, 1, [Define if timerclear is defined in <sys/time.h>])],
[AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING(for timerisset in sys/time.h)
AC_EGREP_CPP(yes, [
#include <sys/time.h>
#ifdef timerisset
yes
#endif],
[AC_MSG_RESULT(yes); AC_DEFINE(HAVE_TIMERISSET, 1, [Define if timerisset is defined in <sys/time.h>])],
[AC_MSG_RESULT(no)]
)
fi
if test "$ac_cv_header_sys_sysctl_h" = "yes"; then
AC_CHECK_DECLS([CTL_KERN, KERN_ARND], [], [],
[[#include <sys/types.h>
#include <sys/sysctl.h>]]
)
fi
AM_CONDITIONAL(BUILD_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(BUILD_CYGWIN, test "$cygwin" = "true")
AM_CONDITIONAL(BUILD_MIDIPIX, test "$midipix" = "true")
AM_CONDITIONAL(BUILD_WITH_NO_UNDEFINED, test x$bwin32 = xtrue || test x$cygwin = xtrue || test x$midipix = xtrue)
if test "$bwin32" = "true"; then
AC_CHECK_LIB([ws2_32], [main])
AC_CHECK_LIB([iphlpapi], [GetAdaptersAddresses])
fi
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_INLINE
dnl Checks for library functions.
AC_CHECK_FUNCS([accept4 arc4random arc4random_buf arc4random_stir epoll_create1 epoll_pwait2 eventfd fcntl getegid geteuid getifaddrs getrandom gettimeofday issetugid mach_absolute_time mmap mmap64 nanosleep pipe pipe2 pread putenv sendfile setenv setrlimit sigaction signal socketpair strlcpy strsep strsignal strtok_r strtoll sysctl timerfd_create umask unsetenv usleep])
AS_IF([test "$bwin32" = "true"],
AC_CHECK_FUNCS(_gmtime64_s, , [AC_CHECK_FUNCS(_gmtime64)])
)
AM_CONDITIONAL(STRLCPY_IMPL, [test "$ac_cv_func_strlcpy" = "no"])
m4_define([funcstochk], [getnameinfo getprotobynumber getservbyname inet_ntop inet_pton])
AS_IF([test "$bwin32" = "true"],
[AX_CHECK_DECLS_EX([funcstochk getaddrinfo],
[#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#endif])],
[AC_CHECK_FUNCS(m4_normalize(funcstochk))]
)
m4_undefine([funcstochk])
dnl check getaddrinfo and gethostbyname_r for non-windows
AS_IF([test x$bwin32 = xfalse], [
AC_CACHE_CHECK(
[for getaddrinfo],
[libevent_cv_getaddrinfo],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
]],
[[
getaddrinfo;
]]
)],
[libevent_cv_getaddrinfo=yes],
[libevent_cv_getaddrinfo=no]
)]
)
if test "$libevent_cv_getaddrinfo" = "yes" ; then
AC_DEFINE([HAVE_GETADDRINFO], [1], [Do we have getaddrinfo()?])
else
dnl Check for gethostbyname_r in all its glorious incompatible versions.
dnl (This is cut-and-pasted from Tor, which based its logic on
dnl Python's configure.in.)
AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
[Define this if you have any gethostbyname_r()])
AC_CHECK_FUNC(gethostbyname_r, [
AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
OLD_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#include <netdb.h>
], [[
char *cp1, *cp2;
struct hostent *h1, *h2;
int i1, i2;
(void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
]])],[
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
[Define this if gethostbyname_r takes 6 arguments])
AC_MSG_RESULT(6)
], [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#include <netdb.h>
], [
char *cp1, *cp2;
struct hostent *h1;
int i1, i2;
(void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
])], [
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
[Define this if gethostbyname_r takes 5 arguments])
AC_MSG_RESULT(5)
], [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#include <netdb.h>
], [
char *cp1;
struct hostent *h1;
struct hostent_data hd;
(void) gethostbyname_r(cp1,h1,&hd);
])], [
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
[Define this if gethostbyname_r takes 3 arguments])
AC_MSG_RESULT(3)
], [
AC_MSG_RESULT(0)
])
])
])
CFLAGS=$OLD_CFLAGS
])
fi
]) dnl end of checking getaddrinfo and gethostbyname_r
AC_MSG_CHECKING(for F_SETFD in fcntl.h)
AC_EGREP_CPP(yes,
[
#define _GNU_SOURCE 1
#include <fcntl.h>
#ifdef F_SETFD
yes
#endif
], [ AC_DEFINE(HAVE_SETFD, 1,
[Define if F_SETFD is defined in <fcntl.h>])
AC_MSG_RESULT(yes) ], AC_MSG_RESULT(no))
needsignal=no
haveselect=no
if test "$bwin32" != "true"; then
AC_CHECK_FUNCS(select, [haveselect=yes], )
if test "$haveselect" = "yes" ; then
needsignal=yes
fi
fi
AM_CONDITIONAL(SELECT_BACKEND, [test "$haveselect" = "yes"])
havepoll=no
AC_CHECK_FUNCS(poll, [havepoll=yes], )
if test "$havepoll" = "yes" ; then
needsignal=yes
fi
AM_CONDITIONAL(POLL_BACKEND, [test "$havepoll" = "yes"])
havedevpoll=no
if test "$ac_cv_header_sys_devpoll_h" = "yes"; then
AC_DEFINE(HAVE_DEVPOLL, 1,
[Define if /dev/poll is available])
fi
AM_CONDITIONAL(DEVPOLL_BACKEND, [test "$ac_cv_header_sys_devpoll_h" = "yes"])
havekqueue=no
if test "$ac_cv_header_sys_event_h" = "yes"; then
AC_CHECK_FUNCS(kqueue, [havekqueue=yes], )
if test "$havekqueue" = "yes" ; then
AC_MSG_CHECKING(for working kqueue)
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/event.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
], [[
int kq;
int n;
int fd[2];
struct kevent ev;
struct timespec ts;
char buf[80000];
if (pipe(fd) == -1)
return 1;
if (fcntl(fd[1], F_SETFL, O_NONBLOCK) == -1)
return 1;
while ((n = write(fd[1], buf, sizeof(buf))) == sizeof(buf))
;
if ((kq = kqueue()) == -1)
return 1;
memset(&ev, 0, sizeof(ev));
ev.ident = fd[1];
ev.filter = EVFILT_WRITE;
ev.flags = EV_ADD | EV_ENABLE;
n = kevent(kq, &ev, 1, NULL, 0, NULL);
if (n == -1)
return 1;
read(fd[0], buf, sizeof(buf));
ts.tv_sec = 0;
ts.tv_nsec = 0;
n = kevent(kq, NULL, 0, &ev, 1, &ts);
if (n == -1 || n == 0)
return 1;
return 0;
]]
)],
[AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_WORKING_KQUEUE, 1,
[Define if kqueue works correctly with pipes])
havekqueue=yes
], [AC_MSG_RESULT(no)], [AC_MSG_RESULT(no)]
)
fi
fi
AM_CONDITIONAL(KQUEUE_BACKEND, [test "$havekqueue" = "yes"])
haveepollsyscall=no
haveepoll=no
AC_CHECK_FUNCS(epoll_ctl, [haveepoll=yes], )
if test "$haveepoll" = "yes" ; then
AC_DEFINE(HAVE_EPOLL, 1,
[Define if your system supports the epoll system calls])
needsignal=yes
fi
if test "$ac_cv_header_sys_epoll_h" = "yes"; then
if test "$haveepoll" = "no" ; then
AC_MSG_CHECKING(for epoll system call)
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdint.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/syscall.h>
#include <sys/epoll.h>
#include <unistd.h>
int
epoll_create(int size)
{
return (syscall(__NR_epoll_create, size));
}
]],[[
int epfd;
epfd = epoll_create(256);
return (epfd == -1 ? 1 : 0);
]]
)],
[AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_EPOLL, 1,
[Define if your system supports the epoll system calls])
needsignal=yes
have_epoll=yes
AC_LIBOBJ(epoll_sub)
], [AC_MSG_RESULT(no)], [AC_MSG_RESULT(no)]
)
fi
fi
AM_CONDITIONAL(EPOLL_BACKEND, [test "$haveepoll" = "yes"])
haveeventports=no
AC_CHECK_FUNCS(port_create, [haveeventports=yes], )
if test "$haveeventports" = "yes" ; then
AC_DEFINE(HAVE_EVENT_PORTS, 1,
[Define if your system supports event ports])
needsignal=yes
fi
AM_CONDITIONAL(EVPORT_BACKEND, [test "$haveeventports" = "yes"])
havewepoll=no
if test "$bwin32" = "true"; then
needsignal=yes
if test "$cygwin" = "false"; then
havewepoll=yes
AC_DEFINE(HAVE_WEPOLL, 1,
[Define if your system supports the wepoll module])
fi
fi
AM_CONDITIONAL(WEPOLL_BACKEND, [test "$havewepoll" = "yes"])
AM_CONDITIONAL(SIGNAL_SUPPORT, [test "$needsignal" = "yes"])
AM_CONDITIONAL(SIGNALFD_SUPPORT, [test "$ac_cv_header_sys_signalfd_h" = "yes"])
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_CHECK_TYPES([uint64_t, uint32_t, uint16_t, uint8_t, uintptr_t], , ,
[#ifdef HAVE_STDINT_H
#include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif])
AC_CHECK_TYPES([fd_mask], , ,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif])
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(size_t)
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(off_t)
AC_CHECK_SIZEOF(time_t)
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, struct sockaddr_un, sa_family_t, struct addrinfo, struct sockaddr_storage], , ,
[#define _GNU_SOURCE 1
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef _WIN32
#define WIN32_WINNT 0x400
#define _WIN32_WINNT 0x400
#define WIN32_LEAN_AND_MEAN
#if defined(_MSC_VER) && (_MSC_VER < 1300)
#include <winsock.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#endif
])
AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len, struct sockaddr_storage.ss_family, struct sockaddr_storage.__ss_family], , ,
[#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef _WIN32
#define WIN32_WINNT 0x400
#define _WIN32_WINNT 0x400
#define WIN32_LEAN_AND_MEAN
#if defined(_MSC_VER) && (_MSC_VER < 1300)
#include <winsock.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#endif
])
AC_CHECK_TYPES([struct linger],,,
[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#endif
])
AC_MSG_CHECKING([for socklen_t])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
#include <sys/types.h>
#ifdef _WIN32
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#endif
],[socklen_t x;]
)],
[AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])
AC_DEFINE(socklen_t, unsigned int,
[Define to unsigned int if you dont have it])]
)
dnl __func__/__FUNCTION__ is not a macros in general
AC_MSG_CHECKING([whether our compiler supports __func__])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],
[ const char *cp = __func__; ]
)],
[ AC_DEFINE(HAVE___func__, 1, [Define to 1 if compiler have __func__])
AC_MSG_RESULT([yes])
],
[AC_MSG_RESULT([no])]
)
AC_MSG_CHECKING([whether our compiler supports __FUNCTION__])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([],
[ const char *cp = __FUNCTION__; ]
)],
[ AC_DEFINE(HAVE___FUNCTION__, 1, [Define to 1 if compiler have __FUNCTION__])
AC_MSG_RESULT([yes])
],
[AC_MSG_RESULT([no])]
)
dnl check if we can compile with pthreads
have_pthreads=no
if test "$bwin32" != "true" && test "$enable_thread_support" != "no"; then
AX_PTHREAD([
AC_DEFINE([HAVE_PTHREADS], [1], [Define if we have pthreads on this system])
have_pthreads=yes
])
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
AC_CHECK_SIZEOF([pthread_t], [], [AC_INCLUDES_DEFAULT() #include <pthread.h> ])
AC_CHECK_FUNCS([pthread_mutexattr_setprotocol])
fi
AM_CONDITIONAL(THREADS, [test "$enable_thread_support" != "no"])
AM_CONDITIONAL(PTHREADS, [test "$have_pthreads" != "no" && test "$enable_thread_support" != "no"])
dnl check if we should compile locking into the library
if test "$enable_thread_support" = "no"; then
AC_DEFINE(DISABLE_THREAD_SUPPORT, 1,
[Define if libevent should not be compiled with thread support])
fi
dnl check if we should hard-code the mm functions.
if test "$enable_malloc_replacement" = "no"; then
AC_DEFINE(DISABLE_MM_REPLACEMENT, 1,
[Define if libevent should not allow replacing the mm functions])
fi
dnl check if we should hard-code debugging out
if test "$enable_debug_mode" = "no"; then
AC_DEFINE(DISABLE_DEBUG_MODE, 1,
[Define if libevent should build without support for a debug mode])
fi
dnl check if we should enable verbose debugging
if test "$enable_verbose_debug" = "yes"; then
CFLAGS="$CFLAGS -DUSE_DEBUG"
fi
dnl enable some warnings by default
AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"],[],[-Werror])
dnl Disable the strict-aliasing optimization, since it breaks
dnl our sockaddr-handling code in strange ways.
dnl See 52eb4951302554dd696d6a0120ad5d3f6cffb7bb.
AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-strict-aliasing"],[],[-Werror])
dnl Add warnings which we use in development but not for releases.
if test "$enable_gcc_warnings" != "no" && test "$GCC" = "yes"; then
dnl -W is the same as -Wextra
AX_CHECK_COMPILE_FLAG([-W], [CFLAGS="$CFLAGS -W"],[],[-Werror])
dnl The AX_CHECK_COMPILE_FLAG macro ignores warnings, so -Werror is used
dnl to convert warnings into errors and prevent the addition of unknown flags.
AX_CHECK_COMPILE_FLAG([-Waddress],[CFLAGS="$CFLAGS -Waddress"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wbad-function-cast],[CFLAGS="$CFLAGS -Wbad-function-cast"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wdeclaration-after-statement],[CFLAGS="$CFLAGS -Wdeclaration-after-statement"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wfloat-equal],[CFLAGS="$CFLAGS -Wfloat-equal"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Winit-self],[CFLAGS="$CFLAGS -Winit-self"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wlogical-op],[CFLAGS="$CFLAGS -Wlogical-op"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wmissing-declarations],[CFLAGS="$CFLAGS -Wmissing-declarations"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wmissing-field-initializers],[CFLAGS="$CFLAGS -Wmissing-field-initializers"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes],[CFLAGS="$CFLAGS -Wmissing-prototypes"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wnested-externs],[CFLAGS="$CFLAGS -Wnested-externs"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wnormalized=id],[CFLAGS="$CFLAGS -Wnormalized=id"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Woverride-init],[CFLAGS="$CFLAGS -Woverride-init"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wpointer-arith],[CFLAGS="$CFLAGS -Wpointer-arith"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wredundant-decls],[CFLAGS="$CFLAGS -Wredundant-decls"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes],[CFLAGS="$CFLAGS -Wstrict-prototypes"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wundef],[CFLAGS="$CFLAGS -Wundef"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wwrite-strings],[CFLAGS="$CFLAGS -Wwrite-strings"],[],[-Werror])
dnl Convert warnings into errors
if test "$enable_gcc_warnings" = "yes"; then
AX_CHECK_COMPILE_FLAG([-Werror], [CFLAGS="$CFLAGS -Werror"])
fi
dnl Disable warnings for unused parameters
AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [CFLAGS="$CFLAGS -Wno-unused-parameter"],[],[-Werror])
AX_CHECK_COMPILE_FLAG([-Wvoid-pointer-to-enum-cast], [CFLAGS="$CFLAGS -Wno-void-pointer-to-enum-cast"],[],[-Werror])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)
dnl Disable unused-function warnings. These trigger for minheap-internal.h.
AX_CHECK_COMPILE_FLAG([-Wno-unused-function], [CFLAGS="$CFLAGS -Wno-unused-function"],[],[-Werror])
dnl Disable unknown pragmas warnings.
AX_CHECK_COMPILE_FLAG([-Wno-pragmas], [CFLAGS="$CFLAGS -Wno-pragmas"],[],[-Werror])
dnl Disable Variable Length Array
AX_CHECK_COMPILE_FLAG([-Wvla], [CFLAGS="$CFLAGS -Wvla"],[],[-Werror])
if test "$have_clang" = "yes"; then
case "$host_os" in
darwin*)
dnl Clang on macOS emits warnings for each directory specified which
dnl isn't "used", generating a lot of build noise.
AX_CHECK_COMPILE_FLAG([-Qunused-arguments], [CFLAGS="$CFLAGS -Qunused-arguments"],[],[-Werror])
esac
fi
fi
LIBEVENT_GC_SECTIONS=
if test "$GCC" = yes && test "$enable_function_sections" = yes ; then
AC_CACHE_CHECK(
[if linker supports omitting unused code and data],
[libevent_cv_gc_sections_runs],
[
dnl NetBSD will link but likely not run with --gc-sections
dnl http://bugs.ntp.org/1844
dnl http://gnats.netbsd.org/40401
dnl --gc-sections causes attempt to load as linux elf, with
dnl wrong syscalls in place. Test a little gauntlet of
dnl simple stdio read code checking for errors, expecting
dnl enough syscall differences that the NetBSD code will
dnl fail even with Linux emulation working as designed.
dnl A shorter test could be refined by someone with access
dnl to a NetBSD host with Linux emulation working.
origCFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wl,--gc-sections"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <stdlib.h>
#include <stdio.h>
]],
[[
FILE * fpC;
char buf[32];
size_t cch;
int read_success_once;
fpC = fopen("conftest.c", "r");
if (NULL == fpC)
exit(1);
do {
cch = fread(buf, sizeof(buf), 1, fpC);
read_success_once |= (0 != cch);
} while (0 != cch);
if (!read_success_once)
exit(2);
if (!feof(fpC))
exit(3);
if (0 != fclose(fpC))
exit(4);
exit(EXIT_SUCCESS);
]]
)],
[
dnl We have to do this invocation manually so that we can
dnl get the output of conftest.err to make sure it doesn't
dnl mention gc-sections.
if test "$cross_compiling" = "yes" || grep gc-sections conftest.err ; then
libevent_cv_gc_sections_runs=no
else
libevent_cv_gc_sections_runs=no
./conftest >/dev/null 2>&1 && libevent_cv_gc_sections_runs=yes
fi
],
[libevent_cv_gc_sections_runs=no]
)
CFLAGS="$origCFLAGS"
AS_UNSET([origCFLAGS])
]
)
case "$libevent_cv_gc_sections_runs" in
yes)
CFLAGS="-ffunction-sections -fdata-sections $CFLAGS"
LIBEVENT_GC_SECTIONS="-Wl,--gc-sections"
;;
esac
fi
AC_SUBST([LIBEVENT_GC_SECTIONS])
AM_CONDITIONAL([INSTALL_LIBEVENT], [test "$enable_libevent_install" = "yes"])
dnl Allow additional flags from a containing package such as NTP
AC_SUBST([LIBEVENT_CFLAGS])
AC_SUBST([LIBEVENT_CPPFLAGS])
AC_SUBST([LIBEVENT_LDFLAGS])
AC_C_BIGENDIAN([CFLAGS="$CFLAGS -DBIG_ENDIAN"], [CFLAGS="$CFLAGS -DLITTLE_ENDIAN"])
dnl Doxygen support
DX_HTML_FEATURE(ON)
DX_MAN_FEATURE(OFF)
DX_RTF_FEATURE(OFF)
DX_XML_FEATURE(OFF)
DX_PDF_FEATURE(OFF)
DX_PS_FEATURE(OFF)
DX_CHM_FEATURE(OFF)
DX_CHI_FEATURE(OFF)
DX_INIT_DOXYGEN([libevent], [${top_srcdir}/Doxyfile], [doxygen])
AM_CONDITIONAL([ENABLE_DOXYGEN], [test "$DX_FLAG_doc" = "1"])
AM_CONDITIONAL([ENABLE_DOXYGEN_MAN], [test "$DX_FLAG_man" = "1"])
dnl autotools uses the same pkg-config templates as cmake, and in cmake we have
dnl CMAKE_DEBUG_POSTFIX, so define it to empty value to simply replace it in
dnl *.pc.in
CMAKE_DEBUG_POSTFIX=""
AC_SUBST([CMAKE_DEBUG_POSTFIX])
AC_CONFIG_FILES([Makefile libevent.pc libevent_mbedtls.pc libevent_openssl.pc libevent_pthreads.pc libevent_core.pc libevent_extra.pc] )
AC_OUTPUT
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