ossp-pkg/sa/sa.ac
dnl ##
dnl ## OSSP sa - Socket Abstraction
dnl ## Copyright (c) 2001-2006 Ralf S. Engelschall <rse@engelschall.com>
dnl ## Copyright (c) 2001-2006 The OSSP Project <http://www.ossp.org/>
dnl ## Copyright (c) 2001-2005 Cable & Wireless <http://www.cw.com/>
dnl ##
dnl ## This file is part of OSSP sa, a socket abstraction library which
dnl ## can be found at http://www.ossp.org/pkg/lib/sa/.
dnl ##
dnl ## Permission to use, copy, modify, and distribute this software for
dnl ## any purpose with or without fee is hereby granted, provided that
dnl ## the above copyright notice and this permission notice appear in all
dnl ## copies.
dnl ##
dnl ## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
dnl ## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
dnl ## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
dnl ## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
dnl ## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
dnl ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
dnl ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
dnl ## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
dnl ## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
dnl ## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
dnl ## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
dnl ## SUCH DAMAGE.
dnl ##
dnl ## sa.ac: socket abstraction Autoconf checks
dnl ##
dnl # Check for an ANSI C typedef in a header
dnl # configure.in:
dnl # SA_CHECK_TYPEDEF(<typedef>, <header>)
dnl # acconfig.h:
dnl # #undef HAVE_<typedef>
AC_DEFUN(SA_CHECK_TYPEDEF,[dnl
AC_REQUIRE([AC_HEADER_STDC])dnl
AC_MSG_CHECKING(for typedef $1)
AC_CACHE_VAL(ac_cv_typedef_$1,[
AC_EGREP_CPP(dnl
changequote(<<,>>)dnl
<<(^|[^a-zA-Z_0-9])$1[^a-zA-Z_0-9]>>dnl
changequote([,]), [
#include <$2>],
ac_cv_typedef_$1=yes,
ac_cv_typedef_$1=no
)
])dnl
AC_MSG_RESULT($ac_cv_typedef_$1)
if test $ac_cv_typedef_$1 = yes; then
AC_DEFINE(HAVE_[]translit($1, [a-z], [A-Z]), 1, [Define to 1 if $1 exists])
fi
])
dnl # Check whether to use SO_RCVTIMEO|SO_SNDTIMEO with setsockopt(2)
dnl # configure.ac:
dnl # SA_CHECK_SOCKOPT(SO_RCVTIMEO)
dnl # SA_CHECK_SOCKOPT(SO_SNDTIMEO)
dnl # config.h:
dnl # #undef USE_SO_RCVTIMEO or #define USE_SO_RCVTIMEO 1
dnl # #undef USE_SO_SNDTIMEO or #define USE_SO_SNDTIMEO 1
AC_DEFUN(SA_CHECK_SOCKOPT, [
AC_MSG_CHECKING(whether to use $1 with setsockopt(2))
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
int main(void)
{
int s;
struct timeval timeo;
timeo.tv_sec = 3;
timeo.tv_usec = 3;
#ifndef $1
exit(3);
#else
if ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1)
exit(2);
/* fails on Solaris 2.6,8,9,10 and Debian 2.2 because
SO_RCVTIMEO|SO_SNDTIMEO are defined but not implemented */
if (setsockopt(s, SOL_SOCKET, $1, (void *)&timeo, sizeof(timeo)) == -1)
exit(1);
exit(0);
#endif
}
]
, [ AC_MSG_RESULT([yes]) AC_DEFINE(USE_$1, 1, [Define to use $1 with setsockopt(2)]) ]
, [ AC_MSG_RESULT([no]) ]
)
])dnl
dnl ##
dnl ## Check for C99 va_copy() implementation
dnl ## (and provide fallback implementation if neccessary)
dnl ##
dnl ## configure.in:
dnl ## SA_CHECK_VA_COPY
dnl ## foo.c:
dnl ## #include "config.h"
dnl ## [...]
dnl ## va_copy(d,s)
dnl ##
dnl ## This check is rather complex: first because we really have to
dnl ## try various possible implementations in sequence and second, we
dnl ## cannot define a macro in config.h with parameters directly.
dnl ##
dnl # test program for va_copy() implementation
changequote(<<,>>)
m4_define(__va_copy_test, <<[
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#define DO_VA_COPY(d, s) $1
void test(char *str, ...)
{
va_list ap, ap2;
int i;
va_start(ap, str);
DO_VA_COPY(ap2, ap);
for (i = 1; i <= 9; i++) {
int k = (int)va_arg(ap, int);
if (k != i)
abort();
}
DO_VA_COPY(ap, ap2);
for (i = 1; i <= 9; i++) {
int k = (int)va_arg(ap, int);
if (k != i)
abort();
}
va_end(ap);
}
int main(int argc, char *argv[])
{
test("test", 1, 2, 3, 4, 5, 6, 7, 8, 9);
exit(0);
}
]>>)
changequote([,])
dnl # test driver for va_copy() implementation
m4_define(__va_copy_check, [
AH_VERBATIM($1,
[/* Predefined possible va_copy() implementation (id: $1) */
#define __VA_COPY_USE_$1(d, s) $2])
if test ".$ac_cv_va_copy" = .; then
AC_TRY_RUN(__va_copy_test($2), [ac_cv_va_copy="$1"])
fi
])
dnl # Autoconf check for va_copy() implementation checking
AC_DEFUN(SA_CHECK_VA_COPY,[
dnl # provide Autoconf display check message
AC_MSG_CHECKING(for va_copy() function)
dnl # check for various implementations in priorized sequence
AC_CACHE_VAL(ac_cv_va_copy, [
ac_cv_va_copy=""
dnl # 1. check for standardized C99 macro
__va_copy_check(C99, [va_copy((d), (s))])
dnl # 2. check for alternative/deprecated GCC macro
__va_copy_check(GCM, [VA_COPY((d), (s))])
dnl # 3. check for internal GCC macro (high-level define)
__va_copy_check(GCH, [__va_copy((d), (s))])
dnl # 4. check for internal GCC macro (built-in function)
__va_copy_check(GCB, [__builtin_va_copy((d), (s))])
dnl # 5. check for assignment approach (assuming va_list is a struct)
__va_copy_check(ASS, [do { (d) = (s); } while (0)])
dnl # 6. check for assignment approach (assuming va_list is a pointer)
__va_copy_check(ASP, [do { *(d) = *(s); } while (0)])
dnl # 7. check for memory copying approach (assuming va_list is a struct)
__va_copy_check(CPS, [memcpy((void *)&(d), (void *)&(s)), sizeof((s))])
dnl # 8. check for memory copying approach (assuming va_list is a pointer)
__va_copy_check(CPP, [memcpy((void *)(d), (void *)(s)), sizeof(*(s))])
if test ".$ac_cv_va_copy" = .; then
AC_ERROR([no working implementation found])
fi
])
dnl # optionally activate the fallback implementation
if test ".$ac_cv_va_copy" = ".C99"; then
AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy() macro exists (and no fallback implementation is required)])
fi
dnl # declare which fallback implementation to actually use
AC_DEFINE_UNQUOTED([__VA_COPY_USE], [__VA_COPY_USE_$ac_cv_va_copy],
[Define to id of used va_copy() implementation])
dnl # provide activation hook for fallback implementation
AH_VERBATIM([__VA_COPY_ACTIVATION],
[/* Optional va_copy() implementation activation */
#ifndef HAVE_VA_COPY
#define va_copy(d, s) __VA_COPY_USE(d, s)
#endif
])
dnl # provide Autoconf display result message
if test ".$ac_cv_va_copy" = ".C99"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no (using fallback implementation)])
fi
])
dnl # Check for anything OSSP SA wants to know
dnl # configure.in:
dnl # SA_CHECK_ALL
AC_DEFUN(SA_CHECK_ALL,[
# make sure libnsl and libsocket are linked in if they exist
AC_CHECK_LIB(nsl, gethostname)
if test ".`echo $LIBS | grep nsl`" = .; then
AC_CHECK_LIB(nsl, gethostbyname)
fi
AC_CHECK_LIB(socket, accept)
# make sure some platforms find their IPv6 library
AC_CHECK_LIB(inet6, getaddrinfo)
# check for system headers
AC_CHECK_HEADERS(string.h sys/types.h sys/socket.h netdb.h netinet/in.h)
# check for system functions
AC_CHECK_FUNCS(inet_addr inet_aton inet_pton inet_ntoa inet_ntop snprintf getaddrinfo)
dnl # check for network/socket size type
SA_CHECK_TYPEDEF(socklen_t, sys/socket.h)
SA_CHECK_TYPEDEF(ssize_t, sys/types.h)
SA_CHECK_SOCKOPT(SO_RCVTIMEO)
SA_CHECK_SOCKOPT(SO_SNDTIMEO)
dnl # check for va_copy()
SA_CHECK_VA_COPY
])
