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# Macros that test various C library quirks
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# $PostgreSQL: pgsql/config/c-library.m4,v 1.33 2008/08/21 13:53:28 petere Exp $
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# PGAC_VAR_INT_TIMEZONE
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# ---------------------
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# Check if the global variable `timezone' exists. If so, define
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AC_DEFUN([PGAC_VAR_INT_TIMEZONE],
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[AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
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[AC_TRY_LINK([#include <time.h>
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[pgac_cv_var_int_timezone=yes],
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[pgac_cv_var_int_timezone=no])])
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if test x"$pgac_cv_var_int_timezone" = xyes ; then
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AC_DEFINE(HAVE_INT_TIMEZONE,, [Define to 1 if you have the global variable 'int timezone'.])
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fi])# PGAC_VAR_INT_TIMEZONE
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# PGAC_STRUCT_TIMEZONE
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# Figure out how to get the current timezone. If `struct tm' has a
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# `tm_zone' member, define `HAVE_TM_ZONE'. Also, if the
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# external array `tzname' is found, define `HAVE_TZNAME'.
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# This is the same as the standard macro AC_STRUCT_TIMEZONE, except that
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# tzname[] is checked for regardless of whether we find tm_zone.
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AC_DEFUN([PGAC_STRUCT_TIMEZONE],
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[AC_REQUIRE([AC_STRUCT_TM])dnl
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AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h>
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#include <$ac_cv_struct_tm>
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if test "$ac_cv_member_struct_tm_tm_zone" = yes; then
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AC_DEFINE(HAVE_TM_ZONE, 1,
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[Define to 1 if your `struct tm' has `tm_zone'. Deprecated, use
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`HAVE_STRUCT_TM_TM_ZONE' instead.])
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AC_CACHE_CHECK(for tzname, ac_cv_var_tzname,
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#ifndef tzname /* For SGI. */
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extern char *tzname[]; /* RS6000 and others reject char **tzname. */
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[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])
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if test $ac_cv_var_tzname = yes; then
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AC_DEFINE(HAVE_TZNAME, 1,
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[Define to 1 if you have the external array `tzname'.])
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])# PGAC_STRUCT_TIMEZONE
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# PGAC_FUNC_GETTIMEOFDAY_1ARG
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# ---------------------------
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# Check if gettimeofday() has only one arguments. (Normal is two.)
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# If so, define GETTIMEOFDAY_1ARG.
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AC_DEFUN([PGAC_FUNC_GETTIMEOFDAY_1ARG],
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[AC_CACHE_CHECK(whether gettimeofday takes only one argument,
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pgac_cv_func_gettimeofday_1arg,
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[AC_TRY_COMPILE([#include <sys/time.h>],
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gettimeofday(tp,tzp);],
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[pgac_cv_func_gettimeofday_1arg=no],
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[pgac_cv_func_gettimeofday_1arg=yes])])
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if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
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AC_DEFINE(GETTIMEOFDAY_1ARG,, [Define to 1 if gettimeofday() takes only 1 argument.])
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AH_VERBATIM(GETTIMEOFDAY_1ARG_,
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[@%:@ifdef GETTIMEOFDAY_1ARG
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@%:@ define gettimeofday(a,b) gettimeofday(a)
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])# PGAC_FUNC_GETTIMEOFDAY_1ARG
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# PGAC_FUNC_GETPWUID_R_5ARG
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# ---------------------------
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# Check if getpwuid_r() takes a fifth argument (later POSIX standard, not draft version)
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# If so, define GETPWUID_R_5ARG
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AC_DEFUN([PGAC_FUNC_GETPWUID_R_5ARG],
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[AC_CACHE_CHECK(whether getpwuid_r takes a fifth argument,
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pgac_cv_func_getpwuid_r_5arg,
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[AC_TRY_COMPILE([#include <sys/types.h>
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struct passwd **result;
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getpwuid_r(uid, space, buf, bufsize, result);],
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[pgac_cv_func_getpwuid_r_5arg=yes],
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[pgac_cv_func_getpwuid_r_5arg=no])])
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if test x"$pgac_cv_func_getpwuid_r_5arg" = xyes ; then
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AC_DEFINE(GETPWUID_R_5ARG,, [Define to 1 if getpwuid_r() takes a 5th argument.])
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])# PGAC_FUNC_GETPWUID_R_5ARG
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# PGAC_FUNC_STRERROR_R_INT
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# ---------------------------
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# Check if strerror_r() returns an int (SUSv3) rather than a char * (GNU libc)
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# If so, define STRERROR_R_INT
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AC_DEFUN([PGAC_FUNC_STRERROR_R_INT],
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[AC_CACHE_CHECK(whether strerror_r returns int,
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pgac_cv_func_strerror_r_int,
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[AC_TRY_COMPILE([#include <string.h>],
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int strerror_r(int, char *, size_t);
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/* Older AIX has 'int' for the third argument so we don't test the args. */
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[pgac_cv_func_strerror_r_int=yes],
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[pgac_cv_func_strerror_r_int=no])])
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if test x"$pgac_cv_func_strerror_r_int" = xyes ; then
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AC_DEFINE(STRERROR_R_INT,, [Define to 1 if strerror_r() returns a int.])
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])# PGAC_FUNC_STRERROR_R_INT
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# Check if `union semun' exists. Define HAVE_UNION_SEMUN if so.
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# If it doesn't then one could define it as
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# union semun { int val; struct semid_ds *buf; unsigned short *array; }
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AC_DEFUN([PGAC_UNION_SEMUN],
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[AC_CHECK_TYPES([union semun], [], [],
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[#include <sys/types.h>
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#include <sys/sem.h>])])# PGAC_UNION_SEMUN
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# PGAC_STRUCT_SOCKADDR_UN
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# -----------------------
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# If `struct sockaddr_un' exists, define HAVE_UNIX_SOCKETS.
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# (Requires test for <sys/un.h>!)
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AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
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[AC_CHECK_TYPES([struct sockaddr_un], [AC_DEFINE(HAVE_UNIX_SOCKETS, 1, [Define to 1 if you have unix sockets.])], [],
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[#include <sys/types.h>
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])])# PGAC_STRUCT_SOCKADDR_UN
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# PGAC_STRUCT_SOCKADDR_STORAGE
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# ----------------------------
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# If `struct sockaddr_storage' exists, define HAVE_STRUCT_SOCKADDR_STORAGE.
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# If it is missing then one could define it.
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AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE],
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[AC_CHECK_TYPES([struct sockaddr_storage], [], [],
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[#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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])])# PGAC_STRUCT_SOCKADDR_STORAGE
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# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
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# --------------------------------------
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# Check the members of `struct sockaddr_storage'. We need to know about
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# ss_family and ss_len. (Some platforms follow RFC 2553 and call them
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# __ss_family and __ss_len.) We also check struct sockaddr's sa_len;
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# if we have to define our own `struct sockaddr_storage', this tells us
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# whether we need to provide an ss_len field.
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AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS],
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[AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family,
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struct sockaddr_storage.__ss_family,
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struct sockaddr_storage.ss_len,
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struct sockaddr_storage.__ss_len,
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struct sockaddr.sa_len], [], [],
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[#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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])])# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
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# PGAC_STRUCT_ADDRINFO
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# -----------------------
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# If `struct addrinfo' exists, define HAVE_STRUCT_ADDRINFO.
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AC_DEFUN([PGAC_STRUCT_ADDRINFO],
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[AC_CHECK_TYPES([struct addrinfo], [], [],
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[#include <sys/types.h>
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#include <sys/socket.h>
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])])# PGAC_STRUCT_ADDRINFO
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# PGAC_FUNC_POSIX_SIGNALS
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# -----------------------
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# Check to see if the machine has the POSIX signal interface. Define
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# HAVE_POSIX_SIGNALS if so. Also set the output variable HAVE_POSIX_SIGNALS
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# Note that this test only compiles a test program, it doesn't check
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# whether the routines actually work. If that becomes a problem, make
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AC_DEFUN([PGAC_FUNC_POSIX_SIGNALS],
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[AC_CACHE_CHECK(for POSIX signal interface, pgac_cv_func_posix_signals,
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[AC_TRY_LINK([#include <signal.h>
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[struct sigaction act, oact;
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sigemptyset(&act.sa_mask);
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act.sa_flags = SA_RESTART;
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sigaction(0, &act, &oact);],
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[pgac_cv_func_posix_signals=yes],
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[pgac_cv_func_posix_signals=no])])
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if test x"$pgac_cv_func_posix_signals" = xyes ; then
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AC_DEFINE(HAVE_POSIX_SIGNALS,, [Define to 1 if you have the POSIX signal interface.])
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HAVE_POSIX_SIGNALS=$pgac_cv_func_posix_signals
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AC_SUBST(HAVE_POSIX_SIGNALS)])# PGAC_FUNC_POSIX_SIGNALS
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# PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT
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# ---------------------------------------
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# Determine which format snprintf uses for long long int. We handle
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# %lld, %qd, %I64d. The result is in shell variable
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# LONG_LONG_INT_FORMAT.
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# MinGW uses '%I64d', though gcc throws an warning with -Wall,
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# while '%lld' doesn't generate a warning, but doesn't work.
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AC_DEFUN([PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT],
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[AC_MSG_CHECKING([snprintf format for long long int])
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AC_CACHE_VAL(pgac_cv_snprintf_long_long_int_format,
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[for pgac_format in '%lld' '%qd' '%I64d'; do
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AC_TRY_RUN([#include <stdio.h>
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typedef long long int ac_int64;
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#define INT64_FORMAT "$pgac_format"
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ac_int64 a = 20000001;
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ac_int64 b = 40000005;
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int does_int64_snprintf_work()
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if (sizeof(ac_int64) != 8)
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return 0; /* doesn't look like the right size */
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snprintf(buf, 100, INT64_FORMAT, c);
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if (strcmp(buf, "800000140000005") != 0)
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return 0; /* either multiply or snprintf is busted */
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exit(! does_int64_snprintf_work());
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[pgac_cv_snprintf_long_long_int_format=$pgac_format; break],
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[pgac_cv_snprintf_long_long_int_format=cross; break])
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done])dnl AC_CACHE_VAL
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LONG_LONG_INT_FORMAT=''
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case $pgac_cv_snprintf_long_long_int_format in
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cross) AC_MSG_RESULT([cannot test (not on host machine)]);;
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?*) AC_MSG_RESULT([$pgac_cv_snprintf_long_long_int_format])
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LONG_LONG_INT_FORMAT=$pgac_cv_snprintf_long_long_int_format;;
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*) AC_MSG_RESULT(none);;
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esac])# PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT
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# PGAC_FUNC_PRINTF_ARG_CONTROL
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# ---------------------------------------
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# Determine if printf supports %1$ argument selection, e.g. %5$ selects
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# the fifth argument after the printf print string.
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# This is not in the C99 standard, but in the Single Unix Specification (SUS).
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# It is used in our language translation strings.
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AC_DEFUN([PGAC_FUNC_PRINTF_ARG_CONTROL],
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[AC_MSG_CHECKING([whether printf supports argument control])
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AC_CACHE_VAL(pgac_cv_printf_arg_control,
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[AC_TRY_RUN([#include <stdio.h>
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/* can it swap arguments? */
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snprintf(buf, 100, "%2\$d %1\$d", 3, 4);
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if (strcmp(buf, "4 3") != 0)
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[pgac_cv_printf_arg_control=yes],
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[pgac_cv_printf_arg_control=no],
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[pgac_cv_printf_arg_control=cross])
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AC_MSG_RESULT([$pgac_cv_printf_arg_control])
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])# PGAC_FUNC_PRINTF_ARG_CONTROL
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# backport from Autoconf 2.61a
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# http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=f0c325537a22105536ac8c4e88656e50f9946486
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AN_FUNCTION([ftello], [AC_FUNC_FSEEKO])
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AN_FUNCTION([fseeko], [AC_FUNC_FSEEKO])
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AC_DEFUN([AC_FUNC_FSEEKO],
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[_AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1,
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[ac_cv_sys_largefile_source],
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[Define to 1 to make fseeko visible on some hosts (e.g. glibc 2.2).],
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[[#include <sys/types.h> /* for off_t */
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#include <stdio.h>]],
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[[int (*fp) (FILE *, off_t, int) = fseeko;
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return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);]])
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# We used to try defining _XOPEN_SOURCE=500 too, to work around a bug
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# in glibc 2.1.3, but that breaks too many other things.
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# If you want fseeko and ftello with glibc, upgrade to a fixed glibc.
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if test $ac_cv_sys_largefile_source != unknown; then
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AC_DEFINE(HAVE_FSEEKO, 1,
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[Define to 1 if fseeko (and presumably ftello) exists and is declared.])
added
removed
c-library.m4
