199 lines
6.5 KiB
Plaintext
199 lines
6.5 KiB
Plaintext
# Macros that test various C library quirks
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# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.10 2001/12/20 21:23:05 momjian 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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# HAVE_INT_TIMEZONE.
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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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int res;],
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[res = timezone / 60;],
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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"$pgac_cv_var_int_timezone" = xyes ; then
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AC_DEFINE(HAVE_INT_TIMEZONE,, [Set to 1 if you have the global variable timezone])
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fi])# PGAC_VAR_INT_TIMEZONE
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# PGAC_FUNC_GETTIMEOFDAY_1ARG
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# ---------------------------
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# Check if gettimeofday() has only one arguments. (Normal is two.)
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# If so, define GETTIMEOFDAY_1ARG.
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AC_DEFUN([PGAC_FUNC_GETTIMEOFDAY_1ARG],
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[AC_CACHE_CHECK(whether gettimeofday takes only one argument,
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pgac_cv_func_gettimeofday_1arg,
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[AC_TRY_COMPILE([#include <sys/time.h>],
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[struct timeval *tp;
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struct timezone *tzp;
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gettimeofday(tp,tzp);],
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[pgac_cv_func_gettimeofday_1arg=no],
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[pgac_cv_func_gettimeofday_1arg=yes])])
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if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
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AC_DEFINE(GETTIMEOFDAY_1ARG,, [Set to 1 if gettimeofday() takes only 1 argument])
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fi])# PGAC_FUNC_GETTIMEOFDAY_1ARG
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# PGAC_FUNC_MEMCMP
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# -----------
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# Check if memcmp() properly handles negative bytes and returns +/-.
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# SunOS does not.
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# AC_FUNC_MEMCMP
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AC_DEFUN(PGAC_FUNC_MEMCMP,
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[AC_CACHE_CHECK(for 8-bit clean memcmp, pgac_cv_func_memcmp_clean,
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[AC_TRY_RUN([
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main()
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{
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char c0 = 0x40, c1 = 0x80, c2 = 0x81;
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exit(memcmp(&c0, &c2, 1) < 0 && memcmp(&c1, &c2, 1) < 0 ? 0 : 1);
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}
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], pgac_cv_func_memcmp_clean=yes, pgac_cv_func_memcmp_clean=no,
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pgac_cv_func_memcmp_clean=no)])
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if test $pgac_cv_func_memcmp_clean = no ; then
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MEMCMP=memcmp.o
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else
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MEMCMP=
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fi
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AC_SUBST(MEMCMP)dnl
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])
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# PGAC_UNION_SEMUN
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# ----------------
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# Check if `union semun' exists. Define HAVE_UNION_SEMUN if so.
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# If it doesn't then one could define it as
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# union semun { int val; struct semid_ds *buf; unsigned short *array; }
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AC_DEFUN([PGAC_UNION_SEMUN],
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[AC_CACHE_CHECK(for union semun, pgac_cv_union_semun,
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[AC_TRY_COMPILE([#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>],
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[union semun semun;],
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[pgac_cv_union_semun=yes],
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[pgac_cv_union_semun=no])])
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if test x"$pgac_cv_union_semun" = xyes ; then
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AC_DEFINE(HAVE_UNION_SEMUN, 1, [Set to 1 if you have `union semun'])
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fi])# 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_STRUCT_SOCKADDR_UN. If
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# it is missing then one could define it as { short int sun_family;
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# char sun_path[108]; }. (Requires test for <sys/un.h>!)
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AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
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[AC_CACHE_CHECK([for struct sockaddr_un], pgac_cv_struct_sockaddr_un,
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[AC_TRY_COMPILE([#include <sys/types.h>
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#ifdef HAVE_SYS_UN_H
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#include <sys/un.h>
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#endif],
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[struct sockaddr_un un;],
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[pgac_cv_struct_sockaddr_un=yes],
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[pgac_cv_struct_sockaddr_un=no])])
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if test x"$pgac_cv_struct_sockaddr_un" = xyes; then
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AC_DEFINE(HAVE_STRUCT_SOCKADDR_UN, 1, [Set to 1 if you have `struct sockaddr_un'])
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fi])# PGAC_STRUCT_SOCKADDR_UN
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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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# to yes or no.
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#
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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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# a fancier check.
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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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],
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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,, [Set to 1 if you have the POSIX signal interface])
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fi
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HAVE_POSIX_SIGNALS=$pgac_cv_func_posix_signals
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AC_SUBST(HAVE_POSIX_SIGNALS)])# PGAC_FUNC_POSIX_SIGNALS
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# PGAC_STRUCT_CMSGCRED
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# --------------------
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# Check if `struct cmsgcred' exists. Define HAVE_STRUCT_CMSGCRED if so.
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AC_DEFUN([PGAC_STRUCT_CMSGCRED],
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[AC_CACHE_CHECK(for struct cmsgcred, pgac_cv_struct_cmsgcred,
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[AC_TRY_COMPILE([#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/ucred.h>],
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[struct cmsgcred sockcred;],
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[pgac_cv_struct_cmsgcred=yes],
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[pgac_cv_struct_cmsgcred=no])])
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if test x"$pgac_cv_struct_cmsgcred" = xyes ; then
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AC_DEFINE(HAVE_STRUCT_CMSGCRED, 1, [Set to 1 if you have `struct cmsgcred'])
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fi])# PGAC_STRUCT_CMSGCRED
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# PGAC_STRUCT_FCRED
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# -----------------
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# Check if `struct fcred' exists. Define HAVE_STRUCT_FCRED if so.
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AC_DEFUN([PGAC_STRUCT_FCRED],
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[AC_CACHE_CHECK(for struct fcred, pgac_cv_struct_fcred,
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[AC_TRY_COMPILE([#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/ucred.h>],
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[struct fcred sockcred;],
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[pgac_cv_struct_fcred=yes],
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[pgac_cv_struct_fcred=no])])
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if test x"$pgac_cv_struct_fcred" = xyes ; then
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AC_DEFINE(HAVE_STRUCT_FCRED, 1, [Set to 1 if you have `struct fcred'])
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fi])# PGAC_STRUCT_FCRED
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# PGAC_STRUCT_SOCKCRED
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# --------------------
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# Check if `struct sockcred' exists. Define HAVE_STRUCT_SOCKCRED if so.
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AC_DEFUN([PGAC_STRUCT_SOCKCRED],
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[AC_CACHE_CHECK(for struct sockcred, pgac_cv_struct_sockcred,
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[AC_TRY_COMPILE([#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/ucred.h>],
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[struct sockcred sockcred;],
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[pgac_cv_struct_sockcred=yes],
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[pgac_cv_struct_sockcred=no])])
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if test x"$pgac_cv_struct_sockcred" = xyes ; then
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AC_DEFINE(HAVE_STRUCT_SOCKCRED, 1, [Set to 1 if you have `struct sockcred'])
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fi])# PGAC_STRUCT_SOCKCRED
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# PGAC_HEADER_STRING
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# ------------------
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# Tests whether <string.h> and <strings.h> can both be included
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# (without generating warnings). This is mostly useful if you need
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# str[n]casecmp(), since this is not in the "standard" <string.h>
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# on some systems.
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AC_DEFUN([PGAC_HEADER_STRING],
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[AC_CACHE_CHECK([whether string.h and strings.h may both be included],
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[pgac_cv_header_strings_both],
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[AC_TRY_CPP(
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[#include <string.h>
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#include <strings.h>
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],
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[AC_TRY_COMPILE(
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[#include <string.h>
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#include <strings.h>
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],
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[int n = strcasecmp("a", "b");],
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[pgac_cv_header_strings_both=yes],
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[pgac_cv_header_strings_both=no])],
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[pgac_cv_header_strings_both=no])])
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if test x"$pgac_cv_header_strings_both" = x"yes"; then
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AC_DEFINE([STRING_H_WITH_STRINGS_H], 1,
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[Define if string.h and strings.h may both be included])
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fi])
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