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Instead of XXX_IN_XLOCALE_H for several features XXX, let's just include <xlocale.h> if HAVE_XLOCALE_H. The reason for the extra complication was apparently that some old glibc systems also had an <xlocale.h>, and you weren't supposed to include it directly, but it's gone now (as far as I can tell it was harmless to do so anyway). Author: Thomas Munro <thomas.munro@gmail.com> Discussion: https://postgr.es/m/CWZBBRR6YA8D.8EHMDRGLCKCD%40neon.tech
84 lines
2.6 KiB
Plaintext
84 lines
2.6 KiB
Plaintext
# Macros that test various C library quirks
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# config/c-library.m4
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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_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>
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int res;],
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[#ifndef __CYGWIN__
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res = timezone / 60;
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#else
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res = _timezone / 60;
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#endif])],
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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, 1,
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[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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# ------------------
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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_STRUCT_TM_TM_ZONE'. Unlike the
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# standard macro AC_STRUCT_TIMEZONE, we don't check for `tzname[]' if
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# not found, since we don't use it. (We use `int timezone' as a
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# fallback.)
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AC_DEFUN([PGAC_STRUCT_TIMEZONE],
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[AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h>
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#include <time.h>
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])
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])# PGAC_STRUCT_TIMEZONE
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# PGAC_FUNC_STRERROR_R_INT
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# ---------------------------
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# Check if strerror_r() returns int (POSIX) rather than char * (GNU libc).
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# If so, define STRERROR_R_INT.
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# The result is uncertain if strerror_r() isn't provided,
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# but we don't much care.
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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_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <string.h>],
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[[char buf[100];
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switch (strerror_r(1, buf, sizeof(buf)))
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{ case 0: break; default: break; }
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]])],
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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, 1,
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[Define to 1 if strerror_r() returns int.])
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fi
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])# PGAC_FUNC_STRERROR_R_INT
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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_CHECK_TYPES([union semun], [], [],
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[#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/sem.h>
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])])# PGAC_UNION_SEMUN
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# PGAC_STRUCT_SOCKADDR_MEMBERS
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# ----------------------------
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# Check if struct sockaddr and subtypes have 4.4BSD-style length.
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AC_DEFUN([PGAC_STRUCT_SOCKADDR_SA_LEN],
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[AC_CHECK_MEMBERS([struct sockaddr.sa_len], [], [],
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[#include <sys/types.h>
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#include <sys/socket.h>
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])])# PGAC_STRUCT_SOCKADDR_MEMBERS
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