config/c-library.m4 - cloudberry - Git at Google

 # Macros that test various C library quirks
 # config/c-library.m4


 # PGAC_VAR_INT_TIMEZONE
 # ---------------------
 # Check if the global variable `timezone' exists. If so, define
 # HAVE_INT_TIMEZONE.
 AC_DEFUN([PGAC_VAR_INT_TIMEZONE],
 [AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>
 int res;],
   [#ifndef __CYGWIN__
 res = timezone / 60;
 #else
 res = _timezone / 60;
 #endif])],
   [pgac_cv_var_int_timezone=yes],
   [pgac_cv_var_int_timezone=no])])
 if test x"$pgac_cv_var_int_timezone" = xyes ; then
   AC_DEFINE(HAVE_INT_TIMEZONE, 1,
             [Define to 1 if you have the global variable 'int timezone'.])
 fi])# PGAC_VAR_INT_TIMEZONE


 # PGAC_STRUCT_TIMEZONE
 # ------------------
 # Figure out how to get the current timezone.  If `struct tm' has a
 # `tm_zone' member, define `HAVE_STRUCT_TM_TM_ZONE'.  Unlike the
 # standard macro AC_STRUCT_TIMEZONE, we don't check for `tzname[]' if
 # not found, since we don't use it.  (We use `int timezone' as a
 # fallback.)
 AC_DEFUN([PGAC_STRUCT_TIMEZONE],
 [AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h>
 #include <time.h>
 ])
 ])# PGAC_STRUCT_TIMEZONE


 # PGAC_FUNC_GETTIMEOFDAY_1ARG
 # ---------------------------
 # Check if gettimeofday() has only one arguments. (Normal is two.)
 # If so, define GETTIMEOFDAY_1ARG.
 AC_DEFUN([PGAC_FUNC_GETTIMEOFDAY_1ARG],
 [AC_CACHE_CHECK(whether gettimeofday takes only one argument,
 pgac_cv_func_gettimeofday_1arg,
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/time.h>],
 [struct timeval *tp = 0;
 struct timezone *tzp = 0;
 gettimeofday(tp,tzp);])],
 [pgac_cv_func_gettimeofday_1arg=no],
 [pgac_cv_func_gettimeofday_1arg=yes])])
 if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
   AC_DEFINE(GETTIMEOFDAY_1ARG, 1,
             [Define to 1 if gettimeofday() takes only 1 argument.])
 fi
 AH_VERBATIM(GETTIMEOFDAY_1ARG_,
 [@%:@ifdef GETTIMEOFDAY_1ARG
 @%:@ define gettimeofday(a,b) gettimeofday(a)
 @%:@endif])dnl
 ])# PGAC_FUNC_GETTIMEOFDAY_1ARG


 # PGAC_FUNC_STRERROR_R_INT
 # ---------------------------
 # Check if strerror_r() returns int (POSIX) rather than char * (GNU libc).
 # If so, define STRERROR_R_INT.
 # The result is uncertain if strerror_r() isn't provided,
 # but we don't much care.
 AC_DEFUN([PGAC_FUNC_STRERROR_R_INT],
 [AC_CACHE_CHECK(whether strerror_r returns int,
 pgac_cv_func_strerror_r_int,
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <string.h>],
 [[char buf[100];
   switch (strerror_r(1, buf, sizeof(buf)))
   { case 0: break; default: break; }
 ]])],
 [pgac_cv_func_strerror_r_int=yes],
 [pgac_cv_func_strerror_r_int=no])])
 if test x"$pgac_cv_func_strerror_r_int" = xyes ; then
   AC_DEFINE(STRERROR_R_INT, 1,
             [Define to 1 if strerror_r() returns int.])
 fi
 ])# PGAC_FUNC_STRERROR_R_INT


 # PGAC_UNION_SEMUN
 # ----------------
 # Check if `union semun' exists. Define HAVE_UNION_SEMUN if so.
 # If it doesn't then one could define it as
 # union semun { int val; struct semid_ds *buf; unsigned short *array; }
 AC_DEFUN([PGAC_UNION_SEMUN],
 [AC_CHECK_TYPES([union semun], [], [],
 [#include <sys/types.h>
 #ifdef HAVE_SYS_IPC_H
 #include <sys/ipc.h>
 #endif
 #ifdef HAVE_SYS_SEM_H
 #include <sys/sem.h>
 #endif])])# PGAC_UNION_SEMUN


 # PGAC_STRUCT_SOCKADDR_UN
 # -----------------------
 # If `struct sockaddr_un' exists, define HAVE_STRUCT_SOCKADDR_UN.
 # If it is missing then one could define it.
 # (Requires test for <sys/un.h>!)
 AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
 [AC_CHECK_TYPES([struct sockaddr_un], [], [],
 [#include <sys/types.h>
 #ifdef HAVE_SYS_UN_H
 #include <sys/un.h>
 #endif
 ])])# PGAC_STRUCT_SOCKADDR_UN


 # PGAC_STRUCT_SOCKADDR_STORAGE
 # ----------------------------
 # If `struct sockaddr_storage' exists, define HAVE_STRUCT_SOCKADDR_STORAGE.
 # If it is missing then one could define it.
 AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE],
 [AC_CHECK_TYPES([struct sockaddr_storage], [], [],
 [#include <sys/types.h>
 #include <sys/socket.h>
 ])])# PGAC_STRUCT_SOCKADDR_STORAGE

 # PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
 # --------------------------------------
 # Check the members of `struct sockaddr_storage'.  We need to know about
 # ss_family and ss_len.  (Some platforms follow RFC 2553 and call them
 # __ss_family and __ss_len.)  We also check struct sockaddr's sa_len;
 # if we have to define our own `struct sockaddr_storage', this tells us
 # whether we need to provide an ss_len field.
 AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS],
 [AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family,
 		   struct sockaddr_storage.__ss_family,
 		   struct sockaddr_storage.ss_len,
 		   struct sockaddr_storage.__ss_len,
 		   struct sockaddr.sa_len], [], [],
 [#include <sys/types.h>
 #include <sys/socket.h>
 ])])# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS


 # PGAC_STRUCT_ADDRINFO
 # -----------------------
 # If `struct addrinfo' exists, define HAVE_STRUCT_ADDRINFO.
 AC_DEFUN([PGAC_STRUCT_ADDRINFO],
 [AC_CHECK_TYPES([struct addrinfo], [], [],
 [#include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 ])])# PGAC_STRUCT_ADDRINFO


 # PGAC_TYPE_LOCALE_T
 # ------------------
 # Check for the locale_t type and find the right header file.  macOS
 # needs xlocale.h; standard is locale.h, but glibc also has an
 # xlocale.h file that we should not use.
 #
 AC_DEFUN([PGAC_TYPE_LOCALE_T],
 [AC_CACHE_CHECK([for locale_t], pgac_cv_type_locale_t,
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [#include <locale.h>
 locale_t x;],
 [])],
 [pgac_cv_type_locale_t=yes],
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [#include <xlocale.h>
 locale_t x;],
 [])],
 [pgac_cv_type_locale_t='yes (in xlocale.h)'],
 [pgac_cv_type_locale_t=no])])])
 if test "$pgac_cv_type_locale_t" != no; then
   AC_DEFINE(HAVE_LOCALE_T, 1,
             [Define to 1 if the system has the type `locale_t'.])
 fi
 if test "$pgac_cv_type_locale_t" = 'yes (in xlocale.h)'; then
   AC_DEFINE(LOCALE_T_IN_XLOCALE, 1,
             [Define to 1 if `locale_t' requires <xlocale.h>.])
 fi])# PGAC_TYPE_LOCALE_T


 # PGAC_FUNC_WCSTOMBS_L
 # --------------------
 # Try to find a declaration for wcstombs_l().  It might be in stdlib.h
 # (following the POSIX requirement for wcstombs()), or in locale.h, or in
 # xlocale.h.  If it's in the latter, define WCSTOMBS_L_IN_XLOCALE.
 #
 AC_DEFUN([PGAC_FUNC_WCSTOMBS_L],
 [AC_CACHE_CHECK([for wcstombs_l declaration], pgac_cv_func_wcstombs_l,
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [#include <stdlib.h>
 #include <locale.h>],
 [#ifndef wcstombs_l
 (void) wcstombs_l;
 #endif])],
 [pgac_cv_func_wcstombs_l='yes'],
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [#include <stdlib.h>
 #include <locale.h>
 #include <xlocale.h>],
 [#ifndef wcstombs_l
 (void) wcstombs_l;
 #endif])],
 [pgac_cv_func_wcstombs_l='yes (in xlocale.h)'],
 [pgac_cv_func_wcstombs_l='no'])])])
 if test "$pgac_cv_func_wcstombs_l" = 'yes (in xlocale.h)'; then
   AC_DEFINE(WCSTOMBS_L_IN_XLOCALE, 1,
             [Define to 1 if `wcstombs_l' requires <xlocale.h>.])
 fi])# PGAC_FUNC_WCSTOMBS_L
	# Macros that test various C library quirks
	# config/c-library.m4


	# PGAC_VAR_INT_TIMEZONE
	# ---------------------
	# Check if the global variable `timezone' exists. If so, define
	# HAVE_INT_TIMEZONE.
	AC_DEFUN([PGAC_VAR_INT_TIMEZONE],
	[AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>
	int res;],
	[#ifndef __CYGWIN__
	res = timezone / 60;
	#else
	res = _timezone / 60;
	#endif])],
	[pgac_cv_var_int_timezone=yes],
	[pgac_cv_var_int_timezone=no])])
	if test x"$pgac_cv_var_int_timezone" = xyes ; then
	AC_DEFINE(HAVE_INT_TIMEZONE, 1,
	[Define to 1 if you have the global variable 'int timezone'.])
	fi])# PGAC_VAR_INT_TIMEZONE


	# PGAC_STRUCT_TIMEZONE
	# ------------------
	# Figure out how to get the current timezone. If `struct tm' has a
	# `tm_zone' member, define `HAVE_STRUCT_TM_TM_ZONE'. Unlike the
	# standard macro AC_STRUCT_TIMEZONE, we don't check for `tzname[]' if
	# not found, since we don't use it. (We use `int timezone' as a
	# fallback.)
	AC_DEFUN([PGAC_STRUCT_TIMEZONE],
	[AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <sys/types.h>
	#include <time.h>
	])
	])# PGAC_STRUCT_TIMEZONE


	# PGAC_FUNC_GETTIMEOFDAY_1ARG
	# ---------------------------
	# Check if gettimeofday() has only one arguments. (Normal is two.)
	# If so, define GETTIMEOFDAY_1ARG.
	AC_DEFUN([PGAC_FUNC_GETTIMEOFDAY_1ARG],
	[AC_CACHE_CHECK(whether gettimeofday takes only one argument,
	pgac_cv_func_gettimeofday_1arg,
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/time.h>],
	[struct timeval *tp = 0;
	struct timezone *tzp = 0;
	gettimeofday(tp,tzp);])],
	[pgac_cv_func_gettimeofday_1arg=no],
	[pgac_cv_func_gettimeofday_1arg=yes])])
	if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
	AC_DEFINE(GETTIMEOFDAY_1ARG, 1,
	[Define to 1 if gettimeofday() takes only 1 argument.])
	fi
	AH_VERBATIM(GETTIMEOFDAY_1ARG_,
	[@%:@ifdef GETTIMEOFDAY_1ARG
	@%:@ define gettimeofday(a,b) gettimeofday(a)
	@%:@endif])dnl
	])# PGAC_FUNC_GETTIMEOFDAY_1ARG


	# PGAC_FUNC_STRERROR_R_INT
	# ---------------------------
	# Check if strerror_r() returns int (POSIX) rather than char * (GNU libc).
	# If so, define STRERROR_R_INT.
	# The result is uncertain if strerror_r() isn't provided,
	# but we don't much care.
	AC_DEFUN([PGAC_FUNC_STRERROR_R_INT],
	[AC_CACHE_CHECK(whether strerror_r returns int,
	pgac_cv_func_strerror_r_int,
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <string.h>],
	[[char buf[100];
	switch (strerror_r(1, buf, sizeof(buf)))
	{ case 0: break; default: break; }
	]])],
	[pgac_cv_func_strerror_r_int=yes],
	[pgac_cv_func_strerror_r_int=no])])
	if test x"$pgac_cv_func_strerror_r_int" = xyes ; then
	AC_DEFINE(STRERROR_R_INT, 1,
	[Define to 1 if strerror_r() returns int.])
	fi
	])# PGAC_FUNC_STRERROR_R_INT


	# PGAC_UNION_SEMUN
	# ----------------
	# Check if `union semun' exists. Define HAVE_UNION_SEMUN if so.
	# If it doesn't then one could define it as
	# union semun { int val; struct semid_ds buf; unsigned short array; }
	AC_DEFUN([PGAC_UNION_SEMUN],
	[AC_CHECK_TYPES([union semun], [], [],
	[#include <sys/types.h>
	#ifdef HAVE_SYS_IPC_H
	#include <sys/ipc.h>
	#endif
	#ifdef HAVE_SYS_SEM_H
	#include <sys/sem.h>
	#endif])])# PGAC_UNION_SEMUN


	# PGAC_STRUCT_SOCKADDR_UN
	# -----------------------
	# If `struct sockaddr_un' exists, define HAVE_STRUCT_SOCKADDR_UN.
	# If it is missing then one could define it.
	# (Requires test for <sys/un.h>!)
	AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
	[AC_CHECK_TYPES([struct sockaddr_un], [], [],
	[#include <sys/types.h>
	#ifdef HAVE_SYS_UN_H
	#include <sys/un.h>
	#endif
	])])# PGAC_STRUCT_SOCKADDR_UN


	# PGAC_STRUCT_SOCKADDR_STORAGE
	# ----------------------------
	# If `struct sockaddr_storage' exists, define HAVE_STRUCT_SOCKADDR_STORAGE.
	# If it is missing then one could define it.
	AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE],
	[AC_CHECK_TYPES([struct sockaddr_storage], [], [],
	[#include <sys/types.h>
	#include <sys/socket.h>
	])])# PGAC_STRUCT_SOCKADDR_STORAGE

	# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
	# --------------------------------------
	# Check the members of `struct sockaddr_storage'. We need to know about
	# ss_family and ss_len. (Some platforms follow RFC 2553 and call them
	# __ss_family and __ss_len.) We also check struct sockaddr's sa_len;
	# if we have to define our own `struct sockaddr_storage', this tells us
	# whether we need to provide an ss_len field.
	AC_DEFUN([PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS],
	[AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family,
	struct sockaddr_storage.__ss_family,
	struct sockaddr_storage.ss_len,
	struct sockaddr_storage.__ss_len,
	struct sockaddr.sa_len], [], [],
	[#include <sys/types.h>
	#include <sys/socket.h>
	])])# PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS


	# PGAC_STRUCT_ADDRINFO
	# -----------------------
	# If `struct addrinfo' exists, define HAVE_STRUCT_ADDRINFO.
	AC_DEFUN([PGAC_STRUCT_ADDRINFO],
	[AC_CHECK_TYPES([struct addrinfo], [], [],
	[#include <sys/types.h>
	#include <sys/socket.h>
	#include <netdb.h>
	])])# PGAC_STRUCT_ADDRINFO


	# PGAC_TYPE_LOCALE_T
	# ------------------
	# Check for the locale_t type and find the right header file. macOS
	# needs xlocale.h; standard is locale.h, but glibc also has an
	# xlocale.h file that we should not use.
	#
	AC_DEFUN([PGAC_TYPE_LOCALE_T],
	[AC_CACHE_CHECK([for locale_t], pgac_cv_type_locale_t,
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[#include <locale.h>
	locale_t x;],
	[])],
	[pgac_cv_type_locale_t=yes],
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[#include <xlocale.h>
	locale_t x;],
	[])],
	[pgac_cv_type_locale_t='yes (in xlocale.h)'],
	[pgac_cv_type_locale_t=no])])])
	if test "$pgac_cv_type_locale_t" != no; then
	AC_DEFINE(HAVE_LOCALE_T, 1,
	[Define to 1 if the system has the type `locale_t'.])
	fi
	if test "$pgac_cv_type_locale_t" = 'yes (in xlocale.h)'; then
	AC_DEFINE(LOCALE_T_IN_XLOCALE, 1,
	[Define to 1 if `locale_t' requires <xlocale.h>.])
	fi])# PGAC_TYPE_LOCALE_T


	# PGAC_FUNC_WCSTOMBS_L
	# --------------------
	# Try to find a declaration for wcstombs_l(). It might be in stdlib.h
	# (following the POSIX requirement for wcstombs()), or in locale.h, or in
	# xlocale.h. If it's in the latter, define WCSTOMBS_L_IN_XLOCALE.
	#
	AC_DEFUN([PGAC_FUNC_WCSTOMBS_L],
	[AC_CACHE_CHECK([for wcstombs_l declaration], pgac_cv_func_wcstombs_l,
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[#include <stdlib.h>
	#include <locale.h>],
	[#ifndef wcstombs_l
	(void) wcstombs_l;
	#endif])],
	[pgac_cv_func_wcstombs_l='yes'],
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[#include <stdlib.h>
	#include <locale.h>
	#include <xlocale.h>],
	[#ifndef wcstombs_l
	(void) wcstombs_l;
	#endif])],
	[pgac_cv_func_wcstombs_l='yes (in xlocale.h)'],
	[pgac_cv_func_wcstombs_l='no'])])])
	if test "$pgac_cv_func_wcstombs_l" = 'yes (in xlocale.h)'; then
	AC_DEFINE(WCSTOMBS_L_IN_XLOCALE, 1,
	[Define to 1 if `wcstombs_l' requires <xlocale.h>.])
	fi])# PGAC_FUNC_WCSTOMBS_L