# $Id: types.ac,v 11.10 2001/12/10 14:16:49 bostic Exp $# db.h includes <sys/types.h> and <stdio.h>, not the other default includes# autoconf usually includes.  For that reason, we specify a set of includes# for all type checking tests. [#5060]AC_DEFUN(DB_INCLUDES, [[#include <sys/types.h>#include <stdio.h>]])# Check the sizes we know about, and see if any of them match what's needed.## Prefer ints to anything else, because read, write and others historically# returned an int.AC_DEFUN(AM_SEARCH_USIZES, [	case "$3" in	"$ac_cv_sizeof_unsigned_int")		$1="typedef unsigned int $2;";;	"$ac_cv_sizeof_unsigned_char")		$1="typedef unsigned char $2;";;	"$ac_cv_sizeof_unsigned_short")		$1="typedef unsigned short $2;";;	"$ac_cv_sizeof_unsigned_long")		$1="typedef unsigned long $2;";;	*)		AC_MSG_ERROR([No unsigned $3-byte integral type]);;	esac])AC_DEFUN(AM_SEARCH_SSIZES, [	case "$3" in	"$ac_cv_sizeof_int")		$1="typedef int $2;";;	"$ac_cv_sizeof_char")		$1="typedef char $2;";;	"$ac_cv_sizeof_short")		$1="typedef short $2;";;	"$ac_cv_sizeof_long")		$1="typedef long $2;";;	*)		AC_MSG_ERROR([No signed $3-byte integral type]);;	esac])# Check for the standard system types.AC_DEFUN(AM_TYPES, [# We need to know the sizes of various objects on this system.# We don't use the SIZEOF_XXX values created by autoconf.AC_CHECK_SIZEOF(char,, DB_INCLUDES)AC_CHECK_SIZEOF(unsigned char,, DB_INCLUDES)AC_CHECK_SIZEOF(short,, DB_INCLUDES)AC_CHECK_SIZEOF(unsigned short,, DB_INCLUDES)AC_CHECK_SIZEOF(int,, DB_INCLUDES)AC_CHECK_SIZEOF(unsigned int,, DB_INCLUDES)AC_CHECK_SIZEOF(long,, DB_INCLUDES)AC_CHECK_SIZEOF(unsigned long,, DB_INCLUDES)AC_CHECK_SIZEOF(size_t,, DB_INCLUDES)AC_CHECK_SIZEOF(char *,, DB_INCLUDES)# We require off_t and size_t, and we don't try to substitute our own# if we can't find them.AC_CHECK_TYPE(off_t,,, DB_INCLUDES)if test "$ac_cv_type_off_t" = no; then	AC_MSG_ERROR([No off_t type.])fiAC_CHECK_TYPE(size_t,,, DB_INCLUDES)if test "$ac_cv_type_size_t" = no; then	AC_MSG_ERROR([No size_t type.])fi# We look for u_char, u_short, u_int, u_long -- if we can't find them,# we create our own.AC_SUBST(u_char_decl)AC_CHECK_TYPE(u_char,,, DB_INCLUDES)if test "$ac_cv_type_u_char" = no; then	u_char_decl="typedef unsigned char u_char;"fiAC_SUBST(u_short_decl)AC_CHECK_TYPE(u_short,,, DB_INCLUDES)if test "$ac_cv_type_u_short" = no; then	u_short_decl="typedef unsigned short u_short;"fiAC_SUBST(u_int_decl)AC_CHECK_TYPE(u_int,,, DB_INCLUDES)if test "$ac_cv_type_u_int" = no; then	u_int_decl="typedef unsigned int u_int;"fiAC_SUBST(u_long_decl)AC_CHECK_TYPE(u_long,,, DB_INCLUDES)if test "$ac_cv_type_u_long" = no; then	u_long_decl="typedef unsigned long u_long;"fiAC_SUBST(u_int8_decl)AC_CHECK_TYPE(u_int8_t,,, DB_INCLUDES)if test "$ac_cv_type_u_int8_t" = no; then	AM_SEARCH_USIZES(u_int8_decl, u_int8_t, 1)fiAC_SUBST(u_int16_decl)AC_CHECK_TYPE(u_int16_t,,, DB_INCLUDES)if test "$ac_cv_type_u_int16_t" = no; then	AM_SEARCH_USIZES(u_int16_decl, u_int16_t, 2)fiAC_SUBST(int16_decl)AC_CHECK_TYPE(int16_t,,, DB_INCLUDES)if test "$ac_cv_type_int16_t" = no; then	AM_SEARCH_SSIZES(int16_decl, int16_t, 2)fiAC_SUBST(u_int32_decl)AC_CHECK_TYPE(u_int32_t,,, DB_INCLUDES)if test "$ac_cv_type_u_int32_t" = no; then	AM_SEARCH_USIZES(u_int32_decl, u_int32_t, 4)fiAC_SUBST(int32_decl)AC_CHECK_TYPE(int32_t,,, DB_INCLUDES)if test "$ac_cv_type_int32_t" = no; then	AM_SEARCH_SSIZES(int32_decl, int32_t, 4)fi# Check for ssize_t -- if none exists, find a signed integral type that's# the same size as a size_t.AC_SUBST(ssize_t_decl)AC_CHECK_TYPE(ssize_t,,, DB_INCLUDES)if test "$ac_cv_type_ssize_t" = no; then	AM_SEARCH_SSIZES(ssize_t_decl, ssize_t, $ac_cv_sizeof_size_t)fi# Find the largest integral type.AC_SUBST(db_align_t_decl)AC_CHECK_TYPE(unsigned long long,,, DB_INCLUDES)if test "$ac_cv_type_unsigned_long_long" = no; then	db_align_t_decl="typedef unsigned long db_align_t;"else	db_align_t_decl="typedef unsigned long long db_align_t;"fi# Find an integral type which is the same size as a pointer.AC_SUBST(db_alignp_t_decl)AM_SEARCH_USIZES(db_alignp_t_decl, db_alignp_t, $ac_cv_sizeof_char_p)])