File aclocal.m4 artifact b683d44d9b part of check-in affd29c5ef

AC_DEFUN(DC_DO_WIN32, [
  AC_CHECK_HEADERS(windows.h windowsx.h)
])

AC_DEFUN(DC_DO_TYPE, [
	if test -z "$ac_cv_sizeof_long"; then
		AC_C_INLINE
		AC_CHECK_SIZEOF(long long, 8)
		AC_CHECK_SIZEOF(long, 4)
		AC_CHECK_SIZEOF(int, 4)
		AC_CHECK_SIZEOF(short, 2)
	fi
	FOUND=0
	for dc_cv_loop in \$ac_cv_sizeof_long_long \$ac_cv_sizeof_int \$ac_cv_sizeof_long \$ac_cv_sizeof_short; do
		dc_cv_size=`eval echo $dc_cv_loop`
		dc_cv_name=`echo $dc_cv_loop | sed s/\\\$ac_cv_sizeof_//`
		if test "$dc_cv_size" = "$3"; then
			if test "$dc_cv_name" = "int"; then 
				AC_CHECK_TYPE($1, $2 int)
			fi
			if test "$dc_cv_name" = "long"; then
				AC_CHECK_TYPE($1, $2 long)
			fi
			if test "$dc_cv_name" = "long_long"; then
				AC_CHECK_TYPE($1, $2 long long)
			fi
			if test "$dc_cv_name" = "short"; then
				AC_CHECK_TYPE($1, $2 short)
			fi
			FOUND=1
			break
		fi
	done
])

dnl Usage:
dnl    DC_TEST_SHOBJFLAGS(shobjflags, shobjldflags, action-if-not-found)
dnl
AC_DEFUN(DC_TEST_SHOBJFLAGS, [
  AC_SUBST(SHOBJFLAGS)
  AC_SUBST(SHOBJLDFLAGS)

  OLD_LDFLAGS="$LDFLAGS"
  SHOBJFLAGS=""

  LDFLAGS="$OLD_LDFLAGS $1 $2"

  AC_TRY_LINK([#include <stdio.h>
int unrestst(void);], [ printf("okay\n"); unrestst(); return(0); ], [ SHOBJFLAGS="$1"; SHOBJLDFLAGS="$2" ], [
  LDFLAGS="$OLD_LDFLAGS"
  $3
])

  LDFLAGS="$OLD_LDFLAGS"
])

AC_DEFUN(DC_GET_SHOBJFLAGS, [
  AC_MSG_CHECKING(how to create shared objects)

  DC_TEST_SHOBJFLAGS([-shared -fPIC], [-rdynamic], [
    DC_TEST_SHOBJFLAGS([-shared -fPIC], [], [
      DC_TEST_SHOBJFLAGS([-shared -fPIC], [-rdynamic -Wl,-G,-z,textoff], [
        DC_TEST_SHOBJFLAGS([-shared -fPIC], [-Wl,-G,-z,textoff], [
          AC_MSG_ERROR(cant)
        ])
      ])
    ])
  ])

  AC_MSG_RESULT($SHOBJLDFLAGS $SHOBJFLAGS)
])