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[/] [openrisc/] [tags/] [gnu-src/] [gdb-7.2/] [gdb-7.2-or32-1.0rc1/] [gdb/] [gnulib/] [m4/] [stddef_h.m4] - Rev 739
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dnl A placeholder for POSIX 2008 <stddef.h>, for platforms that have issues. # stddef_h.m4 serial 2 dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_STDDEF_H], [ AC_REQUIRE([gl_STDDEF_H_DEFAULTS]) AC_REQUIRE([gt_TYPE_WCHAR_T]) if test $gt_cv_c_wchar_t = no; then HAVE_WCHAR_T=0 STDDEF_H=stddef.h fi AC_CACHE_CHECK([whether NULL can be used in arbitrary expressions], [gl_cv_decl_null_works], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stddef.h> int test[2 * (sizeof NULL == sizeof (void *)) -1]; ]])], [gl_cv_decl_null_works=yes], [gl_cv_decl_null_works=no])]) if test $gl_cv_decl_null_works = no; then REPLACE_NULL=1 STDDEF_H=stddef.h fi if test -n "$STDDEF_H"; then gl_CHECK_NEXT_HEADERS([stddef.h]) fi ]) AC_DEFUN([gl_STDDEF_MODULE_INDICATOR], [ dnl Use AC_REQUIRE here, so that the default settings are expanded once only. AC_REQUIRE([gl_STDDEF_H_DEFAULTS]) gl_MODULE_INDICATOR_SET_VARIABLE([$1]) ]) AC_DEFUN([gl_STDDEF_H_DEFAULTS], [ dnl Assume proper GNU behavior unless another module says otherwise. REPLACE_NULL=0; AC_SUBST([REPLACE_NULL]) HAVE_WCHAR_T=1; AC_SUBST([HAVE_WCHAR_T]) STDDEF_H=''; AC_SUBST([STDDEF_H]) ])
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