-if test "$GCC" = yes
-then
-cat > conftest.i <<EOF
-#ifndef GCC_PRINTF
-#define GCC_PRINTF 0
-#endif
-#ifndef GCC_SCANF
-#define GCC_SCANF 0
-#endif
-#ifndef GCC_NORETURN
-#define GCC_NORETURN /* nothing */
-#endif
-#ifndef GCC_UNUSED
-#define GCC_UNUSED /* nothing */
-#endif
-EOF
-if test "$GCC" = yes
-then
- { echo "$as_me:16561: checking for $CC __attribute__ directives..." >&5
-echo "$as_me: checking for $CC __attribute__ directives..." >&6;}
-cat > conftest.$ac_ext <<EOF
-#line 16564 "${as_me:-configure}"
-#include "confdefs.h"
-#include "conftest.h"
-#include "conftest.i"
-#if GCC_PRINTF
-#define GCC_PRINTFLIKE(fmt,var) __attribute__((format(printf,fmt,var)))
-#else
-#define GCC_PRINTFLIKE(fmt,var) /*nothing*/
-#endif
-#if GCC_SCANF
-#define GCC_SCANFLIKE(fmt,var) __attribute__((format(scanf,fmt,var)))
-#else
-#define GCC_SCANFLIKE(fmt,var) /*nothing*/
-#endif
-extern void wow(char *,...) GCC_SCANFLIKE(1,2);
-extern void oops(char *,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
-extern void foo(void) GCC_NORETURN;
-int main(int argc GCC_UNUSED, char *argv[] GCC_UNUSED) { (void)argc; (void)argv; return 0; }
-EOF
- cf_printf_attribute=no
- cf_scanf_attribute=no
- for cf_attribute in scanf printf unused noreturn
- do
-
-cf_ATTRIBUTE=`echo "$cf_attribute" | sed y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%`
-
- cf_directive="__attribute__(($cf_attribute))"
- echo "checking for $CC $cf_directive" 1>&5
-
- case $cf_attribute in
- (printf)
- cf_printf_attribute=yes
- cat >conftest.h <<EOF
-#define GCC_$cf_ATTRIBUTE 1
-EOF
- ;;
- (scanf)
- cf_scanf_attribute=yes
- cat >conftest.h <<EOF
-#define GCC_$cf_ATTRIBUTE 1
-EOF
- ;;
- (*)
- cat >conftest.h <<EOF
-#define GCC_$cf_ATTRIBUTE $cf_directive
-EOF
- ;;
- esac
-
- if { (eval echo "$as_me:16613: \"$ac_compile\"") >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- echo "$as_me:16616: \$? = $ac_status" >&5
- (exit $ac_status); }; then
- test -n "$verbose" && echo "$as_me:16618: result: ... $cf_attribute" >&5
-echo "${ECHO_T}... $cf_attribute" >&6
- cat conftest.h >>confdefs.h
- case $cf_attribute in
- (noreturn)
-
-cat >>confdefs.h <<EOF
-#define GCC_NORETURN $cf_directive
-EOF
-
- ;;
- (printf)
- cf_value='/* nothing */'
- if test "$cf_printf_attribute" != no ; then
- cf_value='__attribute__((format(printf,fmt,var)))'
-
-cat >>confdefs.h <<\EOF
-#define GCC_PRINTF 1
-EOF
-
- fi
-
-cat >>confdefs.h <<EOF
-#define GCC_PRINTFLIKE(fmt,var) $cf_value
-EOF
-
- ;;
- (scanf)
- cf_value='/* nothing */'
- if test "$cf_scanf_attribute" != no ; then
- cf_value='__attribute__((format(scanf,fmt,var)))'
-
-cat >>confdefs.h <<\EOF
-#define GCC_SCANF 1
-EOF
-
- fi
-
-cat >>confdefs.h <<EOF
-#define GCC_SCANFLIKE(fmt,var) $cf_value
-EOF
-
- ;;
- (unused)
-
-cat >>confdefs.h <<EOF
-#define GCC_UNUSED $cf_directive
-EOF
-
- ;;
- esac
- fi
- done
-else
- fgrep define conftest.i >>confdefs.h
-fi
-rm -rf conftest*
-fi
-
-echo "$as_me:16677: checking if you want to work around bogus compiler/loader warnings" >&5