- #
- # We can't use __attribute__, so we can't use __attribute__((unused)),
- # so we define _U_ to an empty string.
- #
- V_DEFS="$V_DEFS -D_U_=\"\""
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv___attribute__" >&5
-$as_echo "$ac_cv___attribute__" >&6; }
-
-if test "$ac_cv___attribute__" = "yes"; then
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __attribute__((unused)) can be used without warnings" >&5
-$as_echo_n "checking whether __attribute__((unused)) can be used without warnings... " >&6; }
-if ${ac_cv___attribute___unused+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
-save_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-#include <stdlib.h>
-#include <stdio.h>
-
-int
-main(int argc __attribute((unused)), char **argv __attribute((unused)))
-{
- printf("Hello, world!\n");
- return 0;
-}
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv___attribute___unused=yes
-else
- ac_cv___attribute___unused=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-
-CFLAGS="$save_CFLAGS"
-if test "$ac_cv___attribute___unused" = "yes"; then
- V_DEFS="$V_DEFS -D_U_=\"__attribute__((unused))\""
-else
- V_DEFS="$V_DEFS -D_U_=\"\""
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv___attribute___unused" >&5
-$as_echo "$ac_cv___attribute___unused" >&6; }
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __attribute__((noreturn)) can be applied to function pointers without warnings" >&5
-$as_echo_n "checking whether __attribute__((noreturn)) can be applied to function pointers without warnings... " >&6; }
-if ${ac_cv___attribute___noreturn_function_pointer+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
-save_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-#include <stdlib.h>
-
-extern int (*foo)(int i)
- __attribute__ ((noreturn));
-
-int
-main(int argc, char **argv)
-{
- (*foo)(1);
-}
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv___attribute___noreturn_function_pointer=yes
-else
- ac_cv___attribute___noreturn_function_pointer=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-
-CFLAGS="$save_CFLAGS"
-if test "$ac_cv___attribute___noreturn_function_pointer" = "yes"; then
-
-$as_echo "#define __ATTRIBUTE___NORETURN_OK_FOR_FUNCTION_POINTERS 1" >>confdefs.h
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv___attribute___noreturn_function_pointer" >&5
-$as_echo "$ac_cv___attribute___noreturn_function_pointer" >&6; }
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __attribute__((format)) can be used without warnings" >&5
-$as_echo_n "checking whether __attribute__((format)) can be used without warnings... " >&6; }
-if ${ac_cv___attribute___format+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
-save_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-#include <stdlib.h>
-
-extern int foo(const char *fmt, ...)
- __attribute__ ((format (printf, 1, 2)));
-
-int
-main(int argc, char **argv)
-{
- foo("%s", "test");
-}
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv___attribute___format=yes
-else
- ac_cv___attribute___format=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-
-CFLAGS="$save_CFLAGS"
-if test "$ac_cv___attribute___format" = "yes"; then
-
-$as_echo "#define __ATTRIBUTE___FORMAT_OK 1" >>confdefs.h
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv___attribute___format" >&5
-$as_echo "$ac_cv___attribute___format" >&6; }
-
- if test "$ac_cv___attribute___format" = "yes"; then
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether __attribute__((format)) can be applied to function pointers" >&5
-$as_echo_n "checking whether __attribute__((format)) can be applied to function pointers... " >&6; }
-if ${ac_cv___attribute___format_function_pointer+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-#include <stdlib.h>
-
-extern int (*foo)(const char *fmt, ...)
- __attribute__ ((format (printf, 1, 2)));
-
-int
-main(int argc, char **argv)
-{
- (*foo)("%s", "test");
-}
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv___attribute___format_function_pointer=yes
-else
- ac_cv___attribute___format_function_pointer=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-
-if test "$ac_cv___attribute___format_function_pointer" = "yes"; then
-
-$as_echo "#define __ATTRIBUTE___FORMAT_OK_FOR_FUNCTION_POINTERS 1" >>confdefs.h
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv___attribute___format_function_pointer" >&5
-$as_echo "$ac_cv___attribute___format_function_pointer" >&6; }
-
- fi
-fi
-
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
-$as_echo_n "checking how to run the C preprocessor... " >&6; }
-# On Suns, sometimes $CPP names a directory.
-if test -n "$CPP" && test -d "$CPP"; then
- CPP=
-fi
-if test -z "$CPP"; then
- if ${ac_cv_prog_CPP+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- # Double quotes because CPP needs to be expanded
- for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
- do
- ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
-do
- # Use a header file that comes with gcc, so configuring glibc
- # with a fresh cross-compiler works.
- # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
- # <limits.h> exists even on freestanding compilers.
- # On the NeXT, cc -E runs the code through the compiler's parser,
- # not just through cpp. "Syntax error" is here to catch this case.
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#ifdef __STDC__
-# include <limits.h>
-#else
-# include <assert.h>
-#endif
- Syntax error
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-
-else
- # Broken: fails on valid input.
-continue
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
- # OK, works on sane cases. Now check whether nonexistent headers
- # can be detected and how.
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#include <ac_nonexistent.h>
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
- # Broken: success on invalid input.
-continue
-else
- # Passes both tests.
-ac_preproc_ok=:
-break
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-
-done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.i conftest.err conftest.$ac_ext
-if $ac_preproc_ok; then :
- break
-fi
-
- done
- ac_cv_prog_CPP=$CPP
-
-fi
- CPP=$ac_cv_prog_CPP
-else
- ac_cv_prog_CPP=$CPP
projects / tcpdump / blobdiff