[please don't top-post on technical lists]
On 10/12/2010 02:34 PM, Ralph Castain wrote:
Sorry for delay - was out. Since the code is rather long, I have simply
attached it here.
Appreciate your help!
You're welcome!
AC_DEFUN([EVENT_CHECK_ATTRIBUTES], [
AC_LANG(C)
AC_MSG_CHECKING(for __attribute__)
AC_CACHE_VAL(_cv___attribute__, [
AC_TRY_COMPILE(
[#include <stdlib.h>
/* Check for the longest available __attribute__ (since gcc-2.3) */
struct foo {
char a;
int x[2] __attribute__ ((__packed__));
};
],
Bingo. Just as the warning said, you are missing a call to
AC_LANG_PROGRAM. Also, you have insufficient quoting - to get an array
x[2], rather than a variable name x2, you need more [] quoting. You
want to do:
AC_TRY_COMPILE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
/* Check ... */
struct foo {
char a;
int x[2] __attribute__ ((__packed__));
};
]])],
and then on with the rest of your .m4 file.
[],
[_cv___attribute__=1],
[_cv___attribute__=0],
Also, while you're at it, it might be nice to rename your cache
variables to have a useful prefix, rather than being in the nameless
prefix namespace.
)
if test "$_cv___attribute__" = "1" ; then
AC_TRY_COMPILE(
[#include <stdlib.h>
Rinse and repeat - another missing AC_LANG_PROGRAM.
AC_DEFINE_UNQUOTED(HAVE_ATTRIBUTE, [$_cv___attribute__],
[Whether your compiler has __attribute__ or not])
Get in the habit of proper m4 quoting:
AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE], [$_cv__attribute__], ...
AC_DEFUN([IF_IFELSE], [
AC_COMPILE_IFELSE([#if !( $1 )
#error "condition $1 not met"
choke me
#endif], [$2], [$3])])
Another case of missing AC_LANG_PROGRAM.
[AC_TRY_LINK([
#include <stdio.h>
And another.
AC_CACHE_CHECK([if $CC supports -xldscope],
[_cv_cc_xldscope],
[AC_TRY_LINK([
#include <stdio.h>
And another.
I think you can go from here on fixing this.
--
Eric Blake [email protected] +1-801-349-2682
Libvirt virtualization library http://libvirt.org
