program_invocation_name.m4 revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1# We need to be careful to avoid having the reference to
2# program_invocation_name optimized out.  We do that by
3# returning the value.
4
5AC_DEFUN([AC_PROGRAM_INVOCATION_NAME],
6  [AC_CACHE_CHECK(
7    for program_invocation_name,
8    ac_cv_have_program_invocation_name,
9    AC_TRY_LINK([extern char* program_invocation_name;],
10	        [return *program_invocation_name;],
11	        [ac_cv_have_program_invocation_name=yes],
12		[ac_cv_have_program_invocation_name=no])
13   )
14   if test "$ac_cv_have_program_invocation_name" = "yes"; then
15     AC_DEFINE(HAVE_PROGRAM_INVOCATION_NAME, 1,
16               [define if libc has program_invocation_name])
17   fi
18   ])
19   
20