Hello.
Consider the code snippet below. How to modify it to get the GNU version
of baseline if defined (in my case GNU/Hurd). The macro
AC_USE_SYSTEM_EXTENSIONS is stated earlier in configure.ac.
Something like:
>>>if defined _GNU_SOURCE<<<
<check for a working GNU basename>
...
[AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_GNU_SOURCE
# define _GNU_SOURCE 1
# include <string.h>
#endif
<same tests as below>
...
>>>else<<<
<use the code below>
>>>endif<<<
(Or shorter if possible)
Thanks in advance (so much to learn about auto*...)
>From configure.ac:
# COMPAT_FUNC_BASENAME
# --------------------
# Check for working basename() function.
AC_CHECK_HEADERS([libgen.h])
AC_DEFUN([COMPAT_FUNC_BASENAME], [
AC_DEFINE([NEED_BASENAME], 1,
[Define if you want to use the basename function])
AC_CHECK_HEADERS([libgen.h])
AC_CACHE_CHECK([for working basename],
[compat_cv_func_basename_works],
[AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_LIBGEN_H
# include <libgen.h>
#endif
typedef struct {
char *test;
char *result;
} test_t;
const test_t tests[] = {
{ "/usr/local/foo", "foo" },
{ "/usr/local/foo/", "foo" },
{ NULL, NULL }
};
int main() {
char test1[1024];
int i;
for (i = 0; tests[i].test; i++) {
strcpy(test1, tests[i].test);
if (strcmp(basename(test1), tests[i].result) ||
strcmp(test1, tests[i].test))
exit(1);
}
exit(0);
}
],
[compat_cv_func_basename_works=yes],
[compat_cv_func_basename_works=no],
[compat_cv_func_basename_works=no]
)]
)
if test "$compat_cv_func_basename_works" = "yes"; then
AC_DEFINE([HAVE_BASENAME], 1,
[Define if your system has a working basename])
else
AC_LIBOBJ([basename])
fi
])
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