- [AC_TRY_RUN(
- [
-# include <stdlib.h>
-# include <unistd.h>
-# ifndef getcwd
- char *getcwd ();
-# endif
- int
- main ()
- {
- if (chdir ("/") != 0)
- exit (1);
- else
- {
- char *f = getcwd (NULL, 0);
- exit (! (f && f[0] == '/' && !f[1]));
- }
- }],
- [gl_cv_func_getcwd_null=yes],
- [gl_cv_func_getcwd_null=no],
- [gl_cv_func_getcwd_null=no])])
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+# include <unistd.h>
+# ifndef getcwd
+ char *getcwd ();
+# endif
+]], [[
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* mingw cwd does not start with '/', but getcwd does allocate.
+ However, mingw fails to honor non-zero size. */
+#else
+ if (chdir ("/") != 0)
+ return 1;
+ else
+ {
+ char *f = getcwd (NULL, 0);
+ if (! f)
+ return 2;
+ if (f[0] != '/')
+ return 3;
+ if (f[1] != '\0')
+ return 4;
+ return 0;
+ }
+#endif
+ /* If size is non-zero, allocation must fail if size is too small */
+ if (getcwd (NULL, 1))
+ return 5;
+ ]])],
+ [gl_cv_func_getcwd_null=yes],
+ [gl_cv_func_getcwd_null=no],
+ [[
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_getcwd_null="guessing yes";;
+ # Guess yes on Cygwin.
+ cygwin*) gl_cv_func_getcwd_null="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_getcwd_null="guessing no";;
+ esac
+ ]])])