--- a/ChangeLog	Wed Aug 22 17:59:49 2018 -0700
+++ b/ChangeLog	Thu Aug 23 21:13:19 2018 +0200
@@ -1,3 +1,12 @@
+2018-08-23  Bruno Haible  <bruno@clisp.org>
+
+	getcwd: Add cross-compilation guesses.
+	Reported by Sergio Durigan Junior <sergiodj@redhat.com> in
+	<https://lists.gnu.org/archive/html/bug-gnulib/2018-08/msg00130.html>.
+	Based on a patch by Paul Eggert.
+	* m4/getcwd-path-max.m4 (gl_FUNC_GETCWD_PATH_MAX): Add cross-compilation
+	guesses for all GNU systems.
+
 2018-08-19  Bruno Haible  <bruno@clisp.org>
 
 	glob-h: Formalize side effects from other modules.

--- a/m4/getcwd-path-max.m4	Wed Aug 22 17:59:49 2018 -0700
+++ b/m4/getcwd-path-max.m4	Thu Aug 23 21:13:19 2018 +0200
@@ -1,4 +1,4 @@
-# serial 20
+# serial 21
 # Check for several getcwd bugs with long file names.
 # If so, arrange to compile the wrapper function.
 
@@ -209,9 +209,21 @@
         32) gl_cv_func_getcwd_path_max='yes, but with shorter paths';;
         *) gl_cv_func_getcwd_path_max=no;;
         esac],
-       [case "$host_os" in
-          aix*) gl_cv_func_getcwd_path_max='no, it has the AIX bug';;
-          *) gl_cv_func_getcwd_path_max=no;;
-        esac])
+       [# Cross-compilation guesses:
+        case "$host_os" in
+          aix*) # On AIX, it has the AIX bug.
+            gl_cv_func_getcwd_path_max='no, it has the AIX bug' ;;
+          gnu*) # On Hurd, it is 'yes'.
+            gl_cv_func_getcwd_path_max=yes ;;
+          linux* | kfreebsd*)
+            # On older Linux+glibc it's 'no, but it is partly working',
+            # on newer Linux+glibc it's 'yes'.
+            # On Linux+musl libc, it's 'no, but it is partly working'.
+            # On kFreeBSD+glibc, it's 'no, but it is partly working'.
+            gl_cv_func_getcwd_path_max='no, but it is partly working' ;;
+          *) # If we don't know, assume the worst.
+            gl_cv_func_getcwd_path_max=no ;;
+        esac
+       ])
     ])
 ])