Author: Helmut Grohne <helmut@subdivi.de>
Description: libpam-x2go FTCBFS: abuses AC_CHECK_FILES
Abstract:
 libpam-x2go fails to cross build from source, because m4/gtest.m4 abuses
 AC_CHECK_FILES. It uses the macro to check for files on the build
 system, while it is meant for checking files on the host system.

--- a/m4/gtest.m4
+++ b/m4/gtest.m4
@@ -49,8 +49,7 @@
 
   AC_LANG_POP
 
-  AC_CHECK_FILES([$GTEST_SOURCE/src/gtest-all.cc]
-                 [$GTEST_SOURCE/src/gtest_main.cc],
+  AS_IF([test -e "$GTEST_SOURCE/src/gtest-all.cc" || test -e "$GTEST_SOURCE/src/gtest_main.cc"],
                  [have_gtest_source=yes],
                  [have_gtest_source=no])