configure: Fail on enabling sysfsgpio on non-linux OS

Change-Id: I5036d8eca6a6e6ed47e3b9ff78bc3a3bf34491fb
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3888
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

diff --git a/configure.ac b/configure.ac
index 0935c752218674bb66946ea4e50b6dcc0880dff2..f7deae494596240617d40687140425db499703b3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -316,6 +316,14 @@ AC_ARG_ENABLE([sysfsgpio],
   AS_HELP_STRING([--enable-sysfsgpio], [Enable building support for programming driven via sysfs gpios.]),
   [build_sysfsgpio=$enableval], [build_sysfsgpio=no])
 
+AS_CASE([$host_os],
+  [linux*], [],
+  [
+    AS_IF([test "x$build_sysfsgpio" = "xyes"], [
+      AC_MSG_ERROR([sysfsgpio is only available on linux])
+    ])
+])
+
 AC_ARG_ENABLE([minidriver_dummy],
   AS_HELP_STRING([--enable-minidriver-dummy], [Enable the dummy minidriver.]),
   [build_minidriver_dummy=$enableval], [build_minidriver_dummy=no])