external-xilinx-toolchain: Fix version detection for gcc

* Account for blank line in gcc -v output

Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/conf/distro/include/xilinx-versions.inc b/conf/distro/include/xilinx-versions.inc
index 8d39789c..4e44f07a 100644
--- a/conf/distro/include/xilinx-versions.inc
+++ b/conf/distro/include/xilinx-versions.inc
@@ -21,8 +21,11 @@ def csl_get_version(d):
                 bb.error('Make sure that MACHINE is set correctly in your local.conf and the toolchain supports %s.' % d.getVar("TARGET_ARCH", True))
                 return 'UNKNOWN'
         else:
-                last_line = stderr.splitlines()[-1]
-                return last_line
+                lines = stderr.splitlines()
+                for i in reversed(range(len(lines))):
+                        if len(lines[i]) != 0:
+                                return lines[i]
+                return 'UNKNOWN'
 
 def csl_get_main_version(d):
         version = csl_get_version(d)