Merge pull request #2468 from bridadan/fix-gcc-diagnostic-pattern

Tools - Fixing issue where GCC fails to report compile errors when non-verbose

tools/toolchains/gcc.py

@@ -138,7 +138,7 @@ class GCC(mbedToolchain):
         # The warning/error notification is multiline
         msg = None
         for line in output.splitlines():
-            match = GCC.DIAGNOSTIC_PATTERN.match(line)
+            match = GCC.DIAGNOSTIC_PATTERN.search(line)
             if match is not None:
                 if msg is not None:
                     self.cc_info(msg)