[GAS/ARM] Fix selected_cpu with default CPU and -mcpu

When GAS is compiled with DEFAULT_CPU set and then run with a -mcpu or
-march option, selected_cpu will be set to the default CPU. This means
the -mcpu is ignored which is surprising behavior. This commit instead
sets selected_cpu from the value passed to -mcpu/-march.

2017-03-24  Thomas preud'homme  <thomas.preudhomme@arm.com>

gas/
	* config/tc-arm.: (md_begin): Set selected_cpu from *mcpu_cpu_opt when
	CPU_DEFAULT is defined.

1 files changed, 2 insertions, 2 deletions

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index ef6b609..bbfe634 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -25040,8 +25040,8 @@ md_begin (void)
       mcpu_cpu_opt = &cpu_default;
       selected_cpu = cpu_default;
     }
-  else if (no_cpu_selected ())
-    selected_cpu = cpu_default;
+  else
+    selected_cpu = *mcpu_cpu_opt;
 #else
   if (mcpu_cpu_opt)
     selected_cpu = *mcpu_cpu_opt;