[binutils-gdb] Clarify .arch_extension possible values

[Thomas Preud'homme <thopre01 at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=8811c8f495557bb05a65d2c09eb529e2675b6a57

commit 8811c8f495557bb05a65d2c09eb529e2675b6a57
Author: Thomas Preud'homme <thomas.preudhomme@arm.com>
Date:   Tue Feb 20 12:48:50 2018 +0000

    Clarify .arch_extension possible values
    
    Documentation for .arch_extension says it accepts the same architectural
    extensions as those accepted by -mcpu. Given the name and the fact that
    -march for obvious reason also accept the same extensions, I believe
    it's worth mentioning that it accepts the same extensions as both
    -march and -mcpu. This commit addresses that.
    
    2018-02-20  Thomas Preud'homme  <thomas.preudhomme@arm.com>
    
    gas/
    	* doc/c-arm.texi (.arch_extension): Mention extensions it accepts are
    	also the same as -march.

Diff:
---
 gas/ChangeLog      | 5 +++++
 gas/doc/c-arm.texi | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gas/ChangeLog b/gas/ChangeLog
index bb827aa..19fb02f 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2018-02-20  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* doc/c-arm.texi (.arch_extension): Mention extensions it accepts are
+	also the same as -march.
+
 2018-02-17  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* NEWS: Mention .nop directive.
diff --git a/gas/doc/c-arm.texi b/gas/doc/c-arm.texi
index ec0f544..f67696f 100644
--- a/gas/doc/c-arm.texi
+++ b/gas/doc/c-arm.texi
@@ -631,7 +631,7 @@ extensions.
 @item .arch_extension @var{name}
 Add or remove an architecture extension to the target architecture.  Valid
 values for @var{name} are the same as those accepted as architectural
-extensions by the @option{-mcpu} commandline option.
+extensions by the @option{-mcpu} and @option{-march} commandline options.
 
 @code{.arch_extension} may be used multiple times to add or remove extensions
 incrementally to the architecture being compiled for.