Commit: Avoid linker testsuite warnings about missing compilers

[Alan Modra]

On Thu, Aug 11, 2016 at 10:27:02AM +0100, Nick Clifton wrote:
> Hi Guys
> 
>   A lot of errors like this:
> 
>     LD ERROR: x86_64-solaris2-gcc does not exist 

Hi Nick,

Also: ERROR: can't decipher gcc version number, fix the framework!

I hope you don't mind me replacing your fix with one that should work
on remote hosts too.  (I had this in my tree before seeing your
patch.)  The real problem is that the status of the remote_exec isn't
checked.

	PR ld/20436
	* testsuite/lib/ld-lib.exp (at_least_gcc_version): Don't ignore
	remote_exec status.
	(check_gcc_plugin_enabled): Likewise.

diff --git a/ld/testsuite/lib/ld-lib.exp b/ld/testsuite/lib/ld-lib.exp
index 23055be..7b190be 100644
--- a/ld/testsuite/lib/ld-lib.exp
+++ b/ld/testsuite/lib/ld-lib.exp
@@ -35,9 +35,12 @@ proc at_least_gcc_version { major minor } {
 	set CC [find_gcc]
     }
     if { $CC == "" } {
-      return 0
+	return 0
     }
     set state [remote_exec host $CC --version]
+    if { [lindex $state 0] != 0 } {
+	return 0;
+    }
     set tmp "[lindex $state 1]\n"
     # Look for (eg) 4.6.1 in the version output.
     set ver_re "\[^\\.0-9\]+(\[1-9\]\[0-9\]*)\\.(\[0-9\]+)(?:\\.\[0-9\]+)?"
@@ -1816,13 +1819,13 @@ proc check_gcc_plugin_enabled { } {
 	set CC [find_gcc]
     }
     if { $CC == ""} {
-      return 0
-    }
-    if { ![is_remote host] && [which $CC] == 0 } then {
-      return 0
+	return 0
     }
     set state [remote_exec host $CC -v]
-    for { set i 0 } { $i < [llength $state] } { incr i } {
+    if { [lindex $state 0] != 0 } {
+	return 0;
+    }
+    for { set i 1 } { $i < [llength $state] } { incr i } {
 	set v [lindex $state $i]
 	if { [ string match "*--disable-plugin*" $v ] } {
 	    verbose "plugin is disabled by $v"

-- 
Alan Modra
Australia Development Lab, IBM