re PR libmudflap/49549 (Use of --noinhibit-exec is unportable)

	libmudflap:
	PR libmudflap/49549
	* testsuite/lib/libmudflap.exp (load_gcc_lib): Load
	target-supports.exp.
	* testsuite/libmudflap.cth/cthfrags.exp: Only pass
	--noinhibit-exec to GNU ld.

	gcc:
	PR libmudflap/49549
	* doc/sourcebuild.texi (Effective-Target Keywords): Document gld.

	gcc/testsuite:
	PR libmudflap/49549
	* lib/target-supports.exp (check_effective_target_gld): New proc.

From-SVN: r175749

gcc/ChangeLog

+2011-07-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR libmudflap/49549
+	* doc/sourcebuild.texi (Effective-Target Keywords): Document gld.
+
 2011-07-01  Jakub Jelinek  <jakub@redhat.com>
 
 	* tree-pretty-print.c (dump_generic_code) <case CONSTRUCTOR>: Print

gcc/doc/sourcebuild.texi

@@ -1760,6 +1760,9 @@ Target uses GNU @command{as}.
 @item gc_sections
 Target supports @option{--gc-sections}.
 
+@item gld
+Target uses GNU @command{ld}.
+
 @item keeps_null_pointer_checks
 Target keeps null pointer checks, either due to the use of
 @option{-fno-delete-null-pointer-checks} or hardwired into the target.

gcc/testsuite/ChangeLog

+2011-07-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR libmudflap/49549
+	* lib/target-supports.exp (check_effective_target_gld): New proc.
+
 2011-07-01  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/49603

gcc/testsuite/lib/target-supports.exp

@@ -3843,6 +3843,26 @@ proc check_effective_target_gas { } {
     return $use_gas_saved
 }
 
+# Return 1 if GNU ld is used.
+
+proc check_effective_target_gld { } {
+    global use_gld_saved
+    global tool
+
+    if {![info exists use_gld_saved]} {
+	# Check if the ld used by gcc is GNU ld.
+	set gcc_ld [lindex [${tool}_target_compile "-print-prog-name=ld" "" "none" ""] 0]
+	set status [remote_exec host "$gcc_ld" "--version"]
+	set ld_output [lindex $status 1]
+	if { [ string first "GNU" $ld_output ] >= 0 } {
+	    set use_gld_saved 1
+	} else {
+	    set use_gld_saved 0
+	}
+    }
+    return $use_gld_saved
+}
+
 # Return 1 if the compiler has been configure with link-time optimization
 # (LTO) support.
 

libmudflap/ChangeLog

+2011-07-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR libmudflap/49549
+	* testsuite/lib/libmudflap.exp (load_gcc_lib): Load
+	target-supports.exp.
+	* testsuite/libmudflap.cth/cthfrags.exp: Only pass
+	--noinhibit-exec to GNU ld.
+
 2011-06-27  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	PR libmudflap/38738

libmudflap/testsuite/lib/libmudflap.exp

-# Copyright (C) 2001, 2002, 2003, 2004, 2009, 2010
+# Copyright (C) 2001, 2002, 2003, 2004, 2009, 2010, 2011
 # Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
@@ -30,6 +30,7 @@ proc load_gcc_lib { filename } {
 load_lib mfdg.exp
 load_lib libgloss.exp
 load_gcc_lib target-libpath.exp
+load_gcc_lib target-supports.exp
 load_gcc_lib timeout.exp
 load_gcc_lib timeout-dg.exp
 

libmudflap/testsuite/libmudflap.cth/cthfrags.exp

@@ -11,10 +11,15 @@ foreach flags $MUDFLAP_FLAGS {
 	set bsrc [file tail $srcfile]
 	setenv MUDFLAP_OPTIONS "-viol-segv"
 	if {$libmudflapth} then {
-	    # --noinhibit-exec works around a ld problem that causes
-	    # "Dwarf Error: Invalid or unhandled FORM value: 14"
-	    # to fail builds unnecessarily.
-	    dg-runtest $srcfile $flags "-fmudflapth -lmudflapth -lpthread -Wl,--noinhibit-exec"
+	    if [check_effective_target_gld] {
+		# --noinhibit-exec works around a ld problem that causes
+		# "Dwarf Error: Invalid or unhandled FORM value: 14"
+		# to fail builds unnecessarily.
+		set noie_option " -Wl,--noinhibit-exec"
+	    } else {
+		set noie_option ""
+	    }
+	    dg-runtest $srcfile $flags "-fmudflapth -lmudflapth -lpthread $noie_option"
 	} else {
 	    if {$flags != ""} {set f " ($flags)"} {set f ""}
             untested "libmudflap.cth/$bsrc$f"