Tidy objdump_symstuff and objdump_dynsymstuff

* testsuite/ld-elfvers/vers.exp (objdump_symstuff): Remove unused
	variable.  Init list_a and list_b to empty.
	(objdump_dynsymstuff): Likewise, and remove undefined list_a
	handling.
	* testsuite/ld-elfweak/elfweak.exp (objdump_symstuff): Similarly.
	(objdump_dynsymstuff): Similarly.

ld/ChangeLog

@@ -1,3 +1,12 @@
+2020-08-03  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/ld-elfvers/vers.exp (objdump_symstuff): Remove unused
+	variable.  Init list_a and list_b to empty.
+	(objdump_dynsymstuff): Likewise, and remove undefined list_a
+	handling.
+	* testsuite/ld-elfweak/elfweak.exp (objdump_symstuff): Similarly.
+	(objdump_dynsymstuff): Similarly.
+
 2020-07-31  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* testsuite/ld-elf/indirect.exp: Append -fno-lto to CC.

ld/testsuite/ld-elfvers/vers.exp

@@ -261,7 +261,8 @@ proc objdump_symstuff { objdump object expectfile } {
 	verbose "# Diff'ing: $expectfile $tmpdir/objdump.out" 2
 
 	set eof -1
-	set differences 0
+	set list_a {}
+	set list_b {}
 
 	while { [gets $file_a line] != $eof } {
 	    if [regexp "^#.*$" $line] then {
@@ -286,7 +287,6 @@ proc objdump_symstuff { objdump object expectfile } {
 	    set line_a [lindex $list_a $i]
 	    set line_b [lindex $list_b $i]
 
-
 	    verbose "\t$expectfile: $i: $line_a" 3
 	    verbose "\t/tmp/objdump.out: $i: $line_b" 3
 	    if [regexp $line_a $line_b] then {
@@ -303,17 +303,12 @@ proc objdump_symstuff { objdump object expectfile } {
 	    verbose -log "Line count"
 	    return 0
 	}
+	return 1
 
-	if $differences<1 then {
-	    return 1
-	}
-
-	return 0
     } else {
 	verbose -log "$exec_output"
 	return 0
     }
-
 }
 
 #
@@ -357,7 +352,8 @@ proc objdump_dynsymstuff { objdump object expectfile } {
 	verbose "# Diff'ing: $expectfile $tmpdir/objdump.out" 2
 
 	set eof -1
-	set differences 0
+	set list_a {}
+	set list_b {}
 
 	while { [gets $file_a line] != $eof } {
 	    if [regexp "^#.*$" $line] then {
@@ -378,15 +374,6 @@ proc objdump_dynsymstuff { objdump object expectfile } {
 	}
 	close $file_b
 
-	# Support empty files.
-	if { ![info exists list_a] } then {
-	    if { ![info exists list_b] } then {
-		return 1
-	    }
-	    verbose -log "\t$tmpdir/objdump.out: $list_b"
-	    return 0
-	}
-
 	for { set i 0 } { $i < [llength $list_b] } { incr i } {
 	    set line_b [lindex $list_b $i]
 
@@ -423,17 +410,12 @@ proc objdump_dynsymstuff { objdump object expectfile } {
 	    verbose -log "Line count"
 	    return 0
 	}
+	return 1
 
-	if $differences<1 then {
-	    return 1
-	}
-
-	return 0
     } else {
 	verbose -log "$exec_output"
 	return 0
     }
-
 }
 
 #

ld/testsuite/ld-elfweak/elfweak.exp

@@ -103,7 +103,8 @@ proc objdump_symstuff { objdump object expectfile } {
 	verbose "# Diff'ing: $expectfile $tmpdir/objdump.out" 2
 
 	set eof -1
-	set differences 0
+	set list_a {}
+	set list_b {}
 
 	while { [gets $file_a line] != $eof } {
 	    if [regexp "^#.*$" $line] then {
@@ -128,7 +129,6 @@ proc objdump_symstuff { objdump object expectfile } {
 	    set line_a [lindex $list_a $i]
 	    set line_b [lindex $list_b $i]
 
-
 	    verbose "\t$expectfile: $i: $line_a" 3
 	    verbose "\t/tmp/objdump.out: $i: $line_b" 3
 	    if [regexp $line_a $line_b] then {
@@ -145,17 +145,12 @@ proc objdump_symstuff { objdump object expectfile } {
 	    verbose -log "Line count"
 	    return 0
 	}
+	return 1
 
-	if $differences<1 then {
-	    return 1
-	}
-
-	return 0
     } else {
 	verbose -log "$exec_output"
 	return 0
     }
-
 }
 
 #
@@ -199,7 +194,8 @@ proc objdump_dynsymstuff { objdump object expectfile } {
 	verbose "# Diff'ing: $expectfile $tmpdir/objdump.out" 2
 
 	set eof -1
-	set differences 0
+	set list_a {}
+	set list_b {}
 
 	while { [gets $file_a line] != $eof } {
 	    if [regexp "^#.*$" $line] then {
@@ -256,17 +252,12 @@ proc objdump_dynsymstuff { objdump object expectfile } {
 	    verbose -log "Line count"
 	    return 0
 	}
+	return 1
 
-	if $differences<1 then {
-	    return 1
-	}
-
-	return 0
     } else {
 	verbose -log "$exec_output"
 	return 0
     }
-
 }
 
 proc build_lib {test libname objs dynsymexp} {