Rid libdummy.a from lto.exp

libdummy.a is used to make run_cc_link_tests compile objects and
archive them.  libdummy.a isn't used.  What we're really doing is
preventing a final link.  So do that directly.

	* lib/ld-lib.exp (run_ld_link_tests): Stop after assembling objects
	if binfile is empty.
	(run_ld_link_exec_tests, run_cc_link_tests): Likewise.  Tidy
	status checks.
	* ld-plugin/lto.exp: Don't use libdummy.a trick to compile objects.
	Instead use an empty output file.

ld/testsuite/ChangeLog

@@ -1,3 +1,12 @@
+2014-07-05  Alan Modra  <amodra@gmail.com>
+
+	* lib/ld-lib.exp (run_ld_link_tests): Stop after assembling objects
+	if binfile is empty.
+	(run_ld_link_exec_tests, run_cc_link_tests): Likewise.  Tidy
+	status checks.
+	* ld-plugin/lto.exp: Don't use libdummy.a trick to compile objects.
+	Instead use an empty output file.
+
 2014-07-03  Alan Modra  <amodra@gmail.com>
 
 	* ld-elf/pr17068.s: New.

ld/testsuite/ld-plugin/lto.exp

@@ -43,81 +43,81 @@ set lto_link_tests {
   {"LTO 1"
    "-O2 -flto -fuse-linker-plugin" "-flto -fuse-linker-plugin"
    {lto-1a.c lto-1b.c} {} "lto-1.exe"}
-  {"Build libdummy.a 2"
+  {"Compile 2"
    "" "-O2 -flto -fuse-linker-plugin"
-   {lto-2.c} {} "libdummy.a"}
+   {lto-2.c} {} ""}
   {"LTO 2"
    "-static -O2 -flto -fuse-linker-plugin tmpdir/lto-2.o -lm" ""
    {dummy.c} {} "lto-2.exe"}
-  {"Build libdummy.a 3a"
+  {"Compile 3a"
    "" "-flto"
-   {lto-3a.c} {} "libdummy.a"}
+   {lto-3a.c} {} ""}
-  {"Build libdummy.a 3c"
+  {"Compile 3c"
    "" "-O2"
-   {lto-3c.c} {} "libdummy.a"}
+   {lto-3c.c} {} ""}
   {"Build liblto-3.a"
    "" "-flto -ffat-lto-objects"
    {lto-3b.c} {} "liblto-3.a"}
-  {"Build libdummy.a 5a"
+  {"Compile 5a"
    "" "-flto"
-   {lto-5a.c} {} "libdummy.a"}
+   {lto-5a.c} {} ""}
-  {"Build libdummy.a 5b"
+  {"Compile 5b"
    "" "-flto"
-   {lto-5b.c} {} "libdummy.a"}
+   {lto-5b.c} {} ""}
   {"LTO 6"
    "-O2 -flto -fuse-linker-plugin" ""
    {lto-6.c} {} "lto-6.exe" "c"}
-  {"Build libdummy.a 9"
+  {"Compile 9"
    "" "-O2 -finline -flto"
-   {lto-9.cc} {} "libdummy.a" "c++"}
+   {lto-9.cc} {} "" "c++"}
-  {"Build libdummy.a 11a"
+  {"Compile 11a"
    "" "-O -flto"
-   {lto-11a.c} {} "libdummy.a"}
+   {lto-11a.c} {} ""}
-  {"Build libdummy.a 11b"
+  {"Compile 11b"
    "" "-O -flto"
-   {lto-11b.c} {} "libdummy.a"}
+   {lto-11b.c} {} ""}
-  {"Build libdummy.a 11c"
+  {"Compile 11c"
    "" "-O"
-   {lto-11c.c} {} "libdummy.a"}
+   {lto-11c.c} {} ""}
   {"Build liblto-12.a"
    "" "-O2 -flto"
    {lto-12c.c} {} "liblto-12.a"}
-  {"Build libdummy.a 12"
+  {"Compile 12"
    "" "-O2 -flto"
-   {lto-12a.c lto-12b.c} {} "libdummy.a"}
+   {lto-12a.c lto-12b.c} {} ""}
-  {"Build libdummy.a 13"
+  {"Compile 13"
    "" "-O2 -flto"
-   {lto-13a.c lto-13b.c} {} "libdummy.a"}
+   {lto-13a.c lto-13b.c} {} ""}
   {"Build liblto-13.a"
    "" "-O2"
    {lto-13c.c} {} "liblto-13.a"}
-  {"Build libdummy.a 14a"
+  {"Compile 14a"
    "" "-flto"
-   {lto-14a.c lto-14b.c} {} "libdummy.a"}
+   {lto-14a.c lto-14b.c} {} ""}
   {"Build liblto-14.a"
    "" "-flto"
    {lto-14c.c} {} "liblto-14.a"}
-  {"Build libdummy.a 15a"
+  {"Compile 15a"
    "" "-flto"
-   {lto-15a.c} {} "libdummy.a"}
+   {lto-15a.c} {} ""}
   {"Build liblto-15.a"
    "" "-flto"
    {lto-15b.c} {} "liblto-15.a"}
   {"PR ld/12696"
    "-O2 -flto -fuse-linker-plugin -r -nostdlib" "-O2 -flto"
    {pr12696-1.cc} {} "pr12696-1r.o" "c++"}
-  {"Build libdummy.a PR ld/12758"
+  {"Compile PR ld/12758"
    "" ""
-   {pr12758a.s} {} "libdummy.a"}
+   {pr12758a.s} {} ""}
   {"Build libpr12758.a"
    "" "-flto -O2 -ffat-lto-objects"
    {pr12758b.c} {} "libpr12758.a"}
   {"PR ld/12758"
    "-O2 -Wl,-e,foo -nostdlib -flto -fuse-linker-plugin tmpdir/pr12758a.o -Wl,--start-group tmpdir/libpr12758.a -Wl,--end-group" ""
    {dummy.c} {} "pr12758.exe"}
-  {"Build libdummy.a PR ld/12760"
+  {"Compile PR ld/12760"
    "" "-g -O0"
-   {pr12760a.c} {} "libdummy.a"}
+   {pr12760a.c} {} ""}
   {"Build libpr12760.a"
    "" "-flto -O2 -ffat-lto-objects"
    {pr12760b.c} {} "libpr12760.a"}
@@ -127,24 +127,24 @@ set lto_link_tests {
   {"Build libpr13183.a"
    "-T" "-flto -O2 -ffat-lto-objects"
    {pr13183a.c} {} "libpr13183.a"}
-  {"Build libdummy.a PR ld/13183"
+  {"Compile PR ld/13183"
    "" "-flto -O2"
-   {pr13183b.c} {} "libdummy.a"}
+   {pr13183b.c} {} ""}
-  {"Build libdummy.a PR ld/13201"
+  {"Compile PR ld/13201"
    "" "-flto -O2"
-   {pr13201.c} {} "libdummy.a"}
+   {pr13201.c} {} ""}
   {"PR ld/13287"
    "-flto -fuse-linker-plugin -Wl,--as-needed" "-flto"
    {pr13287.cc} {} "pr13287.exe" "c++"}
   {"PR ld/15323"
    "" "-O2"
-   {pr15323a.c} {} "libdummy.a" "c"}
+   {pr15323a.c} {} "" "c"}
-  {"Build libdummy.a(1) PR ld/pr16846"
+  {"Compile(1) PR ld/pr16846"
    "" "-flto"
-   {pr16846a.c pr16846b.c} {} "libdummy.a"}
+   {pr16846a.c pr16846b.c} {} ""}
-  {"Build libdummy.a(2) PR ld/pr16846"
+  {"Compile(2) PR ld/pr16846"
    "" ""
-   {pr16846c.c} {} "libdummy.a"}
+   {pr16846c.c} {} ""}
   {"PR ld/pr16846(1)"
    "-flto -fuse-linker-plugin tmpdir/pr16846a.o tmpdir/pr16846b.o tmpdir/pr16846c.o" ""
    {dummy.c} {} "pr16846a.exe"}
@@ -155,29 +155,29 @@ set lto_link_tests {
 
 if { [at_least_gcc_version 4 7] } {
     set lto_link_tests [concat $lto_link_tests {
-      {"Build libdummy.a PR ld/12942 (1)"
+      {"Compile PR ld/12942 (1)"
        "" "-flto -O2"
-       {pr12942a.cc pr12942c.cc} {} "libdummy.a" "c++"}
+       {pr12942a.cc pr12942c.cc} {} "" "c++"}
-      {"Build libdummy.a PR ld/12942 (2)"
+      {"Compile PR ld/12942 (2)"
        "" "-O0"
-       {pr12942b.cc} {} "libdummy.a" "c++"}
+       {pr12942b.cc} {} "" "c++"}
     }]
 }
 
 # Generate input files for complex LTO tests for ELF.
 set lto_link_elf_tests {
-  {"Build libdummy.a 7"
+  {"Compile 7"
    "" "-flto -O2"
-   {lto-7a.c lto-7b.c lto-7c.c} {} "libdummy.a"}
+   {lto-7a.c lto-7b.c lto-7c.c} {} ""}
   {"Build liblto-7.so"
    "-shared" "-O2 -fpic"
    {lto-7d.c} {} "liblto-7.so" "c"}
-  {"Build libdummy.a 8a"
+  {"Compile 8a"
    "" "-O2"
-   {lto-8a.c} {} "libdummy.a"}
+   {lto-8a.c} {} ""}
-  {"Build libdummy.a 8b"
+  {"Compile 8b"
    "" "-flto -O2"
-   {lto-8b.c} {} "libdummy.a"}
+   {lto-8b.c} {} ""}
   {"Build liblto-17a.so"
    "-shared -O2 -fpic -flto -fuse-linker-plugin" "-O2 -fpic -flto"
    {lto-17a.c} {{"nm" {} "lto-17a.d"}} "liblto-17a.so" "c"}

ld/testsuite/lib/ld-lib.exp

@@ -1131,7 +1131,9 @@ proc run_ld_link_tests { ldtests } {
 	    continue
 	}
 
-	if { [regexp ".*\\.a$" $binfile] } {
+	if { $binfile eq "tmpdir/" } {
+	    # compile only
+	} elseif { [regexp ".*\\.a$" $binfile] } {
 	    if { ![ar_simple_create $ar $ld_options $binfile "$objfiles $ld_after"] } {
 		set failed 1
 	    }
@@ -1334,10 +1336,12 @@ proc run_ld_link_exec_tests { targets_to_xfail ldtests } {
 	    set link_cmd $ld
 	}
 
-	if ![$link_proc $link_cmd $binfile "-L$srcdir/$subdir $ld_options $objfiles"] {
+	if { $binfile eq "tmpdir/" } {
+	    # compile only
+	    pass $testname
+	    continue;
+	} elseif ![$link_proc $link_cmd $binfile "-L$srcdir/$subdir $ld_options $objfiles"] {
 	    set failed 1
-	} else {
-	    set failed 0
 	}
 
 	# Check if exec_output is expected.
@@ -1450,18 +1454,16 @@ proc run_cc_link_tests { ldtests } {
 	    set cc_cmd $CC
 	}
 
-	if { [regexp ".*\\.a$" $binfile] } {
+	if { $binfile eq "tmpdir/" } {
+	    # compile only
+	} elseif { [regexp ".*\\.a$" $binfile] } {
 	    if { ![ar_simple_create $ar $ldflags $binfile "$objfiles"] } {
 		fail $testname
 		set failed 1
-	    } else {
-		set failed 0
 	    }
 	} else {
 	    if { ![ld_simple_link $cc_cmd $binfile "-L$srcdir/$subdir $ldflags $objfiles"] } {
 		set failed 1
-	    } else {
-		set failed 0
 	    }
 
 	    # Check if exec_output is expected.
@@ -1535,16 +1537,13 @@ proc run_cc_link_tests { ldtests } {
 		    }
 		}
 	    }
-
-	    if { $failed != 0 } {
-		fail $testname
-	    } else { if { $is_unresolved == 0 } {
-		pass $testname
-	    } }
 	}
 
-	# Catch action errors.
+	if { $failed != 0 } {
-	if { $is_unresolved != 0 } {
+	    fail $testname
+	} elseif { $is_unresolved == 0 } {
+	    pass $testname
+	} else {
 	    unresolved $testname
 	    continue
 	}