[patch 8/9] Nios II port, ld testsuite fixes

[Sandra Loosemore <sandra at codesourcery dot com>]

This patch fixes some testsuite failures and errors I encountered while 
working on the Nios II port.  A couple notes:

The Nios II ABI only supports the relocations for PIC on Linux targets, 
and the ELF compiler gives an error with -fPIC.  I believe MIPS ELF and 
possibly some other bare-metal targets don't support shared libraries or 
PIC, either.

Besides the two problems with lto.exp that I've fixed in this patch, 
there are still some spurious errors remaining there -- e.g., it assumes 
that the default linker script provides a hosted environment (printf), 
which isn't the case for our Nios II ELF configuration -- but maybe 
someone who better understands what is being tested there can suggest 
better ways to fix those problems.

-Sandra


2013-01-24  Sandra Loosemore  <sandra@codesourcery.com>

	ld/testsuite/
	* ld-elf/indirect.exp: Skip on targets that don't support
	-shared -fPIC.
	* ld-elfcomm/elfcomm.exp: Build with -G0 for nios2.
	* ld-plugin/lto.exp: Skip shared library tests on targets that
	don't support them.  Skip execution tests on non-native targets.

Index: ld/testsuite/ld-elf/indirect.exp
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-elf/indirect.exp,v
retrieving revision 1.2
diff -u -p -r1.2 indirect.exp
--- ld/testsuite/ld-elf/indirect.exp	14 Dec 2012 11:58:59 -0000	1.2
+++ ld/testsuite/ld-elf/indirect.exp	22 Jan 2013 18:36:37 -0000
@@ -37,6 +37,11 @@ if { [which $CC] == 0 } {
     return
 }
 
+# Some bare-metal targets don't support shared libs or PIC.
+if { ![run_host_cmd_yesno $CC "-shared -fPIC $srcdir/$subdir/dummy.c -o tmpdir/t.so"] } {
+    return
+}
+
 proc check_link_message { cmd string testname } {
     send_log "$cmd\n"
     verbose "$cmd"
Index: ld/testsuite/ld-elfcomm/elfcomm.exp
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-elfcomm/elfcomm.exp,v
retrieving revision 1.23
diff -u -p -r1.23 elfcomm.exp
--- ld/testsuite/ld-elfcomm/elfcomm.exp	31 Dec 2010 22:29:19 -0000	1.23
+++ ld/testsuite/ld-elfcomm/elfcomm.exp	22 Jan 2013 18:36:38 -0000
@@ -181,6 +181,10 @@ proc assembler_generates_commons {} {
     return 1
 }
 
+if [istarget nios2*-*-*] {
+    set CFLAGS "$CFLAGS -G0"
+}
+
 # Explicitly use "-fcommon" so that even if $CFLAGS includes
 # "-fno-common", these tests are compiled as expected.
 if {   ![ld_compile "$CC $CFLAGS -fcommon" $srcdir/$subdir/common1a.c tmpdir/common1a.o]
Index: ld/testsuite/ld-plugin/lto.exp
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-plugin/lto.exp,v
retrieving revision 1.2
diff -u -p -r1.2 lto.exp
--- ld/testsuite/ld-plugin/lto.exp	16 Jan 2013 08:14:35 -0000	1.2
+++ ld/testsuite/ld-plugin/lto.exp	23 Jan 2013 19:24:12 -0000
@@ -265,7 +265,9 @@ set lto_run_elf_tests {
 
 run_cc_link_tests $lto_link_tests
 
-if { [is_elf_format] } {
+# Restrict these to ELF targets that support shared libs and PIC.
+if { [is_elf_format]
+     && [run_host_cmd_yesno $CC "-shared -fPIC $srcdir/$subdir/dummy.c -o tmpdir/t.so"] } {
     run_cc_link_tests $lto_link_elf_tests
 }
 
@@ -295,6 +297,11 @@ remote_exec host "mv" "tmpdir/dump tmpdi
 
 run_cc_link_tests $lto_link_symbol_tests
 
+# The following tests require running the executable generated by ld.
+if ![isnative] {
+    return
+}
+
 run_ld_link_exec_tests [] $lto_run_tests
 
 if { [is_elf_format] } {