[PATCH]Replace -shared with -r -nostdlib in gcc.dg/lto/pr61526 pr54709 pr64415 test cases.

[Renlin Li <renlin dot li at foss dot arm dot com>]

Hi all,

The gcc.dg/lto/pr54709, pr61526, pr64415 linking testcases keep failing on
arm/aarch64 bare-metal target.

It's because statically built newlib library is used to link with shared object.
And the linker complains about relocations which cannot be used in
shared object.

For example, the following errors are produced:

crtbegin.o: relocation R_ARM_MOVW_ABS_NC against `a local symbol' can not be
used when making a shared object; recompile with -fPIC

crtbegin.o: relocation R_ARM_THM_MOVW_ABS_NC against `a local symbol' can not
be used when making a shared object; recompile with -fPIC

librdimon.a(rdimon-syscalls.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against
external symbol `_impure_ptr' can not be used when making a shared object;
recompile with -fPIC

Presumably, bare-metal toolchain for other architecture have those test case
failures as well?

In this patch, -shared option is replace by -r -nostdlib. So that the standard
system startup files or libraries are not used when linking.


arm-none-eabi, aarch64-none-elf regression test OK, OK for trunk?

Regards,
Renlin Li

gcc/testsuite/ChangeLog:

2016-02-29  Renlin Li<renlin.li@arm.com>

	* gcc.dg/lto/pr54709_0.c: Replace -shard with -r -nostdlib.
	* gcc.dg/lto/pr61526_0.c: Ditto.
	* gcc.dg/lto/pr64415_0.c: Ditto.

diff --git a/gcc/testsuite/gcc.dg/lto/pr54709_0.c b/gcc/testsuite/gcc.dg/lto/pr54709_0.c
index f3db5dc..12a10e0 100644
--- a/gcc/testsuite/gcc.dg/lto/pr54709_0.c
+++ b/gcc/testsuite/gcc.dg/lto/pr54709_0.c
@@ -1,7 +1,7 @@
 /* { dg-lto-do link } */
 /* { dg-require-visibility "hidden" } */
 /* { dg-require-effective-target fpic } */
-/* { dg-extra-ld-options { -shared } } */
+/* { dg-extra-ld-options { -r -nostdlib } } */
 /* { dg-lto-options { { -fPIC -fvisibility=hidden -flto } } } */
 
 void foo (void *p, void *q, unsigned s)
diff --git a/gcc/testsuite/gcc.dg/lto/pr61526_0.c b/gcc/testsuite/gcc.dg/lto/pr61526_0.c
index 8a631f0..5e2f7acf 100644
--- a/gcc/testsuite/gcc.dg/lto/pr61526_0.c
+++ b/gcc/testsuite/gcc.dg/lto/pr61526_0.c
@@ -1,7 +1,7 @@
 /* { dg-require-effective-target fpic } */
 /* { dg-lto-do link } */
 /* { dg-lto-options { { -fPIC -flto -flto-partition=1to1 } } } */
-/* { dg-extra-ld-options { -shared } } */
+/* { dg-extra-ld-options { -r -nostdlib } } */
 
 static void *master;
 void *foo () { return master; }
diff --git a/gcc/testsuite/gcc.dg/lto/pr64415_0.c b/gcc/testsuite/gcc.dg/lto/pr64415_0.c
index 4faab2b..0f583a5 100644
--- a/gcc/testsuite/gcc.dg/lto/pr64415_0.c
+++ b/gcc/testsuite/gcc.dg/lto/pr64415_0.c
@@ -1,7 +1,7 @@
 /* { dg-lto-do link } */
 /* { dg-require-effective-target fpic } */
 /* { dg-lto-options { { -O -flto -fpic } } } */
-/* { dg-extra-ld-options { -shared } } */
+/* { dg-extra-ld-options { -r -nostdlib } } */
 /* { dg-extra-ld-options "-Wl,-undefined,dynamic_lookup" { target *-*-darwin* } } */
 
 extern void bar(char *, int);