IBM Z: Fix linking to libatomic in target test cases

One of the test cases failed to link because of missing paths to
libatomic. Reuse procedures in lib/atomic-dg.exp to gather these paths.

gcc/testsuite/ChangeLog:

2021-01-15  Marius Hillenbrand  <mhillen@linux.ibm.com>

	* gcc.target/s390/s390.exp: Call lib atomic-dg.exp to link
	libatomic into testcases in gcc.target/s390/md.
	* gcc.target/s390/md/atomic_exchange-1.c: Remove no unnecessary
	-latomic.

diff --git a/gcc/testsuite/gcc.target/s390/md/atomic_exchange-1.c b/gcc/testsuite/gcc.target/s390/md/atomic_exchange-1.c
index f82b213..54e97d3 100644 (file)
--- a/gcc/testsuite/gcc.target/s390/md/atomic_exchange-1.c
+++ b/gcc/testsuite/gcc.target/s390/md/atomic_exchange-1.c
@@ -1,7 +1,7 @@
 /* Machine description pattern tests.  */
 
 /* { dg-do compile } */
-/* { dg-options "-lpthread -latomic" } */
+/* { dg-options "-lpthread" } */
 /* { dg-do run { target { s390_useable_hw } } } */
 
 /**/

diff --git a/gcc/testsuite/gcc.target/s390/s390.exp b/gcc/testsuite/gcc.target/s390/s390.exp
index 57b2690..df46060 100644 (file)
--- a/gcc/testsuite/gcc.target/s390/s390.exp
+++ b/gcc/testsuite/gcc.target/s390/s390.exp
@@ -28,6 +28,7 @@ if ![istarget s390*-*-*] then {
 load_lib gcc-dg.exp
 load_lib target-supports.exp
 load_lib gfortran-dg.exp
+load_lib atomic-dg.exp
 
 # Return 1 if the the assembler understands .machine and .machinemode.  The
 # target attribute needs that feature to work.
@@ -250,6 +251,8 @@ dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/arch13/*.{c,S}]] \
 dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/vxe/*.{c,S}]] \
        "" "-O3 -march=arch12 -mzarch"
 
+# Some md tests require libatomic
+atomic_init
 dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/md/*.{c,S}]] \
        "" $DEFAULT_CFLAGS
 
@@ -294,4 +297,5 @@ foreach t [list $srcdir/$subdir/pr80080-3.c] {
 }
 
 # All done.
+atomic_finish
 dg-finish