From: Maciej W. Rozycki <macro@wdc.com>
Date: Wed, 20 Nov 2019 15:49:23 +0000 (+0000)
Subject: libgomp/test: Add flags to find libatomic in build-tree testing
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=83115e9eb8a54893088eb556fb4cc9194c0c5926;p=gcc.git

libgomp/test: Add flags to find libatomic in build-tree testing

Add flags to find libatomic in build-tree testing, fixing a catastrophic
libgomp testsuite failure with `riscv*-*-linux*' targets, which imply
`-latomic' with the `-pthread' GCC option, implied in turn by the
`-fopenacc' and `-fopenmp' options, removing failures like:

.../bin/riscv64-linux-gnu-ld: cannot find -latomic
collect2: error: ld returned 1 exit status
compiler exited with status 1
FAIL: libgomp.c/../libgomp.c-c++-common/atomic-18.c (test for excess errors)
Excess errors:
.../bin/riscv64-linux-gnu-ld: cannot find -latomic

UNRESOLVED: libgomp.c/../libgomp.c-c++-common/atomic-18.c compilation failed to produce executable

and bringing overall test results for the `riscv64-linux-gnu' target
(here with the `x86_64-linux-gnu' host and RISC-V QEMU in the Linux user
emulation mode as the target board) from:

		=== libgomp Summary ===

# of expected passes		90
# of unexpected failures	3267
# of expected failures		2
# of unresolved testcases	3247
# of unsupported tests		548

to:

		=== libgomp Summary ===

# of expected passes		6834
# of unexpected failures	4
# of expected failures		4
# of unsupported tests		518

	libgomp/
	* testsuite/lib/libgomp.exp (libgomp_init): Add flags to find
	libatomic in build-tree testing.

From-SVN: r278505
---

diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index e1211c16be6..a7e6870c3ea 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-20  Maciej W. Rozycki  <macro@wdc.com>
+
+	* testsuite/lib/libgomp.exp (libgomp_init): Add flags to find
+	libatomic in build-tree testing.
+
 2019-11-18  Maciej W. Rozycki  <macro@wdc.com>
 
 	* testsuite/Makefile.in: Regenerate.
diff --git a/libgomp/testsuite/lib/libgomp.exp b/libgomp/testsuite/lib/libgomp.exp
index 14d9b5f1305..74d032623c9 100644
--- a/libgomp/testsuite/lib/libgomp.exp
+++ b/libgomp/testsuite/lib/libgomp.exp
@@ -174,6 +174,20 @@ proc libgomp_init { args } {
     # For build-tree testing, also consider the library paths used for builing.
     # For installed testing, we assume all that to be provided in the sysroot.
     if { $blddir != "" } {
+	# The `-fopenacc' and `-fopenmp' options imply `-pthread', and
+	# that implies `-latomic' on some hosts, so wire in libatomic
+	# build directories.
+	if [ishost "riscv*-*-linux*"] {
+	    set shlib_ext [get_shlib_extension]
+	    set atomic_library_path "${blddir}/../libatomic/.libs"
+	    if { [file exists "${atomic_library_path}/libatomic.a"]
+		 || [file exists \
+		     "${atomic_library_path}/libatomic.${shlib_ext}"] } {
+		lappend ALWAYS_CFLAGS \
+		    "additional_flags=-L${atomic_library_path}"
+		append always_ld_library_path ":${atomic_library_path}"
+	    }
+	}
 	global cuda_driver_include
 	global cuda_driver_lib
 	if { $cuda_driver_include != "" } {