Add flags to find libatomic in build-tree testing, fixing a catastrophic
libgomp testsuite failure with targets such as `riscv-linux-gnu' that
imply `-latomic' with the `-pthread' GCC option, implied in turn by the
offload 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 said 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.
---
libgomp/testsuite/lib/libgomp.exp | 10 ++++++++++
1 file changed, 10 insertions(+)
gcc-test-libgomp-atomic-lib-path.diff
Index: gcc/libgomp/testsuite/lib/libgomp.exp
===================================================================
--- gcc.orig/libgomp/testsuite/lib/libgomp.exp
+++ gcc/libgomp/testsuite/lib/libgomp.exp
@@ -174,6 +174,16 @@ 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 { $blddir != "" } {
+ # Offload options imply `-pthread', and that implies `-latomic'
+ # on some targets, so wire in libatomic build directories.
+ set shlib_ext [get_shlib_extension]
+ set atomic_library_path "${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 != "" } {
