[Bug libstdc++/69331] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69331

--- Comment #20 from John David Anglin <danglin at gcc dot gnu.org> ---
// { dg-additional-options "-latomic" { target libatomic_available } }

doesn't work:

spawn /test/gnu/gcc/objdir/./gcc/xg++ -shared-libgcc
-B/test/gnu/gcc/objdir/./gc
c -nostdinc++ -L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/src
-L/t
est/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/src/.libs
-L/test/gnu/gcc/
objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/libsupc++/.libs
-B/opt/gnu/gcc/gcc-8/h
ppa2.0w-hp-hpux11.11/bin/ -B/opt/gnu/gcc/gcc-8/hppa2.0w-hp-hpux11.11/lib/
-isyst
em /opt/gnu/gcc/gcc-8/hppa2.0w-hp-hpux11.11/include -isystem
/opt/gnu/gcc/gcc-8/
hppa2.0w-hp-hpux11.11/sys-include
-B/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/.
/libstdc++-v3/src/.libs -fmessage-length=0 -fno-show-column -g -O2
-DLOCALEDIR="
." -nostdinc++
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include
/hppa2.0w-hp-hpux11.11
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3
/include -I/test/gnu/gcc/gcc/libstdc++-v3/libsupc++
-I/test/gnu/gcc/gcc/libstdc+
+-v3/include/backward -I/test/gnu/gcc/gcc/libstdc++-v3/testsuite/util
libatomic_
available10911.c -latomic -fno-diagnostics-show-caret -fdiagnostics-color=never
./libtestc++.a
-L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/src/fil
esystem/.libs -lm -o libatomic_available10911.exe
/usr/ccs/bin/ld: Can't find library: "atomic"
collect2: error: ld returned 1 exit status

In this build, we the following library path:
/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libatomic/.libs