https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110812
Bug ID: 110812
Summary: Missing TARGET_OPTION_SAVE/RESTORE on riscv
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sch...@linux-m68k.org
CC: jeffreyalaw at gmail dot com, kito.cheng at gmail dot com,
palmer at dabbelt dot com
Target Milestone: ---
Target: riscv*-*-*
The highway package fails to build with LTO:
[ 5%] Linking CXX shared library libhwy.so
/usr/bin/cmake -E cmake_link_script CMakeFiles/hwy.dir/link.txt --verbose=1
/usr/bin/c++ -fPIC -O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3
-fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables
-fstack-clash-protection -Werror=return-type -flto=auto -g
-DHWY_COMPILE_ALL_ATTAINABLE -O2 -g -DNDEBUG
-Wl,--version-script=/home/abuild/rpmbuild/BUILD/highway-1.0.5/hwy/hwy.version
-flto=auto -Wl,--as-needed -Wl,-z,now -shared -Wl,-soname,libhwy.so.1 -o
libhwy.so.1.0.5 CMakeFiles/hwy.dir/hwy/aligned_allocator.cc.o
CMakeFiles/hwy.dir/hwy/nanobenchmark.cc.o
CMakeFiles/hwy.dir/hwy/per_target.cc.o CMakeFiles/hwy.dir/hwy/print.cc.o
CMakeFiles/hwy.dir/hwy/targets.cc.o CMakeFiles/hwy.dir/hwy/timer.cc.o
lto1: fatal error: target specific builtin not available
compilation terminated.
lto-wrapper: fatal error: /usr/bin/c++ returned 1 exit status
compilation terminated.
/usr/lib64/gcc/riscv64-suse-linux/13/../../../../riscv64-suse-linux/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/hwy.dir/build.make:181: libhwy.so.1.0.5] Error 1
Workaround is to add -march=rv64gcv1p0, but the correct fix is to implement
TARGET_OPTION_SAVE/RESTORE.
