Function "gimplify_target_expr" not defined.
Breakpoint 1 (gimplify_target_expr if expr_p=0x7fffeb6e49f8) pending.
Starting program: /usr/bin/x86_64-pc-linux-gnu-g++ -fvisibility-inlines-hidden -O3 -pipe -march=znver1 -std=c++14 -fPIC -m64 -pthread -finline-functions -Wno-inline -Wall -fvisibility=hidden -DBOOST_ALL_DYN_LINK=1 -DBOOST_ALL_NO_LIB=1 -DNDEBUG -I. -c -o bin.v2/libs/wave/build/gcc-11.1/gentoorelease/pch-off/threading-multi/visibility-hidden/instantiate_predef_macros.o libs/wave/src/instantiate_predef_macros.cpp
[Attaching after process 2915460 vfork to child process 2915464]
[New inferior 2 (process 2915464)]
[Detaching vfork parent process 2915460 after child exec]
[Inferior 1 (process 2915460) detached]
process 2915464 is executing new program: /usr/libexec/gcc/x86_64-pc-linux-gnu/11.1.0/cc1plus
[Switching to process 2915464]

Thread 2.1 "cc1plus" hit Breakpoint 1, gimplify_target_expr (expr_p=0x7fffeb6e49f8, pre_p=0x7fffffffc5b8, post_p=0x7fffffffc2c8) at /var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/gimplify.c:6757
6757	{
Continuing.

Thread 2.1 "cc1plus" hit Breakpoint 1, gimplify_target_expr (expr_p=0x7fffeb6e49f8, pre_p=0x7fffffffc5b8, post_p=0x7fffffffbd08) at /var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/gimplify.c:6757
6757	{
6759	  tree temp = TARGET_EXPR_SLOT (targ);
6760	  tree init = TARGET_EXPR_INITIAL (targ);
6766	  if (init)
6772	      if (!poly_int_tree_p (DECL_SIZE (temp)))
5223	  return (TREE_CODE (t) == INTEGER_CST || POLY_INT_CST_P (t));
6782		  unpoison_it = gsi_last (*pre_p);
151	  return i;
6785		  gimple_add_tmp_var (temp);
gimple_add_tmp_var (tmp=0x7fffeb6c43f0) at /var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/gimplify.c:765
765	  gcc_assert (!DECL_CHAIN (tmp) && !DECL_SEEN_IN_BIND_EXPR_P (tmp));
fancy_abort (file=file@entry=0x18e0630 "/var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/gimplify.c", line=line@entry=765, function=function@entry=0x18e0321 "gimple_add_tmp_var")
    at /var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/diagnostic.c:1874
1874	{
Run till exit from #0  fancy_abort (file=file@entry=0x18e0630 "/var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/gimplify.c", line=line@entry=765, function=function@entry=0x18e0321 "gimple_add_tmp_var")
    at /var/tmp/portage/sys-devel/gcc-11.1.0/work/gcc-11.1.0/gcc/diagnostic.c:1874
[Inferior 2 (process 2915464) exited with code 04]