[Bug tree-optimization/103226] [12 Regression] Recent change to copy-headers causes execution failure for gcc.dg/torture/pr80974

["aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103226

--- Comment #4 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
It's been a LONG time since I had to do a sim build, so please bear with me.

I have combined tree with  gcc, binutils-gdb, dejagnu, newlib-cygwin:

~/src/combined/configure --target=bfin-elf --enable-languages=c,c++
--with-newlib --prefix=`pwd`/install

C++ won't build:
In file included from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/bits/locale_facets.h:41,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/bits/basic_ios.h:37,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/ios:44,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/istream:38,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/sstream:38,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/complex:45,
                 from
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/ccomplex:39,
                 from
/home/aldyh/src/combined/libstdc++-v3/include/precompiled/stdc++.h:54:
/home/aldyh/bld/bfin-elf/bfin-elf/libstdc++-v3/include/bfin-elf/bits/ctype_base.h:44:35:
error: ‘_U’ was not declared in this scope
   44 |     static const mask upper     = _U;
      |                                   ^~
...
...

So I tried --enable-languages=c which builds, but in-tree testing doesn't work:

(DEJAGNU is set to the provided baseboard file.)

make check-gcc RUNTESTFLAGS="--target_board=basic-sim dg.exp=pr80974.c"

bf532-none/mid-shared-library/mleaf-id-shared-library;@mcpu=bf532-none@mid-shared-library@mleaf-id-shared-library
Executing on host: /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/  -fdiagnostics-plain-output  -flto -c -o
lto3625067.o lto3625067.c    (timeout = 300)
spawn -ignore SIGHUP /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/ -fdiagnostics-plain-output -flto -c -o
lto3625067.o lto3625067.c
Executing on host: /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/ linker_plugin3625067.c 
-fdiagnostics-plain-output  -flto -fuse-linker-plugin  -lm  -o
linker_plugin3625067.exe    (timeout = 300)
spawn -ignore SIGHUP /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/ linker_plugin3625067.c
-fdiagnostics-plain-output -flto -fuse-linker-plugin -lm -o
linker_plugin3625067.exe
xgcc: error: no processor type specified for linking
xgcc: fatal error: error in arguments to spec function 'pass-through-libs'
compilation terminated.
compiler exited with status 1
Executing on host: /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/ offload_gcn3625067.c 
-fdiagnostics-plain-output  -foffload=amdgcn-amdhsa -S -o offload_gcn3625067.s 
  (timeout = 300)
spawn -ignore SIGHUP /opt/notnfs/aldyh/bld/bfin-elf/gcc/xgcc
-B/opt/notnfs/aldyh/bld/bfin-elf/gcc/ offload_gcn3625067.c
-fdiagnostics-plain-output -foffload=amdgcn-amdhsa -S -o offload_gcn3625067.s
xgcc: error: GCC is not configured to support 'amdgcn-amdhsa' as offload target
xgcc: note: no offloading targets configured
compiler exited with status 1

I also tried --target_board=[bfin,bfin-elf,sim,bfin-sim], but those give:

ERROR: couldn't load description file for bfin-sim

With an installed toolchain, I get a similar linking problem:

$ ./bfin-elf-gcc hello.c -w
bfin-elf-gcc: error: no processor type specified for linking
bfin-elf-gcc: fatal error: error in arguments to spec function
‘pass-through-libs’
compilation terminated.

I tried a few random cpu's from config/bfin/elf.h:

 ./bfin-elf-gcc -mcpu=bf549 hello.c -w
/opt/notnfs/aldyh/bld/bfin-elf/install/bin/../lib/gcc/bfin-elf/12.0.0/../../../../bfin-elf/bin/ld:
/opt/notnfs/aldyh/bld/bfin-elf/install/bin/../lib/gcc/bfin-elf/12.0.0/../../../../bfin-elf/
lib/libc.a(lib_a-closer.o): in function `close_r':
/home/aldyh/src/combined/newlib/libc/reent/closer.c:47: warning: _close is not
implemented and will always fail
/opt/notnfs/aldyh/bld/bfin-elf/install/bin/../lib/gcc/bfin-elf/12.0.0/../../../../bfin-elf/bin/ld:
/opt/notnfs/aldyh/bld/bfin-elf/install/bin/../lib/gcc/bfin-elf/12.0.0/../../../../bfin-elf/
lib/libc.a(lib_a-fstatr.o): in function `fstat_r':
etc
etc.

Hmmm, maybe I should just look at the *.optimized dump and see what's up ;-).