[Bug fortran/94129] Using almost any openacc !$acc directive causes ICE "compressed stream: data error"

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94129

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Matthias Klose from comment #3)
> $ gfortran-10 -v -fopenacc program.f90 2>&1 |grep zstd
> Supported LTO compression algorithms: zlib zstd
> Supported LTO compression algorithms: zlib zstd
> 
> afaics both builds are correctly configured.

Then you can dump lto header in a .o file:

$ gcc -flto -c bss.c
$ readelf -SW bss.o  | grep lto_.lto
  [ 6] .gnu.lto_.lto.2cfeb5fb4c8095f PROGBITS        0000000000000000 000062
000008 00   E  0   0  1

$ objdump -s -j .gnu.lto_.lto.2cfeb5fb4c8095f bss.o

bss.o:     file format elf64-x86-64

Contents of section .gnu.lto_.lto.2cfeb5fb4c8095f:
 0000 09000000 01000100                    ........        

that ending 0100 is zstd == 1.