[Bug 54210] New: Some AVX2 calls in ntdll are make impossible to compile Wine with Glibc 2.17

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54210

Bug ID: 54210
           Summary: Some AVX2 calls in ntdll are make impossible to
                    compile Wine with Glibc 2.17
           Product: Wine
           Version: 8.0-rc2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

When I trying to compile an actian Wine 8.0-rc2 version I'd got these error:

dlls/ntdll/unix/signal_x86_64.c: In function ‘signal_init_process’:
dlls/ntdll/unix/signal_x86_64.c:2432:28: error: ‘AT_HWCAP2’ undeclared (first
use in this function)
             if (getauxval( AT_HWCAP2 ) & 2) syscall_flags |=
SYSCALL_HAVE_WRFSGSBASE;
                            ^
dlls/ntdll/unix/signal_x86_64.c:2432:28: note: each undeclared identifier is
reported only once for each function it appears in

Serching for the commit that are broke the build, I'd found that the Wine 6.12
were the last version withount these error.

The commit that broke my build is there (this is after Wine 6.12 and before the
6.13):

https://github.com/wine-mirror/wine/commit/216d2411781f4bf12edf2083a7ac84d28...
(committed on Jul 6, 2021)

The reason of the error is my Glibc 2.17. According of the changelog of the
Glibc 2.18 version (that's available there:
https://lists.gnu.org/archive/html/info-gnu/2013-08/msg00003.html) the call
AT_HWCAP2 was introduced in Glibc 2.18, hovewer I have 2.17.

After that I'd tried to compile Wine 6.12 and I'd got another error caused by
another AVX2 call that was introduced in Glibc 2.24

There is an error:

tools/winegcc/winegcc -o dlls/ntdll/ntdll.so --wine-objdir . -m64 -fPIC
-fasynchronous-unwind-tables -munix -shared \
  dlls/ntdll/ntdll.spec -nodefaultlibs dlls/ntdll/unix/cdrom.o
dlls/ntdll/unix/debug.o \
  dlls/ntdll/unix/env.o dlls/ntdll/unix/esync.o dlls/ntdll/unix/file.o
dlls/ntdll/unix/loader.o \
  dlls/ntdll/unix/loadorder.o dlls/ntdll/unix/process.o
dlls/ntdll/unix/registry.o \
  dlls/ntdll/unix/security.o dlls/ntdll/unix/serial.o dlls/ntdll/unix/server.o
\
  dlls/ntdll/unix/signal_arm.o dlls/ntdll/unix/signal_arm64.o
dlls/ntdll/unix/signal_i386.o \
  dlls/ntdll/unix/signal_x86_64.o dlls/ntdll/unix/socket.o
dlls/ntdll/unix/sync.o \
  dlls/ntdll/unix/system.o dlls/ntdll/unix/tape.o dlls/ntdll/unix/thread.o
dlls/ntdll/unix/virtual.o \
  dlls/ntdll/unix/version.o dlls/winecrt0/libwinecrt0.a
libs/port/libwine_port.a -lrt -lpthread -ldl \
  -Wl,-z,relro
ntdll-sNLwi5.AoHWp5.s: Assembler messages:
ntdll-sNLwi5.AoHWp5.s:115: Error: no such instruction: `xsavec64 0xc0(%rcx)'
winebuild: /usr/bin/gcc-4.9 failed with status 1
winegcc: ./tools/winebuild/winebuild failed
make[1]: *** [dlls/ntdll/ntdll.so] Error 2

When I tried to google this error I'd found that the call xsavec were
introduced in Intel Skylace CPU's. According the webpage
(https://sourceware.org/legacy-ml/libc-stable/2017-10/msg00049.html) these
calls were introduced in Glibc 2.24 hovewer I have Glibc 2.17.

The commit that broke my build is there (this is after Wine 6.2 and before the
6.3):

https://github.com/wine-mirror/wine/commit/30e5250622f40037a58dd87517267dbab...
(committed on Sep 2, 2020)

The both problems present in the 32-bit and 64-bit OS'es.

My build system:

CPU: AMD Phenom II (amdfam10)
OS: Debian 7 (32-bit and 64-bit versions on a two partitions)
Kernel: Linux 4.11
Compiler: GCC 4.9, binutils 2.22, bison 3.2
Other: Glibc 2.17, xserver 1.16