Buildroot 2019.11 with GCC 9.2 build fails with "xgcc: No such file or directory"

[cirosantilli]

At https://github.com/cirosantilli/linux-kernel-module-cheat/tree/buildroot-2019.11-1 which has buildroot 2019.11 and GCC 9.2:

  cc1-checksum.o libbackend.a main.o libcommon-target.a libcommon.a ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a libcommon.a ../libcpp/libcpp.a   ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a  -L/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/host/lib -lisl -L/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/host/lib -L/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/host/lib -L/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/host/lib -lmpc -lmpfr -lgmp -rdynamic -ldl  -L./../zlib -lz
/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/build/host-gcc-final-custom/build/./gcc/xgcc -B/mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/build/host-gcc-final-custom/build/./gcc/ -xc++ -nostdinc /dev/null -S -o /dev/null -fself-test=../../gcc/testsuite/selftests
/bin/bash: /mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/build/host-gcc-final-custom/build/./gcc/xgcc: No such file or directory
make[4]: *** [../../gcc/cp/Make-lang.in:178: s-selftest-c++] Error 127
make[4]: *** Waiting for unfinished jobs....
../../gcc/gcc.c: In function ‘long unsigned int get_random_number()’:
../../gcc/gcc.c:9639:12: warning: ignoring return value of ‘ssize_t read(int, void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
 9639 |       read (fd, &ret, sizeof (HOST_WIDE_INT));
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc.c: In function ‘void do_report_bug(const char**, int, char**, char**)’:
../../gcc/gcc.c:6999:9: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
 6999 |   write (fd, "\n//", 3);
      |   ~~~~~~^~~~~~~~~~~~~~~
../../gcc/gcc.c:7002:13: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
 7002 |       write (fd, " ", 1);
      |       ~~~~~~^~~~~~~~~~~~
../../gcc/gcc.c:7003:13: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
 7003 |       write (fd, new_argv[i], strlen (new_argv[i]));
      |       ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../gcc/gcc.c:7005:9: warning: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
 7005 |   write (fd, "\n\n", 2);
      |   ~~~~~~^~~~~~~~~~~~~~~
rm gcov.pod gfdl.pod gpl.pod cpp.pod gcc.pod gcov-dump.pod gfortran.pod gcov-tool.pod fsf-funding.pod
make[3]: *** [Makefile:4322: all-gcc] Error 2
make[2]: *** [Makefile:955: all] Error 2
make[1]: *** [package/pkg-generic.mk:241: /mnt/sda3/linux-kernel-module-cheat-out/buildroot/build/default/x86_64/build/host-gcc-final-custom/.stamp_built] Error 2
make: *** [Makefile:84: _all] Error 2
Traceback (most recent call last):
  File "./build", line 656, in <module>
    Main().cli()
  File "/home/ciro/bak/git/linux-kernel-module-cheat/cli_function.py", line 267, in cli
    exit_status = self.cli_noexit(*args, **kwargs)
  File "/home/ciro/bak/git/linux-kernel-module-cheat/cli_function.py", line 258, in cli_noexit
    return self._do_main(vars(args))
  File "/home/ciro/bak/git/linux-kernel-module-cheat/cli_function.py", line 152, in _do_main
    return self.main(**self._get_args(kwargs))
  File "/home/ciro/bak/git/linux-kernel-module-cheat/common.py", line 1372, in main
    ret = self.timed_main()
  File "./build", line 653, in timed_main
    component.build(self.env['arch'])
  File "./build", line 57, in build
    self.build_callback()
  File "./build", line 447, in f
    lkmc.import_path.import_path_main(component_file)(**args)
  File "/home/ciro/bak/git/linux-kernel-module-cheat/common.py", line 685, in __call__
    return super().__call__(**kwargs)
  File "/home/ciro/bak/git/linux-kernel-module-cheat/cli_function.py", line 149, in __call__
    return self._do_main(kwargs)
  File "/home/ciro/bak/git/linux-kernel-module-cheat/cli_function.py", line 152, in _do_main
    return self.main(**self._get_args(kwargs))
  File "/home/ciro/bak/git/linux-kernel-module-cheat/common.py", line 1372, in main
    ret = self.timed_main()
  File "/home/ciro/bak/git/linux-kernel-module-cheat/common.py", line 1795, in timed_main
    return self.build()
  File "/home/ciro/bak/git/linux-kernel-module-cheat/build-buildroot", line 166, in build
    cwd=self.env['buildroot_source_dir'],
  File "/home/ciro/bak/git/linux-kernel-module-cheat/shell_helpers.py", line 432, in run_cmd
    raise e
Exception: Command exited with status: 2

Problem does not happen on clean Buildroot 2019.11 with make qemu_x86_64_defconfig then menuconfig to use GCC 9.2.

Problem also does not happen with above + modify binutils to 2.32... give up?

[ghost]

I'm also having this issue with buildroot 2020.02 (not from your repo). I could fix it by deleting the out/build/ directory and running make again. Had to do this evry time I build, so I used binutils 2.32, I assume some build variables are set wrong at first build, so when I started build again after deleting the dir, some variables other builds set aren't set anymore.

[fidomax]

Just apply this patch to gcc:

--- a/gcc/Makefile.in	2019-09-04 10:05:38.483715500 +0300
+++ b/gcc/Makefile.in	2019-04-25 17:32:16.000000000 +0300
@@ -1961,7 +1961,7 @@
 # require the selftests to be run by defining their selftest-<LANG> as
 # s-selftest-<LANG>.  Otherwise, they should define it as empty.
 
-SELFTEST_TARGETS = @selftest_languages@
+SELFTEST_TARGETS = 
 selftest: $(SELFTEST_TARGETS)
 
 # Recompile all the language-independent object files.

[ghost]

Thank you!