RE: [gentoo-user] 5.4 kernels won't compile

[Pengcheng Xu]

A quick Google with keyword "R_X86_64_PC64 uclibc" shows that uclibc is missing some ELF definitions that are needed for newer kernels:

https://gogs.waldemar-brodkorb.de/oss/uclibc-ng/issues/2

You may try the proposed solution there (to insert the definition into /usr/include/elf.h), but IMHO this should be handled by uclibc-ng themselves or a patch in Gentoo.  As it seems like you've packaged uclibc-ng yourself (sys-libs/uclibc-ng:       1.0.33::akater) maybe you would want to add a patch there instead.

Regards,
-- 
Pengcheng Xu
https://jsteward.moe

> -----Original Message-----
> From: akater <nuclearspace@×××××.com>
> Sent: Friday, May 8, 2020 7:43 PM
> To: gentoo-user@l.g.o
> Subject: [gentoo-user] 5.4 kernels won't compile
>
> Neither linux-5.4.28-gentoo nor linux-5.4.38-gentoo would compile, with the
> following error:
>
> > CFLAGS="-Wno-error=undef" make && make modules_install
> >   HOSTCC  scripts/basic/fixdep
> >   HOSTCC  arch/x86/tools/relocs_32.o
> >   HOSTCC  arch/x86/tools/relocs_64.o
> > In file included from arch/x86/tools/relocs_64.c:18:
> > arch/x86/tools/relocs.c: In function 'rel_type':
> > arch/x86/tools/relocs.c:201:12: error: 'R_X86_64_PC64' undeclared (first use
> in this function); did you mean 'R_X86_64_64'?
> >   201 |   REL_TYPE(R_X86_64_PC64),
> >       |            ^~~~~~~~~~~~~
> > arch/x86/tools/relocs.c:197:22: note: in definition of macro 'REL_TYPE'
> >   197 | #define REL_TYPE(X) [X] = #X
> >       |                      ^
> > arch/x86/tools/relocs.c:201:12: note: each undeclared identifier is reported
> only once for each function it appears in
> >   201 |   REL_TYPE(R_X86_64_PC64),
> >       |            ^~~~~~~~~~~~~
> > arch/x86/tools/relocs.c:197:22: note: in definition of macro 'REL_TYPE'
> >   197 | #define REL_TYPE(X) [X] = #X
> >       |                      ^
> > arch/x86/tools/relocs.c:201:12: error: array index in initializer not of
> integer type
> >   201 |   REL_TYPE(R_X86_64_PC64),
> >       |            ^~~~~~~~~~~~~
> > arch/x86/tools/relocs.c:197:22: note: in definition of macro 'REL_TYPE'
> >   197 | #define REL_TYPE(X) [X] = #X
> >       |                      ^
> > arch/x86/tools/relocs.c:201:12: note: (near initialization for 'type_name')
> >   201 |   REL_TYPE(R_X86_64_PC64),
> >       |            ^~~~~~~~~~~~~
> > arch/x86/tools/relocs.c:197:22: note: in definition of macro 'REL_TYPE'
> >   197 | #define REL_TYPE(X) [X] = #X
> >       |                      ^
> > arch/x86/tools/relocs.c: In function 'do_reloc64':
> > arch/x86/tools/relocs.c:802:7: error: 'R_X86_64_PC64' undeclared (first use
> in this function); did you mean 'R_X86_64_64'?
> >   802 |  case R_X86_64_PC64:
> >       |       ^~~~~~~~~~~~~
> >       |       R_X86_64_64
> > make[1]: *** [scripts/Makefile.host:124: arch/x86/tools/relocs_64.o]
> > Error 1
> > make: *** [arch/x86/Makefile:232: archscripts] Error 2
>
> I did not find anything relevant on Gentoo forums or on this mailing list.
> Configuration is a little non-standard.  The first lines of emerge --info:
>
> > Portage 2.3.99 (python 3.7.7-final-0,
> > default/linux/amd64/17.0/uclibc/hardened, gcc-9.3.0, uclibc-ng-1.0.33,
> > 4.19.97-gentoo-poseidon x86_64)
> > =================================================================
> > System uname:
> Linux-4.19.97-gentoo-poseidon-x86_64-Intel-R-_Core-TM-2_Duo_CPU_L9400_@_1.
> 86GHz-with-gentoo-2.6
> > KiB Mem:     1929164 total,    152428 free
> > KiB Swap:          0 total,         0 free
> > Timestamp of repository gentoo: Fri, 08 May 2020 05:00:01 +0000 Head
> > commit of repository gentoo: 92957d0a4e66217194d92beb864ef7b9f2c04cbb
> > sh bash 5.0_p17
> > ld GNU ld (Gentoo 2.33.1 p2) 2.33.1
> > ccache version 3.7.7 [enabled]
> > app-shells/bash:          5.0_p17::gentoo
> > dev-lang/perl:            5.30.1::gentoo
> > dev-lang/python:          2.7.18::gentoo, 3.7.7-r2::gentoo, 3.8.2-r2::gentoo
> > dev-util/ccache:          3.7.7-r1::gentoo
> > dev-util/cmake:           3.16.5::akater
> > sys-apps/baselayout:      2.6-r1::gentoo
> > sys-apps/openrc:          0.42.1::gentoo
> > sys-apps/sandbox:         2.13::gentoo
> > sys-devel/autoconf:       2.69-r4::gentoo
> > sys-devel/automake:       1.16.1-r1::gentoo
> > sys-devel/binutils:       2.33.1-r1::gentoo
> > sys-devel/gcc:            9.3.0::gentoo
> > sys-devel/gcc-config:     2.2.1::gentoo
> > sys-devel/libtool:        2.4.6-r6::gentoo
> > sys-devel/make:           4.2.1-r4::gentoo
> > sys-kernel/linux-headers: 5.4::gentoo (virtual/os-headers)
> > sys-libs/uclibc-ng:       1.0.33::akater
>
> Please help.