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Subject: bug#37876: Regression in MAKE-GCC-TOOLCHAIN after core-updates merge
Resent-From: Carl Dong <contact@HIDDEN>
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Date: Tue, 22 Oct 2019 19:36:15 +0000
From: Carl Dong <contact@HIDDEN>
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Hi all,

I believe there's been a recent regression w/re MAKE-GCC-TOOLCHAIN. I'm una=
ble
to guix build the following minimal reproducer:

--8<---------------cut here---------------start------------->8---
(use-modules (gnu packages commencement)
             (gnu packages gcc)
             (gnu packages base))

(make-gcc-toolchain gcc glibc-2.27)
--8<---------------cut here---------------end--------------->8---

My guix describe output:
Generation 33   Oct 22 2019 15:07:03    (current)
  guix f5d6c88
    repository URL: https://git.savannah.gnu.org/git/guix.git
    commit: f5d6c88d0f5e1556295c1a19c46ddfcb7a23107f

The build failure logs can be found here:
https://www.dropbox.com/s/y7sg3m786ziiwvb/gcc-glibc-2.27-7.4.0.drv.log?dl=
=3D0

Cheers,
Carl Dong
contact@HIDDEN
"I fight for the users"

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Subject: bug#37876: Acknowledgement (Regression in MAKE-GCC-TOOLCHAIN
 after core-updates merge)
Message-ID: <handler.37876.B.157177299215379.ack <at> debbugs.gnu.org>
References: <MwJXRMmJFPPRGU2rlAVNuUk6Ge8fhPo2DoJBvEjy3fZ3zp8Bkrx7h-DKYDB2Z3bm2xQ409MTNcd7TtY8C4TzaB3cf_t0cf7i8pVk49rwseM=@carldong.me>
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Date: Tue, 22 Oct 2019 19:37:02 +0000

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Message sent to bug-guix@HIDDEN:

Subject: bug#37876: Regression in MAKE-GCC-TOOLCHAIN after core-updates merge
Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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To: Carl Dong <contact@HIDDEN>
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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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Date: Tue, 22 Oct 2019 23:09:02 +0200
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 (Carl Dong's message of "Tue, 22 Oct 2019 19:36:15 +0000")
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Hello,

Carl Dong <contact@HIDDEN> skribis:

> I believe there's been a recent regression w/re MAKE-GCC-TOOLCHAIN. I'm u=
nable
> to guix build the following minimal reproducer:
>
> (use-modules (gnu packages commencement)
>              (gnu packages gcc)
>              (gnu packages base))
>
> (make-gcc-toolchain gcc glibc-2.27)
>
> My guix describe output:
> Generation 33   Oct 22 2019 15:07:03    (current)
>   guix f5d6c88
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     commit: f5d6c88d0f5e1556295c1a19c46ddfcb7a23107f
>
> The build failure logs can be found here:
> https://www.dropbox.com/s/y7sg3m786ziiwvb/gcc-glibc-2.27-7.4.0.drv.log?dl=
=3D0

So we see tons of things like:

--8<---------------cut here---------------start------------->8---
In file included from /gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.2=
7/include/bits/fcntl.h:61:0,
                 from /gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.2=
7/include/fcntl.h:35,
                 from ../../gcc-7.4.0/gcc/system.h:349,
                 from ../../gcc-7.4.0/gcc/genchecksum.c:21:
/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/include/bits/fcntl-l=
inux.h:355:27: warning: ISO C++ forbids zero-size array =E2=80=98f_handle=
=E2=80=99 [-Wpedantic]
   unsigned char f_handle[0];
                           ^
In file included from ./bconfig.h:3:0,
                 from ../../gcc-7.4.0/gcc/genchecksum.c:20:
./auto-host.h:2363:16: error: declaration does not declare anything [-fperm=
issive]
 #define rlim_t long
                ^
/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/include/bits/resourc=
e.h:131:18: note: in expansion of macro =E2=80=98rlim_t=E2=80=99
 typedef __rlim_t rlim_t;
                  ^~~~~~
[=E2=80=A6]

../../gcc-7.4.0/gcc/system.h:540:20: error: conflicting declaration of C fu=
nction =E2=80=98const char* strsignal(int)=E2=80=99
 extern const char *strsignal (int);
                    ^~~~~~~~~
In file included from /gnu/store/x3jx25cd3q363mr7nbgzrhrv1vza6cf7-gcc-7.4.0=
/include/c++/cstring:42:0,
                 from ../../gcc-7.4.0/gcc/system.h:235,
                 from ../../gcc-7.4.0/gcc/genhooks.c:21:
/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/include/string.h:446=
:14: note: previous declaration =E2=80=98char* strsignal(int)=E2=80=99
 extern char *strsignal (int __sig) __THROW;
              ^~~~~~~~~

[=E2=80=A6]

In file included from ../../gcc-7.4.0/gcc/genmodes.c:21:0:
../../gcc-7.4.0/gcc/system.h:488:14: error: conflicting declaration of C fu=
nction =E2=80=98void* sbrk(int)=E2=80=99
 extern void *sbrk (int);
              ^~~~
In file included from ../../gcc-7.4.0/gcc/system.h:294:0,
                 from ../../gcc-7.4.0/gcc/genmodes.c:21:
/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/include/unistd.h:104=
4:14: note: previous declaration =E2=80=98void* sbrk(intptr_t)=E2=80=99
 extern void *sbrk (intptr_t __delta) __THROW;
              ^~~~

[=E2=80=A6]
make[1]: Leaving directory '/tmp/guix-build-gcc-glibc-2.27-7.4.0.drv-0/buil=
d'
make: *** [Makefile:934: all] Error 2
command "make" "-j" "48" "FLAGS_FOR_TARGET=3D-B/gnu/store/5k8l1l6j8sjws40xv=
lhs7hqjb68ylf7l-glibc-2.27/lib" "LDFLAGS_FOR_TARGET=3D-B/gnu/store/5k8l1l6j=
8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/lib -Wl,-dynamic-linker -Wl,/gnu/store/=
5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/lib/ld-linux-x86-64.so.2" "LDFL=
AGS=3D-Wl,-rpath=3D/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glibc-2.27/l=
ib -Wl,-dynamic-linker -Wl,/gnu/store/5k8l1l6j8sjws40xvlhs7hqjb68ylf7l-glib=
c-2.27/lib/ld-linux-x86-64.so.2" "BOOT_CFLAGS=3D-O2 -g0" failed with status
--8<---------------cut here---------------end--------------->8---

The =E2=80=98configure=E2=80=99 phase shows that =E2=80=98strsignal=E2=80=
=99 and =E2=80=98sbrk=E2=80=99 were not quite
found, but this is confusing:

--8<---------------cut here---------------start------------->8---
checking for strsignal... no
checking for pstat_getstatic... yes
checking for sysconf... no
checking for realpath... yes
checking for sysctl... yes
checking for setrlimit... yes
checking for sysmp... yes
checking for sbrk... no
checking for table... yes
checking for spawnve... no
checking for times... no
checking for spawnvpe... yes
checking for wait3... no
checking for strerror... yes
checking for wait4... yes
checking for strsignal... yes
[=E2=80=A6]
checking whether sbrk is declared... yes
--8<---------------cut here---------------end--------------->8---

Does it work with =E2=80=98glibc-2.28=E2=80=99?

We=E2=80=99re not building any such toolchain in CI but we probably should=
=E2=80=A6

Ludo=E2=80=99.

Message sent to bug-guix@HIDDEN:

Subject: bug#37876: Regression in MAKE-GCC-TOOLCHAIN after core-updates merge
Resent-From: Carl Dong <contact@HIDDEN>
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Reply-To: Carl Dong <contact@HIDDEN>
Date: Tue, 22 Oct 2019 23:17:30 +0000
From: Carl Dong <contact@HIDDEN>
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Hi Ludo=E2=80=99,

> Does it work with =E2=80=98glibc-2.28=E2=80=99?

Curiously... glibc-2.28 also doesn't work:
https://www.dropbox.com/s/ly7u4sf0umgz509/gcc-glibc-2.28-7.4.0.drv.log?dl=
=3D1

> We=E2=80=99re not building any such toolchain in CI but we probably shoul=
d=E2=80=A6

I think so too, happy to contribute a patch for the CI after we figure this=
 out.

Cheers,
Carl Dong
contact@HIDDEN
"I fight for the users"

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Hi all,

Looking closer at the code, the regression seems to be in MAKE-GCC-LIBC in =
(gnu
packages base), rather than in MAKE-GCC-TOOLCHAIN.

New minimal reproducer:

--8<---------------cut here---------------start------------->8---
(use-modules (gnu packages commencement)
             (gnu packages gcc)
             (gnu packages base))

(make-gcc-libc gcc glibc-2.28)
--8<---------------cut here---------------end--------------->8---

Cheers,
Carl Dong
contact@HIDDEN
"I fight for the users"

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