[Bug build/28183] New: gcc-12 (HEAD) can't compile gcc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[Bug build/28183] New: gcc-12 (HEAD) can't compile gcc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

            Bug ID: 28183
           Summary: gcc-12 (HEAD) can't compile gcc due to new
                    arch-specific ISO_Fortran_binding.h header in gcc-12
           Product: glibc
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: slyfox at inbox dot ru
                CC: carlos at redhat dot com
  Target Milestone: ---

The symptom is early glibc build failure for 32-bit ABI on 64-bit multilib
system:

python3 -B ../scripts/gen-as-const.py --cc="x86_64-pc-linux-gnu-gcc -m32 -O2 
-std=gnu11 -fgnu89-inline  -O2 -Wall -Wwrite-strings -Wundef
-fmerge-all-constants -frounding-math -fstack-protector-strong -fno-common
-Wstrict-prototypes -Wold-style-definition -fmath-errno    
-ftls-model=initial-exec   -U_FORTIFY_SOURCE   -I../include
-I/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/csu

-I/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl
 -I../sysdeps/unix/sysv/linux/i386/i686  -I../sysdeps/i386/i686/nptl 
-I../sysdeps/unix/sysv/linux/i386  -I../sysdeps/unix/sysv/linux/x86/include
-I../sysdeps/unix/sysv/linux/x86  -I../sysdeps/x86/nptl  -I../sysdeps/i386/nptl
 -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux 
-I../sysdeps/nptl  -I../sysdeps/pthread  -I../sysdeps/gnu 
-I../sysdeps/unix/inet  -I../sysdeps/unix/sysv  -I../sysdeps/unix/i386 
-I../sysdeps/unix  -I../sysdeps/posix  -I../sysdeps/i386/i686/fpu/multiarch 
-I../sysdeps/i386/i686/fpu  -I../sysdeps/i386/i686/multiarch 
-I../sysdeps/i386/i686  -I../sysdeps/i386/fpu  -I../sysdeps/x86/fpu 
-I../sysdeps/i386  -I../sysdeps/x86/include -I../sysdeps/x86 
-I../sysdeps/wordsize-32  -I../sysdeps/ieee754/float128 
-I../sysdeps/ieee754/ldbl-96/include -I../sysdeps/ieee754/ldbl-96 
-I../sysdeps/ieee754/dbl-64  -I../sysdeps/ieee754/flt-32  -I../sysdeps/ieee754 
-I../sysdeps/generic  -I.. -I../libio -I. -nostdinc -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/32/include -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include-fixed -isystem /usr/include
-D_LIBC_REENTRANT -include
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/libc-modules.h
-DMODULE_NAME=libc -include ../include/libc-symbols.h      
-DTOP_NAMESPACE=glibc -DGEN_AS_CONST_HEADERS \
                   -MD -MP -MF
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/cpu-features-offsets.h.dT
\
                   -MT
'/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/cpu-features-offsets.h.d
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/cpu-features-offsets.h'"
\
          ../sysdeps/x86/cpu-features-offsets.sym >
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/cpu-features-offsets.hT
touch
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/gnu/lib-names-32.stmp
if test -r
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/csu/abi-tag.h.new;
then mv -f
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/csu/abi-tag.h.new
/tmp/portage-tmpdir/portage/sys-libs/glibc-9999/work/build-x86-x86_64-pc-linux-gnu-nptl/csu/abi-tag.h;
\
else echo >&2 'This configuration not matched in ../abi-tags'; exit 1; fi
<stdin>:1:10: fatal error: stddef.h: No such file or directory

gcc-11.2.0 works while gcc-12.0.0 does not.

I debugged it down to the following different in fresh gcc:

$ for d in include include-fixed; do h gcc-12.0.0 -m32 -print-file-name=$d;
done
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/32/include
/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include-fixed

$ for d in include include-fixed; do h gcc-11.2.0 -m32 -print-file-name=$d;
done
/usr/lib/gcc/x86_64-pc-linux-gnu/11.2.0/include
/usr/lib/gcc/x86_64-pc-linux-gnu/11.2.0/include-fixed

$ ls /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/32/include
ISO_Fortran_binding.h

glibc detects isystem at
https://sourceware.org/git/?p=glibc.git;a=blob;f=configure.ac;h=34ecbba540546337b5ec321fc6168c9544b39214;hb=HEAD#l1086

1086 # if using special system headers, find out the compiler's sekrit
1087 # header directory and add that to the list.  NOTE: Only does the right
1088 # thing on a system that doesn't need fixincludes.  (Not presently a
problem.)
1089 if test -n "$sysheaders"; then
1090   SYSINCLUDES=-nostdinc
1091   for d in include include-fixed; do
1092     i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" !=
"x$d" &&
1093     SYSINCLUDES="$SYSINCLUDES -isystem $i"
1094   done
...

I think the header difference is real and we should expect to stay for a while:

--- /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/32/include/ISO_Fortran_binding.h   
2021-08-03 17:21:45.915152915 +0100
+++ /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include/ISO_Fortran_binding.h      
2021-08-03 17:21:47.106164843 +0100
@@ -197,3 +197,3 @@
-#define CFI_type_int128_t -2
-#define CFI_type_int_least128_t -2
-#define CFI_type_int_fast128_t -2
+#define CFI_type_int128_t (CFI_type_Integer + (16 << CFI_type_kind_shift))
+#define CFI_type_int_least128_t (CFI_type_Integer + (16 <<
CFI_type_kind_shift))
+#define CFI_type_int_fast128_t (CFI_type_Integer + (16 <<
CFI_type_kind_shift))

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Sergei Trofimovich <slyfox at inbox dot ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gcc-12 (HEAD) can't compile |gcc-12 (HEAD) can't compile
                   |gcc due to new              |glibc due to new
                   |arch-specific               |arch-specific
                   |ISO_Fortran_binding.h       |ISO_Fortran_binding.h
                   |header in gcc-12            |header in gcc-12

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Sergei Trofimovich <slyfox at inbox dot ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=101305

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Sergei Trofimovich <slyfox at inbox dot ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sandra at codesourcery dot com

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyfox at inbox dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Proposed simple extension of `include` discovery as
https://sourceware.org/pipermail/libc-alpha/2021-August/129808.html

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sam at gentoo dot org,
                   |                            |toolchain at gentoo dot org

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-11 (branch tip) and gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[dilfridge at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Andreas K. Huettel <dilfridge at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dilfridge at gentoo dot org
           See Also|                            |https://bugs.gentoo.org/sho
                   |                            |w_bug.cgi?id=833620
            Summary|gcc-12 (HEAD) can't compile |gcc-11 (branch tip) and
                   |glibc due to new            |gcc-12 (HEAD) can't compile
                   |arch-specific               |glibc due to new
                   |ISO_Fortran_binding.h       |arch-specific
                   |header in gcc-12            |ISO_Fortran_binding.h
                   |                            |header in gcc-12

--- Comment #2 from Andreas K. Huettel <dilfridge at gentoo dot org> ---
Apparently the underlying change was backported to the gcc-11 branch
(where we now see it in Gentoo in a recent snapshot).

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-11 (branch as of 20220115) and gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[dilfridge at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Andreas K. Huettel <dilfridge at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gcc-11 (branch tip) and     |gcc-11 (branch as of
                   |gcc-12 (HEAD) can't compile |20220115) and gcc-12 (HEAD)
                   |glibc due to new            |can't compile glibc due to
                   |arch-specific               |new arch-specific
                   |ISO_Fortran_binding.h       |ISO_Fortran_binding.h
                   |header in gcc-12            |header in gcc-12

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[dilfridge at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Andreas K. Huettel <dilfridge at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gcc-11 (branch as of        |gcc-12 (HEAD) can't compile
                   |20220115) and gcc-12 (HEAD) |glibc due to new
                   |can't compile glibc due to  |arch-specific
                   |new arch-specific           |ISO_Fortran_binding.h
                   |ISO_Fortran_binding.h       |header in gcc-12
                   |header in gcc-12            |

--- Comment #3 from Andreas K. Huettel <dilfridge at gentoo dot org> ---
(In reply to Andreas K. Huettel from comment #2)
> Apparently the underlying change was backported to the gcc-11 branch
> (where we now see it in Gentoo in a recent snapshot).

We seem to be hitting something else (which looks very similar), sorry.

-- 
You are receiving this mail because:
You are on the CC list for the bug.

[Bug build/28183] gcc-12 (HEAD) can't compile glibc due to new arch-specific ISO_Fortran_binding.h header in gcc-12

[slyich at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28183

Sergei Trofimovich <slyich at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |OBSOLETE
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #4 from Sergei Trofimovich <slyich at gmail dot com> ---
I believe gcc rolled arch-specific headers back in
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=13beaf9e8d2d8264c0ad8f6504793fdcf26f3f73

Thus not an immediate failure.

Given that there was no feedback at all on the ML or IRC and I don't use
multilib gccs I'm closing it as OBSOLETE.

-- 
You are receiving this mail because:
You are on the CC list for the bug.