[Bug build/26290] New: stubs-hard.h not installed when building for RPi

[Bug build/26290] New: stubs-hard.h not installed when building for RPi

[john.frankish at outlook dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

            Bug ID: 26290
           Summary: stubs-hard.h not installed when building for RPi
           Product: glibc
           Version: 2.31
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: john.frankish at outlook dot com
                CC: carlos at redhat dot com
  Target Milestone: ---

When compiling for RPi, "make install" does not install
/usr/include/gnu/stubs-hard.h causing subsequent builds to fail.

config.h
/* The ARM hard-float ABI is being used.  */
#define HAVE_ARM_PCS_VFP 1

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[Bug build/26290] stubs-hard.h not installed when building for RPi

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
I do not see a reference to any stubs-hard.h file in the glibc sources, so I'm
not sure how this can cause any problems?

In which context do you see build failures?

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[Bug build/26290] stubs-hard.h not installed when building for RPi

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2020-07-23
     Ever confirmed|0                           |1

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[Bug build/26290] stubs-hard.h not installed when building for RPi

[john.frankish at outlook dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #2 from john.frankish at outlook dot com ---
When compiling openssh-8.3p1 the ./configure gcc sanity check fails with:

configure:2931: gcc -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -o
conftest    conftest.c  >&5
In file included from /usr/include/features.h:489,                              
                 from /usr/include/bits/libc-header-start.h:33,                 
                 from /usr/include/stdio.h:27,                 
                 from conftest.c:9:                                             
/usr/include/gnu/stubs.h:10:11: fatal error: gnu/stubs-hard.h: No such file or
directory
   10 | # include <gnu/stubs-hard.h>                                            
      |           ^~~~~~~~~~~~~~~~~~                   
compilation terminated.

/usr/include/gnu/stubs.h contains:

#if !defined __ARM_PCS_VFP
# include <gnu/stubs-soft.h>
#endif
#if defined __ARM_PCS_VFP
# include <gnu/stubs-hard.h>
#endif

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[Bug build/26290] stubs-hard.h not installed when building for RPi

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |UNCONFIRMED
     Ever confirmed|1                           |0

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
Thanks. Someone familiar with how this is supposed to work for arm needs to
look at this.

On other targets, the stubs-*.h files are provided by completely different,
ABI-incompatible builds that share only /usr/include, but not much else.

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |drepper.fsp at gmail dot com
             Target|                            |arm
          Component|build                       |libc

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[john.frankish at outlook dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #4 from john.frankish at outlook dot com ---
If I understand correctly most armv6 cpu's are soft float, but those in the
RPi0/RPi1 are hard float, hence the distinction.

If I take stubs-hard.h from glibc-2.30 on the same distro then things work
fine.

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
See sysdeps/arm/configure.ac:

if test $libc_cv_arm_pcs_vfp = yes; then
  AC_DEFINE(HAVE_ARM_PCS_VFP)
  LIBC_CONFIG_VAR([default-abi], [hard])
else
  LIBC_CONFIG_VAR([default-abi], [soft])
fi

and sysdeps/unix/sysv/linux/arm/Makefile:

abi-variants := soft hard

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
This is working fine on openSUSE:

<https://build.opensuse.org/package/live_build_log/openSUSE:Factory:ARM/glibc:testsuite/standard/armv6l>

if test -r
/home/abuild/rpmbuild/BUILDROOT/glibc-2.31-6.3.arm/usr/include/gnu/stubs-hard.h
&& cmp -s /home/abuild/rpmbuild/BUILD/glibc-2.31/cc-base/stubs.h
/home/abuild/rpmbuild/BUILDROOT/glibc-2.31-6.3.arm/usr/include/gnu/stubs-hard.h;
\
then echo 'stubs.h unchanged'; \
else /usr/bin/install -c -m 644
/home/abuild/rpmbuild/BUILD/glibc-2.31/cc-base/stubs.h
/home/abuild/rpmbuild/BUILDROOT/glibc-2.31-6.3.arm/usr/include/gnu/stubs-hard.h;
fi

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
How did you configure glibc?

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[Bug libc/26290] stubs-hard.h not installed when building for RPi

[john.frankish at outlook dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=26290

--- Comment #8 from john.frankish at outlook dot com ---
CC="gcc -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" ../configure
--prefix=/usr --disable-werror --enable-kernel=4.9.22
--enable-stack-protector=strong --with-headers=/usr/include
libc_cv_slibdir=/lib --enable-obsolete-rpc --libexecdir=/usr/lib/glibc

(as an aside this still results in /usr/libexec/getconf/OSIX_V7_ILP32_OFF32,
etc)

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