[Bug build/17496] New: <builddir>/gnu/lib-names.h not generated

[Bug build/17496] New: <builddir>/gnu/lib-names.h not generated

[triegel at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

            Bug ID: 17496
           Summary: <builddir>/gnu/lib-names.h not generated
           Product: glibc
           Version: 2.21
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: triegel at redhat dot com
                CC: carlos at redhat dot com

After 93ae1ebaa6df1a0c188614bd0a601ab6e26711c5 (also see bug 14171),
gnu/lib-names.h isn't generated anymore, which breaks my build (including
from-scratch builds) because /usr/include/gnu/lib-names.h on my system doesn't
have a LIBGCC_S_SO entry:
../sysdeps/gnu/unwind-resume.c: In function ‘init’:
../sysdeps/gnu/unwind-resume.c:36: error: ‘LIBGCC_S_SO’ undeclared (first use
in this function).

Manually doing the following (on x86_64)
 make gnu/lib-names.h
 make gnu/lib-names-64.h
fixes the issue.

This is on a RHEL-6.5-based distro with GCC 4.4.7.

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Subject: [Bug build/17496] <builddir>/gnu/lib-names.h not generated
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https://sourceware.org/bugzilla/show_bug.cgi?id\x17496

Torvald Riegel <triegel at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jsm28 at gcc dot gnu.org

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[Bug build/17496] <builddir>/gnu/lib-names.h not generated

[schwab@linux-m68k.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
I cannot reproduce that.

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[Bug build/17496] <builddir>/gnu/lib-names.h not generated

[triegel at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

--- Comment #2 from Torvald Riegel <triegel at redhat dot com> ---
(In reply to Andreas Schwab from comment #1)
> I cannot reproduce that.

On RHEL 6.5?  Or which distro/GCC version did you use?
I've heard from others that they can't reproduce on Fedora 20 either.

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[Bug build/17496] <builddir>/gnu/lib-names.h not generated

[carlos at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

--- Comment #3 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Torvald Riegel from comment #2)
> (In reply to Andreas Schwab from comment #1)
> > I cannot reproduce that.
> 
> On RHEL 6.5?  Or which distro/GCC version did you use?
> I've heard from others that they can't reproduce on Fedora 20 either.

I can't reproduce on F20, but that doesn't mean it isn't a problem.

I'd like to know *why* it doesn't build.

I would also be curious to know Joseph's opinion since he reworked the rules
into Makerules and might have a better understanding of what is wrong with
either the environment or our rules.

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[Bug build/17496] <builddir>/gnu/lib-names.h not generated

[joseph at codesourcery dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
gnu/lib-names.h (and gnu/lib-names-$(default-abi).h) is in 
$(before-compile) and so should be generated before any .c files are 
compiled.

Maybe the additions to before-compile need to move further up Makerules 
before the dependencies on $(before-compile) are added, or something like 
that?

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[Bug build/17496] <builddir>/gnu/lib-names.h not generated

[roland at gnu dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17496

Roland McGrath <roland at gnu dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |roland at gnu dot org
         Resolution|---                         |FIXED

--- Comment #5 from Roland McGrath <roland at gnu dot org> ---
Fixed by 67c379871ed04c4494f3fb01b012504d6cf63f6e

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