[Bug libc/14068] New: Split top-level config.h.in into machine dependent and machine independent pieces.

[Bug libc/14068] New: Split top-level config.h.in into machine dependent and machine independent pieces.

[carlos_odonell at mentor dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14068

             Bug #: 14068
           Summary: Split top-level config.h.in into machine dependent and
                    machine independent pieces.
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: carlos_odonell@mentor.com
        ReportedBy: carlos_odonell@mentor.com
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


At present the glibc sources have one top-level config.h.in file.

The config.h.in file contains several definitions for x86, x86_64, Power, and
ARM.

Logically speaking this file should contain only machine independent
definitions.

Instead each machine should have a config.h.in fragment that is aggregated
together with the top-level config.h.in to produce a final config.h.

At present each machine needs to add defines to the top-level config.h.in.

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[Bug libc/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[joseph at codesourcery dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14068

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-05-07 10:23:05 UTC ---
On Sun, 6 May 2012, carlos_odonell at mentor dot com wrote:

> The config.h.in file contains several definitions for x86, x86_64, Power, and
> ARM.

And SPARC (HAVE_AS_VIS3_SUPPORT, HAVE_GCC_GOTDATA).  And Linux-specific 
(__LINUX_KERNEL_VERSION).  And some Mach-specific defines 
(HAVE_HOST_PAGE_SIZE, HAVE_I386_IO_PERM_MODIFY, HAVE_I386_SET_GDT, 
HAVE_MIG_RETCODE - the last of these isn't used anywhere and for the 
middle two, only used in sysdeps/mach/hurd/i386/, I'd have thought glibc 
could just require the preferred answer to the test rather than 
conditioning things).  And one of the Power defines (BROKEN_PPC_ASM_CR0) 
actually has its configure test directly in the toplevel configure.in.

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[Bug libc/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[roland at gnu dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=14068

Roland McGrath <roland at gnu dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |roland at gnu dot org

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[Bug libc/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[carlos_odonell at mentor dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14068

--- Comment #2 from Carlos O'Donell <carlos_odonell at mentor dot com> 2012-05-07 20:12:51 UTC ---
As always we should look to see if any of these checks are still valid.

For example we could use `-ansi' instead of `-undef' in the implicit rule to
allow HAVE_ARM_PCS_VFP to go away and become simply %ifdef __ARM_PCS_VFP in
ARM's shlib-versions.

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[Bug libc/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[carlos at systemhalted dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=14068

Carlos O'Donell <carlos at systemhalted dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |carlos at systemhalted dot
                   |                            |org
         AssignedTo|carlos_odonell at mentor    |carlos at systemhalted dot
                   |dot com                     |org

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[Bug libc/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14068

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug build/14068] Split top-level config.h.in into machine dependent and machine independent pieces.

[jsm28 at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=14068

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|libc                        |build

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