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Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc

From: Ian Lance Taylor <iant at google dot com>
To: "H.J. Lu" <hjl dot tools at gmail dot com>
Cc: "Joseph S. Myers" <joseph at codesourcery dot com>, gcc-patches at gcc dot gnu dot org
Date: Thu, 18 Mar 2010 12:47:59 -0700
Subject: Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
References: <20100315213439.GA2858@intel.com> <6dc9ffc81003180659u247e471fq3255f8264396a986@mail.gmail.com> <mcr4okd8qim.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <Pine.LNX.4.64.1003181822230.19807@digraph.polyomino.org.uk> <6dc9ffc81003181144g3ab5f70cr93ccb1049b082591@mail.gmail.com> <6dc9ffc81003181157q4cceb637pa6a8dea11e7a8f9a@mail.gmail.com> <mcrvdct7783.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <6dc9ffc81003181238n694bf9a8s5b5a2c7bdbb765d@mail.gmail.com>

"H.J. Lu" <hjl.tools@gmail.com> writes:

> There are many "%inherit":
>
> ./libgcc-std.ver:%inherit GCC_3.3 GCC_3.0
> ./libgcc-std.ver:%inherit GCC_3.3.1 GCC_3.3
> ./libgcc-std.ver:%inherit GCC_3.3.2 GCC_3.3.1
> ./libgcc-std.ver:%inherit GCC_3.3.4 GCC_3.3.2
> ./libgcc-std.ver:%inherit GCC_3.4 GCC_3.3.4
> ./libgcc-std.ver:%inherit GCC_3.4.2 GCC_3.4
> ./libgcc-std.ver:%inherit GCC_3.4.4 GCC_3.4.2
> ./libgcc-std.ver:%inherit GCC_4.0.0 GCC_3.4.4
> ./libgcc-std.ver:%inherit GCC_4.1.0 GCC_4.0.0
> ./libgcc-std.ver:%inherit GCC_4.2.0 GCC_4.1.0
> ./libgcc-std.ver:%inherit GCC_4.3.0 GCC_4.2.0
> ./libgcc-std.ver:%inherit GCC_4.4.0 GCC_4.3.0

These are all fine, of course.

> ./config/m32r/libgcc-glibc.ver:%inherit GCC_3.0 GLIBC_2.3
> ./config/sparc/libgcc-sparc-glibc.ver:%inherit GCC_3.0 GLIBC_VER
> ./config/sparc/libgcc-sparc-glibc.ver:%inherit GCC_LDBL_3.0 GCC_3.0
> ./config/sparc/libgcc-sparc-glibc.ver:%inherit GCC_LDBL_4.0.0 GCC_4.0.0
> ./config/alpha/libgcc-alpha-ldbl.ver:%inherit GCC_LDBL_3.0 GCC_3.0
> ./config/alpha/libgcc-alpha-ldbl.ver:%inherit GCC_LDBL_4.0.0 GCC_4.0.0
> ./config/sh/libgcc-glibc.ver:%inherit GCC_3.0 GLIBC_2.2
> ./config/i386/libgcc-glibc.ver:%inherit GCC_3.0 GLIBC_2.0
> ./config/libgcc-glibc.ver:%inherit GCC_3.0 GLIBC_2.0
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.3 GCC_3.0
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.3.1 GCC_3.3
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.3.2 GCC_3.3.1
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.3.4 GCC_3.3.2
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.4 GCC_3.3.4
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.4.2 GCC_3.4
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_3.4.4 GCC_3.4.2
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_4.0.0 GCC_3.4.4
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_4.1.0 GCC_4.0.0
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_4.2.0 GCC_4.1.0
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_4.3.0 GCC_4.2.0
> ./config/bfin/libgcc-bfin.ver:%inherit GCC_4.4.0 GCC_4.3.0

These are fine as long as they precisely duplicate ones in
libgcc-std.ver, or refer to names which are not in libgcc-std.ver.

It's other cases that can be problematic over time.

Ian

References:
- PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: H.J. Lu
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: Ian Lance Taylor
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: Joseph S. Myers
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: H.J. Lu
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: H.J. Lu
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: Ian Lance Taylor
- Re: Fwd: PATCH: PR target/43383: __extendxftf2 not exported from 32-bit shared libgcc
  - From: H.J. Lu

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