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Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol

From: Kai Ruottu <kai dot ruottu at wippies dot com>
To: Jonathan Wakely <jwakely dot gcc at gmail dot com>, Cyd Haselton <chaselton at gmail dot com>
Cc: "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>
Date: Thu, 20 Nov 2014 00:14:30 +0200
Subject: Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
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19.11.2014, 20:51, Jonathan Wakely kirjoitti:

On 19 November 2014 18:08, Cyd Haselton wrote:

In another attempt to fix this problem, I grepped for dlopen in the
build directoryand ran across the following:

 From ./gcc/config.log

configure:27894: checking for library containing dlopen
configure:27925: gcc --sysroot=/usr/gcc-4.8/sysroot -o conftest -Wall
-mandroid -mbionic   -static-libstdc++ -static-libgcc
-Wl,--dynamic-linker=/system/bin/linker -lc -ldl -lgcc -lm -lsupc++
-lgnustl_shared conftest.c  >&5
configure:27925: $? = 0
configure:27942: result: none required:

And this, from liblto_plugin.la:
# The name that we can dlopen(3).
# Files to dlopen/dlpreopen
dlopen=''"


It seems to me as though configure needs to pick up libdl (which is
the android library to link to for dlopen...though i'm not sure how to
make this happen.

Thoughts?

It's already linking to libdl, look at the command it used.

It looks like the 'libgcc/config/t-slibgcc' could need a hack. TheSHLIB_LINK definitionthere has SHLIB_LC which as default is '-lc' but in this special case itshould be definedearlier as '-lc -ldl'... Probably making a custom template for the'arm*-linux-androideabi'case in the 'libgcc/config.host' would be the right way to patch thesupport in...

Follow-Ups:
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton

References:
- Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Marc Glisse
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Jonathan Wakely
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Cyd Haselton
- Re: Native GCC 4.9.0 Build Fails Building/Linking libgcc_s_so with Undefined Symbol
  - From: Jonathan Wakely

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