From: Yusuke Endoh <redmine@...>
Date: 2010-05-28T02:46:06+09:00
Subject: [ruby-core:30472] [Bug #2826](Feedback) pthreads compilation failure on Solaris

Issue #2826 has been updated by Yusuke Endoh.

Status changed from Assigned to Feedback
Priority changed from Normal to Low

Hi, Fabian

Sorry for late response.


2010/2/28 Fabian Groffen <redmine@ruby-lang.org>:
> Original bug:
> http://bugs.gentoo.org/show_bug.cgi?id=307159

I don't know gentoo's packaging system.
USE=threads means ./configure --enable-pthread, right?
Could you show all configure options?


> Ruby's configure tries to find the right way to link against pthread libs by itself. ?This fails amongst others on Solaris. ?

Works for me with i386-pc-solaris2.11 on VirtualBox.

  compiling bigdecimal
  gmake[1]: Entering directory `/export/home/mame/work/ruby18/ext/bigdecimal'
  gcc -I. -I../.. -I../../. -I../.././ext/bigdecimal -DBASE=10000UL -DBASE_FIG=4  -D_FILE_OFFSET_BITS=64  -fPIC -g -O2   -c bigdecimal.c
  gcc -shared -o ../../.ext/i386-solaris2.11/bigdecimal.so bigdecimal.o -L. -L../.. -L.     -lpthread -lrt -ldl -lcrypt -lm   -lc
  gmake[1]: Leaving directory `/export/home/mame/work/ruby18/ext/bigdecimal'


> GCC itself knows fairly well how to link against pthreads libs using -pthread.
*snip*
> When -lpthread is replaced by -pthread (hence letting GCC inject the right linker arguments -- and in the correct order) this compiles fine.  I created a patch to configure.in for this, but it is quite hacky, and only serves as an indication.

Unfortunately, gcc3 seems not to understand -pthread:

  compiling bigdecimal
  gmake[1]: Entering directory `/export/home/mame/work/ruby18/ext/bigdecimal'
  gcc -I. -I../.. -I../../. -I../.././ext/bigdecimal -DBASE=10000UL -DBASE_FIG=4  -D_FILE_OFFSET_BITS=64  -fPIC -g -O2   -c bigdecimal.c
  gcc -shared -o ../../.ext/i386-solaris2.11/bigdecimal.so bigdecimal.o -L. -L../.. -L.     -pthread -lrt -ldl -lcrypt -lm   -lc
  gcc: unrecognized option `-pthread'
  gmake[1]: Leaving directory `/export/home/mame/work/ruby18/ext/bigdecimal'

  $ gcc -v
  Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.11/3.4.3/specs
  Configured with: /builds2/sfwnv-111a/usr/src/cmd/gcc/gcc-3.4.3/configure --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as --with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++,f77,objc --enable-shared
  Thread model: posix
  gcc version 3.4.3 (csl-sol210-3_4-20050802)


By searching with the error message, this seems to be solaris10's
problem or binutils/ld's, not ruby's.

  http://sourceware.org/bugzilla/show_bug.cgi?id=6431

So I change priority to Low.
If you get something indicating ruby's bug and/or a better patch,
please inform us.  Thanks!

-- 
Yusuke Endoh <mame@tsg.ne.jp>
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