misc/60243: Problem in calling kpathsea library from Python extension

[Kris Kennaway]

The following reply was made to PR misc/60243; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: Jin-Hwan Cho <chofchof at ktug.or.kr>
Cc: Kris Kennaway <kris at obsecurity.org>,
	freebsd-gnats-submit at FreeBSD.org
Subject: Re: misc/60243: Problem in calling kpathsea library from Python extension
Date: Sun, 22 Feb 2004 18:48:59 -0800

 On Mon, Feb 23, 2004 at 11:41:53AM +0900, Jin-Hwan Cho wrote:
 
 > >>Is there any way to use "hash_create" in the kpathsea library
 > >>instead of the standard libc?
 > >
 > >Sorry for the delay in responding to this.  Did you ever resolve this?
 > 
 > Surely. In my FreeBSD 5 machine, the command above gives exactly.
 > Here is another information of my libc.so.5.
 > 
 > /usr/lib$ ls -al libc.so.5
 > -r--r--r--  1 root  wheel  886848 Jun  5  2003 libc.so.5
 > /usr/lib$ objdump -f libc.so.5
 > 
 > libc.so.5:     file format elf32-i386-freebsd
 > architecture: i386, flags 0x00000150:
 > HAS_SYMS, DYNAMIC, D_PAGED
 > start address 0x0001c470
 
 OK, you have an old 5.x installation.  It was fixed at some point in
 the last 8 months.
 
 > >I wonder if you are linking to libc before libkpathsea (e.g. -lc
 > >-lkpathsea); symbols are resolved to the first library in the sequence
 > >that contains them.
 > 
 > I already new because there was some discussion on that topic in the
 > TeX world. Here is the compiling commands generated by Python.
 > 
 > ~/test/kpathsea$ python setup.py build
 > running build
 > running build_ext
 > building 'kpse' extension
 > creating build
 > creating build/temp.freebsd-5.1-RELEASE-i386-2.2
 > cc -DNDEBUG -O -pipe -mcpu=pentiumpro -D_THREAD_SAFE -fPIC 
 > -DHASH_SHARED -I/usr/local/include -I/usr/local/include/python2.2 -c 
 > kpse_module.c -o build/temp.freebsd-5.1-RELEASE-i386-2.2/kpse_module.o
 > creating build/lib.freebsd-5.1-RELEASE-i386-2.2
 > cc -shared -lc_r build/temp.freebsd-5.1-RELEASE-i386-2.2/kpse_module.o 
 > -L/usr/local/lib -lkpathsea -o 
 > build/lib.freebsd-5.1-RELEASE-i386-2.2/kpse.so
 > 
 > I tried the last link command without -lc_r and -lkpathsea -lc_r, etc.
 > But all failed. Could you tell me what I missed?
 > 
 > >Also, I can't reproduce that libc.so.5 contains the hash_create symbol:
 > >
 > >kkenn at enigma:/lib objdump -T libc.so.5 | grep hash
 > >00000000000000e8 l    d  .hash  0000000000000000
 > >000000000003b4a0 g    DF .text  0000000000000020 uuid_hash
 > >00000000001ee970 g    DO .data  0000000000000008 __default_hash
 > >00000000000cff00 g    DF .text  0000000000000040 __call_hash
 > >00000000000cec80 g    DF .text  00000000000003a4 __hash_open
 > 
 > Is your operating system FreeBSD? My machine does not have the directory
 > /lib. Actually I tested my code in another operating systems, but no
 > problem yet; even there was no problem in Mac OS X.
 
 FreeBSD 5.2 moved a number of libraries from /usr/lib to /lib to allow
 a dynamically-linked root partition.  This aspect is unrelated to your
 problem, but it sounds like upgrading to 5.2-RELEASE will fix it
 anyway.
 
 Kris