Bug #7279: Zlib load error on HP-UX

• Status: Feedback
• Priority: Normal
• Assignee: Nobuyoshi Nakada
• ruby -v: ruby 1.8.7 (2012-06-29 patchlevel 370) [hppa2.0w-hpux11.11]
• Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[Alex Harvey]

This was apparently a known issue on HP-UX and it is preventing me from compiling zlib
http://www.ruby-forum.com/topic/191987

To reproduce -

PA-RISC/HP-UX 11.11

swlist

...
gcc 4.2.3 gcc
libgcc 4.2.3 libgcc
m4 1.4.16 m4
make 3.82 make

/usr/local/bin/ruby extconf.rb --with-zlib-include=/usr/local/include --with-zlib-lib=/usr/local/lib

checking for deflateReset() in -lz... no
checking for deflateReset() in -llibz... no
checking for deflateReset() in -lzlib1... no
checking for deflateReset() in -lzlib... no
checking for deflateReset() in -lzdll... no

file /usr/local/lib/libz.sl

/usr/local/lib/libz.sl: PA-RISC1.1 shared library

file /usr/local/include/zlib.h

/usr/local/include/zlib.h: c program text

I have attached the mkmf.log.

[Alex Harvey]

I found a workaround.

There is some documentation of HP-UX PA-RISC compiler here
http://h21007.www2.hp.com/portal/site/dspp/menuitem.863c3e4cbcdc3f3515b49c108973a801?ciid=4727276391695110VgnVCM100000275d6e10RCRD

(There's probably a better one somewhere but that's the one I used.)

The +b option is used by the linker to embed a library path list in the executable for use at run time. However, if passing these options via CC or GCC then the option should be -Wl,+b. The mkmf.log file shows, however, that an unknown option +b is being passed directly to gcc.

After running configure I made the following change in config.status -

mv config.status config.status.orig
sed -e 's/^.*RPATHFLAG.*$/S["RPATHFLAG"]=" -Wl,+b%1$-s"/' config.status.orig >config.status
chmod +x config.status
./config.status

This results in /usr/local/lib/ruby/1.8/hppa2.0w-hpux11.11/rbconfig.rb having

# grep RPATHFLAG /usr/local/lib/ruby/1.8/hppa2.0w-hpux11.11/rbconfig.rb
  CONFIG["RPATHFLAG"] = " -Wl,+b%1$-s"

However, the make step still doesn't run properly because now -Wl,+b gets passed to ld, which is also wrong.

Thus after the make step has finished I made another change -

cd ext/zlib
mv Makefile Makefile.orig
sed -e 's#^LIBPATH.*$#LIBPATH =  -L. -L$(topdir) -L/usr/local/lib +b/usr/local/lib#' Makefile.orig >Makefile
make
cd ../..

That works fine. Then cd ../.. and make install and the zlib extension is installed.

Someone who understands how all this stuff works better than I do can hopefully turn this into an actual patch.

[Nobuyoshi Nakada]

• Project changed from Ruby 1.8 to Ruby trunk
• Status changed from Open to Feedback
• Assignee set to Nobuyoshi Nakada

=begin
Could you try this patch?

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index c9e738a..fe6f771 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -317,9 +317,9 @@ def link_command(ldflags, opt="", libpath=$DEFLIBPATH|$LIBPATH)
'CFLAGS' => "#$CFLAGS",
'ARCH_FLAG' => "#$ARCH_FLAG",
'LDFLAGS' => "#$LDFLAGS #{ldflags}",
- 'LIBPATH' => libpathflag(libpath),
'LOCAL_LIBS' => "#$LOCAL_LIBS #$libs",
'LIBS' => "#$LIBRUBYARG_STATIC #{opt} #$LIBS")
+ conf['LIBPATH'] = libpath.map {|s| LIBPATHFLAG % RbConfig::expand(s.dup, conf).quote}.join("")
Config::expand(TRY_LINK.dup, conf)
end
=end

[Nobuyoshi Nakada]

• File bug-7279.diff View added
• Category set to build
• Target version set to 2.0.0

[Yusuke Endoh]

• Target version changed from 2.0.0 to next minor

[Alex Harvey]

Hi Nobuyoshi,

Yes the patch works.

For people viewing this in the archives, it's worth knowing that patch and diff are different on HP-UX. To apply this patch -

cp -p lib/mkmf.rb lib/mkmf.rb.orig
cat <<'EOF' >mkmf.hpux.patch

*** lib/mkmf.rb.orig Sat Dec 4 17:34:10 2010
--- lib/mkmf.rb Wed Feb 13 16:29:18 2013

---

*** 317,325 ****
'CFLAGS' => "#$CFLAGS",
'ARCH_FLAG' => "#$ARCH_FLAG",
'LDFLAGS' => "#$LDFLAGS #{ldflags}",
- 'LIBPATH' => libpathflag(libpath),
'LOCAL_LIBS' => "#$LOCAL_LIBS #$libs",
'LIBS' => "#$LIBRUBYARG_STATIC #{opt} #$LIBS")
Config::expand(TRY_LINK.dup, conf)
end

--- 317,325 ----
'CFLAGS' => "#$CFLAGS",
'ARCH_FLAG' => "#$ARCH_FLAG",
'LDFLAGS' => "#$LDFLAGS #{ldflags}",
'LOCAL_LIBS' => "#$LOCAL_LIBS #$libs",
'LIBS' => "#$LIBRUBYARG_STATIC #{opt} #$LIBS")
+ conf['LIBPATH'] = libpath.map {|s| LIBPATHFLAG % RbConfig::expand(s.dup, conf).quote}.join("")
Config::expand(TRY_LINK.dup, conf)
end
EOF
patch lib/mkmf.rb <mkmf.hpux.patch