From: Sam Roberts <sroberts@...>
Date: 2003-04-13T15:31:34+09:00
Subject: Re: Having trouble getting iconv-0.5 ... on OS X (actually extconf.rb bug)

Quoteing nobu.nokada@softhome.net, on Sun, Apr 13, 2003 at 02:15:54PM +0900:
> > Note that it found /usr/local/include/iconv.h, but failed to find iconv(), and
> > yet still created the Makefile. Why?
> 
> Some platforms don't need any additional libraries to use
> iconv(), because they have it in libc.

Sure, but isn't that what extconf.rb is checking, whether you need
-liconv?

> Rather, I'm curious why extconf.rb finds iconv.h in
> /usr/local/include.

/usr/local is in the default include and lib paths on OS X, it seems.

Anynow, I went back to having my iconv installed in /sw (kind of the
/opt of the OS X world). It allows iconv.h to be found, but the
extconf.rb still isn't figuring out that it needs -liconv, but it works
when I specify -liconv in the USER_LIBS.

Cheers,
Sam

[ensemble] ~/p/ruby/download/iconv-0.5 $ ruby extconf.rb --with-iconv-dir=/sw
checking for iconv.h... yes
checking for iconv() in -liconv... no
checking for rb_obj_freeze()... yes
checking for rb_block_given_p()... yes
checking for rb_str_buf_new()... no
creating Makefile
[ensemble] ~/p/ruby/download/iconv-0.5 $ touch iconv.c; make LOCAL_LIBS=; ruby  -I. -r iconv -e Iconv.iconv
gcc -fno-common   -g -Os -pipe -no-cpp-precomp   -pipe -pipe -no-precomp
-I. -I/usr/lib/ruby/1.6/powerpc-darwin6.0 -I. -I/usr/include
-DHAVE_ICONV_H -DHAVE_RB_OBJ_FREEZE -DHAVE_RB_BLOCK_GIVEN_P
-I/sw/include -c -o iconv.o iconv.c
gcc: unrecognized option `-no-precomp'
cc1: warning: changing search order for system directory "/usr/include"
cc1: warning:   as it has already been specified as a non-system
directory
cc -dynamic -bundle -undefined suppress -flat_namespace  -L/sw/lib
-L/usr/lib/ruby/1.6/powerpc-darwin6.0 -L/usr/lib  -o iconv.bundle
iconv.o   
dyld: ruby Undefined symbols:
_libiconv
_libiconv_close
_libiconv_open
Trace/BPT trap
[ensemble] ~/p/ruby/download/iconv-0.5 $ touch iconv.c; make LOCAL_LIBS=-liconv; ruby  -I. -r iconv -e Iconv.iconv
gcc -fno-common   -g -Os -pipe -no-cpp-precomp   -pipe -pipe -no-precomp
-I. -I/usr/lib/ruby/1.6/powerpc-darwin6.0 -I. -I/usr/include
-DHAVE_ICONV_H -DHAVE_RB_OBJ_FREEZE -DHAVE_RB_BLOCK_GIVEN_P
-I/sw/include -c -o iconv.o iconv.c
gcc: unrecognized option `-no-precomp'
cc1: warning: changing search order for system directory "/usr/include"
cc1: warning:   as it has already been specified as a non-system
directory
cc -dynamic -bundle -undefined suppress -flat_namespace  -L/sw/lib
-L/usr/lib/ruby/1.6/powerpc-darwin6.0 -L/usr/lib  -o iconv.bundle
iconv.o   -liconv
-e:1:in `iconv': wrong # of arguments (0 for 2) (ArgumentError)
        from -e:1
        [ensemble] ~/p/ruby/download/iconv-0.5 $