I have a few questions about building modules linked against libraries
that are installed in non-standard locations, and a specific question
about why I can't link to zlib on Solaris.
First, I want to provide instructions in a README that will work for
Perl >= 5.00503. What's the correct way to build a module that requires a
library that was installed in a non-standard location (for example, if
someone does not have root)?
In the past I've suggested using LIBS and CCFLAGS (or INC) as in this
example:
First, build some C application that installs a library (in $HOME/foo/lib
in this case):
$ ./configure --prefix=$HOME/foo
$ make && make install
Then build the Perl module like this:
$ cd perl
$ perl Makefile.PL \
CCFLAGS=-I$HOME/foo/include \
LIBS='-lz -L$HOME/foo/lib -lswish-e'
$ LD_RUN_PATH=$HOME/foo/lib make
- I'm not clear when to use INC vs. CCFLAGS.
- It would seem what I should do is simply *add* paths to existing
settings in Makefile.PL. Can that be done from the command line, or is
that inadvisable for some reason?
- It also seems that I only sometimes need to use LD_RUN_PATH (sometimes
it is set for me by MakeMaker). Is that an issue with the MakeMaker
version?
Now, a more specific question about zlib linking.
A few times now on Solaris machines I've had problems linking with zlib
and I'm not sure why.
For example, I remember an issue with libz and libxml2:
http://mail.gnome.org/archives/xml/2001-September/msg00088.html
Anyway, I think I'm specifying the paths correctly so I'm a bit lost to
why this isn't working (and why I'm able to build Compress::Zlib without
any problems):
Here's building the module (which links to zlib and also to libswish-e.a
installed in $HOME/brian/lib):
perl Makefile.PL \
INC=-I$HOME/brian/include \
LIBS="-L/usr/local/lib -lz -L$HOME/brian/lib -lswish-e"
Then the make line looks like:
LD_RUN_PATH="/usr/local/lib:/data/_g/lii/brian/lib" gcc -B/usr/ccs/bin/ -o
blib/arch/auto/SWISH/API/API.so
-R/usr/local/lib -R/data/_g/lii/brian/lib
-G -L/usr/local/lib API.o -L/usr/local/lib -lz
-L/data/_g/lii/brian/lib -lswish-e
Make test results in:
...fatal: relocation error: file blib/arch/auto/SWISH/API/API.so: symbol
compress2: referenced symbol not found at...
Here's the function in libz.a:
%nm /usr/local/lib/libz.a | grep compress2
[6] | 160| 168|FUNC |GLOB |0 |2 |compress2
and the unresolved
%nm blib/arch/auto/SWISH/API/API.so | grep compress2
[610] | 0| 0|NOTY |GLOB |0 |UNDEF |compress2
To compare, Compress::Zlib, which builds fine, builds like:
LD_RUN_PATH="/usr/local/lib" gcc -B/usr/ccs/bin/ -o
blib/arch/auto/Compress/Zlib/Zlib.so
-R/usr/local/lib -G -L/usr/local/lib Zlib.o
-L/usr/local/lib -lz
Which looks basically the same with regard to zlib. So I'm missing
something.
BTW - should the difference in compilers be an issues?
gcc version 3.2.1
This is perl, version 5.005_03 built for sun4-solaris
Compiler:
cc='gcc -B/usr/ccs/bin/', optimize='-O', gccversion=2.95.1 19990816 (release)
--
Bill Moseley [EMAIL PROTECTED]
