CentOS - Jun 2018 - ldd question on CentOS 6.8 (64bit)

Hi all,

Will ldd display the paths to different libraries depending on their locations?

I'm trying to build libxml2 version 2.9.6 in /usr/local with a newer version
of  zlib  (1.2.8) than what are in the system folders for CentOS 6.8.

I get the following output from ldd:

$ ldd ./libxml2.so
./libxml2.so: /lib64/libz.so.1: version `ZLIB_1.2.3.3' not found (required
by ./libxml2.so)
	linux-vdso.so.1 =>  (0x00007ffeb1789000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00007fce9e824000)
	libz.so.1 => /lib64/libz.so.1 (0x00007fce9e60e000)   <-- I expected
/usr/local/lib here
	libm.so.6 => /lib64/libm.so.6 (0x00007fce9e389000)
	libc.so.6 => /lib64/libc.so.6 (0x00007fce9dff5000)
	/lib64/ld-linux-x86-64.so.2 (0x0000003d52a00000)

Yet the make itself for libxml2 seemed to exit without error.
>From otool on Mac OSX (same installation of libxml2/zlib) I see:

%otool -L libxml2.2.dylib
libxml2.2.dylib:
        /usr/local/lib/libxml2.2.dylib (compatibility version 12.0.0, current
version 12.6.0)
        /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version
88.1.12)
        /usr/local/lib/libz.1.dylib (compatibility version 1.0.0, current
version 1.2.8)
        /usr/local/lib/libiconv.2.dylib (compatibility version 9.0.0, current
version 9.0.0)
        /usr/local/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current
version 1.0.0)

libxml2, libz and libiconv were all installed in /usr/local so as not to
over-write the OS versions.

Will ldd show similar correct paths for component libraries as otool does?

I'm trying to track down if there is an error in the Makefile target for the
link phase of the library.


Thanks,

--Ed

> Am 07.06.2018 um 15:43 schrieb ejm <mansky at mindspring.com>:
> 
> Hi all,
> 
> Will ldd display the paths to different libraries depending on their
locations?
> 
> I'm trying to build libxml2 version 2.9.6 in /usr/local with a newer
version of  zlib  (1.2.8) than what are in the system folders for CentOS 6.8.
> 
> I get the following output from ldd:
> 
> $ ldd ./libxml2.so
> ./libxml2.so: /lib64/libz.so.1: version `ZLIB_1.2.3.3' not found
(required by ./libxml2.so)
> 	linux-vdso.so.1 =>  (0x00007ffeb1789000)
> 	libdl.so.2 => /lib64/libdl.so.2 (0x00007fce9e824000)
> 	libz.so.1 => /lib64/libz.so.1 (0x00007fce9e60e000)   <-- I expected
/usr/local/lib here
> 	libm.so.6 => /lib64/libm.so.6 (0x00007fce9e389000)
> 	libc.so.6 => /lib64/libc.so.6 (0x00007fce9dff5000)
> 	/lib64/ld-linux-x86-64.so.2 (0x0000003d52a00000)
What about:

LD_LIBRARY_PATH=/usr/local/lib ldd ./libxml2.so

--
LF