[Buildroot] [PATCH 1/1] libssh2: fix library search path issues when zlib support enabled

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Alexandre,

On Mon, 30 Jun 2014 11:43:06 +0000, COFFIGNAL Alexandre wrote:

> Yes this issue occurs only when  zlib-dev is installed in host system. (if I rename /usr/lib/libz.so in my host system, compilation works perfectly)  
> 
> Here compile error (without patch )
> 
> libtool: link: /bin/grep -E -e "^libssh2_.*" ".libs/libssh2.exp" > ".libs/libssh2.expT"
> libtool: link: mv -f ".libs/libssh2.expT" ".libs/libssh2.exp"
> libtool: link: echo "{ global:" > .libs/libssh2.ver
> libtool: link:  cat .libs/libssh2.exp | sed -e "s/\(.*\)/\1;/" >> .libs/libssh2.ver
> libtool: link:  echo "local: *; };" >> .libs/libssh2.ver
> libtool: link:  /home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/host/usr/bin/arm-linux-gnueabihf-gcc -shared  -fPIC -DPIC  .libs/channel.o .libs/comp.o .libs/crypt.o .libs/hostkey.o .libs/kex.o .libs/mac.o .libs/misc.o .libs/packet.o .libs/publickey.o .libs/scp.o .libs/session.o .libs/sftp.o .libs/userauth.o .libs/transport.o .libs/version.o .libs/knownhost.o .libs/agent.o .libs/openssl.o .libs/libgcrypt.o .libs/pem.o .libs/keepalive.o .libs/global.o   -Wl,-rpath -Wl,/home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/lib -L/home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/host/usr/arm-buildroot-linux-gnueabihf/sysroot/usr/lib -lssl -lcrypto -L/usr/lib -lz  -Os   -Wl,-soname -Wl,libssh2.so.1 -Wl,-version-script -Wl,.libs/libssh2.ver -o .libs/libssh2.so.1.0.1
> /home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld: cannot find /usr/lib/libc_nonshared.a
> collect2: error: ld returned 1 exit status
> make[3]: *** [libssh2.la] Erreur 1
> make[3]: quittant le r?pertoire ? /home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/build/libssh2-1.4.3/src ?
> make[2]: *** [all] Erreur 2
> make[2]: quittant le r?pertoire ? /home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/build/libssh2-1.4.3/src ?
> make[1]: *** [all-recursive] Erreur 1
> make[1]: quittant le r?pertoire ? /home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/build/libssh2-1.4.3 ?
> make: *** [/home/alexandre/Documents/Projets/Clients/ICE/Src/ice-buildroot-imx6/buildroot/output/build/libssh2-1.4.3/.stamp_built] Erreur 2
> 
> In this log, we can see link option : -L /usr/lib/ -lz  , that breaks compilation.

Thanks for getting back with those details. I'm surprised to not be
able to reproduce the issue, even though zlib-dev is installed on my
system as well. Could you post the contents of
output/build/libssh2-1.4.3/config.log ? Even though I agree with your
patch, I'd like to understand why the configure script is not picking
up first the cross-compiled zlib instead of the host zlib.

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com