Re: math/pari 2.7.5 build failure on Linux (dlsym/dlerror/dlopen)

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Sat, May 07, 2016 at 12:31:08PM +0200, Matthias Ferdinand wrote:
> Hi,
> 
> math/pari 2.7.5 fails to build on Linux (Ubuntu 14.04, Debian 8):
> 
>     libtool: link: cc -o .libs/gp -O3 -Wall -fno-strict-aliasing -fomit-frame-pointer -I/opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/include -I/opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/include/ncurses -Wl,--export-dynamic -Wl,--enable-new-dtags -Wl,-rpath -Wl,/opt/pkgsrc/lib .libs/gp.o .libs/gp_init.o .libs/gp_rl.o .libs/highlvl.o .libs/whatnow.o .libs/plotport.o .libs/plotnull.o -Wl,-rpath -Wl,/opt/pkgsrc/lib -Wl,-rpath -Wl,/opt/pkgsrc/lib  -L/opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/lib -lm /opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/lib/libreadline.so -L../lib /opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/lib/libncurses.so ./.libs/libpari-gmp.so /opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/lib/libgmp.so  -Wl,-rpath -Wl,/opt/pkgsrc/work/pkgsrc/math/pari/default/.buildlink/lib -Wl,-rpath -Wl,/opt/pkgsrc/lib
> =>  ./.libs/libpari-gmp.so: undefined reference to `dlsym'
> =>  ./.libs/libpari-gmp.so: undefined reference to `dlerror'
> =>  ./.libs/libpari-gmp.so: undefined reference to `dlopen'
>     collect2: error: ld returned 1 exit status
>     Makefile:125: recipe for target 'gp' failed
>     gmake[2]: *** [gp] Error 1
>     gmake[2]: Leaving directory '/opt/pkgsrc/work/pkgsrc/math/pari/default/pari-2.7.5/Olinux-x86_64'
>     Makefile:33: recipe for target 'gp' failed
>     gmake[1]: *** [gp] Error 2
>     gmake[1]: Leaving directory '/opt/pkgsrc/work/pkgsrc/math/pari/default/pari-2.7.5'
>     Makefile:30: recipe for target 'all' failed
>     gmake: *** [all] Error 2
>     *** Error code 2
> 
> 
> Adding "-ldl" to LDFLAGS helps.

Does adding

.include "../../mk/dlopen.buildlink3.mk"

help?

If not, can you also add

DL_AUTO_VARS=	yes

in the pkgsrc Makefile and report if that helps?
 Thomas