[Playerstage-developers] Player SVN trunk: change the way link.txt is generated

[Paul O. <new...@ki...>]

Hi Geoff,

I was wondering if you can do something with a problem that I'm 
experiencing with link.txt files and SunCC C++ compiler. Looks like it is 
significant at link time what is the order of linker flags. I mean, it 
looks like linker flags should be always AFTER -o binary_name parameter. 
Strangely, this touches only C++ compiler, I never had to change link.txt 
files for C portions of Player distribution. At first I didn't know about 
the problem since (a matter of good luck?) link.txt for final player 
binary is done right:

/usr/bin/CC     -KPIC CMakeFiles/player.dir/server.o  -o player 
libplayerdrivers/libplayerdrivers.so.2.2.0 
../libplayercore/libplayercore.so.2.2.0 
../libplayercore/libplayererror.so.2
.2.0 ../libplayercore/libplayerutils.so.2.2.0 
../libplayertcp/libplayertcp.so.2.2.0 
../libplayertcp/libplayerudp.so.2.2.0 
../libplayerxdr/libplayerxdr.so.2.2.0 -lpthread -lrt -lltdl -l
dl -ljpeg -lsocket -lnsl -lz -lrt -lsocket -lnsl -lz -lrt -lcxcore -lcv 
-lhighgui -lcvaux -lml -lpng12 -ltiff -lgthread-2.0  -lcxcore -lcv 
-lhighgui -lcvaux -lml -lpng12 -ltiff -lgthre
ad-2.0  -lcxcore -lcv -lhighgui -lcvaux -lml -lpng12 -ltiff -lgthread-2.0 
-ljpeg -ljpeg  -lcxcore -lcv -lhighgui -lcvaux -lml -lpng12 -ltiff 
-lgthread-2.0  -lcxcore -lcv -lhighgui -lc
vaux -lml -lpng12 -ltiff -lgthread-2.0                    -lgdk_pixbuf-2.0 
-lm -lmlib -lgobject-2.0 -lgmodule-2.0 -lglib-2.0   -lgdk_pixbuf-2.0 -lm 
-lmlib -lgobject-2.0 -lgmodule-2.0 -
lglib-2.0          -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 
-lm -lmlib -lpangoxft-1.0 -lpangox-1.0 -lpango-1.0 -lgobject-2.0 
-lgmodule-2.0 -lglib-2.0  -lgdk_pixbuf-2.0 -l
m -lmlib -lgobject-2.0 -lgmodule-2.0 -lglib-2.0      -lgdk_pixbuf-2.0 -lm 
-lmlib -lgobject-2.0 -lgmodule-2.0 -lglib-2.0                         -lz 
../libplayerjpeg/libplayerjpeg.so.2.
2.0 -ljpeg ../libplayercore/libplayercore.so.2.2.0 -lpthread -lrt -lltdl 
-ldl ../libplayercore/libplayerutils.so.2.2.0 
../libplayercore/libplayererror.so.2.2.0 ../libplayerxdr/libplayerxdr.so.2.2.0 
-R/export/home/guest/psg22/src/build/server/libplayerdrivers:/export/home/guest/psg22/src/build/libplayercore:/export/home/guest/psg22/src/build/libplayertcp:/export/home
/guest/psg22/src/build/libplayerxdr:/export/home/guest/psg22/src/build/libplayerjpeg

(I'm not sure if -KPIC is considered if it is before '-o player', despite 
it works as it is).
Problem arised as more things were able to build with Suns compiler. See 
link.txt for pmaptest binary:

/usr/bin/CC     -KPIC  -lgsl -lgslcblas -lm 
CMakeFiles/pmaptest.dir/pmap_test.o  -o pmaptest  libpmap.so.2.2.0 
liblodo.so.2.2.0 -lGLU -lGL -lSM -lICE -lX11 -lXext -lsocket -lnsl -Bstat
ic -lglut -Bdynamic -lXmu -lXi ../../libplayercore/libplayercore.so.2.2.0 
../../libplayercore/libplayerutils.so.2.2.0 
../../libplayercore/libplayererror.so.2.2.0 ../../libplayerxdr/lib
playerxdr.so.2.2.0 -lpthread -lrt -lltdl -ldl 
-R/export/home/guest/psg22/lib

this causes compile time error as if -lgsl was ignored:
Linking CXX executable pmaptest
Undefined                       first referenced
  symbol                             in file
gsl_vector_get                      libpmap.so.2.2.0
gsl_vector_set                      libpmap.so.2.2.0
gsl_rng_taus                        libpmap.so.2.2.0
gsl_rng_free                        libpmap.so.2.2.0
gsl_set_error_handler_off           liblodo.so.2.2.0
gsl_vector_alloc                    libpmap.so.2.2.0
gsl_ran_discrete_free               libpmap.so.2.2.0
gsl_rng_alloc                       libpmap.so.2.2.0
gsl_vector_free                     libpmap.so.2.2.0
gsl_min_fminimizer_x_lower          liblodo.so.2.2.0
gsl_min_fminimizer_x_upper          liblodo.so.2.2.0
gsl_min_fminimizer_set              liblodo.so.2.2.0
gsl_ran_discrete                    libpmap.so.2.2.0
gsl_min_fminimizer_f_minimum        liblodo.so.2.2.0
gsl_min_fminimizer_x_minimum        liblodo.so.2.2.0
gsl_multimin_fdfminimizer_iterate   libpmap.so.2.2.0
gsl_vector_set_zero                 libpmap.so.2.2.0
gsl_multimin_fdfminimizer_x         libpmap.so.2.2.0
gsl_multimin_fdfminimizer_vector_bfgs libpmap.so.2.2.0
gsl_min_fminimizer_brent            liblodo.so.2.2.0
gsl_min_fminimizer_alloc            liblodo.so.2.2.0
gsl_multimin_fdfminimizer_minimum   libpmap.so.2.2.0
gsl_multimin_fdfminimizer_alloc     libpmap.so.2.2.0
gsl_ran_gaussian                    libpmap.so.2.2.0
gsl_min_fminimizer_iterate          liblodo.so.2.2.0
gsl_multimin_fdfminimizer_free      libpmap.so.2.2.0
gsl_multimin_fdfminimizer_set       libpmap.so.2.2.0
gsl_ran_discrete_preproc            libpmap.so.2.2.0
ld: fatal: Symbol referencing errors. No output written to pmaptest
*** Error code 1

Solution was little change in link.txt file:
/usr/bin/CC     CMakeFiles/pmaptest.dir/pmap_test.o  -o pmaptest 
libpmap.so.2.2.0 liblodo.so.2.2.0 -KPIC -lgsl -lgslcblas -lm -lGLU -lGL 
-lSM -lICE -lX11 -lXext -lsocket -lnsl -Bstati
c -lglut -Bdynamic -lXmu -lXi ../../libplayercore/libplayercore.so.2.2.0 
../../libplayercore/libplayerutils.so.2.2.0 
../../libplayercore/libplayererror.so.2.2.0 ../../libplayerxdr/libp
layerxdr.so.2.2.0 -lpthread -lrt -lltdl -ldl 
-R/export/home/guest/psg22/lib

Is it possible to cause cmake to generate link.txt always the same way as 
it is done for player binary?

Paul