[GRASS5] v.voronoi fails to build

[Markus Neteler]

On Thu, Oct 14, 2004 at 01:13:28PM +0100, Glynn Clements wrote:
> 
> Markus Neteler wrote:
> 
> > > The new v.voronoi fails to build,
> > > 
> > > 
> > > "libgrasss_raster.so not found, needed by libgrass_display.so"
> > > 
> > > libgrass_display.so: undefined reference to `R_pad_delete'
> > 
> > On RH7/RH9/MDK10 no problem. Which OS/platform are you refering to?
> 
> AFAICT, the error will occur if the shared libraries aren't in a
> directory where the loader would normally find them.

You are right. I forgot that I linked the libgrass* into
/usr/local/lib for QGIS convenience (yes, one could also write
a startup script for QGIS and extend the LD_LIBRARY_PATH).

> The link command for shared libraries on Linux (possibly other
> platforms) should include:
> 
> 	-Wl,-rpath-link,$(ARCH_LIBDIR)
> 
> This will tell the linker to look in $(ARCH_LIBDIR) for shared
> libraries which aren't explicitly linked via a -l switch but are
> dependencies of other shared libraries.

Should this go into aclocal.m4?

There is something like this for Linux:
   747		Linux*)
   748		    SHLIB_CFLAGS="-fPIC"
   749		    SHLIB_LD_LIBS='${LIBS}'
   750		    SHLIB_SUFFIX=".so"
   751	
   752		    CFLAGS_OPTIMIZE=-O2
   753		    # egcs-2.91.66 on Redhat Linux 6.0 generates lots of warnings 
   754		    # when you inline the string and math operations.  Turn this off to
   755		    # get rid of the warnings.
   756		    #CFLAGS_OPTIMIZE="${CFLAGS_OPTIMIZE} -D__NO_STRING_INLINES -D__NO_MATH_INLINES"
   757	
   758		    if test "$have_dl" = yes; then
   759			SHLIB_LD="${CC} -shared"
   760			LDFLAGS="-Wl,--export-dynamic"
   761			CC_SEARCH_FLAGS='-Wl,-rpath-link,${LIB_RUNTIME_DIR}'
   762			LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
   763		    else
   764			AC_CHECK_HEADER(dld.h, [
   765			    SHLIB_LD="ld -shared"
   766			    LDFLAGS=""
   767			    CC_SEARCH_FLAGS=""
   768			    LD_SEARCH_FLAGS=""])
   769		    fi

Markus