[GRASS-dev] GRASS 6.5 GEOS build fails

[Markus Neteler]

On Tue, Jul 28, 2009 at 5:18 PM, Glynn Clements<glynn at gclements.plus.com> wrote:
> Moritz Lennert wrote:
>
>> > any clue how to compile 6.5 with GEOS support? Vlib fails:
>>
>> What did you feed configure ? It should be something like this:
>>
>> --with-geos=/usr/bin/geos-config
>>
>> This works for me with libgeos-3.0.0.
>
> Ah. With geos-2.2.3, the configure checks pass, but the build fails.
>
> The GEOS configure checks should actually do some checking. Apart from
> the version issue, there's no LOC_CHECK_LIBS or similar, so the checks
> will pass even if the library is entirely absent.
>
> LOC_CHECK_LIBS checks for a specific symbol, so it should be
> straightforward to check for a symbol which is only present in 3.x.

Something like this?
[neteler at localhost grass70]$ svn diff configure.in
Index: configure.in
===================================================================
--- configure.in        (revision 38604)
+++ configure.in        (working copy)
@@ -761,7 +761,7 @@
   fi

   LOC_CHECK_INCLUDES(geos_c.h,GEOS,$GEOS_CFLAGS)
-
+  LOC_CHECK_LIBS(geos,GEOSGeom_createLinearRing,GEOS,$GEOS_CFLAGS,$GEOS_LIBS,,,,)
   AC_DEFINE(HAVE_GEOS)
 fi

It generates:
cat config.log
....
configure:7637: checking whether to use GEOS
configure:7654: checking for geos-config
configure:7702: checking for geos_c.h
configure:7710: gcc -E -I/usr/include  conftest.c >/dev/null 2>conftest.out
configure:7745: checking for GEOSGeom_createLinearRing in -lgeos
configure:7762: gcc -o conftest -g -Wall
-Werror-implicit-function-declaration -fno-common -mtune=nocona -m64
-minline-all-stringops   -I/usr/include -Wl,--no-undefined
-Wl,--export-dynamic  -L/usr/lib64 conftest.c -lgeos   1>&5
/home/neteler/tmp/cckqk93a.o: In function `main':
/home/neteler/grass70/configure:7758: undefined reference to
`GEOSGeom_createLinearRing'
collect2: ld returned 1 exit status
...

(still no solution to the original problem:
 perhaps my much liked "-Werror-implicit-function-declaration" is the problem?)

Markus