[GRASS-dev] compiling in osgeo4w - configure: error: *** Unable to locate zlib library.

[Helmut Kudrnovsky]

 hi,

I'm trying to compile a recent grass64svn in the osgeo4w-stack.

compiling fails with 

"
[...]
checking for location of zlib includes... 
checking for zlib.h... yes
checking for location of zlib library... 
checking for deflate in -lz... no
configure: error: *** Unable to locate zlib library."


from config.log

"[...]
int main() {
socket()
; return 0; }
configure:6867: checking for location of zlib includes
configure:6893: checking for zlib.h
configure:6901: gcc -E    -I/c/OSGeo4W/apps/gdal-16/include -I/c/OSGeo4W/include conftest.c >/dev/null 2>conftest.out
configure:6935: checking for location of zlib library
configure:6960: checking for deflate in -lz
configure:6977: gcc -o conftest.exe -g -O2    -I/c/OSGeo4W/apps/gdal-16/include -I/c/OSGeo4W/include   -Wl,--export-dynamic,--enable-runtime-pseudo-reloc  -L/c/OSGeo4W/apps/gdal-16/lib -L/c/OSGeo4W/lib conftest.c -lz   1>&5
c:\OSGeo4W\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot find -lz
collect2: ld returned 1 exit status
configure: failed program was:
#line 6966 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
 builtin and then its argument prototype would still apply.  */
char deflate();

int main() {
deflate()
; return 0; }" 



there are following files
C:\OSGeo4W\include\zlib.h
C:\OSGeo4W\lib\zlib.lib
C:\OSGeo4W\bin\zlib1.dll
C:\OSGeo4W\bin\zlib_osgeo.dll

(06.02.2008  01:38            73.728 zlib1.dll
04.02.2008  06:16            73.728 zlib_osgeo.dll)

just a few weeks ago, compiling in the osge4w-stack was ok. I can't remember that
I've changed anything with zlib in the osgeo4w-stack.

any hints?

best regards
Helmut

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