[gdal-dev] Problem building GDAL with GEOS on Cygwin

[Marco Atzeri]

On 5/30/2018 1:04 AM, Roberto Ribeiro wrote:
> Hello list, I'm trying to build GDAL 2.3 on Cygwin, and have been 
> running amok with the GEOS option. I present the correct path for the 
> geos_config file during ./configure, it does not throw any error, but 
> after configuration is done, GEOS support is marked as "no". And, sure 
> enough, while the script runs:
> 
>      libwebp not found - WEBP support disabled
>      checking for bin... no
>      checking for sfcgal-config... no
> 
> This shows that it did find the file, else it'd show "checking for 
> geos-config", but it's not finding the bin dir (which is the same one 
> where geos_config is). How might I fix this?
> 
> P.S.: it's GEOS 3.6.3, compiled with cygwin, working.

check config.log output for guidance
on 2.3.0 with geos 3.5.1 the output is:

configure:32848: checking for geos-config
configure:32866: found /usr/bin/geos-config
configure:32879: result: /usr/bin/geos-config
configure:32979: checking for GEOS version >= 3.1.0
configure:33002: result: yes
configure:33032: checking for GEOSversion in -lgeos_c
configure:33058: gcc -o conftest.exe -I/usr/include   conftest.c -lgeos_c
        -L/usr/lib -lgeos_c >&5
configure:33058: $? = 0
configure:33067: result: yes
configure:33090: Using C API from GEOS 3.5.1