[geos-devel] RFC7: Discontinue use of autotools

[Roger Bivand]

On Tue, 12 Jan 2021, Sandro Santilli wrote:

> On Tue, Jan 12, 2021 at 11:26:42AM +0100, Roger Bivand wrote:
>
>> (log out and reboot system)
>>
>> mkdir _build
>> cd _build
>> cmake ../geos-3.9.0
>> time make
>>
>> # real	0m12.358s
>> # user	0m8.308s
>> # sys	0m3.393s
>>
>> The ouput objects are being cached somewhere, and survive a reboot. They are
>> not in the Gnome wastebasket either (rm doesn't put them there).
>
> Are you using ccache ?
> Check out ~/.ccache

Thanks! This is correct, but I didn't see it advertised:

tar xvfj geos-3.9.0.tar.bz2
mkdir _build
cd _build
rm -rf ~/.ccache
cmake ../geos-3.9.0
# -- Check for working C compiler: /usr/lib64/ccache/cc - skipped
# -- Check for working CXX compiler: /usr/lib64/ccache/c++ - skipped
du -sm ~/.ccache
# 1	/home/rsb/.ccache
CCACHE_DISABLE=1 time make
# 8:24.54
du -sm ~/.ccache
# 1     /home/rsb/.ccache
cd ..
rm -rf _build
mkdir _build
cd _build
cmake ../geos-3.9.0
CCACHE_DISABLE=1 time make
# 7:32.33
du -sm ~/.ccache
# 1     /home/rsb/.ccache

cmake itself is also ccaching, but

CCACHE_DISABLE=1 time cmake ../geos-3.9.0

stops it. I put CCACHE_DISABLE=1 in a start-up file to be on the safe 
side. Now, rm -rf _build does remove all traces of the build.

Roger


>
> --strk;
>

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; e-mail: Roger.Bivand at nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en