[build] cmake does not check that python[3] is a required dependency

[picca]

Hello,

while preparing the debian package, I got htis error message

I now need python for the build.

is it possible to switch to python3 by default ?

make[3]: Entering directory '/<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu'
[ 94%] Generating burst backprojection kernels
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/tools/make_burst_kernels.py tools/make_burst_kernels.py
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/common.in templates/common.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/definitions.in templates/definitions.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/z_template.in templates/z_template.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/center_template.in templates/center_template.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/lamino_template.in templates/lamino_template.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && /usr/bin/cmake -E copy /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/src/kernels/templates/roll_template.in templates/roll_template.in
cd /<<BUILDDIR>>/ufo-filters-0.14.0+dfsg1/obj-i686-linux-gnu/src/kernels && python tools/make_burst_kernels.py templates/z_template.in 1 2 4 8 16 > z_kernel.cl
/bin/sh: 1: python: not found
src/kernels/CMakeFiles/burst.dir/build.make:72: recipe for target 'src/kernels/z_kernel.cl' failed

[matze]

I now need python for the build.

Sorry, yes. We use a Python script to generate OpenCL kernels for laminographic reconstruction. I now added

is it possible to switch to python3 by default ?

I don't think this is the best solution just as with ufo-core because it will break builds on platforms without Python 3. I now look up whichever Python is active, so if Python 3 is it in your case it should work as well.