cmake: add initial support for CMake build

[nilason]

Added support for:

• i.hyper
• i.landsat
• i.landsat8.swlst
• i.points.auto
• r.flowaccumulation
• r.hypso
• r.in.vect
• r.skyline
• wx.metadata

Can be tested in combination with OSGeo/grass#6878.

[nilason]

I'll merge this as soon as possible to simplify testing of OSGeo/grass#6878. (This does not affect current autotools build anyway, so nothing will be broken).

[petrasovaa]

@nilason, these fail for me:

GRASS nc_spm_08_grass7/anna2:grass > g.extension r.flowaccumulation
Fetching <r.flowaccumulation> from <https://github.com/OSGeo/grass-addons/>
(be patient)...
...
Compiling...
-- Found PROJ: /usr/lib/x86_64-linux-gnu/cmake/proj (found version "9.4.0")
/usr/bin/ld: CMakeFiles/r.flowaccumulation.dir/main.c.o: undefined reference to symbol 'pow@@GLIBC_2.29'
/usr/bin/ld: /lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/r.flowaccumulation.dir/build.make:627: output/bin/r.flowaccumulation] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/r.flowaccumulation.dir/all] Error 2
gmake: *** [Makefile:136: all] Error 2
ERROR: Compilation failed, sorry. Please check above error messages.

GRASS nc_spm_08_grass7/anna2:grass > g.extension r.skyline
Fetching <r.skyline> from <https://github.com/OSGeo/grass-addons/> (be
patient)...
...
Compiling...
-- Found PROJ: /usr/lib/x86_64-linux-gnu/cmake/proj (found version "9.4.0")
/usr/bin/ld: CMakeFiles/r.skyline.dir/find_edges.c.o: undefined reference to symbol 'floor@@GLIBC_2.2.5'
/usr/bin/ld: /lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/r.skyline.dir/build.make:227: output/bin/r.skyline] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/r.skyline.dir/all] Error 2
gmake: *** [Makefile:136: all] Error 2
ERROR: Compilation failed, sorry. Please check above error messages.

[nilason]

@nilason, these fail for me:

GRASS nc_spm_08_grass7/anna2:grass > g.extension r.flowaccumulation
Fetching <r.flowaccumulation> from <https://github.com/OSGeo/grass-addons/>
(be patient)...
...
Compiling...
-- Found PROJ: /usr/lib/x86_64-linux-gnu/cmake/proj (found version "9.4.0")
/usr/bin/ld: CMakeFiles/r.flowaccumulation.dir/main.c.o: undefined reference to symbol 'pow@@GLIBC_2.29'
/usr/bin/ld: /lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/r.flowaccumulation.dir/build.make:627: output/bin/r.flowaccumulation] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/r.flowaccumulation.dir/all] Error 2
gmake: *** [Makefile:136: all] Error 2
ERROR: Compilation failed, sorry. Please check above error messages.

GRASS nc_spm_08_grass7/anna2:grass > g.extension r.skyline
Fetching <r.skyline> from <https://github.com/OSGeo/grass-addons/> (be
patient)...
...
Compiling...
-- Found PROJ: /usr/lib/x86_64-linux-gnu/cmake/proj (found version "9.4.0")
/usr/bin/ld: CMakeFiles/r.skyline.dir/find_edges.c.o: undefined reference to symbol 'floor@@GLIBC_2.2.5'
/usr/bin/ld: /lib/x86_64-linux-gnu/libm.so.6: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/r.skyline.dir/build.make:227: output/bin/r.skyline] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:85: CMakeFiles/r.skyline.dir/all] Error 2
gmake: *** [Makefile:136: all] Error 2
ERROR: Compilation failed, sorry. Please check above error messages.

Looks like missing math library.

[nilason]

I’ll update the Addons cmakelists.txt now after OSGeo/grass#7074.