[gdal-dev] Problems setting up the Windows build environment for first time

[Tom Moore]

Newbie here.  As the title says I am trying to set up a build environment.

I was trying to follow the instructions from the website: https://gdal.org/en/stable/development/dev_environment.html

I got to the step to install the compiler and got an error about conflicts and the process stopped.  Does anyone have a clue about what is going wrong here??  Output follows:

===== start of output

(gdal) C:\Users\tmoore> conda install --yes -c conda-forge compilers clcache
Channels:
- conda-forge
- defaults
Platform: win-64
Collecting package metadata (repodata.json): done
Solving environment: failed

LibMambaUnsatisfiableError: Encountered problems while solving:
  - nothing provides vc 10.* needed by python-3.4.5-0

Could not solve for environment specs
The following packages are incompatible
├─ clcache =* * is installable with the potential options
│  ├─ clcache 4.2.0 would require
│  │  └─ python >=3.10,<3.11.0a0 *, which can be installed;
│  ├─ clcache [4.1.0|4.2.0] would require
│  │  └─ python >=3.8,<3.9.0a0 *, which can be installed;
│  ├─ clcache [4.1.0|4.2.0] would require
│  │  └─ python >=3.9,<3.10.0a0 *, which can be installed;
│  ├─ clcache 3.3.0 would require
│  │  └─ python =3.4 * but there are no viable options
│  │     ├─ python 3.4.5 would require
│  │     │  └─ vc =10 *, which does not exist (perhaps a missing channel);
│  │     └─ python 3.4.5 would require
│  │        └─ vs2010_runtime =* *, which does not exist (perhaps a missing channel);
│  ├─ clcache [3.3.0|4.0.0|4.1.0] would require
│  │  └─ python [=3.5 *|>=3.5,<3.6.0a0 *], which can be installed;
│  ├─ clcache [4.0.0|4.1.0] would require
│  │  └─ python =3.6 *, which can be installed;
│  ├─ clcache [4.1.0|4.2.0] would require
│  │  └─ python >=3.6,<3.7.0a0 *, which can be installed;
│  └─ clcache 4.1.0 would require
│     └─ python >=3.7,<3.8.0a0 *, which can be installed;
└─ pin on python 3.13.* =* * is not installable because it requires
   └─ python =3.13 *, which conflicts with any installable versions previously reported.

Pins seem to be involved in the conflict. Currently pinned specs:
- python=3.13

==== end of output

Thanks, Tom

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