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## Can override find_program
It is now possible to override the result of `find_program` to point
to a custom program you want. The overriding is global and applies to
every subproject from there on. Here is how you would use it.
In master project
```meson
subproject('mydep')
```
In the called subproject:
```meson
prog = find_program('my_custom_script')
meson.override_find_program('mycodegen', prog)
```
In master project (or, in fact, any subproject):
```meson
genprog = find_program('mycodegen')
```
Now `genprog` points to the custom script. If the dependency had come
from the system, then it would point to the system version.
You can also use the return value of `configure_file()` to override
a program in the same way as above:
```meson
prog_script = configure_file(input : 'script.sh.in',
output : 'script.sh',
configuration : cdata)
meson.override_find_program('mycodegen', prog_script)
```
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