| ## Per-subproject language arguments are now applied |
| |
| Compiler and linker arguments set for a specific subproject, for example |
| `-Dsub:c_args=-DFOO` on the command line or `c_args` in the |
| `default_options` of a `subproject()` call, are now added to the compile |
| and link commands of that subproject's targets. Previously such values |
| were accepted and stored but silently ignored. |
| |
| Similarly, `<lang>_args` and `<lang>_link_args` entries in a target's |
| `override_options` now take effect. |
| |
| In all cases the per-subproject or per-target value replaces the global |
| value (including flags coming from environment variables such as |
| `CFLAGS`), it is not appended to it. This matches what |
| `get_option('c_args')` already returned inside a subproject. |
