| ## Add support for thin LTO |
| |
| The `b_lto` option has been updated and now can be set to the value |
| `thin`. This enables [thin |
| LTO](https://clang.llvm.org/docs/ThinLTO.html) on all compilers where |
| it is supported. At the time of writing this means only Clang. |
| |
| This change is potentially backwards incompatible. If you have |
| examined the value of `b_lto` in your build file, note that its type |
| has changed from a boolean to a string. Thus comparisons like this: |
| |
| ```meson |
| if get_option('b_lto') |
| ... |
| endif |
| ``` |
| |
| need to be changed to something like this instead: |
| |
| ```meson |
| if get_option('b_lto') == 'true' |
| ... |
| endif |
| ``` |
| |
| This should not affect any comman line invocations as configuring LTO |
| with `-Db_lto=true` still works and behaves the same way as before. |
