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Better handle LTO_ENABLE (#9832)

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* Better handle LTO_ENABLE

Especially when calling from command line

* Replace LINK_TIME_OPTIMIZATION_ENABLE with LTO_ENABLE

* Remove long for LTO from show_options.mk
This commit is contained in:
Drashna Jaelre
2020-08-22 01:21:06 -07:00
committed by James Young
parent 3f392c09b6
commit 92385b3fb6
79 changed files with 85 additions and 99 deletions
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docs/config_options.md
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@@ -324,11 +324,9 @@ This is a [make](https://www.gnu.org/software/make/manual/make.html) file that i
```
* `LAYOUTS`
* A list of [layouts](feature_layouts.md) this keyboard supports.
* `LINK_TIME_OPTIMIZATION_ENABLE`
* `LTO_ENABLE`
* Enables Link Time Optimization (LTO) when compiling the keyboard. This makes the process take longer, but it can significantly reduce the compiled size (and since the firmware is small, the added time is not noticeable).
However, this will automatically disable the legacy TMK Macros and Functions features, as these break when LTO is enabled. It does this by automatically defining `NO_ACTION_MACRO` and `NO_ACTION_FUNCTION`. (Note: This does not affect QMK [Macros](feature_macros.md) and [Layers](feature_layers.md).)
* `LTO_ENABLE`
* Has the same meaning as `LINK_TIME_OPTIMIZATION_ENABLE`. You can use `LTO_ENABLE` instead of `LINK_TIME_OPTIMIZATION_ENABLE`.
## AVR MCU Options
* `MCU = atmega32u4`