diff options
| author | Simon John <git@the-jedi.co.uk> | 2016-10-11 15:23:36 +0100 |
|---|---|---|
| committer | Simon John <git@the-jedi.co.uk> | 2016-10-11 15:23:36 +0100 |
| commit | fe020380b604ea514594360eb77baaccd6533f68 (patch) | |
| tree | 14d01343ecb51210cd942dcd9863b286dbdda83d /arduino-mk-vars.md | |
| parent | f3f7684463a4b0de85adbeff11c90ecfbfb13edd (diff) | |
Changed LTO support check to avr-gcc > 4.9.0 as the 4.8.1 bundled with the IDE prior to 1.6.10
doesn't support LTO or plugins. Fixes Issue #456
So essentially LTO support will only be enabled with avr-gcc 4.9.2 which comes with 1.6.10 or later
and Debian, Ubuntu etc; not 4.8.1 which comes with IDE 1.6.9 and a few earlier versions.
Tested with:
* 1.6.8 (avr-gcc 4.8.1 which doesn't support LTO so uses avr-ar and doesn't set LTO flags)
* 1.6.12 (avr-gcc 4.9.2 which supports LTO so uses avr-gcc-ar and sets LTO flags)
* 1.0.5 with Debian avr-gcc 4.9.2 (supports LTO so uses avr-gcc-ar and sets LTO flags)
Diffstat (limited to 'arduino-mk-vars.md')
| -rw-r--r-- | arduino-mk-vars.md | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arduino-mk-vars.md b/arduino-mk-vars.md index 5085966..8c4d302 100644 --- a/arduino-mk-vars.md +++ b/arduino-mk-vars.md @@ -822,7 +822,7 @@ OBJDUMP_NAME = pic32-objdump Archive utility. -Defaults to `avr-ar` unless you're using toolchain > 4.8.0 in which case we use avr-gcc-ar. +Defaults to `avr-ar` unless you're using toolchain > 4.9.0 in which case we use avr-gcc-ar. **Example:** @@ -894,7 +894,7 @@ OPTIMIZATION_LEVEL = 3 Controls, *exclusively*, which C standard is to be used for compilation. -Defaults to `undefined` on 1.0.x or `-std=gnu11 -flto -fno-fat-lto-objects` on 1.5+ or if you install AVR toolchain > 4.8.0 +Defaults to `undefined` on 1.0.x or `-std=gnu11 -flto -fno-fat-lto-objects` on 1.5+ or if you install AVR toolchain > 4.9.0 Possible values: @@ -929,7 +929,7 @@ CFLAGS_STD = = -std=gnu89 Controls, *exclusively*, which C++ standard is to be used for compilation. -Defaults to `undefined` on 1.0 or `-std=gnu++11 -fno-threadsafe-statics -flto` on AVR toolchain > 4.8.0 (e.g. IDE 1.5+) +Defaults to `undefined` on 1.0 or `-std=gnu++11 -fno-threadsafe-statics -flto` on AVR toolchain > 4.9.0 (e.g. IDE 1.6.10+) Possible values: |