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Updated docs regarding CXXFLAGS etc. for LTO support

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Simon John 2016-09-08 15:48:04 +01:00
parent ab261ddd6e
commit 0b9ba23520
1 changed files with 12 additions and 12 deletions
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24
arduino-mk-vars.md
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@ -822,7 +822,7 @@ OBJDUMP_NAME = pic32-objdump
Archive utility.
Defaults to `avr-ar`
Defaults to `avr-ar` unless you're using toolchain > 4.8.0 in which case we use avr-gcc-ar.
**Example:**
@ -894,22 +894,22 @@ OPTIMIZATION_LEVEL = 3
Controls, *exclusively*, which C standard is to be used for compilation.
Defaults to `undefined`
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
Possible values:
* With `avr-gcc 4.3`, shipped with the Arduino IDE:
* With `avr-gcc 4.3`, shipped with the 1.0 Arduino IDE:
* `undefined`
* `-std=c99`
* `-std=gnu89` - This is the default for C code
* `-std=gnu99`
* With `avr-gcc 4.7, 4.8 or 4.9`, installed by you
* With `avr-gcc 4.7, 4.8 or 4.9`, installed by you or 1.5+ IDE:
* `undefined`
* `-std=c99`
* `-std=c11`
* `-std=gnu89` - This is the default for C code
* `-std=gnu89`
* `-std=gnu99`
* `-std=gnu11`
* `-std=gnu11 -flto -fno-fat-lto-objects` - This is the default for C code
For more information, please refer to the [Options Controlling C Dialect](https://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html)
@ -929,24 +929,24 @@ 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` on 1.5+
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+)
Possible values:
* With `avr-gcc 4.3`, shipped with the Arduino IDE:
* With `avr-gcc 4.3`, shipped with the 1.0 Arduino IDE:
* `undefined`
* `-std=c++98`
* `-std=c++0x`
* `-std=gnu++98` - This is the default for C code
* `-std=gnu++0x`
* With `avr-gcc 4.7, 4.8 or 4.9`, installed by you
* With `avr-gcc 4.7, 4.8 or 4.9`, installed by you or 1.5+ IDE:
* `undefined`
* `-std=c++98`
* `-std=c++11`
* `-std=c++1y`
* `-std=c++14`
* `-std=gnu++98` - This is the default for C++ code
* `-std=gnu++11`
* `-std=gnu++98`
* `-std=gnu++11 -fno-threadsafe-statics -flto` - This is the default for C++ code
* `-std=gnu++1y`
* `-std=gnu++14`
@ -988,7 +988,7 @@ CFLAGS += -my-c-only-flag
Flags passed to the compiler for files compiled as C++. Add more flags to this
variable using `+=`.
Defaults to all flags required for a typical build.
Defaults to `-fpermissive -fno-exceptions`
**Example:**