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Make GCC_PREFIX overridable via environment variable #328

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Oct 21, 2014
Merged

Make GCC_PREFIX overridable via environment variable #328

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12 changes: 12 additions & 0 deletions build/readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -63,3 +63,15 @@ make

This will then build the firmware as before, with the result placed in `build\core-firmware.bin`.

Specifying custom toolchain
---------------------------

Custom compiler prefix can be used via an environment variable `GCC_PREFIX`.

For example when you have installed a custom toolchain under
`/opt/gcc-arm-embedded-bin` you can use invoke make using that toolchain
like this:

```
GCC_PREFIX="/opt/gcc-arm-embedded-bin/bin/arm-none-eabi-" make
```
2 changes: 1 addition & 1 deletion build/tools.mk
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@@ -1,5 +1,5 @@
# Define the compiler/tools prefix
GCC_PREFIX = arm-none-eabi-
GCC_PREFIX ?= arm-none-eabi-

# Define tools
CC = $(GCC_PREFIX)gcc
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