avr-gcc 10.3 with C++ build scripts

Disclaimer: Scripts are provided as-is, if you encounter problems please raise an issue - while this toolchain is not our product, it is possible that someone will assist you. We (KP Labs) are using toolchin built with these scripts with success.

Build steps

1. Clone this repository

2. Download necessary sources (see table below)

3. Apply gcc.patch to GCC source directory: cd src/gcc-10.3.0 && patch -p0 < ../../gcc.patch

4. Execute build commands in following order (with current directory being root of this repository)

   1. make info - Verify paths are correct
   2. make binutils-linux - Builds binutils for Linux (e.g. avr-objcopy)
   3. make gcc-stage1-linux - Minimal avr-gcc for Linux
   4. make avr-libc - Compiles avr-libc using avr-gcc built in previous step
   5. make gcc-linux - Builds final avr-gcc compiler
   6. make gdb-linux - Builds avr-gdb for Linux
   7. make toolchain-linux - Combines all previously built artifacts into single folder

   At this point you should have working avr-gcc compiler with full C++ support

   Following steps are required to build toolchain for Windows x64 (requires MinG64W toolchain):

   8. make binutils-win64 - Builds binutils for Windows
   9. make gdb-win64 - Builds avr-gdb for Windows
   10. make toolchain-win64 - Combines all previously built artifacts into single folder along with required MinGW DLLs. Additionaly .tar.gz archive is created

Component	Version	Folder
Binutils	2.36	src/binutils-2.36
GCC	10.3.0	src/gcc-10.3.0
avr-libc	2.0.0	src/avr-libc-2.0.0
GDB	10.2	src/gdb-10.2

Build dependencies

Unfortunately I'm not able to easily provide list of required dependencies. build-essentials (or equivalent) is good start. If something is missing, each step will report what is missing.

Customizing

Each build step is described in separate Makefile in makes folder. You can tweak them to your needs. You probably would like to change number of make jobs. Artifacts from build steps are isolated so it is easy to rebuild e.g. only avr-libc from scratch by removing associated build & install folders without removing already build gcc-stage1.

Updating to newer versions of components would probably require update of gcc.patch. Please raise an issue in case of problems or successes.