a patch kit for building OpenGD77 with standard arm-none-eabi toolchain, no f**king slow MCUXpresso required.
old OpenGD77 release has Makefile for experimental use, but it is abondoned in recent release.
this patch kit is based on that Makefile.
the size of newlib and picolibc is larger than redlib, so all functions of OpenGD77 cannot store into MCU's ROM. currently, international language support is disabled -- English language only.
and, all components are optimized with -Os option to reduce size. some objects in original OpenGD77 is compiled with -O0 (no optimization), but this is required due to improper code (I reported at https://www.opengd77.com/viewtopic.php?f=16&t=2587 but rejected). I believe -Os binary works no problem, but not well tested.
WTFPL