proposal: additional prefix to avoid name collision about printf HOT 3 OPEN

All exposed functions end with _, and there are defines which define the function name, e.g.

#define printf printf_
int printf_(const char* format, ...);

So IMHO there won't be a function name collision.

from printf.

I noticed that it does an:
#undef printf

which results in a linker error when it tries to pull the global printf into the std namespace:
toolchain-xtensa32\xtensa-esp32-elf\include\c++\5.2.0\cstdio:127:11: error: '::printf' has not been declared

I don't understand why it can't find the original printf defined in stdio.h, but the is included by a 3rd party library.

from printf.

On my fork, what I've done so far is make the aliasing of the standard-library function be disabled by default, with a CMake-controlled #define allowing it to happen if necessary.

from printf.