Need ELF version of Makefile to build `stm32-neopixel` on Ubuntu

[MihaelIsaev]

I'm trying to build the stm32-neopixel project via make but getting error:

In file included from /workspaces/stm4/Sources/Support/Support.c:14:
In file included from /swift/toolchains/6.1-RELEASE/usr/lib/clang/17/include/stdint.h:56:
/usr/include/stdint.h:26:10: fatal error: 'bits/libc-header-start.h' file not found
   26 | #include <bits/libc-header-start.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
make: *** [Makefile:32: build] Error 1

OS: Ubuntu 20.04 aarch64
Swift version 6.1 (swift-6.1-RELEASE)
Target: aarch64-unknown-linux-gnu

stm32-blink and esp32 examples builds fine, but this one throws the error

UPD: same on Ubuntu 24.04

UPD1: same on Swift 6.2-dev

Swift version 6.2-dev (LLVM 81ab6d9f7e4810f, Swift 9cc1947527bacea)
Target: aarch64-unknown-linux-gnu
Build config: +assertions

UPD2: same on Ubuntu 24.04 on x68_64 machine with Swift 6.1, so it is not architecture specific

UPD3: Seems it is because Makefile is trying to build Mach-O while I need ELF

[kubamracek]

UPD3: Seems it is because Makefile is trying to build Mach-O while I need ELF

That's true, this is the reason. FYI I have an open PR that adds a new STM32 project with a similar structure to stm32-neopixel, and it is using ELF -- #104.