Here is the application I am trying to build:
#include <string.h>
#include <stdio.h>
int main() {
printf("hello world\n");
return 0;
}
Here is my output with the brew installed compiler:
> arm-none-eabi-gcc test.c
test.c:1:10: fatal error: string.h: No such file or directory
1 | #include <string.h>
| ^~~~~~~~~~
compilation terminated.
Here is my output with the compiler I downloaded from ARM. (These errors are expected (I'm trying to figure out why this is happening with the newer arm toolchain) - and when I compile a full embedded project this compiler works (albeit with similar warnings), and the homebrew installed one does not)
~
> /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/arm-none-eabi-gcc test.c
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-exit.o): in function `exit':
exit.c:(.text.exit+0x28): undefined reference to `_exit'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-closer.o): in function `_close_r':
closer.c:(.text._close_r+0x18): undefined reference to `_close'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-fstatr.o): in function `_fstat_r':
fstatr.c:(.text._fstat_r+0x1c): undefined reference to `_fstat'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-isattyr.o): in function `_isatty_r':
isattyr.c:(.text._isatty_r+0x18): undefined reference to `_isatty'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-lseekr.o): in function `_lseek_r':
lseekr.c:(.text._lseek_r+0x24): undefined reference to `_lseek'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-readr.o): in function `_read_r':
readr.c:(.text._read_r+0x24): undefined reference to `_read'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-sbrkr.o): in function `_sbrk_r':
sbrkr.c:(.text._sbrk_r+0x18): undefined reference to `_sbrk'
/Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/bin/ld: /Applications/ArmGNUToolchain/13.2.Rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/13.2.1/../../../../arm-none-eabi/lib/libc.a(libc_a-writer.o): in function `_write_r':
writer.c:(.text._write_r+0x24): undefined reference to `_write'
collect2: error: ld returned 1 exit status
Why can't the homebrew installed compiler find the standard headers? I suspect the warnings generated and the headers not being found are somehow related, and that I don't understand what is going on with the standard library implementations in this toolchain.
no "stdint.h" in arm-none-eabi-gcc(mac)
I found this to solve my issue.
TLDR:
Uninstall arm-none-eabi-gcc from brew and install the toolchain with:
brew install --cask gcc-arm-embedded