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The old isARM() function was a portability trap. With the name it had, it seemed like the obviously correct function to use, but it didn't include Thumb. In the vast majority of cases where someone wants to ask "is the target Arm?", Thumb *should* be included. There are exactly 3 cases in the codebase where we do actually need to exclude Thumb, although one of those is in Aro and mirrors a check in Clang that is itself likely a bug. These rare cases can just add an extra isThumb() check.
Aro
A C compiler with the goal of providing fast compilation and low memory usage with good diagnostics.
Aro is included as an alternative C frontend in the Zig compiler
for translate-c and eventually compiling C files by translating them to Zig first.
Aro is developed in https://github.com/Vexu/arocc and the Zig dependency is
updated from there when needed.
Currently most of standard C is supported up to C23 and as are many of the common extensions from GNU, MSVC, and Clang
Basic code generation is supported for x86-64 linux and can produce a valid hello world:
$ cat hello.c
extern int printf(const char *restrict fmt, ...);
int main(void) {
printf("Hello, world!\n");
return 0;
}
$ zig build && ./zig-out/bin/arocc hello.c -o hello
$ ./hello
Hello, world!