arm: fixing libc

presets/arm32/skeleton.armtcc

@@ -0,0 +1,16 @@
+
+#include <string.h>
+#include <stdio.h>
+
+#define SERIAL_OUT ((int*)0x4000048)
+
+void putchar_(char c) {
+  *SERIAL_OUT = c;
+}
+
+int main() {
+  int x = 2024*2;
+  x /= 2; // TODO: we need this to bring in __aeabi_uldivmod() etc.
+  printf("Hello World! %d\n", x);
+  return 0;
+}

src/worker/platforms.ts

@@ -359,8 +359,8 @@ export var PLATFORM_PARAMS = {
       arch: 'arm32',
       define: ['__ARM__', 'DISABLE_UNIMPLEMENTED_LIBC_APIS', 'PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_SOFT'],
       extra_compile_args: ['-I./arch/arm/include', '-I./openlibm/include', '-I./openlibm/src', '-I./printf/src'],
-      extra_link_files: ['crt0.c', 'arm-libtcc1.a', 'libc.a'],
-      extra_link_args: ['arm-libtcc1.a', 'libc.a'],
+      extra_link_files: ['crt0.c', 'libtcc1.a', 'libc.a'],
+      extra_link_args: ['-ltcc1', '-lc'],
       crt0: 'crt0.c',
     },
   };