many things, cosmo build!

Common/Std/nolibc.c

@@ -0,0 +1,46 @@
+/*
+  Generic no libc std parts.
+*/
+
+#include <stddef.h>
+
+/* Compiler depends on them with low optimization level. */
+void *memcpy(void *__restrict dest, const void *__restrict src, size_t n) {
+  for (size_t i = 0; i < n; ++i)
+    ((char *)dest)[i] = ((char *)src)[i];
+  return dest;
+};
+
+void *memset(void *__restrict dest, int s, size_t n) {
+  for (size_t i = 0; i < n; ++i)
+    ((char *)dest)[i] = s;
+  return dest;
+};
+
+size_t strlen(char const *s) {
+  char const *p = s;
+  for (; *p != 0; ++p) {
+  }
+  return p - s;
+}
+
+double com_std_sin(double v) {
+  double result;
+  __asm__ __volatile__("fldl %1\n\t"
+                       "fsin\n\t"
+                       "fstpl %0"
+                       : "=g"(result)
+                       : "m"(v)
+                       : "st", "st(1)");
+  return result;
+}
+
+double com_std_cos(double v) {
+  double result;
+  __asm__ __volatile__("fldl %1\n\t"
+                       "fcos\n\t"
+                       "fstpl %0"
+                       : "=g"(result)
+                       : "m"(v));
+  return result;
+}