libc: Implement functions used by libdrm

libc/generic/ansi/include/inttypes.h

@@ -89,6 +89,8 @@
 #define PRIxPTR "lx"
 #define PRIXPTR "lX"
 
+#define SCNu64 "lu"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

libc/generic/ansi/include/stdio.h

@@ -115,6 +115,9 @@ int getchar_unlocked(void);
 int putc_unlocked(int, FILE *);
 int putchar_unlocked(int);
 
+// GLIBC extensions.
+int asprintf(char **, const char *, ...);
+
 // Linux unlocked I/O extensions.
 
 void clearerr_unlocked(FILE *);

libc/generic/ansi/src/stdio-stubs.cpp

@@ -278,6 +278,12 @@ int putchar_unlocked(int) {
 	__builtin_unreachable();
 }
 
+// GLIBC extensions.
+int asprintf(char **, const char *, ...) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+
 // Linux unlocked I/O extensions.
 
 void clearerr_unlocked(FILE *) {

libc/generic/posix/include/mlibc/posix_string.h

@@ -7,6 +7,7 @@ extern "C" {
 #endif
 
 char *strdup(const char *string);
+char *strndup(const char *, size_t);
 
 #ifdef __cplusplus
 }

libc/generic/posix/src/posix_string.cpp

@@ -13,3 +13,8 @@ char *strdup(const char *string) {
 	return new_string;
 }
 
+char *strndup(const char *string, size_t) {
+	__ensure(!"Not implemented");
+	__builtin_unreachable();
+}
+