[libc] created integration tests for hdrgen

- added sorting to script so C headers are outputted in alpha order

libc/newhdrgen/tests/expected_output/string.h

@@ -0,0 +1,102 @@
+//===-- C standard library header string.h --------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_STRING_H
+#define LLVM_LIBC_STRING_H
+
+#include "__llvm-libc-common.h"
+
+#include "llvm-libc-macros/null-macro.h"
+
+#include <llvm-libc-types/size_t.h>
+
+__BEGIN_C_DECLS
+
+void * memccpy(void *__restrict, const void *__restrict, int, size_t);
+
+void * memchr(const void *, int, size_t);
+
+int memcmp(const void *, const void *, size_t);
+
+void * memcpy(void *__restrict, const void *__restrict, size_t);
+
+void * memmem(const void *, size_t, const void *, size_t);
+
+void * memmove(void *, const void *, size_t);
+
+void * mempcpy(void *__restrict, const void *__restrict, size_t);
+
+void * memrchr(const void *, int, size_t);
+
+void * memset(void *, int, size_t);
+
+void * memset_explicit(void *, int, size_t);
+
+char * stpcpy(char *__restrict, const char *__restrict);
+
+char * stpncpy(char *__restrict, const char *__restrict, size_t);
+
+char * strcasestr(const char *, const char *);
+
+char * strcat(char *__restrict, const char *__restrict);
+
+char * strchr(const char *, int);
+
+char * strchrnul(const char *, int);
+
+int strcmp(const char *, const char *);
+
+int strcoll(const char *, const char *);
+
+char * strcpy(char *__restrict, const char *__restrict);
+
+size_t strcspn(const char *, const char *);
+
+char * strdup(const char *);
+
+char * strerror(int);
+
+char * strerror_r(int, char *, size_t);
+
+size_t strlcat(const char *__restrict, const char *__restrict, size_t);
+
+size_t strlcpy(const char *__restrict, const char *__restrict, size_t);
+
+size_t strlen(const char *);
+
+char * strncat(char *, const char *, size_t);
+
+int strncmp(const char *, const char *, size_t);
+
+char * strncpy(char *__restrict, const char *__restrict, size_t);
+
+char * strndup(const char *, size_t);
+
+size_t strnlen(const char *, size_t);
+
+char * strpbrk(const char *, const char *);
+
+char * strrchr(const char *, int);
+
+char * strsep(char * *__restrict, const char *__restrict);
+
+char * strsignal(int);
+
+size_t strspn(const char *, const char *);
+
+char * strstr(const char *, const char *);
+
+char * strtok(char *__restrict, const char *__restrict);
+
+char * strtok_r(char *__restrict, const char *__restrict, char * *__restrict);
+
+size_t strxfrm(char *__restrict, const char *__restrict, size_t);
+
+__END_C_DECLS
+
+#endif // LLVM_LIBC_STRING_H

libc/newhdrgen/tests/input/string.h.def

@@ -0,0 +1,18 @@
+//===-- C standard library header string.h --------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_STRING_H
+#define LLVM_LIBC_STRING_H
+
+#include "__llvm-libc-common.h"
+
+#include "llvm-libc-macros/null-macro.h"
+
+%%public_api()
+
+#endif // LLVM_LIBC_STRING_H