add missing compatibilty headers

.gitignore

@@ -60,9 +60,6 @@ config.c
 control.c
 include/imsg.h
 include/md5.h
-include/stdlib.h
-include/string.h
-include/sys/
 log.c
 ntp.c
 ntp.h

include/stdlib.h

@@ -0,0 +1,33 @@
+/*
+ * stdlib.h compatibility shim
+ * Public domain
+ */
+
+#include_next <stdlib.h>
+
+#ifndef LIBCOMPAT_STDLIB_H
+#define LIBCOMPAT_STDLIB_H
+
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <stdint.h>
+
+#ifndef HAVE_ARC4RANDOM_BUF
+uint32_t arc4random(void);
+uint32_t arc4random_uniform(uint32_t);
+#endif
+
+#ifndef HAVE_REALLOCARRAY
+void *reallocarray(void *, size_t, size_t);
+#endif
+
+#ifndef HAVE_SETPROCTITLE
+void setproctitle(const char *fmt, ...);
+#endif
+
+#ifndef HAVE_STRTONUM
+long long strtonum(const char *nptr, long long minval,
+		long long maxval, const char **errstr);
+#endif
+
+#endif

include/string.h

@@ -0,0 +1,69 @@
+/*
+ * Public domain
+ * string.h compatibility shim
+ */
+
+#include_next <string.h>
+
+#ifndef LIBCOMPAT_STRING_H
+#define LIBCOMPAT_STRING_H
+
+#include <sys/types.h>
+
+#if defined(__sun) || defined(__hpux)
+/* Some functions historically defined in string.h were placed in strings.h by
+ * SUS. Use the same hack as OS X and FreeBSD use to work around on Solaris and HPUX.
+ */
+#include <strings.h>
+#endif
+
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t siz);
+#endif
+
+#ifndef HAVE_STRLCAT
+size_t strlcat(char *dst, const char *src, size_t siz);
+#endif
+
+#ifndef HAVE_STRNDUP
+char * strndup(const char *str, size_t maxlen);
+/* the only user of strnlen is strndup, so only build it if needed */
+#ifndef HAVE_STRNLEN
+size_t strnlen(const char *str, size_t maxlen);
+#endif
+#endif
+
+#ifndef HAVE_EXPLICIT_BZERO
+void explicit_bzero(void *, size_t);
+#endif
+
+#ifndef HAVE_TIMINGSAFE_BCMP
+int timingsafe_bcmp(const void *b1, const void *b2, size_t n);
+#endif
+
+#ifndef HAVE_TIMINGSAFE_MEMCMP
+int timingsafe_memcmp(const void *b1, const void *b2, size_t len);
+#endif
+
+#ifndef HAVE_MEMMEM
+void * memmem(const void *big, size_t big_len, const void *little,
+	size_t little_len);
+#endif
+
+#ifdef _WIN32
+#include <errno.h>
+
+static inline char  *
+posix_strerror(int errnum)
+{
+	if (errnum == ECONNREFUSED) {
+		return "Connection refused";
+	}
+	return strerror(errnum);
+}
+
+#define strerror(errnum) posix_strerror(errnum)
+
+#endif
+
+#endif

include/sys/socket.h

@@ -0,0 +1,12 @@
+/*
+ * Public domain
+ * sys/socket.h compatibility shim
+ */
+
+#include_next <sys/socket.h>
+
+#ifndef SA_LEN
+#define SA_LEN(X) \
+	(((struct sockaddr*)(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : \
+	 ((struct sockaddr*)(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
+#endif

include/sys/time.h

@@ -0,0 +1,10 @@
+/*
+ * Public domain
+ * sys/time.h compatibility shim
+ */
+
+#include_next <sys/time.h>
+
+#include <stdint.h>
+
+int adjfreq(const int64_t *freq, int64_t *oldfreq);

include/sys/types.h

@@ -0,0 +1,25 @@
+/*
+ * Public domain
+ * sys/types.h compatibility shim
+ */
+
+#include_next <sys/types.h>
+
+#ifndef LIBCRYPTOCOMPAT_SYS_TYPES_H
+#define LIBCRYPTOCOMPAT_SYS_TYPES_H
+
+#include <stdint.h>
+
+#ifdef __MINGW32__
+#include <_bsd_types.h>
+#endif
+
+#if !defined(HAVE_ATTRIBUTE__DEAD) && !defined(__dead)
+#define __dead
+#endif
+
+#if !defined(HAVE_ATTRIBUTE__BOUNDED__) && !defined(__bounded__)
+# define __bounded__(x, y, z)
+#endif
+
+#endif