Apparently, freebsd 4 doesn't like malloc.h, needs sys/param.h for MIN/MAX, and doesn't have a SIZE_MAX. For bug 3894.
@@ -0,0 +1,4 @@
+ o Build fixes:
+ - Clean up some code issues that prevented Tor from building on older
+ BSDs. Fixes bug 3894; reported by grarpamp.
+
@@ -417,6 +417,8 @@ dnl These headers are not essential
AC_CHECK_HEADERS(stdint.h sys/types.h inttypes.h sys/param.h sys/wait.h limits.h sys/limits.h netinet/in.h arpa/inet.h machine/limits.h syslog.h sys/time.h sys/resource.h inttypes.h utime.h sys/utime.h sys/mman.h netinet/in6.h malloc.h sys/syslimits.h malloc/malloc.h linux/types.h sys/file.h malloc_np.h sys/prctl.h)
+AC_CHECK_HEADERS(sys/param.h)
TOR_CHECK_PROTOTYPE(malloc_good_size, HAVE_MALLOC_GOOD_SIZE_PROTOTYPE,
[#ifdef HAVE_MALLOC_H
#include <malloc.h>
@@ -19,6 +19,9 @@
#include <ws2tcpip.h>
#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
@@ -182,6 +182,16 @@ typedef unsigned __int64 uint64_t;
+#ifndef SIZE_MAX
+#if SIZEOF_SIZE_T == 8
+#define SIZE_MAX UINT64_MAX
+#elif SIZEOF_SIZE_T == 4
+#define SIZE_MAX UINT32_MAX
+#else
+#error "Can't define SIZE_MAX"
#ifndef HAVE_SSIZE_T
#if SIZEOF_SIZE_T == 8
typedef int64_t ssize_t;
@@ -77,7 +77,7 @@
#include <malloc/malloc.h>
#ifdef HAVE_MALLOC_H
-#ifndef OPENBSD
+#if !defined(OPENBSD) && !defined(__FreeBSD__)
/* OpenBSD has a malloc.h, but for our purposes, it only exists in order to
* scold us for being so stupid as to autodetect its presence. To be fair,
* they've done this since 1996, when autoconf was only 5 years old. */