Port libcork to FreeBSD

This patch should work for any 4.3 Net2 code base or newer, but we
are only testing on FreeBSD.

CMakeLists.txt

@@ -21,7 +21,8 @@ execute_process(COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/version.sh
     OUTPUT_VARIABLE VERSION
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 if(VERSION_RESULT)
-    message(FATAL_ERROR "Cannot determine version number")
+    message(FATAL_ERROR
+            "Cannot determine version number: " ${VERSION_RESULT})
 endif(VERSION_RESULT)
 # This causes an annoying extra prompt in ccmake.
 # message("Current version: " ${VERSION})

include/libcork/config/bsd.h

@@ -0,0 +1,34 @@
+/* -*- coding: utf-8 -*-
+ * ----------------------------------------------------------------------
+ * Copyright © 2013, RedJack, LLC.
+ * All rights reserved.
+ *
+ * Please see the COPYING file in this distribution for license
+ * details.
+ * ----------------------------------------------------------------------
+ */
+
+#ifndef LIBCORK_CONFIG_BSD_H
+#define LIBCORK_CONFIG_BSD_H
+
+/*-----------------------------------------------------------------------
+ * Endianness
+ */
+
+#include <sys/endian.h>
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define CORK_CONFIG_IS_BIG_ENDIAN      1
+#define CORK_CONFIG_IS_LITTLE_ENDIAN   0
+#elif BYTE_ORDER == LITTLE_ENDIAN
+#define CORK_CONFIG_IS_BIG_ENDIAN      0
+#define CORK_CONFIG_IS_LITTLE_ENDIAN   1
+#else
+#error "Cannot determine system endianness"
+#endif
+
+#define CORK_HAVE_REALLOCF  1
+#define CORK_HAVE_PTHREADS  1
+
+
+#endif /* LIBCORK_CONFIG_BSD_H */

include/libcork/config/config.h

@@ -1,6 +1,6 @@
 /* -*- coding: utf-8 -*-
  * ----------------------------------------------------------------------
- * Copyright © 2011-2012, RedJack, LLC.
+ * Copyright © 2011-2013, RedJack, LLC.
  * All rights reserved.
  *
  * Please see the COPYING file in this distribution for license
@@ -34,6 +34,11 @@
 
 
 /**** PLATFORMS ****/
+#if (defined(__unix__) || defined(unix)) && !defined(USG)
+/* We need this to test for BSD, but it's a good idea to have for
+ * any brand of Unix.*/
+#include <sys/param.h>
+#endif
 
 #if defined(__linux)
 /* Do some Linux-specific autodetection. */
@@ -43,6 +48,10 @@
 /* Do some Mac OS X-specific autodetection. */
 #include <libcork/config/macosx.h>
 
+#elif defined(BSD) && (BSD >= 199103)
+/* Do some BSD (4.3 code base or newer)specific autodetection. */
+#include <libcork/config/bsd.h>
+
 #endif  /* platforms */
 
 

make-dist.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 PROJECT=libcork
 

run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # Usage: run.sh [debug|release] program arguments
 #
 # Runs a program from one of the build directories, with

src/libcork/posix/env.c

@@ -17,7 +17,21 @@
 #include "libcork/os/subprocess.h"
 #include "libcork/helpers/errors.h"
 
-extern const char  **environ;
+#if defined(__APPLE__)
+/* Apple doesn't provide access to the "environ" variable from a shared library.
+ * There's a workaround function to grab the environ pointer described at [1].
+ *
+ * [1] http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man7/environ.7.html
+ */
+#include <crt_externs.h>
+#define environ  (*_NSGetEnviron())
+
+#else
+/* On all other POSIX platforms, we assume that environ is available in shared
+ * libraries. */
+extern char  **environ;
+
+#endif
 
 
 struct cork_env_var {
@@ -74,7 +88,7 @@ cork_env_add_internal(struct cork_env *env, const char *name, const char *value)
 struct cork_env *
 cork_env_clone_current(void)
 {
-    const char  **curr;
+    char  **curr;
     struct cork_env  *env = cork_env_new();
 
     for (curr = environ; *curr != NULL; curr++) {
@@ -157,33 +171,15 @@ cork_env_set_vars(struct cork_hash_table_entry *entry, void *user_data)
     return CORK_HASH_TABLE_MAP_CONTINUE;
 }
 
-#if defined(__APPLE__)
-/* Apple doesn't provide clearenv(), and it also doesn't let us access the
- * "environ" variable from a shared library.  There's a workaround function to
- * grab the environ pointer described at [1].
- *
- * [1] http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man7/environ.7.html
- */
-
-#include <crt_externs.h>
-
-static void
-clearenv(void)
-{
-    char  ***ns_environ = _NSGetEnviron();
-    **ns_environ = NULL;
-}
-
-#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__OpenBSD__)
-/* A handful of other platforms [1] don't provide clearenv(), but do allow us to
- * access the environ pointer directly.
+#if defined(__APPLE__) || (defined(BSD) && (BSD >= 199103))
+/* A handful of platforms [1] don't provide clearenv(), so we must implement our
+ * own version that clears the environ array directly.
  *
  * [1] http://www.gnu.org/software/gnulib/manual/html_node/clearenv.html
  */
 static void
 clearenv(void)
 {
-    extern char  **environ;
     *environ = NULL;
 }
 

version.sh

@@ -1,6 +1,6 @@
-#!/bin/bash
+#!/bin/sh
 # ----------------------------------------------------------------------
-# Copyright © 2011, RedJack, LLC.
+# Copyright © 2011-2013, RedJack, LLC.
 # All rights reserved.
 #
 # Please see the COPYING file in this distribution for license