Originally from
http://fastcgi.com/archives/fastcgi-developers/2005-December/004060.html

diff -ruN mod_fastcgi-2.4.2/fcgi.h mod_fastcgi-2.4.2-ap22/fcgi.h
--- fcgi.h    2003-02-04 00:07:37.000000000 +0100
+++ fcgi.h       2005-12-07 21:05:55.000000000 +0100
@@ -73,6 +73,36 @@
 #define ap_reset_timeout(a)
 #define ap_unblock_alarms()

+/* starting with apache 2.2 the backward-compatibility defines for
+ * 1.3 APIs are not available anymore. Define them ourselves here.
+ */
+#ifndef ap_copy_table
+
+#define ap_copy_table apr_table_copy
+#define ap_cpystrn apr_cpystrn
+#define ap_destroy_pool apr_pool_destroy
+#define ap_isspace apr_isspace
+#define ap_make_array apr_array_make
+#define ap_make_table apr_table_make
+#define ap_null_cleanup apr_pool_cleanup_null
+#define ap_palloc apr_palloc
+#define ap_pcalloc apr_pcalloc
+#define ap_psprintf apr_psprintf
+#define ap_pstrcat apr_pstrcat
+#define ap_pstrdup apr_pstrdup
+#define ap_pstrndup apr_pstrndup
+#define ap_push_array apr_array_push
+#define ap_register_cleanup apr_pool_cleanup_register
+#define ap_snprintf apr_snprintf
+#define ap_table_add apr_table_add
+#define ap_table_do apr_table_do
+#define ap_table_get apr_table_get
+#define ap_table_set apr_table_set
+#define ap_table_setn apr_table_setn
+#define ap_table_unset apr_table_unset
+
+#endif /* defined(ap_copy_table) */
+
 #if (defined(HAVE_WRITEV) && !HAVE_WRITEV && !defined(NO_WRITEV)) || defined WIN32
 #define NO_WRITEV
 #endif