Rename IS_CALLABLE to MEMCACHE_IS_CALLABLE
Fixes:
warning: 'IS_CALLABLE' macro redefined [-Wmacro-redefined]
https://github.com/websupport-sk/pecl-memcache/commit/fc76c47f621d819328b62d62ac756b7502aef595
--- memcache.c.orig
+++ memcache.c
@@ -1006,7 +1006,7 @@ static void php_mmc_failure_callback(mmc_pool_t *pool, mmc_t *mmc, void *param T
 
 	/* check for userspace callback */
 	if (param != NULL && zend_hash_find(Z_OBJPROP_P((zval *)param), "_failureCallback", sizeof("_failureCallback"), (void **)&callback) == SUCCESS && Z_TYPE_PP(callback) != IS_NULL) {
-		if (IS_CALLABLE(*callback, 0, NULL)) {
+		if (MEMCACHE_IS_CALLABLE(*callback, 0, NULL)) {
 			zval *retval = NULL;
 			zval *host, *tcp_port, *udp_port, *error, *errnum;
 			zval **params[5];
@@ -1233,7 +1233,7 @@ PHP_FUNCTION(memcache_add_server)
 	}
 
 	if (failure_callback != NULL && Z_TYPE_P(failure_callback) != IS_NULL) {
-		if (!IS_CALLABLE(failure_callback, 0, NULL)) {
+		if (!MEMCACHE_IS_CALLABLE(failure_callback, 0, NULL)) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid failure callback");
 			RETURN_FALSE;
 		}
@@ -1295,7 +1295,7 @@ PHP_FUNCTION(memcache_set_server_params)
 	}
 
 	if (failure_callback != NULL && Z_TYPE_P(failure_callback) != IS_NULL) {
-		if (!IS_CALLABLE(failure_callback, 0, NULL)) {
+		if (!MEMCACHE_IS_CALLABLE(failure_callback, 0, NULL)) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid failure callback");
 			RETURN_FALSE;
 		}
@@ -1360,7 +1360,7 @@ PHP_FUNCTION(memcache_set_failure_callback)
 	}
 
 	if (Z_TYPE_P(failure_callback) != IS_NULL) {
-		if (!IS_CALLABLE(failure_callback, 0, NULL)) {
+		if (!MEMCACHE_IS_CALLABLE(failure_callback, 0, NULL)) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid failure callback");
 			RETURN_FALSE;
 		}
--- php_memcache.h.orig
+++ php_memcache.h
@@ -72,9 +72,9 @@ PHP_FUNCTION(memcache_flush);
 #define MMC_DEFAULT_CACHEDUMP_LIMIT	100		/* number of entries */
 
 #if (PHP_MAJOR_VERSION == 5) && (PHP_MINOR_VERSION >= 3)
-#   define IS_CALLABLE(cb_zv, flags, cb_sp) zend_is_callable((cb_zv), (flags), (cb_sp) TSRMLS_CC)
+#   define MEMCACHE_IS_CALLABLE(cb_zv, flags, cb_sp) zend_is_callable((cb_zv), (flags), (cb_sp) TSRMLS_CC)
 #else
-#   define IS_CALLABLE(cb_zv, flags, cb_sp) zend_is_callable((cb_zv), (flags), (cb_sp))
+#   define MEMCACHE_IS_CALLABLE(cb_zv, flags, cb_sp) zend_is_callable((cb_zv), (flags), (cb_sp))
 #endif
 
 /* internal functions */