Fix [-Wundef] warning in main folder

Author: Girgias

main/explicit_bzero.c

@@ -28,7 +28,7 @@
 
 PHPAPI void php_explicit_bzero(void *dst, size_t siz)
 {
-#if HAVE_EXPLICIT_MEMSET
+#ifdef HAVE_EXPLICIT_MEMSET
     explicit_memset(dst, 0, siz);
 #elif defined(PHP_WIN32)
 	RtlSecureZeroMemory(dst, siz);

main/main.c

@@ -2498,7 +2498,7 @@ PHPAPI int php_execute_script(zend_file_handle *primary_file)
 {
 	zend_file_handle *prepend_file_p, *append_file_p;
 	zend_file_handle prepend_file, append_file;
-#if HAVE_BROKEN_GETCWD
+#ifdef HAVE_BROKEN_GETCWD
 	volatile int old_cwd_fd = -1;
 #else
 	char *old_cwd;
@@ -2525,7 +2525,7 @@ PHPAPI int php_execute_script(zend_file_handle *primary_file)
 		PG(during_request_startup) = 0;
 
 		if (primary_file->filename && !(SG(options) & SAPI_OPTION_NO_CHDIR)) {
-#if HAVE_BROKEN_GETCWD
+#ifdef HAVE_BROKEN_GETCWD
 			/* this looks nasty to me */
 			old_cwd_fd = open(".", 0);
 #else
@@ -2590,7 +2590,7 @@ PHPAPI int php_execute_script(zend_file_handle *primary_file)
 		} zend_end_try();
 	}
 
-#if HAVE_BROKEN_GETCWD
+#ifdef HAVE_BROKEN_GETCWD
 	if (old_cwd_fd != -1) {
 		fchdir(old_cwd_fd);
 		close(old_cwd_fd);

main/php.h

@@ -126,7 +126,7 @@ typedef int pid_t;
 #endif
 #include <assert.h>
 
-#if HAVE_UNIX_H
+#ifdef HAVE_UNIX_H
 #include <unix.h>
 #endif
 
@@ -293,10 +293,10 @@ END_EXTERN_C()
 #define php_ignore_value(x) ZEND_IGNORE_VALUE(x)
 
 /* global variables */
-#if !defined(PHP_WIN32)
+#ifndef PHP_WIN32
 #define php_sleep sleep
 extern char **environ;
-#endif	/* !defined(PHP_WIN32) */
+#endif	/* ifndef PHP_WIN32 */
 
 #ifdef PHP_PWRITE_64
 ssize_t pwrite(int, void *, size_t, off64_t);