Sync #if/ifdef/defined (-Wundef) (#14623)

These are either define (to value 1) or undefined:
- __GNUC__
- DBA_CDB_BUILTIN
- DBA_GDBM
- HAVE_FORK
- HAVE_PUTENV
- HAVE_SETENV
- HAVE_SYS_SELECT_H
- HAVE_SYS_SOCKET_H
- HAVE_SYS_WAIT_H
- HAVE_UNSETENV
- RFC3678_API
- ZEND_ENABLE_ZVAL_LONG64
- ZTS

Follow-up of GH-5526

ext/dba/dba_cdb.c

@@ -30,7 +30,7 @@
 #endif
 #include <fcntl.h>
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 # include "libcdb/cdb.h"
 # include "libcdb/cdb_make.h"
 # include "libcdb/uint32.h"
@@ -45,7 +45,7 @@
 
 typedef struct {
 	struct cdb c;
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	struct cdb_make m;
 	php_stream *file;
 	int make;
@@ -58,7 +58,7 @@ typedef struct {
 
 DBA_OPEN_FUNC(cdb)
 {
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	php_stream* file = 0;
 	int make;
 #else
@@ -69,7 +69,7 @@ DBA_OPEN_FUNC(cdb)
 
 	switch (info->mode) {
 		case DBA_READER:
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 			make = 0;
 			file = info->fp;
 #else
@@ -80,7 +80,7 @@ DBA_OPEN_FUNC(cdb)
 			}
 #endif
 			break;
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 		case DBA_TRUNC:
 			make = 1;
 			file = info->fp;
@@ -98,7 +98,7 @@ DBA_OPEN_FUNC(cdb)
 	cdb = pemalloc(sizeof(dba_cdb), info->flags&DBA_PERSISTENT);
 	memset(cdb, 0, sizeof(dba_cdb));
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (make) {
 		cdb_make_start(&cdb->m, file);
 	} else {
@@ -119,7 +119,7 @@ DBA_CLOSE_FUNC(cdb)
 	CDB_INFO;
 
 	/* cdb_free does not close associated file */
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (cdb->make) {
 		cdb_make_finish(&cdb->m);
 	} else {
@@ -132,7 +132,7 @@ DBA_CLOSE_FUNC(cdb)
 	pefree(cdb, info->flags&DBA_PERSISTENT);
 }
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 # define php_cdb_read(cdb, buf, len, pos) cdb_read(cdb, buf, len, pos)
 # define php_cdb_findnext(cdb, key, len) cdb_findnext(cdb, key, len)
 # define php_cdb_find(cdb, key, len) cdb_find(cdb, key, len)
@@ -148,7 +148,7 @@ DBA_FETCH_FUNC(cdb)
 	zend_string *fetched_val = NULL;
 	unsigned int len;
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (cdb->make)
 		return NULL; /* database was opened writeonly */
 #endif
@@ -173,7 +173,7 @@ DBA_FETCH_FUNC(cdb)
 
 DBA_UPDATE_FUNC(cdb)
 {
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	CDB_INFO;
 
 	if (!cdb->make)
@@ -190,7 +190,7 @@ DBA_EXISTS_FUNC(cdb)
 {
 	CDB_INFO;
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (cdb->make)
 		return FAILURE; /* database was opened writeonly */
 #endif
@@ -205,7 +205,7 @@ DBA_DELETE_FUNC(cdb)
 }
 
 /* {{{ cdb_file_read */
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 # define cdb_file_read(fildes, buf, size) php_stream_read(fildes, buf, size)
 #else
 # define cdb_file_read(fildes, buf, size) read(fildes, buf, size)
@@ -218,7 +218,7 @@ DBA_DELETE_FUNC(cdb)
 
 /* {{{ cdb_file_lseek
  php_stream_seek does not return actual position */
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 zend_off_t cdb_file_lseek(php_stream *fp, zend_off_t offset, int whence) {
 	php_stream_seek(fp, offset, whence);
 	return php_stream_tell(fp);
@@ -243,7 +243,7 @@ DBA_FIRSTKEY_FUNC(cdb)
 	char buf[8];
 	zend_string *key;
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (cdb->make)
 		return NULL; /* database was opened writeonly */
 #endif
@@ -283,7 +283,7 @@ DBA_NEXTKEY_FUNC(cdb)
 	char buf[8];
 	zend_string *key;
 
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (cdb->make)
 		return NULL; /* database was opened writeonly */
 #endif
@@ -319,7 +319,7 @@ DBA_SYNC_FUNC(cdb)
 
 DBA_INFO_FUNC(cdb)
 {
-#if DBA_CDB_BUILTIN
+#ifdef DBA_CDB_BUILTIN
 	if (!strcmp(hnd->name, "cdb")) {
 		return estrdup(cdb_version());
 	} else {

ext/dba/dba_dbm.c

@@ -188,7 +188,7 @@ DBA_SYNC_FUNC(dbm)
 
 DBA_INFO_FUNC(dbm)
 {
-#if DBA_GDBM
+#ifdef DBA_GDBM
 	if (!strcmp(DBM_VERSION, "GDBM"))
 	{
 		return dba_info_gdbm(hnd, info);

ext/opcache/ZendAccelerator.c

@@ -2181,7 +2181,7 @@ zend_op_array *persistent_compile_file(zend_file_handle *file_handle, int type)
 		ZCSG(hits)++; /* TBFixed: may lose one hit */
 		persistent_script->dynamic_members.hits++; /* see above */
 #else
-#if ZEND_ENABLE_ZVAL_LONG64
+#ifdef ZEND_ENABLE_ZVAL_LONG64
 		InterlockedIncrement64(&ZCSG(hits));
 		InterlockedIncrement64(&persistent_script->dynamic_members.hits);
 #else

ext/sockets/multicast.c

@@ -560,7 +560,7 @@ static int _php_mcast_source_op(
 #endif
 }
 
-#if RFC3678_API
+#ifdef RFC3678_API
 static int _php_source_op_to_rfc3678_op(enum source_op sop)
 {
 	switch (sop) {

ext/sockets/php_sockets.h

@@ -41,7 +41,7 @@ extern zend_module_entry sockets_module_entry;
 #ifdef PHP_WIN32
 #include <Winsock2.h>
 #else
-#if HAVE_SYS_SOCKET_H
+#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
 #endif

ext/standard/basic_functions.c

@@ -122,7 +122,7 @@ typedef struct _user_tick_function_entry {
 	bool calling;
 } user_tick_function_entry;
 
-#if HAVE_PUTENV
+#ifdef HAVE_PUTENV
 typedef struct {
 	char *putenv_string;
 	char *previous_value;

ext/standard/file.c

@@ -48,7 +48,7 @@
 # ifdef HAVE_SYS_PARAM_H
 #  include <sys/param.h>
 # endif
-# if HAVE_SYS_SELECT_H
+# ifdef HAVE_SYS_SELECT_H
 #  include <sys/select.h>
 # endif
 # include <sys/socket.h>

ext/standard/proc_open.c

@@ -232,7 +232,7 @@ static void _php_free_envp(php_process_env env)
 }
 /* }}} */
 
-#if HAVE_SYS_WAIT_H
+#ifdef HAVE_SYS_WAIT_H
 static pid_t waitpid_cached(php_process_handle *proc, int *wait_status, int options)
 {
 	if (proc->has_cached_exit_wait_status) {
@@ -544,7 +544,7 @@ static bool is_special_character_present(const zend_string *arg)
 	return false;
 }
 
-/* See https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments and 
+/* See https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments and
  * https://learn.microsoft.com/en-us/archive/blogs/twistylittlepassagesallalike/everyone-quotes-command-line-arguments-the-wrong-way */
 static void append_win_escaped_arg(smart_str *str, zend_string *arg, bool is_cmd_argument)
 {
@@ -1352,7 +1352,7 @@ PHP_FUNCTION(proc_open)
 		php_error_docref(NULL, E_WARNING, "posix_spawn() failed: %s", strerror(r));
 		goto exit_fail;
 	}
-#elif HAVE_FORK
+#elif defined(HAVE_FORK)
 	/* the Unix way */
 	child = fork();
 
@@ -1414,7 +1414,7 @@ PHP_FUNCTION(proc_open)
 	proc->childHandle = childHandle;
 #endif
 	proc->env = env;
-#if HAVE_SYS_WAIT_H
+#ifdef HAVE_SYS_WAIT_H
 	proc->has_cached_exit_wait_status = false;
 #endif
 

ext/standard/proc_open.h

@@ -43,7 +43,7 @@ typedef struct _php_process_handle {
 	zend_resource **pipes;
 	zend_string *command;
 	php_process_env env;
-#if HAVE_SYS_WAIT_H
+#ifdef HAVE_SYS_WAIT_H
 	/* We can only request the status once before it becomes unavailable.
 	 * Cache the result so we can request it multiple times. */
 	int cached_exit_wait_status_value;

sapi/cgi/cgi_main.c

@@ -595,23 +595,23 @@ static char *sapi_fcgi_getenv(const char *name, size_t name_len)
 
 static char *_sapi_cgi_putenv(char *name, size_t name_len, char *value)
 {
-#if !HAVE_SETENV || !HAVE_UNSETENV
+#if !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV)
 	size_t len;
 	char *buf;
 #endif
 
-#if HAVE_SETENV
+#ifdef HAVE_SETENV
 	if (value) {
 		setenv(name, value, 1);
 	}
 #endif
-#if HAVE_UNSETENV
+#ifdef HAVE_UNSETENV
 	if (!value) {
 		unsetenv(name);
 	}
 #endif
 
-#if !HAVE_SETENV || !HAVE_UNSETENV
+#if !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV)
 	/*  if cgi, or fastcgi and not found in fcgi env
 		check the regular environment
 		this leaks, but it's only cgi anyway, we'll fix
@@ -623,13 +623,13 @@ static char *_sapi_cgi_putenv(char *name, size_t name_len, char *value)
 		return getenv(name);
 	}
 #endif
-#if !HAVE_SETENV
+#if !defined(HAVE_SETENV)
 	if (value) {
 		len = slprintf(buf, len - 1, "%s=%s", name, value);
 		putenv(buf);
 	}
 #endif
-#if !HAVE_UNSETENV
+#if !defined(HAVE_UNSETENV)
 	if (!value) {
 		len = slprintf(buf, len - 1, "%s=", name);
 		putenv(buf);

sapi/cli/php_cli_server.c

@@ -110,7 +110,7 @@
 #define OUTPUT_IS_TTY 1
 #define OUTPUT_NOT_TTY 0
 
-#if HAVE_FORK
+#ifdef HAVE_FORK
 # include <sys/wait.h>
 static pid_t	 php_cli_server_master;
 static pid_t	*php_cli_server_workers;
@@ -2362,7 +2362,7 @@ static void php_cli_server_dtor(php_cli_server *server) /* {{{ */
 	if (server->router) {
 		pefree(server->router, 1);
 	}
-#if HAVE_FORK
+#ifdef HAVE_FORK
 	if (php_cli_server_workers_max > 1 &&
 		php_cli_server_workers &&
 		getpid() == php_cli_server_master) {
@@ -2484,7 +2484,7 @@ static void php_cli_server_startup_workers(void) {
 		return;
 	}
 
-#if HAVE_FORK
+#ifdef HAVE_FORK
 	php_cli_server_workers_max = ZEND_ATOL(workers);
 	if (php_cli_server_workers_max > 1) {
 		zend_long php_cli_server_worker;

sapi/litespeed/lsapilib.h

@@ -418,7 +418,7 @@ int LSAPI_Postfork_Parent(LSAPI_Request * pReq);
 #define LSAPI_LOG_PID            (0x10000)
 
 void LSAPI_Log(int flag, const char * fmt, ...)
-#if __GNUC__
+#ifdef __GNUC__
         __attribute__((format(printf, 2, 3)))
 #endif
 ;

scripts/phpize.m4

@@ -100,7 +100,7 @@ old_CPPFLAGS=$CPPFLAGS
 CPPFLAGS="-I$phpincludedir"
 AC_EGREP_CPP(php_zts_is_enabled,[
 #include <main/php_config.h>
-#if ZTS
+#ifdef ZTS
 php_zts_is_enabled
 #endif
 ],[

win32/signal.c

@@ -97,7 +97,7 @@ PHP_FUNCTION(sapi_windows_set_ctrl_handler)
 		RETURN_THROWS();
 	}
 
-#if ZTS
+#ifdef ZTS
 	if (!tsrm_is_main_thread()) {
 		zend_throw_error(NULL, "CTRL events can only be received on the main thread");
 		RETURN_THROWS();