fixed #23 add -Wall compiler option

config.m4

@@ -17,6 +17,7 @@ PHP_ARG_WITH(
 
 if test "$PHP_EXECDIR" != "no"; then
 	AC_DEFINE(HAVE_EXECDIR, 1, [ ])
+	CFLAGS="${CFLAGS} -Wall"
 
 	PHP_SUBST(LDFLAGS)
 	PHP_SUBST(CPPFLAGS)
@@ -35,5 +36,7 @@ if test "$PHP_EXECDIR" != "no"; then
 		AC_DEFINE([PHP_EXECDIR_COMPAT], [], [Support original system function with _orig suffix])
 	fi
 
-	PHP_NEW_EXTENSION(execdir, php_execdir.c execdirapi.c proc_open.c proc_open5.c proc_open53.c, $ext_shared)
+	sources="php_execdir.c execdirapi.c proc_open.c proc_open5.c proc_open53.c"
+
+	PHP_NEW_EXTENSION(execdir, $sources, $ext_shared,, \\$(CFALGS))
 fi

php_execdir.c

@@ -30,6 +30,7 @@
 #include "php_ini.h"
 #include "SAPI.h"
 #include "ext/standard/exec.h"
+#include "ext/standard/info.h"
 
 #include "php_execdir.h"
 
@@ -201,7 +202,6 @@ static int safe_hook_execdir (void) {
 	int    entno = sizeof (execdir_list) / sizeof (char *);
 	int    i, funclen;
 	char * func;
-	zend_function * zf;
 	TSRMLS_FETCH ();
 
 	for ( i=0; i<entno; i++ ) {
@@ -356,6 +356,8 @@ PHP_MINIT_FUNCTION (execdir)
 	// On cli mode, jailed_shell_cmd does nothing to do.
 	//if ( strcmp (sapi_module.name, "cli") != 0 )
 	safe_hook_execdir ();
+
+	return SUCCESS;
 }
 /* }}} */
 
@@ -434,9 +436,9 @@ PHP_FUNCTION (passthru_re)
 PHP_FUNCTION (shell_exec_re)
 {
 	FILE        * in;
-	size_t        total_readbytes;
 	char        * command, * jcommand;
 #if PHP_VERSION_ID < 60000
+	size_t        total_readbytes;
 	int           command_len;
 	char        * ret;
 #else