fix startup on windows

Binding printf() won't work on windows. We should find a better way to
test if ffi is enabled.

Thanks West14.

See #183

Author: jcupitt

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to `:vips` will be documented in this file.
 
+## master
+
+- fix startup on windows [West14]
+
 ## 2.1.1 - 2022-11-13
 
 - remove unused vips_error_buffer_copy() declaration to fix compatibility with

examples/addconst.php

@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 
 use Jcupitt\Vips;
 

examples/bench.php

@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 
 use Jcupitt\Vips;
 

examples/class.php

@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 
 use Jcupitt\Vips;
 

examples/sig.php

@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 
 use Jcupitt\Vips;
 

examples/vips-magick.php

@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-require __DIR__ . '/../vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 
 use Jcupitt\Vips;
 

src/FFI.php

@@ -204,9 +204,15 @@ private static function init(): void
         // try experimentally binding a bit of stdio ... if this fails, FFI
         // has probably not been installed or enabled, and php will throw a
         // useful error message
-        $stdio = \FFI::cdef(<<<EOS
-            int printf(const char *, ...);
-        EOS);
+        //
+        // this won't work on windows since there's no run time linker
+        //
+        // FIXME ... find a better way to test if FFI has been enabled 
+        if (PHP_OS_FAMILY !== "Windows") {
+            $stdio = \FFI::cdef(<<<EOS
+                int printf(const char *, ...);
+            EOS);
+        }
 
         $vips_libname = self::libraryName("libvips", 42);
         if (PHP_OS_FAMILY === "Windows") {