[build] Move mac support code to `mac-support.h'.

* builds/unix/ftconfig.h.in, builds/vms/ftconfig.h,
include/freetype/config/ftconfig.h: Split off mac-specific stuff
to...
* include/freetype/config/mac-support.h: ...this new file.

* CMakeLists.txt, builds/unix/configure.raw: Remove `/undef ->
#undef' string replacement; the affected code is no longer part of
the `ftconfig.h' template.

2 files changed, 50 insertions, 30 deletions

diff --git a/include/freetype/config/ftconfig.h b/include/freetype/config/ftconfig.h
index 72fbf360e..40d9078cf 100644
--- a/include/freetype/config/ftconfig.h
+++ b/include/freetype/config/ftconfig.h
@@ -42,6 +42,7 @@
 #include FT_CONFIG_STANDARD_LIBRARY_H
 
 #include <freetype/config/integer-types.h>
+#include <freetype/config/mac-support.h>
 
 FT_BEGIN_HEADER
 
@@ -63,36 +64,6 @@ FT_BEGIN_HEADER
    */
 
 
-  /**************************************************************************
-   *
-   * Mac support
-   *
-   *   This is the only necessary change, so it is defined here instead
-   *   providing a new configuration file.
-   */
-#if defined( __APPLE__ ) || ( defined( __MWERKS__ ) && defined( macintosh ) )
-  /* No Carbon frameworks for 64bit 10.4.x.                         */
-  /* `AvailabilityMacros.h` is available since Mac OS X 10.2,       */
-  /* so guess the system version by maximum errno before inclusion. */
-#include <errno.h>
-#ifdef ECANCELED /* defined since 10.2 */
-#include "AvailabilityMacros.h"
-#endif
-#if defined( __LP64__ ) && \
-    ( MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4 )
-#undef FT_MACINTOSH
-#endif
-
-#elif defined( __SC__ ) || defined( __MRC__ )
-  /* Classic MacOS compilers */
-#include "ConditionalMacros.h"
-#if TARGET_OS_MAC
-#define FT_MACINTOSH 1
-#endif
-
-#endif
-
-
   /* Fix compiler warning with sgi compiler. */
 #if defined( __sgi ) && !defined( __GNUC__ )
 #if defined( _COMPILER_VERSION ) && ( _COMPILER_VERSION >= 730 )
diff --git a/include/freetype/config/mac-support.h b/include/freetype/config/mac-support.h
new file mode 100644
index 000000000..94867088e
--- /dev/null
+++ b/include/freetype/config/mac-support.h
@@ -0,0 +1,49 @@
+/****************************************************************************
+ *
+ * config/mac-support.h
+ *
+ *   Mac/OS X support configuration header.
+ *
+ * Copyright (C) 1996-2020 by
+ * David Turner, Robert Wilhelm, and Werner Lemberg.
+ *
+ * This file is part of the FreeType project, and may only be used,
+ * modified, and distributed under the terms of the FreeType project
+ * license, LICENSE.TXT.  By continuing to use, modify, or distribute
+ * this file you indicate that you have read the license and
+ * understand and accept it fully.
+ *
+ */
+#ifndef FREETYPE_CONFIG_MAC_SUPPORT_H_
+#define FREETYPE_CONFIG_MAC_SUPPORT_H_
+
+  /**************************************************************************
+   *
+   * Mac support
+   *
+   *   This is the only necessary change, so it is defined here instead
+   *   providing a new configuration file.
+   */
+#if defined( __APPLE__ ) || ( defined( __MWERKS__ ) && defined( macintosh ) )
+  /* No Carbon frameworks for 64bit 10.4.x.                         */
+  /* `AvailabilityMacros.h` is available since Mac OS X 10.2,       */
+  /* so guess the system version by maximum errno before inclusion. */
+#include <errno.h>
+#ifdef ECANCELED /* defined since 10.2 */
+#include "AvailabilityMacros.h"
+#endif
+#if defined( __LP64__ ) && \
+    ( MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4 )
+#undef FT_MACINTOSH
+#endif
+
+#elif defined( __SC__ ) || defined( __MRC__ )
+  /* Classic MacOS compilers */
+#include "ConditionalMacros.h"
+#if TARGET_OS_MAC
+#define FT_MACINTOSH 1
+#endif
+
+#endif  /* Mac support */
+
+#endif  /* FREETYPE_CONFIG_MAC_SUPPORT_H_ */