Commit 1063690174cbd6752a280e0881016ccd0134b466
2017-12-27T08:11:14
Provide support for intra-module callback functions. This is needed especially for `make multi' with C++. * include/freetype/config/ftconfig.h (FT_BASE_CALLBACK, FT_BASE_CALLBACK_DEF): New macros.
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diff --git a/ChangeLog b/ChangeLog
index f644b53..f9a4693 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2017-12-27 Werner Lemberg <wl@gnu.org>
+
+ Provide support for intra-module callback functions.
+
+ This is needed especially for `make multi' with C++.
+
+ * include/freetype/config/ftconfig.h (FT_BASE_CALLBACK,
+ FT_BASE_CALLBACK_DEF): New macros.
+
2017-12-25 Ewald Hew <ewaldhew@gmail.com>
Move PostScript drivers' property handlers to `base'.
diff --git a/include/freetype/config/ftconfig.h b/include/freetype/config/ftconfig.h
index 6967b5f..4a444ba 100644
--- a/include/freetype/config/ftconfig.h
+++ b/include/freetype/config/ftconfig.h
@@ -365,6 +365,14 @@ FT_BEGIN_HEADER
#endif
+ /* Use FT_LOCAL and FT_LOCAL_DEF to declare and define, respectively, */
+ /* a function that gets used only within the scope of a module. */
+ /* Normally, both the header and source code files for such a */
+ /* function are within a single module directory. */
+ /* */
+ /* Intra-module arrays should be tagged with FT_LOCAL_ARRAY and */
+ /* FT_LOCAL_ARRAY_DEF. */
+ /* */
#ifdef FT_MAKE_OPTION_SINGLE_OBJECT
#define FT_LOCAL( x ) static x
@@ -386,6 +394,12 @@ FT_BEGIN_HEADER
#define FT_LOCAL_ARRAY_DEF( x ) const x
+ /* Use FT_BASE and FT_BASE_DEF to declare and define, respectively, */
+ /* functions that are used in more than a single module. In the */
+ /* current setup this implies that the declaration is in a header */
+ /* file in the `include/freetype/internal' directory, and the */
+ /* function body is in a file in `src/base'. */
+ /* */
#ifndef FT_BASE
#ifdef __cplusplus
@@ -437,6 +451,8 @@ FT_BEGIN_HEADER
/* You can provide your own implementation of FT_EXPORT and */
/* FT_EXPORT_DEF here if you want. */
/* */
+ /* To export a variable, use FT_EXPORT_VAR. */
+ /* */
#ifndef FT_EXPORT
#if defined( _DLL )
@@ -473,6 +489,7 @@ FT_BEGIN_HEADER
#endif /* !FT_EXPORT_VAR */
+
/* The following macros are needed to compile the library with a */
/* C++ compiler and with 16bit compilers. */
/* */
@@ -484,7 +501,13 @@ FT_BEGIN_HEADER
/* functions which are accessed by (global) function pointers. */
/* */
/* */
- /* FT_CALLBACK_DEF is used to _define_ a callback function. */
+ /* FT_CALLBACK_DEF is used to _define_ a callback function, */
+ /* located in the same source code file as the structure that uses */
+ /* it. */
+ /* */
+ /* FT_BASE_CALLBACK and FT_BASE_CALLBACK_DEF are used to declare */
+ /* and define a callback function, respectively, in a similar way */
+ /* as FT_BASE and FT_BASE_DEF work. */
/* */
/* FT_CALLBACK_TABLE is used to _declare_ a constant variable that */
/* contains pointers to callback functions. */
@@ -504,6 +527,16 @@ FT_BEGIN_HEADER
#endif
#endif /* FT_CALLBACK_DEF */
+#ifndef FT_BASE_CALLBACK
+#ifdef __cplusplus
+#define FT_BASE_CALLBACK( x ) extern "C" x
+#define FT_BASE_CALLBACK_DEF( x ) extern "C" x
+#else
+#define FT_BASE_CALLBACK( x ) extern x
+#define FT_BASE_CALLBACK_DEF( x ) x
+#endif
+#endif /* FT_BASE_CALLBACK */
+
#ifndef FT_CALLBACK_TABLE
#ifdef __cplusplus
#define FT_CALLBACK_TABLE extern "C"