Rework symbol visibility for easier maintenance

  Save in a few special cases, _X_EXPORT should not be used in C source
files. Instead, it should be used in headers, and the proper C source
include that header. Some special cases are symbols that need to be
shared between modules, but not expected to be used by external drivers,
and symbols that are accessible via LoaderSymbol/dlopen.

  This patch also adds conditionally some new sdk header files, depending
on extensions enabled. These files were added to match pattern for
other extensions/modules, that is, have the headers "deciding" symbol
visibility in the sdk. These headers are:
o Xext/panoramiXsrv.h, Xext/panoramiX.h
o fbpict.h (unconditionally)
o vidmodeproc.h
o mioverlay.h (unconditionally, used only by xaa)
o xfixes.h (unconditionally, symbols required by dri2)

  LoaderSymbol and similar functions now don't have different prototypes,
in loaderProcs.h and xf86Module.h, so that both headers can be included,
without the need of defining IN_LOADER.

  xf86NewInputDevice() device prototype readded to xf86Xinput.h, but
not exported (and with a comment about it).

1 files changed, 19 insertions, 19 deletions

diff --git a/Xext/panoramiXsrv.h b/Xext/panoramiXsrv.h
index d5c3d9827..c77b11927 100644
--- a/Xext/panoramiXsrv.h
+++ b/Xext/panoramiXsrv.h
@@ -8,27 +8,27 @@
 
 #include "panoramiX.h"
 
-extern int PanoramiXNumScreens;
-extern PanoramiXData *panoramiXdataPtr;
-extern int PanoramiXPixWidth;
-extern int PanoramiXPixHeight;
+extern _X_EXPORT int PanoramiXNumScreens;
+extern _X_EXPORT PanoramiXData *panoramiXdataPtr;
+extern _X_EXPORT int PanoramiXPixWidth;
+extern _X_EXPORT int PanoramiXPixHeight;
 
-extern VisualID PanoramiXTranslateVisualID(int screen, VisualID orig);
-extern void PanoramiXConsolidate(void);
-extern Bool PanoramiXCreateConnectionBlock(void);
-extern PanoramiXRes * PanoramiXFindIDByScrnum(RESTYPE, XID, int);
-extern Bool XineramaRegisterConnectionBlockCallback(void (*func)(void));
-extern int XineramaDeleteResource(pointer, XID);
+extern _X_EXPORT VisualID PanoramiXTranslateVisualID(int screen, VisualID orig);
+extern _X_EXPORT void PanoramiXConsolidate(void);
+extern _X_EXPORT Bool PanoramiXCreateConnectionBlock(void);
+extern _X_EXPORT PanoramiXRes * PanoramiXFindIDByScrnum(RESTYPE, XID, int);
+extern _X_EXPORT Bool XineramaRegisterConnectionBlockCallback(void (*func)(void));
+extern _X_EXPORT int XineramaDeleteResource(pointer, XID);
 
-extern void XineramaReinitData(ScreenPtr);
+extern _X_EXPORT void XineramaReinitData(ScreenPtr);
 
-extern RegionRec XineramaScreenRegions[MAXSCREENS];
+extern _X_EXPORT RegionRec XineramaScreenRegions[MAXSCREENS];
 
-extern unsigned long XRC_DRAWABLE;
-extern unsigned long XRT_WINDOW;
-extern unsigned long XRT_PIXMAP;
-extern unsigned long XRT_GC;
-extern unsigned long XRT_COLORMAP;
+extern _X_EXPORT unsigned long XRC_DRAWABLE;
+extern _X_EXPORT unsigned long XRT_WINDOW;
+extern _X_EXPORT unsigned long XRT_PIXMAP;
+extern _X_EXPORT unsigned long XRT_GC;
+extern _X_EXPORT unsigned long XRT_COLORMAP;
 
 /*
  * Drivers are allowed to wrap this function.  Each wrapper can decide that the
@@ -38,9 +38,9 @@ extern unsigned long XRT_COLORMAP;
  * screen 0.
  */
 typedef Bool (*XineramaVisualsEqualProcPtr)(VisualPtr, ScreenPtr, VisualPtr);
-extern XineramaVisualsEqualProcPtr XineramaVisualsEqualPtr;
+extern _X_EXPORT XineramaVisualsEqualProcPtr XineramaVisualsEqualPtr;
 
-extern void XineramaGetImageData(
+extern _X_EXPORT void XineramaGetImageData(
     DrawablePtr *pDrawables,
     int left,
     int top,