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, 5 insertions, 5 deletions

diff --git a/mi/mispans.h b/mi/mispans.h
index 258b29279..e3f033bab 100644
--- a/mi/mispans.h
+++ b/mi/mispans.h
@@ -60,30 +60,30 @@ typedef struct {
 } SpanGroup;
 
 /* Initialize SpanGroup.  MUST BE DONE before use. */
-extern void miInitSpanGroup(
+extern _X_EXPORT void miInitSpanGroup(
     SpanGroup * /*spanGroup*/
 );
 
 /* Add a Spans to a SpanGroup. The spans MUST BE in y-sorted order */
-extern void miAppendSpans(
+extern _X_EXPORT void miAppendSpans(
     SpanGroup * /*spanGroup*/,
     SpanGroup * /*otherGroup*/,
     Spans * /*spans*/
 );
 
 /* Paint a span group, insuring that each pixel is painted at most once */
-extern void miFillUniqueSpanGroup(
+extern _X_EXPORT void miFillUniqueSpanGroup(
     DrawablePtr /*pDraw*/,
     GCPtr /*pGC*/,
     SpanGroup * /*spanGroup*/
 );
 
 /* Free up data in a span group.  MUST BE DONE or you'll suffer memory leaks */
-extern void miFreeSpanGroup(
+extern _X_EXPORT void miFreeSpanGroup(
     SpanGroup * /*spanGroup*/
 );
 
-extern int miClipSpans(
+extern _X_EXPORT int miClipSpans(
     RegionPtr /*prgnDst*/,
     DDXPointPtr /*ppt*/,
     int * /*pwidth*/,