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, 8 insertions, 8 deletions

diff --git a/include/registry.h b/include/registry.h
index 29e5fdfd3..325f76515 100644
--- a/include/registry.h
+++ b/include/registry.h
@@ -28,22 +28,22 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  * Registration functions.  The name string is not copied, so it must
  * not be a stack variable.
  */
-void RegisterResourceName(RESTYPE type, char *name);
-void RegisterExtensionNames(ExtensionEntry *ext);
+extern _X_EXPORT void RegisterResourceName(RESTYPE type, char *name);
+extern _X_EXPORT void RegisterExtensionNames(ExtensionEntry *ext);
 
 /*
  * Lookup functions.  The returned string must not be modified or freed.
  */
-const char *LookupMajorName(int major);
-const char *LookupRequestName(int major, int minor);
-const char *LookupEventName(int event);
-const char *LookupErrorName(int error);
-const char *LookupResourceName(RESTYPE rtype);
+extern _X_EXPORT const char *LookupMajorName(int major);
+extern _X_EXPORT const char *LookupRequestName(int major, int minor);
+extern _X_EXPORT const char *LookupEventName(int event);
+extern _X_EXPORT const char *LookupErrorName(int error);
+extern _X_EXPORT const char *LookupResourceName(RESTYPE rtype);
 
 /*
  * Setup and teardown
  */
-void dixResetRegistry(void);
+extern _X_EXPORT void dixResetRegistry(void);
 
 #else /* XREGISTRY */