Use predefined resource compiler macro.

include/libssh2.h

@@ -82,7 +82,7 @@
  */
 #define LIBSSH2_TIMESTAMP "DEV"
 
-#ifndef LIBSSH2_VERSION_ONLY
+#ifndef RC_INVOKED
 
 #ifdef __cplusplus
 extern "C" {
@@ -1166,6 +1166,6 @@ LIBSSH2_API int libssh2_trace_sethandler(LIBSSH2_SESSION *session,
 } /* extern "C" */
 #endif
 
-#endif /* LIBSSH2_VERSION_ONLY */
+#endif /* !RC_INVOKED */
 
 #endif /* LIBSSH2_H */

win32/GNUmakefile

@@ -120,7 +120,7 @@ LIBEXT	= a
 RANLIB	= $(CROSSPREFIX)ranlib
 #LDLIBS	+= -lwsock32
 LDLIBS	+= -lws2_32
-RCFLAGS	= -DLIBSSH2_VERSION_ONLY -I. -I ../include -O coff -i
+RCFLAGS	= -I. -I ../include -O coff -i
 CFLAGS	+= -fno-strict-aliasing
 CFLAGS	+= -Wall # -pedantic
 endif

win32/Makefile.Watcom

@@ -140,7 +140,7 @@ $(LIBNAME).lib: $(OBJS_STAT) $(LIB_ARG)
 
 .ERASE
 $(RESOURCE): libssh2.rc
-	$(RC) $(DEBUG) -q -r -zm -DLIBSSH2_VERSION_ONLY -I..\include $(SYS_INCL) $[@ -fo=$^@
+	$(RC) $(DEBUG) -q -r -zm -I..\include $(SYS_INCL) $[@ -fo=$^@
 
 .ERASE
 .c{$(OBJ_BASE)\dyn}.obj: