Add minimal version info header to help compiler cache

xrt/detail/abi.h includes autogenerated version.h that contains timestamp
but use only major/minor version macros. Using smaller header enables
use of compiler caches (like ccache).

Signed-off-by: Pavel Shramov <[email protected]>

Author: shramov

src/CMake/config/version-slim.h.in

@@ -0,0 +1,13 @@
+#ifndef _XRT_VERSION_SLIM_H_
+#define _XRT_VERSION_SLIM_H_
+
+/*
+ * This header contains minimal version info needed for xrt/detail/abi.h header
+ */
+
+#define XRT_SLIM_VERSION(major, minor) ((major << 16) + (minor))
+#define XRT_SLIM_VERSION_CODE XRT_SLIM_VERSION(@XRT_VERSION_MAJOR@, @XRT_VERSION_MINOR@)
+#define XRT_SLIM_MAJOR(code) ((code >> 16))
+#define XRT_SLIM_MINOR(code) (code - ((code >> 16) << 16))
+
+#endif

src/CMake/version.cmake

@@ -88,13 +88,18 @@ configure_file(
   ${PROJECT_BINARY_DIR}/gen/version.h
 )
 
+configure_file(
+  ${XRT_SOURCE_DIR}/CMake/config/version-slim.h.in
+  ${PROJECT_BINARY_DIR}/gen/xrt/detail/version-slim.h
+)
+
 configure_file(
   ${XRT_SOURCE_DIR}/CMake/config/version.json.in
   ${PROJECT_BINARY_DIR}/gen/version.json
 )
 
 # xrt component install
-install(FILES ${PROJECT_BINARY_DIR}/gen/version.h
+install(FILES ${PROJECT_BINARY_DIR}/gen/version.h ${PROJECT_BINARY_DIR}/gen/xrt/detail/version-slim.h
   DESTINATION ${XRT_INSTALL_INCLUDE_DIR}/xrt/detail
   COMPONENT ${XRT_BASE_DEV_COMPONENT})
 

src/runtime_src/core/include/xrt/detail/abi.h

@@ -4,12 +4,9 @@
 #ifndef XRT_DETAIL_ABI_H
 #define XRT_DETAIL_ABI_H
 
-// Generated version.h file is installed into include/xrt/detail/version.h
-// but at build time it is picked up from compile include search path
-#if defined(XRT_BUILD) && !defined(DISABLE_ABI_CHECK)
-# include "version.h"
-#elif !defined(XRT_BUILD)
-# include "xrt/detail/version.h"
+// Use slim version header without datetime fields
+#ifndef DISABLE_ABI_CHECK
+# include "xrt/detail/version-slim.h"
 #endif
 
 #ifdef __cplusplus
@@ -27,9 +24,9 @@ namespace xrt { namespace detail {
 // version of XRT and new version.
 struct abi {
 #ifndef DISABLE_ABI_CHECK
-  const unsigned int major {XRT_MAJOR(XRT_VERSION_CODE)};
-  const unsigned int minor {XRT_MINOR(XRT_VERSION_CODE)};
-  const unsigned int code  {XRT_VERSION_CODE};
+  const unsigned int major {XRT_SLIM_MAJOR(XRT_SLIM_VERSION_CODE)};
+  const unsigned int minor {XRT_SLIM_MINOR(XRT_SLIM_VERSION_CODE)};
+  const unsigned int code  {XRT_SLIM_VERSION_CODE};
 #else
   const unsigned int major {0};
   const unsigned int minor {0};