Add defines to allow getting the QDLDL version in consuming software

These defines allow software that use QDLDL to get its version inside
the code.

CMakeLists.txt

@@ -82,6 +82,10 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/configure/qdldl_types.h.in
                ${CMAKE_CURRENT_SOURCE_DIR}/include/qdldl_types.h
                NEWLINE_STYLE LF)
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/configure/qdldl_version.h.in
+               ${CMAKE_CURRENT_SOURCE_DIR}/include/qdldl_version.h
+               NEWLINE_STYLE LF)
+
 
 # Set sources
 # ----------------------------------------------
@@ -94,6 +98,7 @@ set(
 	qdldl_headers
 	include/qdldl.h
 	include/qdldl_types.h
+	include/qdldl_version.h
 	)
 
 # Create object library

configure/qdldl_version.h.in

+#ifndef QDLDL_VERSION_H_
+#define QDLDL_VERSION_H_
+
+#define QDLDL_VERSION_MAJOR     @QDLDL_VERSION_MAJOR@
+#define QDLDL_VERSION_MINOR     @QDLDL_VERSION_MINOR@
+#define QDLDL_VERSION_PATCH     @QDLDL_VERSION_PATCH@
+
+#endif // #ifndef QDLDL_VERSION_H_

include/.gitignore

 qdldl_types.h
+qdldl_version.h

include/qdldl.h

@@ -3,6 +3,7 @@
 
 // Include qdldl type options
 #include "qdldl_types.h"
+#include "qdldl_version.h"
 
 # ifdef __cplusplus
 extern "C" {