Fix exported OpenBLASTargets.cmake

When both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS are enabled,
cmake export both of them to OpenBLASTargets under tha same name `OpenBLAS::OpenBLAS`
which leads to fatal error about OpenBLAS::OpenBLAS being both static and shared target.
This change makes cmake export only the shared library in that case.
There is another solution to treat them as components,
but I am afraid that will make it backward incompatible.

CMakeLists.txt

@@ -386,11 +386,22 @@ endif()
 # Install project
 
 # Install libraries
-install(TARGETS ${OpenBLAS_LIBS}
-  EXPORT "OpenBLAS${SUFFIX64}Targets"
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
+if(BUILD_SHARED_LIBS AND BUILD_STATIC_LIBS)
+  install(TARGETS ${OpenBLAS_LIBNAME}_shared
+    EXPORT "OpenBLAS${SUFFIX64}Targets"
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
+  install(TARGETS ${OpenBLAS_LIBNAME}_static
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
+else()
+  install(TARGETS ${OpenBLAS_LIBS}
+    EXPORT "OpenBLAS${SUFFIX64}Targets"
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
+endif()
 
 # Install headers
 set(CMAKE_INSTALL_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR}/openblas${SUFFIX64})