Github #712: Use static libraries not object libraries for support library

 * .o files were being installed by cmake.

Change-Id: Ie2056e09b4800fe208d784a90f3908d508b8cadf
Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc4207b..51c4cf2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+# Copyright © 2018-2022 Arm Ltd and Contributors. All rights reserved.
 # Copyright 2020 NXP
 # SPDX-License-Identifier: MIT
 #
@@ -109,7 +109,6 @@
     src/armnnUtils/Transpose.cpp
     )
 
-add_library(armnnUtilsObj OBJECT ${armnnUtils_sources})
 add_library_ex(armnnUtils STATIC ${armnnUtils_sources})
 
 target_include_directories(armnnUtils PRIVATE src/backends)
@@ -839,7 +838,7 @@
         list(APPEND unittest_sources $<TARGET_OBJECTS:${lib}>)
     endforeach()
 
-    add_executable(UnitTests ${unittest_sources}  $<TARGET_OBJECTS:armnnUtilsObj>)
+    add_executable(UnitTests ${unittest_sources})
     target_include_directories(UnitTests PRIVATE src/armnn)
     target_include_directories(UnitTests PRIVATE src/armnnUtils)
     target_include_directories(UnitTests PRIVATE src/armnnTestUtils)
@@ -1004,14 +1003,6 @@
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
 )
 
-install(
-   TARGETS armnnUtilsObj
-   EXPORT  armnn-targets
-   LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-   OBJECTS DESTINATION ${CMAKE_INSTALL_LIBDIR}
-)
-
 ####################################################
 ## Set export alias
 set_target_properties(armnn