CMake: at least one of BUILD_STATIC or BUILD_SHARED must be ON

Signed-off-by: Roman Ondráček <mail@romanondracek.cz>

CMakeLists.txt

@@ -41,6 +41,10 @@ option(BUILD_STATIC "Build static library" OFF)
 option(BUILD_SHARED "Build shared library" ON)
 option(CODE_COVERAGE "Enable coverage reporting" OFF)
 
+if (NOT BUILD_STATIC AND NOT BUILD_SHARED)
+    message(FATAL_ERROR "At least one of BUILD_STATIC or BUILD_SHARED must be ON")
+endif()
+
 if (BUILD_TESTS)
     add_compile_definitions(BUILD_TESTS=1)
 else ()

README.md

 # libiqrf
 
 [![Build Status](https://gitlab.iqrf.org/open-source/iqrf-sdk/libiqrf/badges/master/pipeline.svg)](https://gitlab.iqrf.org/open-source/iqrf-sdk/libiqrf/pipelines)
-[![Apache License](https://img.shields.io/badge/license-APACHE2-blue.svg)](LICENSE)
+[![Apache License](https://img.shields.io/badge/license-APACHE2-blue.svg)](LICENCE)
 
 ## Description