cmake: enforce compatibility as subproject

Author: jcarpent

CMakeLists.txt

@@ -4,6 +4,10 @@
 
 cmake_minimum_required(VERSION 3.10)
 
+if(DEFINED PROJECT_NAME)
+  set(PROXSUITE_AS_SUBPROJECT)
+endif()
+
 set(PROJECT_NAME proxsuite)
 set(PROJECT_DESCRIPTION "The Advanced Proximal Optimization Toolbox")
 set(PROJECT_URL "http://github.com/Simple-Robotics/proxsuite")
@@ -135,15 +139,17 @@ if(BUILD_WITH_VECTORIZATION_SUPPORT)
   list(APPEND EXPORTED_TARGETS_LIST proxsuite-vectorized)
 endif()
 
-install(
-  TARGETS ${EXPORTED_TARGETS_LIST}
-  EXPORT ${TARGETS_EXPORT_NAME}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_FULL_BINDIR})
+if(NOT PROXSUITE_AS_SUBPROJECT)
+  install(
+    TARGETS ${EXPORTED_TARGETS_LIST}
+    EXPORT ${TARGETS_EXPORT_NAME}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_FULL_BINDIR})
+endif(NOT PROXSUITE_AS_SUBPROJECT)
 
 add_subdirectory(bindings)
-if(BUILD_TESTING)
+if(BUILD_TESTING AND NOT PROXSUITE_AS_SUBPROJECT)
   add_subdirectory(test)
   add_subdirectory(examples)
 endif()