set(CMAKE_CXX_FLAGS_RELEASE "-g -O2")
set(CMAKE_CXX_FLAGS_CCOV "-g -O2 --coverage")
-set(CMAKE_INSTALL_PREFIX "${CMAKE_SOURCE_DIR}/Install" CACHE PATH "The path where to install")
+# Env variable overload default
+if(DEFINED ENV{INSTALL_PREFIX})
+ set (INSTALL_PREFIX $ENV{INSTALL_PREFIX})
+else()
+ set(INSTALL_PREFIX "${CMAKE_SOURCE_DIR}/Install" CACHE PATH "The path where to install")
+endif()
+set(CMAKE_INSTALL_PREFIX ${INSTALL_PREFIX} CACHE STRING "Installation Prefix" FORCE)
# (BUG!!!) as PKG_CONFIG_PATH does not work [should be en env variable]
set(PKG_CONFIG_USE_CMAKE_PREFIX_PATH ON CACHE BOOLEAN "Flag for using prefix path")