make compilation better

cmake/platform_Linux.cmake

@@ -0,0 +1,23 @@
+add_executable(p-rad
+    src/main.cpp
+    ${CORE_SOURCES}
+    ${HAL_SOURCES}
+)
+target_compile_options(p-rad PRIVATE -ffunction-sections -fdata-sections)
+target_link_options(p-rad PRIVATE -Wl,--gc-sections)
+if(CMAKE_BUILD_TYPE EQUAL Release)
+add_compile_options(-O3)
+endif()
+
+target_include_directories(p-rad PRIVATE src)
+
+find_package(Threads REQUIRED)
+find_package(SDL3 REQUIRED CONFIG)
+find_package(CURL REQUIRED)
+
+target_link_libraries(p-rad
+    Threads::Threads
+    SDL3::SDL3
+    CURL::libcurl
+    GeographicLib
+)