# RPI4/5 arm64 toolchain
set(RPI True)

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR aarch64)
set(SCOL_INSTALL_PREFIX "RPI4")
set(PIFOUR "PIFOUR")

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Cross-compiler
set(CMAKE_C_COMPILER aarch64-linux-gnu-gcc)
set(CMAKE_CXX_COMPILER aarch64-linux-gnu-g++)
set(CMAKE_LINKER aarch64-linux-gnu-ld)
set(CMAKE_OBJCOPY aarch64-linux-gnu-objcopy)

set(CMAKE_FIND_ROOT_PATH /usr/aarch64-linux-gnu)
list(APPEND CMAKE_FIND_ROOT_PATH /usr/aarch64-linux-gnu/lib /usr/aarch64-linux-gnu/usr/lib /usr/lib/aarch64-linux-gnu /opt/vc/lib/)

# Tell pkg-config to look for libraries
set(ENV{PKG_CONFIG_PATH} "/usr/lib/aarch64-linux-gnu/pkgconfig")

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)

# Corrected C and C++ flags
#RPI 5 -mcpu=cortex-a72 -mtune=cortex-a72 
#RPI 4 -mcpu=cortex-a53 -mtune=cortex-a53
set(CMAKE_C_FLAGS "-pipe -march=armv8-a -mcpu=cortex-a72 -mtune=cortex-a72 -mabi=lp64 -funsafe-math-optimizations -fomit-frame-pointer -fsigned-char" CACHE STRING "Flags for Raspberry Pi 4/5")
set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "Flags for Raspberry Pi 3/4")
set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "C++ Release flags")
set(CMAKE_C_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "C Release flags")
set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "C++ Debug flags")
set(CMAKE_C_FLAGS_DEBUG "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "C Debug flags")

set(CMAKE_SKIP_RPATH 1)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--enable-new-dtags,-R,\\\$ORIGIN" CACHE STRING "Flags for executables")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--enable-new-dtags,-R,\\\$ORIGIN" CACHE STRING "Flags for shared libraries")
set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX} ${CMAKE_FIND_LIBRARY_SUFFIXES})

add_definitions(-DRPI -DRPI4 -fPIC)