37 lines
1.4 KiB
CMake
37 lines
1.4 KiB
CMake
|
add_executable(zion
|
||
|
|
zion.cpp)
|
||
|
|
|
||
|
|
# -c -- Don't run the linker.
|
||
|
|
# -nostdlib -- Don't include the standard library.
|
||
|
|
# -mabi=sysv -- Explicitly specify the ABI since we will rely on it.
|
||
|
|
# -mno-red-zone -- Don't put data below the stack pointer (clobbered by interrupts).
|
||
|
|
# -mcmodel=kernel -- Assume the kernel code is running in the higher half.
|
||
|
|
# -mgeneral-regs-only -- Prevent GCC from using a whole host of nonsense registers (that we have to enable).
|
||
|
|
# Hopefully preceded by -mgeneral-regs-only
|
||
|
|
# -mno-80387
|
||
|
|
# -mno-mmx
|
||
|
|
# -mno-3dnow
|
||
|
|
# -mno-sse -mno-sse2
|
||
|
|
# -MMD -- Something with the preprocessor?
|
||
|
|
set(_Z_COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -ffreestanding -nostdlib -mabi=sysv -mno-red-zone -mcmodel=kernel -mgeneral-regs-only")
|
||
|
|
# -mno-80387 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -MMD
|
||
|
|
|
||
|
|
set(_Z_LINK_SCRIPT "${CMAKE_CURRENT_SOURCE_DIR}/linker.ld")
|
||
|
|
|
||
|
|
# -lgcc -- Link against gcc internals. Not sure if necessary.
|
||
|
|
# -nostdlib -- Don't try to link against the stdlib.
|
||
|
|
# -nostartfiles -- Don't try to link against crt0.s
|
||
|
|
# -static -- Prevent trying something with shared libraries (probably irrelevant).
|
||
|
|
# -z max-page-size=0x1000 -- Assume 4 KiB Pages.
|
||
|
|
set(_Z_LINK_FLAGS "-T ${_Z_LINK_SCRIPT} -lgcc -nostdlib -nostartfiles -static -z max-page-size=0x1000")
|
||
|
|
|
||
|
|
|
||
|
|
# Don't try to dynamically link.
|
||
|
|
set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
|
||
|
|
|
||
|
|
set_target_properties(zion
|
||
|
|
PROPERTIES
|
||
|
|
COMPILE_FLAGS "${_Z_COMPILE_FLAGS}"
|
||
|
|
LINK_FLAGS "${_Z_LINK_FLAGS}"
|
||
|
|
)
|