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gint/CMakeLists.txt
Lephe b0c4e6fd2f
meta: build with -ffreestanding 
As of now (fxSDK 2.11), this flag is set globally by the fxSDK, so this
change doesn't have an immediate effect. However, I've been
experimenting with removing -ffreestanding at the global level to allow
applications to build with the hosted C++ library (which isn't fully
supported by has many supported features, like containers, that aren't
available in free-standing mode).

Without -ffreestanding, LTO makes weird decisions and ends up pruning
way too many symbols from libraries, leading to undefined references for
symbols provided by the standard library. Here is a minimal example.

---
% cat abort.c
void abort(void)
{
    __builtin_unreachable();
}
% cat main.c
extern void abort(void);
int start(void)
{
    abort();
    return 0;
}
% cat sh-min.x
ENTRY(_start)
OUTPUT_FORMAT(elf32-sh)
SECTIONS {
	. = 0x1000;
	.text : { *(.text) }
	.data : { *(.data) }
	.bss : { *(.bss) }
}
% sh-elf-gcc -flto -nostdlib -ffreestanding -c abort.c -o abort.o
% sh-elf-gcc-ar rcs abort.a abort.o
% sh-elf-gcc -flto -nostdlib -c main.c -o main.o
% sh-elf-gcc -flto -nostdlib -save-temps main.o -o main -T ./sh-min.x abort.a -lgcc
ld: ./main.ltrans0.ltrans.o: in function `_start':
<artificial>:(.text+0xc): undefined reference to `_abort'
---

To solve the bug in this example, add -ffreestanding when making main.o.

I haven't been able to sufficiently dump/introspect intermediate files
to understand what's happening yet. It's also unclear whether the fix is
clean since LTO normally requires all files to be built with the same
settings, so adding -ffreestanding to gint but not the add-in seems
suspicious. There is, however, an inherent incompatibility in the
conjunction of (1) building kernels with -ffreestanding, (2) building
add-ins that use the C++ library thus require -fhosted, and (3) only
linking objects files built with the same options.
2024-08-06 11:52:41 +02:00

333 lines
9.5 KiB
CMake
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# Build system for the gint unikernel
cmake_minimum_required(VERSION 3.15)
project(Gint VERSION 2.11.0 LANGUAGES C ASM)
include(GitVersionNumber)
include(Fxconv)
option(GINT_NO_OS_STACK "Do not use the OS stack as a memory pool (fx-CG only)")
option(GINT_STATIC_GRAY "Use static memory instead of malloc for gray buffers (fx-9860G only)")
option(GINT_KMALLOC_DEBUG "Enable debug functions for kmalloc")
option(GINT_USB_DEBUG "Enable debug functions for the USB driver")
set(CMAKE_INSTALL_MESSAGE LAZY)
# Generate <gint/config.h> with commit hash, version name and options
if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
git_version_number(SHORT_HASH "GINT_GIT_HASH" TAG_RELATIVE "GINT_GIT_VERSION")
else()
set(GINT_GIT_HASH "0000000")
set(GINT_GIT_VERSION "${PROJECT_VERSION}")
endif()
configure_file(include/gint/config.h.in include/gint/config.h)
set(SOURCES
# Clock Pulse Generator driver
src/cpg/cpg.c
src/cpg/overclock.c
# CPU driver
src/cpu/atomic.c
src/cpu/cpu.c
src/cpu/ics.s
src/cpu/registers.s
src/cpu/sleep.c
# Direct Memory Access driver
src/dma/dma.c
src/dma/inth.s
src/dma/memcpy.c
src/dma/memset.c
# Filesystem interface
src/fs/close.c
src/fs/closedir.c
src/fs/creat.c
src/fs/fdopendir.c
src/fs/fs.c
src/fs/lseek.c
src/fs/mkdir.c
src/fs/open.c
src/fs/opendir.c
src/fs/pread.c
src/fs/pwrite.c
src/fs/read.c
src/fs/readdir.c
src/fs/rename.c
src/fs/rewinddir.c
src/fs/rmdir.c
src/fs/seekdir.c
src/fs/stat.c
src/fs/telldir.c
src/fs/unlink.c
src/fs/write.c
# Filesystem interface to Fugue
src/fs/fugue/BFile_Ext_Stat.c
src/fs/fugue/fugue.c
src/fs/fugue/fugue_dir.c
src/fs/fugue/fugue_open.c
src/fs/fugue/fugue_mkdir.c
src/fs/fugue/fugue_stat.c
src/fs/fugue/fugue_rename.c
src/fs/fugue/fugue_rmdir.c
src/fs/fugue/fugue_unlink.c
src/fs/fugue/util.c
# GDB remote serial protocol
src/gdb/gdb.c
src/gdb/gdb.S
# Gray engine
src/gray/engine.c
src/gray/gclear.c
src/gray/ggetpixel.c
src/gray/gint_gline.c
src/gray/gpixel.c
src/gray/grect.c
src/gray/gsubimage.c
src/gray/gtext.c
# Image library
src/image/image_alloc.c
src/image/image_alloc_palette.c
src/image/image_alpha.c
src/image/image_clear.c
src/image/image_copy.c
src/image/image_copy_alloc.c
src/image/image_copy_palette.c
src/image/image_create.c
src/image/image_create_vram.c
src/image/image_data_size.c
src/image/image_decode_pixel.c
src/image/image_fill.c
src/image/image_free.c
src/image/image_get_pixel.c
src/image/image_hflip.c
src/image/image_hflip_alloc.c
src/image/image_linear.c
src/image/image_linear.S
src/image/image_linear_alloc.c
src/image/image_rotate.c
src/image/image_rotate_around.c
src/image/image_rotate_around_scale.c
src/image/image_scale.c
src/image/image_set_palette.c
src/image/image_set_pixel.c
src/image/image_sub.c
src/image/image_target.c
src/image/image_valid.c
src/image/image_vflip.c
src/image/image_vflip_alloc.c
# Interrupt Controller driver
src/intc/intc.c
src/intc/inth.s
# Kernel
src/kernel/exch.c
src/kernel/exch.s
src/kernel/hardware.c
src/kernel/inth.S
src/kernel/kernel.c
src/kernel/osmenu.c
src/kernel/start.c
src/kernel/start.S
src/kernel/syscall.c
src/kernel/syscalls.S
src/kernel/tlbh.S
src/kernel/world.c
# Key Scan Interface driver
src/keysc/getkey.c
src/keysc/iokbd.c
src/keysc/keycodes.c
src/keysc/keydev.c
src/keysc/keydev_idle.c
src/keysc/keydev_process_key.c
src/keysc/keydown_all.c
src/keysc/keydown_any.c
src/keysc/keysc.c
src/keysc/scan_frequency.c
# Memory allocator
src/kmalloc/arena_gint.c
src/kmalloc/arena_osheap.c
src/kmalloc/kmalloc.c
# MMU driver
src/mmu/mmu.c
# R61523 display driver
src/r61523/r61523.c
# R61524 display driver
src/r61524/r61524.c
# Format-agnostic rendering
src/render/dcircle.c
src/render/dellipse.c
src/render/dhline.c
src/render/dimage.c
src/render/dline.c
src/render/dpoly.c
src/render/dprint.c
src/render/drect_border.c
src/render/dtext.c
src/render/dupdate_hook.c
src/render/dvline.c
src/render/dwindow.c
src/render/topti.c
# RGB Rendering
src/render-cg/dclear.c
src/render-cg/dgetpixel.c
src/render-cg/dpixel.c
src/render-cg/drect.c
src/render-cg/dsubimage.c
src/render-cg/dupdate.c
src/render-cg/dvram.c
src/render-cg/dvram.S
src/render-cg/gint_dline.c
src/render-cg/topti-asm.S
src/render-cg/topti.c
# Fast RGB image renderer
src/render-cg/image/image.c
src/render-cg/image/image_rgb16.S
src/render-cg/image/image_rgb16_normal.S
src/render-cg/image/image_rgb16_clearbg_dye.S
src/render-cg/image/image_rgb16_swapcolor.S
src/render-cg/image/image_p8.S
src/render-cg/image/image_p8_normal.S
src/render-cg/image/image_p8_clearbg.S
src/render-cg/image/image_p8_swapcolor.S
src/render-cg/image/image_p8_dye.S
src/render-cg/image/image_p4.S
src/render-cg/image/image_p4_normal.S
src/render-cg/image/image_p4_clearbg.S
src/render-cg/image/image_p4_clearbg_alt.S
src/render-cg/image/image_p4_swapcolor.S
src/render-cg/image/image_p4_dye.S
# Interface to the fast RGB image renderer
src/render-cg/image/image_rgb16.c
src/render-cg/image/image_rgb16_effect.c
src/render-cg/image/image_rgb16_swapcolor.c
src/render-cg/image/image_rgb16_dye.c
src/render-cg/image/image_p8.c
src/render-cg/image/image_p8_effect.c
src/render-cg/image/image_p8_swapcolor.c
src/render-cg/image/image_p8_dye.c
src/render-cg/image/image_p4.c
src/render-cg/image/image_p4_clearbg_alt.c
src/render-cg/image/image_p4_effect.c
src/render-cg/image/image_p4_swapcolor.c
src/render-cg/image/image_p4_dye.c
# Mono rendering
src/render-fx/bopti-asm-gray-scsp.S
src/render-fx/bopti-asm-gray.S
src/render-fx/bopti-asm-mono-scsp.S
src/render-fx/bopti-asm.S
src/render-fx/bopti.c
src/render-fx/dclear.c
src/render-fx/dgetpixel.c
src/render-fx/dpixel.c
src/render-fx/drect.c
src/render-fx/dsubimage.c
src/render-fx/dupdate.c
src/render-fx/gint_dline.c
src/render-fx/masks.c
src/render-fx/topti-asm.S
src/render-fx/topti.c
# RTC driver
src/rtc/rtc.c
src/rtc/rtc_ticks.c
# Sound Processing Unit driver
src/spu/spu.c
# T6K11 display driver
src/t6k11/t6k11.c
# Timer Unit driver
src/tmu/inth-etmu.s
src/tmu/inth-tmu.s
src/tmu/sleep.c
src/tmu/tmu.c
# UBC driver
src/ubc/ubc.c
src/ubc/ubc.S
# USB driver
src/usb/asyncio.c
src/usb/classes/ff-bulk.c
src/usb/classes/ff-bulk-gray.c
src/usb/configure.c
src/usb/pipes.c
src/usb/read4.S
src/usb/setup.c
src/usb/string.c
src/usb/usb.c
src/usb/write4.S
# Video driver interface
src/video/video.c
)
set(ASSETS_FX src/font5x7.png src/gdb/icons-i1msb.png)
set(ASSETS_CG src/font8x9.png src/gdb/icons-rgb565.png)
set(ASSETS_CP ${ASSETS_CG})
fxconv_declare_assets(${ASSETS_FX} ${ASSETS_CG})
include_directories(
"${PROJECT_SOURCE_DIR}/include"
"${PROJECT_BINARY_DIR}/include")
add_compile_options(-Wall -Wextra -std=c11 -Os -g -fstrict-volatile-bitfields -mtas -ffreestanding -flto)
if("${FXSDK_PLATFORM_LONG}" STREQUAL fx9860G)
add_compile_definitions(FX9860G)
set(NAME "gint-fx")
set(LINKER_SCRIPTS
"${CMAKE_CURRENT_BINARY_DIR}/fx9860g.ld")
add_library(${NAME} STATIC ${SOURCES} ${ASSETS_FX} ${LINKER_SCRIPTS})
endif()
if("${FXSDK_PLATFORM_LONG}" STREQUAL fxCG50)
add_compile_definitions(FXCG50)
set(NAME "gint-cg")
set(LINKER_SCRIPTS
"${CMAKE_CURRENT_BINARY_DIR}/fxcg50.ld"
"${CMAKE_CURRENT_BINARY_DIR}/fxcg50_fastload.ld")
add_library(${NAME} STATIC ${SOURCES} ${ASSETS_CG} ${LINKER_SCRIPTS})
endif()
if("${FXSDK_PLATFORM_LONG}" STREQUAL fx9860G_G3A)
add_compile_definitions(FX9860G_G3A)
set(NAME "gint-fxg3a")
set(LINKER_SCRIPTS
"${CMAKE_CURRENT_BINARY_DIR}/fxcg50.ld"
"${CMAKE_CURRENT_BINARY_DIR}/fxcg50_fastload.ld")
add_library(${NAME} STATIC ${SOURCES} ${ASSETS_FX} ${LINKER_SCRIPTS})
endif()
if("${FXSDK_PLATFORM_LONG}" STREQUAL fxCP)
add_compile_definitions(FXCP)
set(NAME "gint-cp")
set(LINKER_SCRIPTS
"${CMAKE_CURRENT_BINARY_DIR}/fxcp_hh2.ld")
add_library(${NAME} STATIC ${SOURCES} ${ASSETS_CP} ${LINKER_SCRIPTS})
endif()
set_target_properties("${NAME}" PROPERTIES OUTPUT_NAME "${NAME}")
# Generate the archive with gcc-ar instead of ar as it will load the LTO plugin
# which is required to generate a usable archive.
set(CMAKE_C_ARCHIVE_CREATE "${CMAKE_C_COMPILER_AR} qcs <TARGET> <OBJECTS>")
# Also the ranlib rule (useless because ar is passed the s flag anyway)
set(CMAKE_C_ARCHIVE_FINISH "${CMAKE_C_COMPILER_RANLIB} <TARGET>")
# Generate linker scripts
macro(generate_linker_script OUTPUT INPUT OPTIONS)
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}"
COMMAND ${FXSDK_TOOLCHAIN}cpp "${CMAKE_CURRENT_SOURCE_DIR}/${INPUT}"
-P -C -traditional-cpp ${OPTIONS} -o "${OUTPUT}"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${INPUT}")
endmacro()
generate_linker_script("fx9860g.ld" "fx9860g.ld.c" "")
generate_linker_script("fxcg50.ld" "fxcg50.ld.c" "")
generate_linker_script("fxcg50_fastload.ld" "fxcg50.ld.c" "-DFXCG50_FASTLOAD")
generate_linker_script("fxcp_hh2.ld" "fxcp_hh2.ld.c" "")
# Library file
install(TARGETS "${NAME}" DESTINATION "${FXSDK_LIB}")
# Linker scripts
install(FILES ${LINKER_SCRIPTS} DESTINATION "${FXSDK_LIB}")
# Headers
install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/"
DESTINATION "${FXSDK_INCLUDE}"
FILES_MATCHING PATTERN "*.h")
# Auto-generated config header
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/include/gint/config.h"
DESTINATION "${FXSDK_INCLUDE}/gint")
# CMake module to find gint
install(FILES cmake/FindGint.cmake DESTINATION "${FXSDK_CMAKE_MODULE_PATH}")
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