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Make kernel build with clang.

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It's a bit faster than g++ and seems to generate perfectly fine code.
The kernel is also roughly 10% smaller(!)
This commit is contained in:
Andreas Kling 2018-11-09 12:20:44 +01:00
parent 7b3b5f745f
commit ebf308d413
10 changed files with 40 additions and 27 deletions
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8
Kernel/Makefile
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@ -55,19 +55,19 @@ BOOTLOADER = Boot/boot.bin
IMAGE = .floppy-image
ARCH_FLAGS =
STANDARD_FLAGS = -std=c++17 -nostdinc++ -nostdlib #-nostdinc
KERNEL_FLAGS = -ffreestanding -fno-stack-protector -fno-ident
KERNEL_FLAGS = -ffreestanding -fno-stack-protector -fno-ident -fno-builtin
WARNING_FLAGS = -Wextra -Wall -Wundef -Wcast-qual -Wwrite-strings
FLAVOR_FLAGS = -mregparm=3 -march=i386 -m32 -fno-exceptions -fno-rtti -fmerge-all-constants -fno-unroll-loops -fno-pie -fno-pic
OPTIMIZATION_FLAGS = -Os -fno-asynchronous-unwind-tables
OPTIMIZATION_FLAGS = -Oz -fno-asynchronous-unwind-tables
INCLUDE_FLAGS = -I.. -I.
SUGGEST_FLAGS = -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override #-Wsuggest-attribute=noreturn
#SUGGEST_FLAGS = -Wsuggest-final-types -Wsuggest-final-methods -Wsuggest-override #-Wsuggest-attribute=noreturn
DEFINES = -DSERENITY -DKERNEL -DSANITIZE_PTRS
CXXFLAGS = $(WARNING_FLAGS) $(OPTIMIZATION_FLAGS) $(KERNEL_FLAGS) $(FLAVOR_FLAGS) $(ARCH_FLAGS) $(STANDARD_FLAGS) $(SUGGEST_FLAGS) $(INCLUDE_FLAGS) $(DEFINES)
#CXX = /usr/local/gcc-4.8.1-for-linux64/bin/x86_64-pc-linux-g++
#LD = /usr/local/gcc-4.8.1-for-linux64/bin/x86_64-pc-linux-ld
CXX = g++-8
CXX = clang
LD = ld
LDFLAGS = -T linker.ld --strip-debug -melf_i386 --gc-sections --build-id=none -z norelro -z now