Fix running on bochs by forcing x86 pentium codegen

kernel/make.i386_pc.flags

@@ -1,6 +1,7 @@
 clang_res_dir := $(shell $(cc) -print-resource-dir)
 
 kernel_cflags   := --target=i386-none-elf \
+                   -march=pentium \
                    -nostdinc \
                    -nostdlib \
                    -ffreestanding \
@@ -8,7 +9,8 @@ kernel_cflags   := --target=i386-none-elf \
                    -std=c11 \
                    -pedantic \
                    -Wall \
-                   -Wextra
+                   -Wextra \
+                   -ffunction-sections -fdata-sections
 
 ifeq ($(build),debug)
 kernel_cflags   += -O0 -g
@@ -27,6 +29,8 @@ kernel_ldflags  := -mcpu=i386 \
                    -flto \
                    -static \
                    -Wl,--build-id=none \
+                   -Wl,--gc-sections \
+                   -Wl,--strip-all \
                    $(clang_res_dir)/lib/*/libclang_rt.builtins-i386.a
 
 ifeq ($(build),debug)