Makefile: add USE_E9 to the preprocessor flags and make the relevant files understand it

Makefile

@@ -23,9 +23,10 @@ KERNELDEPS=$(call rwildcard,bin,*.o)
 KERNELSRCDEPS=$(call rwildcard,src,*.c)
 INCLUDEDIR=$(SRCDIR)/include
 ARCHINCLUDE=$(SRCDIR)/arch/$(TARGET)/include
+KERNELCONFIG=
 KERNEL=$(ISO)/kernel
 INITRD=$(ISO)/initrd
-CFLAGS=-c -ffreestanding -mcmodel=kernel -O2 -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -nostdlib -I$(INCLUDEDIR) -I$(ARCHINCLUDE) --debug
+CFLAGS=-c -ffreestanding -mcmodel=kernel -O2 -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -nostdlib -I$(INCLUDEDIR) -I$(ARCHINCLUDE) --debug $(KERNELCONFIG)
 LDFLAGS=-ffreestanding -nostdlib -lgcc -Wl,-T,kernel.ld -debug
 ISO=$(PWD)/boot/$(TARGET)/iso
 SRCDIR=$(PWD)/src/
@@ -60,10 +61,10 @@ sysdisk.iso: $(ISO)
 	xorriso -as mkisofs -b limine-cd.bin -no-emul-boot -boot-load-size 4 -boot-info-table --efi-boot limine-cd-efi.bin -efi-boot-part --efi-boot-image --protective-msdos-label $(ISO) -o sysdisk.iso
 
 run:
-	qemu-system-x86_64 -cdrom sysdisk.iso -m 8G -smp cpus=6
+	qemu-system-x86_64 -cdrom sysdisk.iso -m 8G -smp cpus=6 -debugcon stdio
 
 run-kvm:
-	qemu-system-x86_64 -cdrom sysdisk.iso -m 8G -smp cpus=6 -enable-kvm
+	qemu-system-x86_64 -cdrom sysdisk.iso -m 8G -smp cpus=6 -enable-kvm -debugcon stdio
 
 test:
 	qemu-system-x86_64 -monitor stdio -cdrom sysdisk.iso -d int -no-reboot -no-shutdown -m 8G -smp cpus=6

src/arch/x86_64/e9.c

@@ -1,12 +1,16 @@
 #include <arch/io.h>
 
 void e9_putc(char c){
+	#ifdef USE_E9 
 	outb(0xE9, c);
+	#endif
 }
 
 void e9_puts(char* s){
+	#ifdef USE_E9 
 	size_t len = strlen(s);
 
 	for(uintmax_t i = 0; i < len; ++i)
 		outb(0xE9, s[i]);
+	#endif
 }

src/arch/x86_64/e9out.c

@@ -2,6 +2,8 @@
 #include <arch/e9.h>
 #include <sys/stat.h>
 
+#ifdef USE_E9
+
 #include <stddef.h>
 #include <stdint.h>
 
@@ -26,3 +28,5 @@ static devcalls calls = {
 void e9out_init(){
 	devman_newdevice("e9out", TYPE_CHARDEV, MAJOR_E9OUT, 0, &calls);
 }
+
+#endif

src/arch/x86_64/main.c

@@ -66,8 +66,12 @@ void kmain(){
 	consoledev_init();
 
 	pseudodevs_init();
+	
+	#ifdef USE_E9
 
 	e9out_init();
+
+	#endif
 	
 	fb_init();