diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/bfd/config.bfd binutils-2.37/bfd/config.bfd
--- binutils-2.37-orig/bfd/config.bfd	2021-07-08 13:37:19.000000000 +0200
+++ binutils-2.37/bfd/config.bfd	2021-09-17 21:43:33.046584668 +0200
@@ -739,6 +739,13 @@
     targ_underscore=yes
     ;;
 
+#ifdef BFD64
+  x86_64-*-karlos*)
+    targ_defvec=x86_64_elf64_vec
+    want64=true
+    ;;
+#endif
+
   ia16-*-elf)
     targ_defvec=i386_elf32_vec
     targ_selvecs="i386_msdos_vec i386_aout_vec"
diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/config.sub binutils-2.37/config.sub
--- binutils-2.37-orig/config.sub	2021-07-08 13:37:19.000000000 +0200
+++ binutils-2.37/config.sub	2021-09-17 21:34:30.728424266 +0200
@@ -1729,6 +1729,7 @@
 	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
+         | karlos* \
 	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
 		;;
 	# This one is extra strict with allowed versions
diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/gas/configure.tgt binutils-2.37/gas/configure.tgt
--- binutils-2.37-orig/gas/configure.tgt	2021-07-08 13:37:19.000000000 +0200
+++ binutils-2.37/gas/configure.tgt	2021-09-17 21:43:15.221415056 +0200
@@ -259,6 +259,7 @@
   i386-*-*nt*)				fmt=coff em=pe ;;
   i386-*-rdos*)				fmt=elf ;;
   i386-*-darwin*)			fmt=macho ;;
+  i386-*-karlos*)           fmt=elf ;;
 
   ia16-*-elf*)				fmt=elf ;;
 
diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/ld/Makefile.am binutils-2.37/ld/Makefile.am
--- binutils-2.37-orig/ld/Makefile.am	2021-07-08 13:37:20.000000000 +0200
+++ binutils-2.37/ld/Makefile.am	2021-09-17 23:11:24.688453612 +0200
@@ -456,6 +456,7 @@
 	eelf_x86_64_cloudabi.c \
 	eelf_x86_64_fbsd.c \
 	eelf_x86_64_sol2.c \
+	eelf_x86_64_karlos.c \
 	ehppa64linux.c \
 	ei386pep.c \
 	emmo.c
@@ -942,6 +943,7 @@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_cloudabi.Pc@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_fbsd.Pc@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_sol2.Pc@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/eelf_x86_64_karlos.Pc@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ehppa64linux.Pc@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ei386pep.Pc@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/emmo.Pc@am__quote@
diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/ld/configure.tgt binutils-2.37/ld/configure.tgt
--- binutils-2.37-orig/ld/configure.tgt	2021-07-08 13:37:20.000000000 +0200
+++ binutils-2.37/ld/configure.tgt	2021-09-17 22:38:47.128321309 +0200
@@ -1001,6 +1001,9 @@
 			targ_extra_emuls=i386pe
 			targ_extra_ofiles="deffilep.o pep-dll.o pe-dll.o"
 			;;
+x86_64-*-karlos*)	targ_emul=elf_x86_64_karlos
+			targ_extra_emuls="elf_x86_64"
+			;;
 xc16x-*-elf)		targ_emul=elf32xc16x
 			targ_extra_emuls="elf32xc16xl elf32xc16xs"
 			;;
@@ -1085,6 +1088,10 @@
   NATIVE_LIB_DIRS='/usr/local/lib /usr/ccs/lib /lib /usr/lib'
   ;;
 
+*-*-karlos*)
+  NATIVE_LIB_DIRS='/lib'
+  ;;
+
 esac
 
 case "${target}" in
diff -Naur -x Makefile.in -x aclocal.m4 binutils-2.37-orig/ld/emulparams/elf_x86_64_karlos.sh binutils-2.37/ld/emulparams/elf_x86_64_karlos.sh
--- binutils-2.37-orig/ld/emulparams/elf_x86_64_karlos.sh	1970-01-01 01:00:00.000000000 +0100
+++ binutils-2.37/ld/emulparams/elf_x86_64_karlos.sh	2021-09-17 21:50:15.081410176 +0200
@@ -0,0 +1 @@
+. ${srcdir}/emulparams/elf_x86_64.sh