openbsd.boot-config: init

Co-Authored-By: Audrey Dutcher <audrey@rhelmot.io>

pkgs/os-specific/bsd/openbsd/pkgs/boot-config.nix

@@ -0,0 +1,32 @@
+{
+  mkDerivation,
+  lib,
+  flex,
+  byacc,
+  compatHook,
+}:
+mkDerivation {
+  path = "usr.sbin/config";
+
+  extraNativeBuildInputs = [
+    flex
+    byacc
+    compatHook
+  ];
+
+  postPatch = ''
+    rm $BSDSRCDIR/usr.sbin/config/ukc.c
+    rm $BSDSRCDIR/usr.sbin/config/ukcutil.c
+    rm $BSDSRCDIR/usr.sbin/config/cmd.c
+    rm $BSDSRCDIR/usr.sbin/config/exec_elf.c
+  '';
+
+  buildPhase = ''
+    for f in *.l; do flex $f; done
+    for f in *.y; do yacc -H ''${f%.y}.h $f; done
+    for f in *.c; do $CC -I$TMP/include -DMAKE_BOOTSTRAP -c $f; done
+    $CC *.o -o config
+  '';
+
+  meta.platforms = lib.platforms.linux;
+}