Add all_source_host ninja target

Former-commit-id: 80d36b0deb

configure.py

@@ -1134,6 +1134,10 @@ else:
            description="AR $out")
     n.newline()
 
+n.rule(name="host_cc", command="clang -I include/ -o $out $in",
+           description="host_cc $out")
+n.newline()
+
 ###
 # Build
 ###
@@ -1172,6 +1176,11 @@ for lib in LIBS:
                         "basedir": os.path.dirname(f"$builddir/src/{object}"),
                         "basefile": f"$builddir/src/{object}"
                     })
+            n.build(f"$builddir/host/{object}.o", "host_cc", c_file,
+                    variables={
+                        "basedir": os.path.dirname(f"$builddir/src/{object}"),
+                        "basefile": f"$builddir/src/{object}"
+                    })
             if add_to_all:
                 all_source_files.append(f"$builddir/src/{object}.o")
         if os.path.exists(os.path.join("asm", f"{object}.s")):
@@ -1217,6 +1226,13 @@ n.comment("Adds a command for building all source files")
 n.build("all_source", "phony", all_source_files)
 n.newline()
 
+###
+# Helper rule for building all source files, with a host compiler
+###
+n.comment("Adds a command for building all source files with a host compiler")
+n.build("all_source_host", "phony", [s.replace("/src/", "/host/") for s in all_source_files])
+n.newline()
+
 ###
 # Generate DOL
 ###