diff --git a/README b/README
index 5f93029..1a6c960 100644
--- a/README
+++ b/README
@@ -8,7 +8,7 @@ still missing,including:
 - Full GNU-style inline assembly support.
 	The original versions of __syscall4(),__syscall5() and __syscall6()
 	don't work.They are replaced by assembly implemention in
-	/src/unistd/x86_64/syscall.S
+	/src/internal/x86_64/syscall.S
 - math library is removed momently.
 	Because some missing floating-point features of TinyCC.I am working
 	on completing.
@@ -25,6 +25,12 @@ To compile,simply run
 	./configure --target=x86_64	# The script cannot detect the
 					# platform with tcc because of
 					# missing option "-dumpmachine"
-	make
+	make				# I finish my compiling in 10s with
+					  two threads on i7-720QM @ 1.60GHz
 
 All modified and addtional files are under MIT License as well.
+Some changes are made to my TinyCC (This means I may have a different
+version from yours,so if you fail to compile,try to apply the patches
+listed in /tcc-patch/,including:
+- empty_archive.patch
+	Enables TinyCC to generate empty ar archive
diff --git a/tcc-patch/empty_archive.patch b/tcc-patch/empty_archive.patch
new file mode 100644
index 0000000..6bab04a
--- /dev/null
+++ b/tcc-patch/empty_archive.patch
@@ -0,0 +1,34 @@
+diff --git a/tcctools.c b/tcctools.c
+index 4567b81..7c643dc 100644
+--- a/tcctools.c
++++ b/tcctools.c
+@@ -61,7 +61,7 @@ static int contains_any(const char *s, const char *list) {
+ }
+ 
+ static int ar_usage(int ret) {
+-    fprintf(stderr, "usage: tcc -ar [rcsv] lib file...\n");
++    fprintf(stderr, "usage: tcc -ar [rcsv] lib [file...]\n");
+     fprintf(stderr, "create library ([abdioptxN] not supported).\n");
+     return ret;
+ }
+@@ -115,8 +115,9 @@ ST_FUNC int tcc_tool_ar(TCCState *s1, int argc, char **argv)
+         }
+     }
+ 
+-    if (!i_obj)  // i_obj implies also i_lib. we require both.
++    if (!i_lib)  // i_obj implies also i_lib.
+         ret = 1;
++    i_obj = i_obj ? i_obj : argc;  // An empty archive will be generated if no input file is given
+ 
+     if (ret == 1)
+         return ar_usage(ret);
+@@ -242,6 +243,9 @@ ST_FUNC int tcc_tool_ar(TCCState *s1, int argc, char **argv)
+         hofs++, fpos = 1;
+     // write header
+     fwrite("!<arch>\n", 8, 1, fh);
++    // create an empty archive
++    if (!funccnt)
++        goto the_end;
+     sprintf(stmp, "%-10d", (int)(strpos + (funccnt+1) * sizeof(int)));
+     memcpy(&arhdr.ar_size, stmp, 10);
+     fwrite(&arhdr, sizeof(arhdr), 1, fh);