libtcc: new LIBTCCAPI tcc_set_options(TCCState*, const char*str)

This replaces       -> use instead:
-----------------------------------
- tcc_set_linker    -> tcc_set_options(s, "-Wl,...");
- tcc_set_warning   -> tcc_set_options(s, "-W...");
- tcc_enable_debug  -> tcc_set_options(s, "-g");

parse_args is moved to libtcc.c (now tcc_parse_args).

Also some cleanups:
- reorder TCCState members
- add some comments here and there
- do not use argv's directly, make string copies
- use const char* in tcc_set_linker
- tccpe: use fd instead of fp

tested with -D MEM_DEBUG: 0 bytes left

win32/tcc-win32.txt

@@ -6,13 +6,11 @@
     under MS-Windows.  See tcc-doc.html to have all the features.
 
 
-
     Installation from the binary ZIP package:
     -----------------------------------------
     Unzip the package to a directory of your choice.
     
 
-
     Set the system PATH:
     --------------------
     To be able to invoke the compiler from everywhere on your computer by
@@ -20,7 +18,6 @@
     system PATH.
 
 
-
     Examples:
     ---------
     Open a console window (DOS box) and 'cd' to the examples directory.
@@ -39,9 +36,23 @@
 	tiny_impdef dll.dll (optional)
         tcc hello_dll.c dll.def
 
-    For the 'libtcc_test' example type
 
-        tcc examples/libtcc_test.c -I libtcc -L libtcc -ltcc
+    Using libtcc as JIT compiler in your program
+    --------------------------------------------
+    Check out the 'libtcc_test' example:
+
+    - Running it from source:
+        tcc -I libtcc libtcc/libtcc.def -run examples/libtcc_test.c
+
+    - Compiling with TCC:
+        tcc examples/libtcc_test.c -I libtcc libtcc/libtcc.def
+
+    - Compiling with MinGW:
+        gcc examples/libtcc_test.c -I libtcc libtcc.dll
+
+    - Compiling with MSVC:
+        lib /def:libtcc\libtcc.def /out:libtcc.lib
+        cl /MD examples/libtcc_test.c -I libtcc libtcc.lib
 
 
     Import Definition Files:
@@ -58,7 +69,6 @@
     the TCC commandline to link a program that uses opengl32.dll.
 
 
-
     Header Files:
     -------------
     The system header files (except _mingw.h) are from the MinGW
@@ -71,7 +81,6 @@
     into your "tcc/include/winapi" directory.
 
 
-
     Resource Files:
     ---------------
     TCC can link windows resources in coff format as generated by MinGW's
@@ -81,7 +90,6 @@
         tcc app.c appres.o -o app.exe
 
 
-
     Tiny Libmaker:
     --------------
     The included tiny_libmaker tool by Timovj Lahde can be used as
@@ -90,29 +98,26 @@
 	tiny_libmaker [rcs] library objectfiles ...
 
 
-
     Compilation from source:
     ------------------------
     * You can use the MinGW and MSYS tools available at
 
         http://www.mingw.org
 
-    Untar the TCC archive and type in the MSYS shell:
+      Untar the TCC archive and type in the MSYS shell:
 
-       ./configure
-       make
-       make install
+        ./configure [--prefix installpath]
+        make
+        make install
 
     The default install location is c:\Program Files\tcc
 
-
     * Alternatively you can compile TCC with just GCC from MinGW using
 
-        win32\build-tcc.bat
-
-    To install, copy the entire contents of the win32 directory to
-    where you want.
+        build-tcc.bat (from the win32 directory)
 
+      To install, copy the entire contents of the win32 directory to
+      where you want.
 
 
     Limitations:
@@ -128,7 +133,6 @@
     - Bounds checking (option -b) is not supported on 64-bit OS.
 
 
-
     Documentation and License:
     --------------------------
     TCC is distributed under the GNU Lesser General Public License. (See
@@ -139,7 +143,6 @@
 	http://fabrice.bellard.free.fr/tcc/
 
 
-
     WinAPI Help and 3rd-party tools:
     --------------------------------
     The Windows API documentation (Win95) in a single .hlp file is
@@ -150,5 +153,4 @@
     "ResEd", available at the RadASM website.
 
 
-
     --- grischka