update

Makefile

@@ -1,61 +1,92 @@
-all: test cvt
+#
+# Tiny C Compiler Makefile
+#
+prefix=/usr/local
 
-test: prog.bin 
+CFLAGS=-O2 -g -Wall -Wno-parentheses -I.
-	cmp -l prog.bin prog.bin.ref
+LIBS=-ldl
+#CFLAGS=-O2 -g -Wall -Wno-parentheses -I. -pg -static -DPROFILE
+#LIBS=
+
+CFLAGS+=-m386 -malign-functions=0
+DISAS=objdump -D -b binary -m i386
+INSTALL=install
+VERSION=0.9
+
+all: tcc
+
+# auto test
+
+test: test.ref test.out
+	@if diff -u test.ref test.out ; then echo "Auto Test OK"; fi
+
+prog.ref: prog.c 
+	gcc $(CFLAGS) -o $@ $<
+
+test.ref: prog.ref
+	./prog.ref > $@
+
+test.out: tcc prog.c
+	./tcc -I. prog.c > $@
 
 run: tcc prog.c
-	./tcc prog.c
+	./tcc -I. prog.c
 
-run2: tcc tcc1.c prog.c
+run2: tcc tcc.c prog.c
-	./tcc tcc1.c prog.c
+	./tcc -I. tcc.c -I. prog.c
 
-run3: tcc tcc1.c prog.c
+run3: tcc tcc.c prog.c
-	./tcc tcc1.c tcc1.c prog.c
+	./tcc -I. tcc.c -I. tcc.c -I. prog.c
 
-prog.bin: prog.c tcc
+# speed test
-	./tc prog.c $@
+speed: tcc ex2 ex3
-	ndisasm -b 32 $@
+	time ./ex2 1238 2 3 4 10 13 4
+	time ./tcc -I. ./ex2.c 1238 2 3 4 10 13 4
+	time ./ex3 35
+	time ./tcc -I. ./ex3.c 35
 
-p2.bin: p2.c tcc
+ex2: ex2.c
-	./tcc $< $@
+	gcc $(CFLAGS) -o $@ $<
-	ndisasm -b 32 $@
+
+ex3: ex3.c
+	gcc $(CFLAGS) -o $@ $<
 
 # Tiny C Compiler
 
-tcc: tcc.c
+tcc_g: tcc.c Makefile
-	gcc -O2 -Wall -g -o $@ $< -ldl
+	gcc $(CFLAGS) -o $@ $< $(LIBS)
 
-tcc1: tcc1.c
+tcc: tcc_g
-	gcc -O2 -Wall -g -o $@ $<
+	strip -s -R .comment -R .note -o $@ $<
 
-tcc1.i: tcc.c Makefile
+install: tcc 
-	gcc -E -P -o $@ $<
+	$(INSTALL) -m755 tcc $(prefix)/bin
+	mkdir -p $(prefix)/lib/tcc
+	$(INSTALL) -m644 stdarg.h stddef.h tcclib.h $(prefix)/lib/tcc
 
-tcc1.c: tcc1.i cvt Makefile
+clean:
-	./cvt -d $< $@
+	rm -f *~ *.o tcc tcc1 tcct tcc_g prog.ref *.bin *.i ex2 \
-	@ls -l $@
+           core gmon.out test.out test.ref a.out
 
-# obfuscated C compiler
+# target for development
-otcc: otcc.c
-	gcc -O2 -Wall -g -o $@ $< -ldl
 
-otcc.i: otcc.c Makefile
+%.bin: %.c tcct
-	gcc -E -P -DTINY -o $@ $<
+	./tcct -I. $< $@
+	$(DISAS) $@
 
-otcc1.c: otcc.i cvt Makefile
+tcct: tcc.c
-	./cvt $< $@
+	gcc -DTEST $(CFLAGS) -o $@ $< -ldl
-	@ls -l $@
-
-orun: otcc otcc1.c
-	./otcc otcc1.c ex1.c
-
-# misc
-
-cvt: cvt.c
-	gcc -O2 -Wall -g -o $@ $<
 
 instr.o: instr.S
 	gcc -O2 -Wall -g -c -o $@ $<
 
-clean:
+FILE=tcc-$(VERSION)
-	rm -f *~ *.o tcc tcc1 cvt 
+
+tar:
+	rm -rf /tmp/$(FILE)
+	cp -r ../tcc /tmp/$(FILE)
+	( cd /tmp ; tar zcvf ~/$(FILE).tar.gz \
+          $(FILE)/Makefile $(FILE)/README $(FILE)/TODO $(FILE)/COPYING \
+          $(FILE)/tcc.c $(FILE)/stddef.h $(FILE)/stdarg.h $(FILE)/tcclib.h \
+          $(FILE)/ex*.c $(FILE)/prog.c )
+	rm -rf /tmp/$(FILE)

README

@@ -1,23 +1,5 @@
-Tiny C Compiler - Make the best x86 Linux C compiler in less than 8192 bytes.
+Tiny C Compiler - C Scripting Everywhere - The Smallest ANSI C compiler
------------------------------------------------------------------------------
+-----------------------------------------------------------------------
-
-Differences with ANSI C:
------------------------
-
-- Preprocessor: only '#define xx yy' is supported. Recursive defined
-  supported. All other directives are not supported.
-
-- Types: int, char, void, pointers and functions are
-  supported. Function pointers are also supported. struct, union and
-  typedef not supported.
-
-- Operations: 'x=' not supported.
-
-- Keywords: the following keywords are supported: int void char if
-  else while break return for.
-
-- Symbol scope: local variables supported, but they cannot have the
-  same name as global variables.
 
 Features:
 --------
@@ -25,25 +7,123 @@ Features:
 - SMALL! You can compile and execute C code everywhere, for example on
   rescue disks.
 
-- FAST! tcc generate x86 code. No byte code overhead.
+- FAST! tcc generates optimized x86 code. No byte code overhead.
 
-- Compile and execute C source directly. No linking necessary.
+- UNLIMITED! Any C dynamic library can be used directly. TCC is
+  heading torwards full ANSI C compliance. TCC can of course compile
+  itself.
 
-- C script supported : just add '#!/usr/bin/tcc' at the first line of
+- Compile and execute C source directly. No linking or assembly
-  your C source, and execute it directly from the command line !
+  necessary. Full C preprocessor included.
 
-- All C library functions can be used via dynamic linking.
+- C script supported : just add '#!/usr/local/bin/tcc' at the first
+  line of your C source, and execute it directly from the command line !
 
--------------------------------------------------------------------------
+- For adventurers, tcc is conceived to be able to generate code for
-An even smaller compiler can be build from tcc by activating the
+  other targets.
-define 'TINY'. The following changes from tcc:
 
-- Comments are not supported.
+Documentation:
+-------------
 
-- Parsing: No char constants. No '\r' and '\t' in strings. Only base
+1) Installation
-  10 numbers are supported.
 
-- no 'for' loops.
+***TCC currently only work on Linux x86***.
 
-- Operations: '?:', ',', 'x=', shifts, '&&', '||', '!', '~' not supported.
+Type 'make install' to compile and install tcc in /usr/local and
+/usr/local/lib/tcc.
 
+2) Introduction
+
+We assume here that you know ANSI C. Look at the example ex1.c to know
+what the programs look like.
+
+The main limitations of tcc are that you cannot use floats. 
+
+The include file <tcclib.h> can be used if you want a small basic libc
+include support (especially useful for floppy disks). Of course, you
+can also use standard headers, although they are slower to compile.
+
+You can begin your C script with '#!/usr/local/bin/tcc' on the first
+line and set its execute bits (chmod a+x your_script). Then, you can
+launch the C code as a shell or perl script :-) The command line
+arguments are put in 'argc' and 'argv' of the main functions, as in
+ANSI C.
+
+3) Invokation
+
+'-Idir' : specify an additionnal include path. The
+default ones are: /usr/include, /usr/lib/tcc, /usr/local/lib/tcc.
+
+'-Dsym' : define preprocessor symbol 'sym' to 1.
+
+'-lxxx' : dynamically link your program with library
+libxxx.so. Standard library paths are checked, including those
+specificed with LD_LIBRARY_PATH.
+
+Only one source code can be compiled. If you have multiple source
+files, add one which includes all your sources.
+
+4) Examples
+
+ex1.c: simplest example (hello world). Can also be launched directly
+as a script: ./ex2.c.
+
+ex2.c: more complicated example: find a number with the four
+operations given a list of numbers (benchmark).
+
+ex3.c: compute fibonacci numbers (benchmark).
+
+ex4.c: more complicated: X11 program. Very complicated test in fact
+because standard headers are being used ! Currently slow because
+parsing does not use hash tables.
+
+ex5.c: 'hello world' with standard glibc headers.
+
+tcc.c: TCC can compile itself. Used to check the code generator.
+
+prog.c: auto test for TCC which tests many subtle possible bugs. Used
+when doing 'make test'.
+
+Exact differences with ANSI C:
+-----------------------------
+
+1) Preprocessor
+
+ - the preprocessor tokens are the same as C. It means that in some
+  rare cases, preprocessed numbers are not handled exactly as in ANSI
+  C. This approach has the advantage of being simpler and FAST!
+
+ - __LINE__, __FILE__, __DATE__, __TIME__ are currently not handled.
+
+ - #line not handled
+
+2) C language
+
+- Parsing: variables cannot be initialized ('int a = 1' or 'int tab[2] =
+  {1, 2}' not supported).
+
+- Cannot pass struct/union as value. Cannot assign struct/union (use
+  memcpy instead).
+
+- Types: floating point numbers are not supported.
+
+- (BUG) 'char' and 'short' casts do not truncate correctly.
+
+- 'sizeof' may not work if too complex expression is given.
+
+Supported C extensions:
+----------------------
+
+- 'inline' keyword is ignored.
+
+
+License:
+-------
+
+TCC is distributed under the GNU Generic Public License (see COPYING
+file). 
+
+I accept only patches where you give your copyright explictely to me
+to simplify licensing issues.
+
+Fabrice Bellard - Nov 11, 2001.

TODO

@@ -1,7 +1,15 @@
+TODO list:
 
-- static arrays
+Critical:
-- external symbols (vars)
+
-- continue/do while/switch/case/goto
+- add hash tables for symbols (useful for long programs)
-- 'x'=
+- 0 is pointer - fix type compare
-- constant propagation for '+', '-' and [].
+- add message if external function or variable not found.
-- verify function types
+
+Not critical:
+
+- fix preprocessor symbol redefinition 
+- better constant opt (&&, ||, ?:)
+- function pointers to forward reference (patch code generator) 
+- add PowerPC code generator.
+- add portable byte code generator and interpreter.

stdarg.h

@@ -4,8 +4,12 @@
 typedef char *va_list;
 
 /* only correct for i386 */
-#define va_start(ap,last) ap=(char *)&(last); 
+/* XXX: incorrect for type size different than 4 bytes*/
-#define va_arg(ap,type) (ap-=sizeof (type), *(type *)(ap))
+#define va_start(ap,last) ap = ((char *)&(last)) + sizeof(int); 
+#define va_arg(ap,type) (ap += sizeof(int), *(type *)(ap - sizeof(int)))
 #define va_end(ap)
 
+/* fix a buggy dependency on GCC in libio.h */
+typedef va_list __gnuc_va_list;
+
 #endif

stddef.h

@@ -3,7 +3,7 @@
 
 /* TCC include file */
 #define NULL ((void *)0)
-
 typedef unsigned int size_t;
+typedef int wchar_t;
 
 #endif

tcclib.h

@@ -19,6 +19,9 @@ unsigned long int strtoul(const char *nptr, char **endptr, int base);
 /* stdio.h */
 typedef struct __FILE FILE;
 #define EOF (-1)
+extern FILE *stdin;
+extern FILE *stdout;
+extern FILE *stderr;
 FILE *fopen(const char *path, const char *mode);
 FILE *fdopen(int fildes, const char *mode);
 FILE *freopen(const  char *path, const char *mode, FILE *stream);
@@ -58,6 +61,10 @@ void *memset(void *s, int c, size_t n);
 char *strdup(const char *s);
 
 /* dlfcn.h */
+#define RTLD_LAZY       0x001
+#define RTLD_NOW        0x002
+#define RTLD_GLOBAL     0x100
+
 void *dlopen(const char *filename, int flag);
 const char *dlerror(void);
 void *dlsym(void *handle, char *symbol);