make: create native tcc from separate objects

This was already possible using
    make NOTALLINONE=1
and is now the default.

To build as previously from one big source, use
    make ONE_SOURCE=1

Cross compilers are still build from one source because using
separate objects requires separate build directories one per
platform which currently is not (yet) supported by the makefile.

We could probably use gnu-makeish target variables like
    $(I386_CROSS): OUTDIR=build/i386
    $(X64_CROSS): OUTDIR=build/x86-64
and so on ...

Also NEED_FLOAT_TYPES for arm-gen is removed.  It was about
variables that are referenced from outside (libtcc, tccgen).
We could declare them in tcc.h (as with reg_classes) or have
them twice in arm-gen.c.  I chose option 2.

Makefile

@@ -157,7 +157,7 @@ tcc$(EXESUF): tcc.o $(LIBTCC)
 
 # Cross Tiny C Compilers
 %-tcc$(EXESUF):
-	$(CC) -o $@ tcc.c $(DEFINES) $(CFLAGS) $(LIBS) $(LDFLAGS)
+	$(CC) -o $@ tcc.c -DONE_SOURCE $(DEFINES) $(CFLAGS) $(LIBS) $(LDFLAGS)
 
 $(I386_CROSS): DEFINES = -DTCC_TARGET_I386 -DCONFIG_TCCDIR="\"$(tccdir)/i386\""
 $(X64_CROSS): DEFINES = -DTCC_TARGET_X86_64
@@ -179,14 +179,13 @@ $(C67_CROSS): $(C67_FILES)
 $(ARM_FPA_CROSS) $(ARM_FPA_LD_CROSS) $(ARM_VFP_CROSS) $(ARM_EABI_CROSS): $(ARM_FILES)
 
 # libtcc generation and test
-ifdef NOTALLINONE
+ifndef ONE_SOURCE
 LIBTCC_OBJ = $(filter-out tcc.o,$(patsubst %.c,%.o,$(filter %.c,$(NATIVE_FILES))))
 LIBTCC_INC = $(filter %.h,$(CORE_FILES)) $(filter-out $(CORE_FILES),$(NATIVE_FILES))
-$(LIBTCC_OBJ) tcc.o : NATIVE_DEFINES += -DNOTALLINONE
 else
 LIBTCC_OBJ = libtcc.o
 LIBTCC_INC = $(NATIVE_FILES)
-tcc.o : NATIVE_DEFINES += -DNOTALLINONE
+$(LIBTCC_OBJ) tcc.o : NATIVE_DEFINES += -DONE_SOURCE
 endif
 
 $(LIBTCC_OBJ) tcc.o : %.o : %.c $(LIBTCC_INC)

arm-gen.c

@@ -102,10 +102,8 @@ enum {
 //#define FUNC_STRUCT_PARAM_AS_PTR
 
 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
-#ifdef NEED_FLOAT_TYPES
+ST_DATA CType float_type, double_type, func_float_type, func_double_type;
-static CType float_type, double_type, func_float_type, func_double_type;
 #define func_ldouble_type func_double_type
-#endif
 #else
 #define func_float_type func_old_type
 #define func_double_type func_old_type
@@ -172,6 +170,11 @@ ST_DATA const int reg_classes[NB_REGS] = {
 #endif
 };
 
+/* keep in sync with line 104 above */
+#if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
+ST_DATA CType float_type, double_type, func_float_type, func_double_type;
+#endif
+
 static int func_sub_sp_offset, last_itod_magic;
 static int leaffunc;
 

libtcc.c

@@ -18,7 +18,6 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#define NEED_FLOAT_TYPES
 #include "tcc.h"
 
 /********************************************************/
@@ -41,7 +40,7 @@ ST_DATA void *rt_prog_main;
 
 /********************************************************/
 
-#ifndef NOTALLINONE
+#ifdef ONE_SOURCE
 #include "tccpp.c"
 #include "tccgen.c"
 #include "tccelf.c"

tcc.c

@@ -18,10 +18,10 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#if defined NOTALLINONE || defined TCC_USE_LIBTCC
+#ifdef ONE_SOURCE
-#include "tcc.h"
-#else
 #include "libtcc.c"
+#else
+#include "tcc.h"
 #endif
 
 static char **files;

tcc.h

@@ -877,7 +877,7 @@ static inline int toup(int c)
 
 #define PUB_FUNC 
 
-#ifndef NOTALLINONE
+#ifdef ONE_SOURCE
 #define ST_INLN static inline
 #define ST_FUNC static
 #define ST_DATA static
@@ -1278,7 +1278,7 @@ ST_DATA const int reg_classes[NB_REGS];
 
 /********************************************************/
 #undef ST_DATA
-#ifndef NOTALLINONE
+#ifdef ONE_SOURCE
 #define ST_DATA static
 #else
 #define ST_DATA

tccpe.c

@@ -376,7 +376,7 @@ static int pe_find_import(TCCState * s1, ElfW(Sym) *sym)
 {
     char buffer[200];
     const char *s, *p;
-    int sym_index, n = 0;
+    int sym_index = 0, n = 0;
 
     do {
         s = pe_export_name(s1, sym);

win32/build-tcc.bat

@@ -29,11 +29,11 @@ echo>>..\config.h #define CONFIG_SYSROOT ""
 :libtcc
 if not exist libtcc\nul mkdir libtcc
 copy ..\libtcc.h libtcc\libtcc.h
-%CC% %target% -fno-strict-aliasing ../libtcc.c -c -o libtcc.o
+%CC% %target% -fno-strict-aliasing -DONE_SOURCE ../libtcc.c -c -o libtcc.o
 %AR% rcs libtcc/libtcc.a libtcc.o
 
 :tcc
-%CC% %target% -fno-strict-aliasing ../tcc.c -o tcc.exe -DTCC_USE_LIBTCC -ltcc -Llibtcc
+%CC% %target% -fno-strict-aliasing ../tcc.c -o tcc.exe -ltcc -Llibtcc
 
 :copy_std_includes
 copy ..\include\*.h include