drop alloca #define

(Because GNU's alloca.h unconditionally #undef's alloca)

Also, remove gcc specific sections in headers. and
instead change tests such that gcc does not use them.

Makefile

@@ -236,7 +236,7 @@ install: $(PROGS) $(LIBTCC1) libtcc.a tcc-doc.html
 	$(INSTALL) -m644 $(LIBTCC1) win32/lib/*.def "$(tccdir)/lib"
 	cp -r win32/include/. "$(tccdir)/include"
 	cp -r win32/examples/. "$(tccdir)/examples"
-	$(INSTALL) -m644 $(addprefix include/,$(TCC_INCLUDES)) "$(tccdir)/include"
+#	$(INSTALL) -m644 $(addprefix include/,$(TCC_INCLUDES)) "$(tccdir)/include"
 	$(INSTALL) -m644 tcc-doc.html win32/tcc-win32.txt "$(tccdir)/doc"
 	$(INSTALL) -m644 libtcc.a libtcc.h "$(tccdir)/libtcc"
 endif

include/stdarg.h

@@ -2,9 +2,6 @@
 #define _STDARG_H
 
 #ifdef __x86_64__
-
-#ifdef __TINYC__
-
 #include <stdlib.h>
 
 /* GCC compatible definition of va_list. */
@@ -53,19 +50,6 @@ typedef struct __va_list_struct *va_list;
 
 #else
 
-/* for GNU C */
-
-typedef __builtin_va_list va_list;
-
-#define va_start(ap, last) __builtin_va_start(ap, last)
-#define va_arg(ap, type) __builtin_va_arg(ap, type)
-#define va_copy(dest, src) __builtin_va_copy(dest, src)
-#define va_end(ap) __builtin_va_end(ap)
-
-#endif
-
-#else
-
 typedef char *va_list;
 
 /* only correct for i386 */

include/stddef.h

@@ -7,10 +7,7 @@ typedef __WCHAR_TYPE__ wchar_t;
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 #define offsetof(type, field) ((size_t) &((type *)0)->field)
 
-/* need to do that because of glibc 2.1 bug (should have a way to test
-   presence of 'long long' without __GNUC__, or TCC should define
-   __GNUC__ ? */
-#if !defined(__int8_t_defined) && !defined(__dietlibc__)
+#ifndef __int8_t_defined
 #define __int8_t_defined
 typedef char int8_t;
 typedef short int int16_t;
@@ -18,9 +15,6 @@ typedef int int32_t;
 typedef long long int int64_t;
 #endif
 
-#ifdef __i386__
-void *_alloca(size_t);
-#define alloca _alloca
-#endif
+void *alloca(size_t size);
 
 #endif

lib/alloca86-bt.S

@@ -3,9 +3,9 @@
 
 #include "../config.h"
 
-.globl __bound__alloca
+.globl __bound_alloca
 
-__bound__alloca:
+__bound_alloca:
     pop     %edx
     pop     %eax
     mov     %eax, %ecx

lib/alloca86.S

@@ -3,9 +3,9 @@
 
 #include "../config.h"
 
-.globl _alloca
+.globl alloca
 
-_alloca:
+alloca:
     pop     %edx
     pop     %eax
     add     $3,%eax

libtcc.c

@@ -694,7 +694,7 @@ static void put_extern_sym2(Sym *sym, Section *section,
             case TOK_memset:
             case TOK_strlen:
             case TOK_strcpy:
-            case TOK__alloca:
+            case TOK_alloca:
                 strcpy(buf, "__bound_");
                 strcat(buf, name);
                 name = buf;

tcctok.h

@@ -228,7 +228,7 @@
      DEF(TOK_memmove, "memmove")
      DEF(TOK_strlen, "strlen")
      DEF(TOK_strcpy, "strcpy")
-     DEF(TOK__alloca, "_alloca")
+     DEF(TOK_alloca, "alloca")
 #endif
 
 /* Tiny Assembler */

tests/Makefile

@@ -37,7 +37,8 @@ libtcc_test$(EXESUF): libtcc_test.c ../libtcc.a
 
 # test.ref - generate using gcc
 test.ref: tcctest.c
-	$(CC) -o tcctest.gcc $< -w -I.. -I../include $(CFLAGS)
+	cp -u ../include/tcclib.h .
+	$(CC) -o tcctest.gcc $< -I. -w $(CFLAGS)
 	./tcctest.gcc > $@
 
 # auto test
@@ -141,4 +142,4 @@ cache: tcc_g
 # clean
 clean:
 	rm -vf *~ *.o *.a *.bin *.i *.ref *.out *.out? *.gcc \
-	   tcctest[1234] ex? libtcc_test$(EXESUF) tcc_g
+	   tcctest[1234] ex? libtcc_test$(EXESUF) tcc_g tcclib.h

tests/tcctest.c

@@ -75,6 +75,7 @@ void stdarg_test(void);
 void whitespace_test(void);
 void relocation_test(void);
 void old_style_function(void);
+void alloca_test(void);
 void sizeof_test(void);
 void typeof_test(void);
 void local_label_test(void);
@@ -529,6 +530,7 @@ int main(int argc, char **argv)
     whitespace_test();
     relocation_test();
     old_style_function();
+    alloca_test();
     sizeof_test();
     typeof_test();
     statement_expr_test();
@@ -1935,6 +1937,18 @@ void old_style_function(void)
     decl_func2(NULL);
 }
 
+void alloca_test()
+{
+#if defined __i386__ || defined __x86_64__
+    char *p = alloca(16);
+    strcpy(p,"123456789012345");
+    printf("alloca: p is %s\n", p);
+    char *demo = "This is only a test.\n";
+    /* Test alloca embedded in a larger expression */
+    printf("alloca: %s\n", strcpy(alloca(strlen(demo)+1),demo) );
+#endif
+}
+
 void sizeof_test(void)
 {
     int a;

win32/include/stddef.h

@@ -18,9 +18,6 @@ typedef int int32_t;
 typedef long long int int64_t;
 #endif
 
-#ifdef __i386__
-void *_alloca(size_t);
-#define alloca _alloca
-#endif
+void *alloca(size_t);
 
 #endif