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awib's Issues

No longer builds with clang 16

See also https://wiki.gentoo.org/wiki/Modern_C_porting.

In Clang/LLVM 16 the following errors are enabled by default:

-Werror=implicit-function-declaration
-Werror=implicit-int
-Werror=int-conversion
-Werror=incompatible-function-pointer-types

Building awib with CLANG 16 and presumably GCC 14 leads to the following errors.

cp awib.b awib_make_binary.c
gcc  -std=c99 awib_make_binary.c  -o awib_make_binary.bin -O2
awib_make_binary.c:522:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
^
int
awib_make_binary.c:522:5: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
    ^
int
awib_make_binary.c:522:9: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
        ^
int
awib_make_binary.c:522:13: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
            ^
int
awib_make_binary.c:522:18: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
                 ^
int
awib_make_binary.c:522:37: error: parameter '__' was not declared, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
                                    ^
awib_make_binary.c:522:35: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
_K_,_KK,__K,____,__[4>>002<<020]; _(__){__K=____?__K:__;____=__;while(
                                  ^
                                  int
awib_make_binary.c:522:35: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
awib_make_binary.c:524:30: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
+K]&1):__*__;_KK+=__;_(__);}}___(){while(K[++_KK]){    _K_('v'^']',__[
                             ^
                             int
awib_make_binary.c:525:13: warning: | has lower precedence than ==; == will be evaluated first [-Wparentheses]
,]++)_K_(055|___==___,__[,]--)_K_('K'^'u',,++)_K_('w'^'K',--,)_K_('_'^
            ^~~~~~~~~
awib_make_binary.c:521:32: note: expanded from macro '_K_'
#define _K_(___,_K,__)(K[_KK]^(___))?_K_^_K_:_K _K_ __;
                               ^~~
awib_make_binary.c:525:13: note: place parentheses around the '==' expression to silence this warning
,]++)_K_(055|___==___,__[,]--)_K_('K'^'u',,++)_K_('w'^'K',--,)_K_('_'^
            ^~~~~~~~~
awib_make_binary.c:521:32: note: expanded from macro '_K_'
#define _K_(___,_K,__)(K[_KK]^(___))?_K_^_K_:_K _K_ __;
                               ^~~
awib_make_binary.c:525:13: note: place parentheses around the | expression to evaluate it first
,]++)_K_(055|___==___,__[,]--)_K_('K'^'u',,++)_K_('w'^'K',--,)_K_('_'^
         ~~~^~~~
awib_make_binary.c:521:32: note: expanded from macro '_K_'
#define _K_(___,_K,__)(K[_KK]^(___))?_K_^_K_:_K _K_ __;
                               ^~~
awib_make_binary.c:527:40: error: call to undeclared function 'putchar'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
[K]&1)):_(0))K[_KK]-46?_(__[_K_]&1>>1):putchar(__[_K_]);if(_KK[K]^(1<<
                                       ^
awib_make_binary.c:528:26: error: call to undeclared function 'getchar'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1^'.'))_(0);else{__[_K_]=getchar();}}}main(){--_KK;___();}
                         ^
awib_make_binary.c:528:39: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
1^'.'))_(0);else{__[_K_]=getchar();}}}main(){--_KK;___();}
                                      ^
                                      int
2 warnings and 11 errors generated.
make: *** [Makefile:7: binary] Error 1

Unexpected negative array access.

This BF generates

+[>]<- [<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>-]

The below C code, notice the negative array index is accessed despite the fact that the second loop isn't run. The program mandelbrot.b has this sort of construct.
However, this doesn't actually segfault for me, but the @lang_go variant does throw the error both for my tiny example above and mandelbrot.b.

#include <stdio.h>
char    buf[0xffff];
int
main()
{
    char   *p = buf;
    int     c;
    *p += 1;
    while (*p) {
        p += 1;
    }
    p -= 1;
    *p -= 1;
    *(p - 16) += *p * 1;
    *p = 0;
    return 0;
}

awib_make_binary.bin returns 141, fails make

Because of the lack of a return() statement in the main() function, awib_make_binary.bin returns with 141, which makes GNU make exit because of failure. Adding "return(0);" to the main() function in the C part of awib.b fixes that, but this thing is so messy that I have no idea where to even start fixing it.

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