Package: tcc Version: 0.9.23-4.kon.1 Severity: normal gcc-4.0 4.0.3-3 compiles this program all right, but tcc fails: sizeof.c:5: pointer expected
int
main (void)
{
char x[1];
return (sizeof (x) [0]) - 1;
}
tcc 0.9.23-4.kon.1 is 0.9.23-4 + the patch from bug 418360.
/* C99 6.5.3p1 */
unary-expression:
postfix-expression
++ unary-expression
-- unary-expression
unary-operator cast-expression
sizeof unary-expression
sizeof (type-name)
/* C99 6.5.2p1 */
postfix-expression:
primary-expression
postfix-expression [ expression ]
postfix-expression ( argument-expression-list_opt )
postfix-expression . identifier
postfix-expression -> identifier
postfix-expression ++
postfix-expression --
( type-name ) { initializer-list }
( type-name ) { initializer-list , }
/* C99 6.5.1p1 */
primary-expression:
identifier
constant
string-literal
( expression )
"sizeof (x)" can be a unary-expression but cannot be a
postfix-expression, and therefore it cannot be the left side in
the "postfix-expression [ expression ]" syntax. So TCC is wrong.
"(x)[0]" can be a postfix-expression and thus a unary-expression,
making it a suitable argument for sizeof. So GCC is right.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1,
'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/dash
Kernel: Linux 2.6.12-1-k7
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages tcc depends on:
ii libc6 2.3.6-7 GNU C Library: Shared libraries
Versions of packages tcc recommends:
ii libc6-dev [libc-dev] 2.3.6-7 GNU C Library: Development Librari
-- no debconf information
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