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[Bug libc/2841] New: stdint.h misdefines UINT8_C and UINT16_C to append U
- From: "eggert at gnu dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 24 Jun 2006 06:35:41 -0000
- Subject: [Bug libc/2841] New: stdint.h misdefines UINT8_C and UINT16_C to append U
- Reply-to: sourceware-bugzilla at sourceware dot org
C99 7.18.4.1 (as revised by ISO/IEC 9899:1999/Cor.1:2001) says that
UINT8_C and UINT16_C return values corresponding to uint_least8_t and
uint_least16_t. They therefore must promote the same way. But glibc
appends 'U', which causes UINT8_C and UINT16_C to promote to 'unsigned
int', not 'int'. Here is a test program illustrating the bug: it
strictly conforms to the C99 but GCC + glibc reject it. I'll attach
the obvious patch.
#include <stdint.h>
char test1[(-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1];
char test2[(-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1];
--
Summary: stdint.h misdefines UINT8_C and UINT16_C to append U
Product: glibc
Version: 2.4
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: eggert at gnu dot org
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=2841
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