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From: jdmorgen@rational.com To: gnats-gnats@sourceware.cygnus.com Subject: gnats/165: gcc 2.95.2 preprocessor bug with -O options Date: Fri, 09 Mar 2001 17:34:00 -0000 [thread overview] Message-ID: <20010310012957.8889.qmail@sourceware.cygnus.com> (raw) >Number: 165 >Category: gnats >Synopsis: gcc 2.95.2 preprocessor bug with -O options >Confidential: no >Severity: critical >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Fri Mar 09 17:34:00 PST 2001 >Closed-Date: >Last-Modified: >Originator: J. David Morgenthaler >Release: gcc-2.95.2 >Organization: >Environment: Linux 2.2.12-20smp #1 SMP Mon Sep 27 10:34:45 EDT 1999 i686 unknown >Description: preprocessor error for gcc using -O, -O2... Does not occur with g++ or without -O Sample section of bad.i file: # 1 "bad.c" 2 void bad() { if(( __extension__ ({ size_t __s1_len, __s2_len; (__builtin_constant_p ( "mystr" ) && __builtin_constant_p ( #if defined(SOMETHING) "yourstr" ) && (__s1_len = strlen ( "mystr" ), __s2_len = strlen ( #if defined(SOMETHING) "yourstr" ), (! ((size_t)(const void *)(( "mystr" ) + 1) - (size_t)(const void *)( "mystr" ) == 1) || __s1_len >= 4) && (! ((size_t)(const void *)(( #if defined(SOMETHING) "yourstr" ) + 1) - (size_t)(const void *)( #if defined(SOMETHING) "yourstr" ) == 1) || __s2_len >= 4)) ? memcmp ((__const char *) ( "mystr" ), (__const char *) ( #if defined(SOMETHING) "yourstr" ), (__s1_len < __s2_len ? __s1_len : __s2_len) + 1) : (__builtin_constant_p ( >How-To-Repeat: gcc -O >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="bad.c" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="bad.c" I2luY2x1ZGUgPHN0cmluZy5oPgoKdm9pZCBiYWQoKQp7CiAgaWYoKCBzdHJjbXAoICJteXN0ciIs ICAgICAgICAgICAgICAgIAojaWYgZGVmaW5lZChTT01FVEhJTkcpCgkgICAgICAgInlvdXJzdHIi KSAKI2Vsc2UgCiAgICAgICAgICAgICAgICIiKSAKI2VuZGlmICAKCSE9IDAgKSApIAogICAgIDsK fQo=
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