Hi, Just a minor thing, but I hit this problem times to times, I know the CPP preprocessor has no warning like "end of line ignored"... GCC-3.3.5 and 3.4.3.
[EMAIL PROTECTED]:~/projet$ cat > tmp.c #define OPTION1 0x0001 #define OPTION2 0x0002 #define OPTION3 0x0004 #define OPTION4 0x0008 #define CONFIGURATION (OPTION1 | OPTION3) #if CONFIGURATION & OPTION1 #warning OPTION1 set #endif #if CONFIGURATION & OPTION2 #warning OPTION2 set #endif #if CONFIGURATION & OPTION3 #warning OPTION3 set #endif #if CONFIGURATION & OPTION4 #warning OPTION4 set #endif #if !(CONFIGURATION & OPTION2) #warning OPTION2 unset #endif #if (CONFIGURATION & OPTION2) == 0 #warning OPTION2 unset #endif // There is the problem: the "== 0" is ignored #if CONFIGURATION & OPTION2 == 0 #warning OPTION2 unset #else #warning OPTION2 set #endif [EMAIL PROTECTED]:~/projet$ gcc -E tmp.c # 1 "tmp.c" # 1 "<built-in>" # 1 "<command line>" # 1 "tmp.c" tmp.c:9:2: warning: #warning OPTION1 set tmp.c:17:2: warning: #warning OPTION3 set tmp.c:25:2: warning: #warning OPTION2 unset tmp.c:29:2: warning: #warning OPTION2 unset tmp.c:36:2: warning: #warning OPTION2 set Etienne. __________________________________________________________________ Découvrez le nouveau Yahoo! Mail : 250 Mo d'espace de stockage pour vos mails ! Créez votre Yahoo! Mail sur http://fr.mail.yahoo.com/