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Date: Wed, 1 Jun 1994 20:35:40 +300 (EET)
From: Alkiviadis Pervenas <pervenas AT athena DOT compulink DOT forthnet DOT gr>
Subject: -funsigned-char -Wall and C++ compilation
To: djgpp listserver <djgpp AT sun DOT soe DOT clarkson DOT edu>
Sender: pervenas AT athena DOT compulink DOT forthnet DOT gr


Is there anyone that could explain to me, why the following piece of code
when compiled as C++ (options: -x c++ -Wall -funsigned-char)
generates the warning 'comparison between promoted unsigned and signed'
but when compiled as plain C (options: -Wall -f unsigned char) does not ?

If the declaration of x is changed to 'unsigned char x' in C++, why
there is no warning? What is the difference ?

How could avoid this warning without dropping -Wall ?

    char x = ..
    ......
    if (x)       <-- warning: comparison between promoted unsigned and signed
     ......


thanks in advance,
Alkis Pervenas
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