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Windows Build: lib/regex.c warnings, "free" calls
From: |
Conrad T. Pino |
Subject: |
Windows Build: lib/regex.c warnings, "free" calls |
Date: |
Sun, 4 Apr 2004 18:04:30 -0700 |
Line 4260: FREE_VARIABLES ();
ccvs 1.12\lib\regex.c(4260) : warning C4090: 'function' : different 'const'
qualifiers
ccvs 1.12\lib\regex.c(4260) : warning C4022: 'free' : pointer mismatch for
actual parameter 1
repeats an additional 6 times for line 4260
The same warning sequence repeats for lines: 4277, 4434, 4450, 4508, 5743
which are all the same as line 4260.
It looks like a finicky VC 6.0 which is illustrated by the following:
int main(int argc, char* argv[])
{
const char **buffer;
buffer = malloc( 256 );
free( buffer );
return 0;
}
which gives warnings of:
test.c(5): warning C4090: 'function' : different 'const' qualifiers
test.c(5): warning C4022: 'free' : pointer mismatch for actual parameter 1
The warning is triggered by the "const" qualifier in the declaration which
seems like a lame warning to me. I'd like to see these warnings suppressed
and I see three options to address them.
====================
Option 0: Nothing
Do nothing to the code other than add comments that warnings are expected.
====================
Option 1: Usage #pragma
The warnings can be disabled in VC 6.0 with:
#pragma warning( disable: 4022 4090 )
but it's not portable to other compilers and would suppress the warnings
in later code where we might want to see them.
====================
Option 2: Modify macros
In the file "FREE_VARIABLES" is a macro that invokes other macros that
resolve to calls to "free". The final macros can be modified to include
a (void *) cast that would suppress the warnings but only for the specific
cases where we don't want the warnings.
====================
Question 1: Should the warnings be suppressed?
Question 2: If yes, using Option 1 or Option 2?
====================
TIA,
Conrad Pino
- Windows Build: lib/regex.c warnings, "free" calls,
Conrad T. Pino <=
- RE: Windows Build: lib/regex.c warnings, "free" calls, Conrad T. Pino, 2004/04/04
- Re: Windows Build: lib/regex.c warnings, "free" calls, Derek Robert Price, 2004/04/05
- RE: Windows Build: lib/regex.c warnings, "free" calls, Conrad T. Pino, 2004/04/06
- Re: Windows Build: lib/regex.c warnings, "free" calls, Derek Robert Price, 2004/04/06
- RE: Windows Build: lib/regex.c warnings, "free" calls, Conrad T. Pino, 2004/04/06
- Re: Windows Build: lib/regex.c warnings, "free" calls, Derek Robert Price, 2004/04/07
- RE: Windows Build: lib/regex.c warnings, "free" calls, Conrad T. Pino, 2004/04/07
- Re: Windows Build: lib/regex.c warnings, "free" calls, Derek Robert Price, 2004/04/07
- Re: Windows Build: lib/regex.c warnings, "free" calls, Larry Jones, 2004/04/07
- RE: Windows Build: lib/regex.c warnings, "free" calls, Conrad T. Pino, 2004/04/07