x86_64 "limited range of datatype" warning

Mazr has asked for the wisdom of the Perl Monks concerning the following question:

When I compile Perl on x86_64 Linux I get numerous gcc "limited range of datatype" warnings that show up as:

regexec.c: In function `S_regtry':
regexec.c:2166: warning: comparison is always false due to limited ran
+ge of data type
regexec.c:2168: warning: comparison is always false due to limited ran
+ge of data type
[download]

I get this when I compile the 5.8.7 source tarball and Red Hat's 5.8.5 SRPM. My questions are:

is there anyway to fix these comparisons?
if not, are these warnings something to be concerned about?
if yes, is Perl recommended on x86_64, or not really?

Thanks,
John

Comment on x86_64 "limited range of datatype" warning Download Code

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Re: x86_64 "limited range of datatype" warning by dave_the_m (Monsignor) on Apr 02, 2006 at 17:00 UTC
1. is there anyway to fix these comparisons? Not easily. 2. if not, are these warnings something to be concerned about? No, they are harmless. 3. if yes, is Perl recommended on x86_64, or not really? Perl is fine on that platform. It's currently my main platform for developing perl. Dave.	[reply]
Re^2: x86_64 "limited range of datatype" warning by Mazr (Initiate) on Apr 02, 2006 at 19:56 UTC
Thanks for the quick reply. John	[reply]