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From: Amit <amitchoudhary0523@gmail.com>
Date: Thu, 13 Jan 2022 20:03:52 +0530
Message-ID: <CAFf+5ziAh0X9cujnRMiSS0bcZWoZX7wi4aaAb2n1k0rLDf=3xQ@mail.gmail.com>
Subject: -Wsign-conversion flag in gcc in cygwin.
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Hi,

When I compile "long x = strlen("abcde")" on a linux system with the
following gcc flags -Wall -Wconversion, I get the following warning:

==============================
size.c: In function ‘main’:
size.c:7:17: warning: conversion to ‘long int’ from ‘size_t’ may
change the sign of the result [-Wsign-conversion]
  long x = strlen("abcde");
                 ^
==============================

But on cygwin, I don't get this warning.

So, is -Wsign-conversion flag not implemented in gcc in cygwin?

--------------------------------------------------------------
$ gcc --version
gcc (GCC) 11.2.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -dumpmachine
x86_64-pc-cygwin
--------------------------------------------------------------

Amit

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