http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60097
Bug ID: 60097
Summary: spurious warning about command line option
"-Wno-mismatched-tags"
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dan at math dot uiuc.edu
int x;
char y;
void f () { y=x; }
/*
compile with
g++ -c -Wconversion -Wno-mismatched-tags
get this:
foo.cc: In function 'void f()':
foo.cc:3:14: warning: conversion to 'char' from 'int' may alter its value
[-Wconversion]
void f () { y=x; }
^
At global scope:
cc1plus: warning: unrecognized command line option "-Wno-mismatched-tags"
[enabled by default]
the warning about -Wno-mismatched-tags is false, because it is not issued when
compiling with
g++ -c -Wno-mismatched-tags
info:
happens under Mac OS X with the compiler below, and also under Ubuntu
with an older compiler
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc48/4.8.2/libexec/gcc/x86_64-apple-darwin13.0.2/4.8.2/lto-wrapper
Target: x86_64-apple-darwin13.0.2
Configured with: ../configure --build=x86_64-apple-darwin13.0.2
--prefix=/usr/local/Cellar/gcc48/4.8.2 --enable-languages=c,c++,objc,obj-c++
--program-suffix=-4.8 --with-gmp=/usr/local/opt/gmp4
--with-mpfr=/usr/local/opt/mpfr2 --with-mpc=/usr/local/opt/libmpc08
--with-cloog=/usr/local/opt/cloog018 --with-isl=/usr/local/opt/isl011
--with-system-zlib --enable-version-specific-runtime-libs
--enable-libstdcxx-time=yes --enable-stage1-checking --enable-checking=release
--enable-lto --disable-werror --enable-plugin --disable-nls --disable-multilib
Thread model: posix
gcc version 4.8.2 (GCC)
*/
