https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43167
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-24
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.5.3, 4.8.3, 4.9.3, 5.3.0,
| |6.3.0, 7.0
--- Comment #15 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can confirm that the warnings are still suppressed in GCC 7.0:
Without -Wsystem-headers:
$ /build/gcc-git/gcc/xg++ -B /build/gcc-git/gcc -nostdinc++ -I
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include -I
/src/gcc/git/libstdc++-v3/libsupc++ -I
/src/gcc/git/libstdc++-v3/include/backward -I
/src/gcc/git/libstdc++-v3/testsuite/util -L
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -S -Wall -Wextra
-Wpedantic -Wconversion t.C
$
With -Wsystem-headers:
$ /build/gcc-git/gcc/xg++ -B /build/gcc-git/gcc -nostdinc++ -I
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include -I
/src/gcc/git/libstdc++-v3/libsupc++ -I
/src/gcc/git/libstdc++-v3/include/backward -I
/src/gcc/git/libstdc++-v3/testsuite/util -L
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -S -Wall -Wextra
-Wpedantic -Wconversion -Wsystem-headers t.C
In file included from /usr/include/inttypes.h:27:0,
from t.C:4:
/build/gcc-git/gcc/include/stdint.h:9:3: warning: #include_next is a GCC
extension
# include_next <stdint.h>
^~~~~~~~~~~~
In file included from
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/vector:60:0,
from t.C:2:
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h: In
function ‘constexpr int std::__lg(int)’:
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:1001:44:
warning: conversion to ‘int’ from ‘long unsigned int’ may alter its value
-Wconversion]
{ return sizeof(int) * __CHAR_BIT__ - 1 - __builtin_clz(__n); }
^
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h: In
function ‘constexpr unsigned int std::__lg(unsigned int)’:
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:1005:44:
warning: conversion to ‘unsigned int’ from ‘long unsigned int’ may alter its
value [-Wconversion]
{ return sizeof(int) * __CHAR_BIT__ - 1 - __builtin_clz(__n); }
^
In file included from
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/numeric:62:0,
from t.C:3:
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_numeric.h: In
instantiation of ‘_Tp std::accumulate(_InputIterator, _InputIterator, _Tp)
[with _InputIterator = __gnu_cxx::__normal_iterator<const long int*,
std::vector<long int> >; _Tp = int]’:
t.C:7:57: required from here
/build/gcc-git/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_numeric.h:127:18:
warning: conversion to ‘int’ from ‘long int’ may alter its value [-Wconversion]
__init = __init + *__first;
^
