[gcc 4.1.1] -O2 warning: std::temporary_buffer dereferences type-punned pointer
-------------------------------------------------------------------------------
Key: STDCXX-350
URL: https://issues.apache.org/jira/browse/STDCXX-350
Project: C++ Standard Library
Issue Type: Bug
Components: 20. General Utilities
Affects Versions: 4.1.3, 4.1.4
Environment: gcc 4.1.1 -O2, Solaris 10
Reporter: Martin Sebor
Compiling the following program with gcc 4.1.1 on Solaris 10 produces the
warning below:
$ cat t.cpp && gmake -r t
#include <memory>
int main ()
{
std::get_temporary_buffer<int>(1);
}
gcc -c -I/amd/devco/sebor/stdcxx/include/ansi -pthreads
-I/amd/devco/sebor/stdcxx/include -I/build/sebor/gcc-4.1.1-12d/include
-I/amd/devco/sebor/stdcxx/examples/include -pedantic -nostdinc++ -O2 -W -Wall
-Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long t.cpp
/amd/devco/sebor/stdcxx/include/rw/_rawiter.h: In function 'std::pair<_TypeT*,
_Distance> std::get_temporary_buffer(_Distance, _TypeT*) [with _TypeT = int,
_Distance = int]':
/amd/devco/sebor/stdcxx/include/rw/_rawiter.h:146: instantiated from
'std::pair<_TypeT*, int> std::get_temporary_buffer(int) [with _TypeT = int]'
t.cpp:5: instantiated from here
/amd/devco/sebor/stdcxx/include/rw/_rawiter.h:131: warning: dereferencing
type-punned pointer will break strict-aliasing rules
gcc t.o -o t -pthreads -L/build/sebor/gcc-4.1.1-12d/lib -lstd12d
-Wl,-R/build/sebor/gcc-4.1.1-12d/lib -lsupc++ -lm
rm t.o
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
