What steps will reproduce the problem?
1. Compile malloc_hook_mmap_linux.h with clang, where CXXFLAGS contains
-std=c++11 -m32 -D_FILE_OFFSET_BITS=64
2.
3.
What is the expected output? What do you see instead?
The file should compile normally, instead, the following diagnostic is issued
by clang:
gperftools-2.2/src/malloc_hook_mmap_linux.h:108:23: error:
non-constant-expression cannot be narrowed from type 'off_t' (aka 'long long') to 'int32'
(aka 'int') in initializer list [-Wc++11-narrowing]
(off_t) offset };
^~~~~~~~~~~~~~
src/third_party/gperftools-2.2/src/malloc_hook_mmap_linux.h:108:23: note:
insert an explicit cast
to silence this issue
(off_t) offset };
^~~~~~~~~~~~~~
static_cast<int32>( )
1 error generated.
What version of the product are you using? On what operating system?
gperftools-2.2 on linux, as vendored into mongodb. Please see
https://jira.mongodb.org/browse/SERVER-17447 for additional motivation.
In particular, this comment:
https://jira.mongodb.org/browse/SERVER-17447?focusedCommentId=842439&page=com.at
lassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-842439
The file appears to be unchanged between gperftools-2.2 and gperftools-2.4.
Please provide any additional information below.
> clang --version
Ubuntu clang version 3.5.0-4ubuntu2 (tags/RELEASE_350/final) (based on LLVM
3.5.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
> uname -a
Linux workstation 3.16.0-34-generic #47-Ubuntu SMP Fri Apr 10 18:02:58 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
Original issue reported on code.google.com by andrew.m...@10gen.com on 22 Apr 2015 at 10:09
Original issue reported on code.google.com by
andrew.m...@10gen.comon 22 Apr 2015 at 10:09