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Andrew Kryczka 09ea5d8944 Fix clang build with jemalloc (#5522) 
Summary:
Fixes the below build failure for clang compiler using glibc and jemalloc.

Platform: linux x86-64
Compiler: clang version 6.0.0-1ubuntu2
Build failure:
```
$ CXX=clang++ CC=clang USE_CLANG=1 WITH_JEMALLOC_FLAG=1 JEMALLOC=1 EXTRA_LDFLAGS="-L/home/andrew/jemalloc/lib/" EXTRA_CXXFLAGS="-I/home/andrew/jemalloc/include/" make check -j12
...
  CC       memory/jemalloc_nodump_allocator.o
In file included from memory/jemalloc_nodump_allocator.cc:6:
In file included from ./memory/jemalloc_nodump_allocator.h:11:
In file included from ./port/jemalloc_helper.h:16:
/usr/include/clang/6.0.0/include/mm_malloc.h:39:16: error: 'posix_memalign' is missing exception specification 'throw()'
extern "C" int posix_memalign(void **__memptr, size_t __alignment, size_t __size);
               ^
/home/andrew/jemalloc/include/jemalloc/jemalloc.h:388:26: note: expanded from macro 'posix_memalign'
#  define posix_memalign je_posix_memalign
                         ^
/home/andrew/jemalloc/include/jemalloc/jemalloc.h:77:29: note: expanded from macro 'je_posix_memalign'
#  define je_posix_memalign posix_memalign
                            ^
/home/andrew/jemalloc/include/jemalloc/jemalloc.h:232:38: note: previous declaration is here
JEMALLOC_EXPORT int JEMALLOC_NOTHROW    je_posix_memalign(void **memptr,
                                        ^
/home/andrew/jemalloc/include/jemalloc/jemalloc.h:77:29: note: expanded from macro 'je_posix_memalign'
#  define je_posix_memalign posix_memalign
                            ^
1 error generated.
Makefile:1972: recipe for target 'memory/jemalloc_nodump_allocator.o' failed
make: *** [memory/jemalloc_nodump_allocator.o] Error 1
```
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5522

Differential Revision: D16069869

Pulled By: miasantreble

fbshipit-source-id: c489bbc993adee194b9a550134c6237a264bc443
 		2019-07-02 13:02:12 -07:00
..
win Move some logging related files to logging/ (#5387) 2019-05-31 17:23:59 -07:00
README reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
jemalloc_helper.h Fix clang build with jemalloc (#5522) 2019-07-02 13:02:12 -07:00
likely.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
port.h Change RocksDB License 2017-07-15 16:11:23 -07:00
port_dirent.h #5145 , rename port/dirent.h to port/port_dirent.h to avoid compile err when use port dir as header dir output (#5152) 2019-04-04 11:38:19 -07:00
port_example.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
port_posix.cc Move some logging related files to logging/ (#5387) 2019-05-31 17:23:59 -07:00
port_posix.h Make adaptivity of LRU cache mutexes configurable (#5054) 2019-03-20 12:33:44 -07:00
stack_trace.cc Comment out unused variables 2018-03-05 13:13:41 -08:00
stack_trace.h Change RocksDB License 2017-07-15 16:11:23 -07:00
sys_time.h Support pragma once in all header files and cleanup some warnings (#4339) 2018-09-05 18:13:31 -07:00
util_logger.h Move some logging related files to logging/ (#5387) 2019-05-31 17:23:59 -07:00
xpress.h Change RocksDB License 2017-07-15 16:11:23 -07:00

README 

This directory contains interfaces and implementations that isolate the
rest of the package from platform details.

Code in the rest of the package includes "port.h" from this directory.
"port.h" in turn includes a platform specific "port_<platform>.h" file
that provides the platform specific implementation.

See port_posix.h for an example of what must be provided in a platform
specific header file.