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Comment by argvzero | Hacker News Reader

Was really psyched until I saw --std=c++0x in the Makefile. What 0x features does leveldb depend on, and can those dependencies be realistically removed?

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The use of c++0x should be limited to the small AtomicPointer class in port_posix.h. The class uses <cstdatomic> for its implementation. If you can provide a different implementation of "acquire store" and "release load" for your architecture, you should be all set without the need for c++0x.

I suspect that you may find suitable code in the chromium source code. See leveldb's port_chromium.h.

I managed to get an initial patch up here:

http://code.google.com/p/leveldb/issues/detail?id=2

I suspect you need a newer version of gcc/g++ (one that supports the c++0x standard). You can probably download a later gcc package and then use that to install.

  -Jeff

On Wed, May 11, 2011 at 3:37 AM, conglin.deng <conglin.deng@aliyun-inc.com> wrote: > Hi jeff, > > > > I have checkout leveldb code from code.google.com, > > But when I run make command on the root folder, encounter a error as > below, > > > > /////////////////////////// > > [root@host]$make > > g++ -c -DLEVELDB_PLATFORM_POSIX -I. -I./include -std=c++0x -g2 > db/db_bench.cc -o db/db_bench.o > > cc1plus: error: unrecognized command line option "-std=c++0x" > > make: * [db/db_bench.o] Error 1 > > [root@host]$pwd > > /home/admin/leveldb > > [root@host]$ > > /////////////////////////// > > > > > > Would you please to tell me how to build and setup leveldb on a redhat > 5.4 env. Thanks very much! > > > > Thanks > > linc

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