(r7) CompilingOnMacOSX < FST

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---+ Compilation on !MacOS X

%ICON{led-red}% *This only applies to Tiger and Leopard. On Snow Leopard (10.6), you simply need to use the latest version of Xcode (3.2.3) that ships with gcc 4.2.*

Versions 1.0 and later of the !OpenFst library cannot be compiled on !MacOS X *(10.4 Tiger or 10.5 Leopard)* using Apple Xcode version of gcc. The reason is that Apple uses gcc 4.0 and this version of gcc has a bug in the copy constructor of TR1's =unordered_map=. This bug was [[http://gcc.gnu.org/ml/libstdc++/2005-08/msg00017.html][fixed almost 4 years ago]].

We suggest here two different workarounds: 1) using a more recent version of gcc (such as the one provided by [[http://fink.sf.net][Fink]] or [[http://www.macports.org/][MacPorts]]) or 2) manually patching the relevant include file in Apple's gcc setup.

---+++ Using gcc 4.2 from [[http://fink.sf.net][Fink]] on Leopard

If you have installed the [[http://fink.sf.net][Fink]] package manager on your mac, you can use it to install a working version of gcc 4.2.

   1. Make sure you use the [[http://fink.sourceforge.net/news/#2008-06-26%20New%20Fink%20release.][lastest version of Fink (0.9.0)]] and that =/sw/bin= was added to your =PATH= environment variable. 
   1. Install the gcc42 package <verbatim>
$ sudo apt-get install gcc42</verbatim>
   1. Compile the !OpenFst library using this version of =g++= instead of Apple's. In the =openfst-1.0= directory, do: <pre>
$ CXX=%SLASH%sw%SLASH%bin%SLASH%g++-4 ./configure
$ make -j 4
$ make check</pre>

[[http://fink.sf.net][Fink]] does not provide pre-compiled versions of gcc for !MacOS X 10.4 Tiger but you can install one from source (see [[http://fink.sf.net][Fink's website]] for more details). An other approach would be to install a working version of gcc using [[http://www.macports.org/][MacPorts]].

---+++ Patching Apple's gcc 4.0 relevant include file

You can also manually change the buggy include file in Apple's setup.

   1. Download the patched version of =tr1/hashtable= [[%ATTACHURL%/hashtable][here %ICON{download}%]]. <br> %U% *This file has been updated to fix an [[http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23053][other bug]] preventing compilation of !OpenFst 1.2 and above.* <br> The following assumes that the file was saved to =~/Downloads/hashtable=, replace that by the actual file location (note that your browser might have rename =hashtable= to =hashtable.txt=).

   1. (Optional) Check how minimal the change is: <verbatim>
$ diff  ~/Downloads/hashtable /usr/include/c++/4.0.0/tr1/hashtable</verbatim>
   1. Overwrite Apple's version with the patched version and restore file permissions and ownership: <verbatim>
$ sudo cp -f ~/Downloads/hashtable /usr/include/c++/4.0.0/tr1/hashtable
$ sudo chmod 644 /usr/include/c++/4.0.0/tr1/hashtable
$ sudo chown root:wheel /usr/include/c++/4.0.0/tr1/hashtable</verbatim>


-- Main.CyrilAllauzen - 03 Mar 2009

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
ext	hashtable	r2 r1	manage	49.0 K	2010-09-03 - 20:41	CyrilAllauzen	gcc 4.0 version of `tr1/hashtable` with fixed copy constructor and const iterator

Topic revision: r7 - 2010-09-03 - CyrilAllauzen