[SOLVED] x264 cannot find yasm

yzhang738@hotmail.com · 11-21-2010, 12:16 AM

I got a strange problem. I tried to install x264. When run sudo ./configure --enable-shared, it gave:
Found no assembler
Minimum version is yasm-0.6.2

But I already installed yasm-1.0.1. Why can it not find yasm?

H_TeXMeX_H · 11-21-2010, 06:16 AM

How did you install yasm ? Where ? What distro ?

It should be installed in /usr/lib or /usr/lib64.

I'm guessing this is a 64-bit system where it uses yasm, right ?

Andrew Benton · 11-21-2010, 06:19 PM

Are you sure yasm is installed? What does it reply if you run the command:

Code:

yasm --version

yzhang738@hotmail.com · 11-22-2010, 12:36 AM

I installed yasm in /usr/local/src because x264 is also installed there. libyasm.a is in /usr/local/lib. The linux system is centOS 5.5 x86_64. yasm version is 1.0.1.

yzhang738@hotmail.com · 11-22-2010, 12:39 AM

I installed yasm as:
cd /usr/local/src/
wget http://www.tortall.net/projects/yasm...m-1.0.1.tar.gz
tar zfvx yasm-1.0.1.tar.gz
cd yasm-1.0.1
./configure
make && make install

H_TeXMeX_H · 11-22-2010, 04:33 AM

Install it to '/usr/lib' using './configure --prefix=/usr' then make, make install. Or for 64-bit: './configure --prefix=/usr --libdir=/usr/lib64' if libs are in lib64 and not lib like in some distros.

brianL · 11-22-2010, 05:03 AM

If you're running Ubuntu, why didn't you do:

Code:

sudo apt-get install yasm

?

yzhang738@hotmail.com · 11-23-2010, 12:59 AM

I do not install yasm on ubuntu. However, I am not sure what apt-get does. It seems that installation on Ubuntu always use apt-get. I think it is a rpm. Can you expain what is difference between installation from source and that from apt-get? Thanks.

mac.tieu · 11-23-2010, 01:11 AM

YASM is compiler which x264 use to compile assembler files (just like using 'gcc' to compile '.c' files). All you need to do is compile yasm source code then copy 'yasm' program to directory which in $PATH (/usr/bin,...) then configure x264 again.

Cheers,
MT

yzhang738@hotmail.com · 11-23-2010, 01:33 AM

Thanks a lot, H_TeXMeX_H. It is working after install yasm to /usr/lib64.
But on another machine, even I install yasm to /usr/local/lib, ffmpeg still can find yasm. Both are centos x86_64. Why is that?

rylan76 · 11-23-2010, 03:01 AM

Maybe FFMPeg is using a different configure script that looks for yasm in a different location than x264?

If you can find where FFMPeg is looking, (check configure.log, I think) you can probably just put a symlink there to where every yasm actually is. Or you can put the path to yasm into your system PATH variable.

jschiwal · 11-23-2010, 03:15 AM

You are talking about a single directory. When you build a project, the default install base (a.k.a. prefix) directory is usually /usr/local/.
Did you use a "--prefix=" argument when you ran "./configure"?

from the tar ./configure --help output, for example:

Code:

By default, `make install' will install all the files in
`/usr/local/bin', `/usr/local/lib' etc.  You can specify
an installation prefix other than `/usr/local' using `--prefix',

If you didn't change the prefix, then /usr/local/bin is where the program is and /usr/local/lib or /usr/local/lib64 is where the libraries are.
You will need to add /usr/local/bin/ to your $PATH variable in your ~/.profile script. You will also need to add /usr/local/lib (or /usr/local/lib64) to the /etc/ld.so.conf file and then run "sudo /sbin/ldconfig".

brianL · 11-23-2010, 05:04 AM

Quote:

Originally Posted by yzhang738@hotmail.com

I do not install yasm on ubuntu. However, I am not sure what apt-get does. It seems that installation on Ubuntu always use apt-get. I think it is a rpm. Can you expain what is difference between installation from source and that from apt-get? Thanks.

I mentioned Ubuntu, because you've got its logo in your profile. Apt-get is its CLI package-manager, it downloads and installs ready made packages.

H_TeXMeX_H · 11-23-2010, 06:16 AM

Libs installed in /usr/local/lib are not always found by configure scripts, even if this directory is in /etc/ld.so.conf. I don't know why, but suspect that the configure script is dumb. I always install libs to /usr (lib or lib64 depending on distro).