运行 ./configure for vlc 时找不到 libavcodec
我正在尝试在 ubuntu 10.04 上为 vlc 运行“./configure”。但由于某种原因它找不到 libavcode 库。我检查了/usr/lib，它有库，为什么./configure找不到它？
这是来自“./configure”的错误：
checking for AVCODEC... no
configure: error: Could not find libavcodec or libavutil. Use --disable-avcodec to ignore this error.
但我已经安装了 libavcodec-dev，但它仍然失败：
$ sudo apt-get install libavcodec-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libavcodec-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 201 not upgraded.
我已经检查了“/usr/lib”，我看到了 libavcodec.so：
-rw-r--r-- 1 root root 7339558 2010-03-04 04:42 libavcodec.a
lrwxrwxrwx 1 root root 21 2010-06-26 00:38 libavcodec.so -> libavcodec.so.52.20.1
lrwxrwxrwx 1 root root 21 2010-05-10 22:30 libavcodec.so.52 -> libavcodec.so.52.20.1
-rw-r--r-- 1 root root 5560152 2010-03-04 04:54 libavcodec.so.52.20.1
-rw-r--r-- 1 root root 1316312 2010-03-04 04:42 libavformat.a
lrwxrwxrwx 1 root root 22 2010-06-26 00:38 libavformat.so -> libavformat.so.52.31.0
lrwxrwxrwx 1 root root 22 2010-05-10 22:30 libavformat.so.52 -> libavformat.so.52.31.0
-rw-r--r-- 1 root root 694880 2010-03-04 04:42 libavformat.so.52.31.0
-rw-r--r-- 1 root root 85164 2010-03-04 04:42 libavutil.a
lrwxrwxrwx 1 root root 20 2010-06-26 00:38 libavutil.so -> libavutil.so.49.15.0
lrwxrwxrwx 1 root root 20 2010-05-10 22:30 libavutil.so.49 -> libavutil.so.49.15.0
-rw-r--r-- 1 root root 47296 2010-03-04 04:54 libavutil.so.49.15.0
谢谢您的帮助。
I am trying to run './configure' for vlc on ubuntu 10.04. But it can't find libavcode libraries for some reason. I have check /usr/lib, it has the libraries, why ./configure can't find it?
This is the error from './configure':
checking for AVCODEC... no
configure: error: Could not find libavcodec or libavutil. Use --disable-avcodec to ignore this error.
But I already install libavcodec-dev, but it still fails:
$ sudo apt-get install libavcodec-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libavcodec-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 201 not upgraded.
I have checked '/usr/lib', I see the libavcodec.so:
-rw-r--r-- 1 root root 7339558 2010-03-04 04:42 libavcodec.a
lrwxrwxrwx 1 root root 21 2010-06-26 00:38 libavcodec.so -> libavcodec.so.52.20.1
lrwxrwxrwx 1 root root 21 2010-05-10 22:30 libavcodec.so.52 -> libavcodec.so.52.20.1
-rw-r--r-- 1 root root 5560152 2010-03-04 04:54 libavcodec.so.52.20.1
-rw-r--r-- 1 root root 1316312 2010-03-04 04:42 libavformat.a
lrwxrwxrwx 1 root root 22 2010-06-26 00:38 libavformat.so -> libavformat.so.52.31.0
lrwxrwxrwx 1 root root 22 2010-05-10 22:30 libavformat.so.52 -> libavformat.so.52.31.0
-rw-r--r-- 1 root root 694880 2010-03-04 04:42 libavformat.so.52.31.0
-rw-r--r-- 1 root root 85164 2010-03-04 04:42 libavutil.a
lrwxrwxrwx 1 root root 20 2010-06-26 00:38 libavutil.so -> libavutil.so.49.15.0
lrwxrwxrwx 1 root root 20 2010-05-10 22:30 libavutil.so.49 -> libavutil.so.49.15.0
-rw-r--r-- 1 root root 47296 2010-03-04 04:54 libavutil.so.49.15.0
Thank you for any help.
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评论（3）
apt-get build-dep vlc...应该清除大部分（如果不是全部）vlc ./configure 缺少依赖项的错误
apt-get build-dep vlc...should clear up most if not all vlc ./configure errors with missing dependencies
检查configure.log
也许它会给你一些关于缺少什么的提示。它可以是头文件而不是库。
Check the configure.log
May be it will give you a hint about what is missing. It can be a header file instead of a library.
默认情况下，libavcodec 安装到 /usr/lib，而 vlc 默认安装到 /usr/local/lib。在 vlc 中，将 --prefix=/usr 添加到配置行将解决此问题。
李勇
By default, libavcodec is installed to /usr/lib while vlc defaults to /usr/local/lib. In vlc, add --prefix=/usr to the configure line will fix this.
Liyong