配置安装路径:prefix = [PREFIX]尚未完全了解 [英] Configuring install path: prefix=[PREFIX] not fully understood

问题描述

我认为这只是一个通用的c ++问题:

I think this is simply a general c++ question:

我正在尝试使用gnu c ++编译器在Linux Fedora上编译ffmpeg的本地版本.我在下面的一堆文件夹中有源代码:

I'm attempting to compile a local version of ffmpeg on Linux Fedora using the gnu c++ compiler. I have source code in a bunch of folders under:

~/<username>/Downloads/Code/ffmpeg_sources/

这是我尝试设置配置标志的位置，以将构建版本安装到不在此树下的目标中，而是安装在具有本地共享库的根目录下:

which is where I'm attempting to set the config flags to install the build to a target not under this tree but at a root level directory with local shared libraries:

/usr/local/

配置文件开头附近有以下部分:

There is this following section near the beginning of the configuration file:

Standard options:

 --prefix=PREFIX          install in PREFIX []
 --bindir=DIR             install binaries in DIR [PREFIX/bin]
 --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
 --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
 --libdir=DIR             install libs in DIR [PREFIX/lib]
 --shlibdir=DIR           install shared libs in DIR [PREFIX/lib]
 --incdir=DIR             install includes in DIR [PREFIX/include]
 --mandir=DIR             install man page in DIR [PREFIX/share/man]
 --enable-rpath           use rpath to allow installing libraries in paths
                          not part of the dynamic linker search path

我可能完全误解了这一点，但我认为将值设置为

I may have completely misunderstood this, but I thought that setting a value like

--prefix=/usr/local

或

--prefix=[/usr/local]

可能会工作，但似乎无法完成，因为./config中的make& make安装完成后，它已经完成了很多工作，但目标没有安装任何东西.在源目录中构建了很多新的可执行文件，因此大概可以构建，但是我只是错误地指定了路径?相同问题的一部分在于，一旦设置了

might work, but it appears not to, as once the ./config, make&&make install is complete, it has done a bunch of stuff but there's nothing installed at the target. There are a LOT of new executable files built in the source directory, so presumably the build is working but I'm simply specifying the paths incorrectly? A part of the same problem is that it's unclear whether, once I've set the

--prefix=[PREFIX]

正确，我需要再设置所有

correctly, I need to set all of the further

--datadir, --libdir

等还是第一个--prefix值足够?

etc. or whether the first --prefix value is enough?

上面的配置语法试图告诉我什么?

What is the above configuration syntax trying to show me?

推荐答案

它应该是第一个--prefix=/usr/local，但是要在该位置安装文件，您需要 root 权限.因此，如果您是sudo user又名sudo make install，则需要更改为 root 帐户su或使用sudo.仅在 install 阶段这样做，不要那样构建.

It should be the first one --prefix=/usr/local but to install files in that location you need root privileges. So you need to either change to the root account su or use sudo if you are a sudo user aka sudo make install. Only do that for the install phase, don't build like that.

此外，/usr/local通常是默认的安装位置，因此通常不需要指定该位置.通常，您只使用--prefix安装到其他位置，例如--prefix=/opt或 home 文件夹:--prefix=$HOME/3rdparty.

Also /usr/local is usually the default install location so you don't usually need to specify that. Normally you only use --prefix to install into a different location like --prefix=/opt or your home folders: --prefix=$HOME/3rdparty.

顺便说一句，如果安装到 home 文件夹中，则不需要 root 特权.

Incidentally, if you install into your home folder you won't need root privileges.

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