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OS X 10.7.5

我需要 libjpeg v8 的通用变体（jpeg @8d_0+universal），但 MacPorts 似乎坚持认为，如果我要拥有通用变体，它必须是最新版本（jpeg @9_1+universal）

我查看了 MacPorts 文档和其他资源，找到了有关如何安装旧版本以及如何安装通用版本的说明，但没有解释为什么 MacPorts 会忽略我在查找时请求的版本号一个通用的构建。

这是我所做的，以及发生了什么：

$ port installed jpeg
Warning: port definitions are more than two weeks old, consider using selfupdate
The following ports are currently installed:
  jpeg @8c_0
  jpeg @8d_0 (active)
  jpeg @9_1

$ sudo port install jpeg @8d_0 +universal
Password:
Warning: port definitions are more than two weeks old, consider using selfupdate
--->  Fetching archive for jpeg
--->  Attempting to fetch jpeg-9_1+universal.darwin_11.i386-x86_64.tbz2 from http://mse.uk.packages.macports.org/sites/packages.macports.org/jpeg
--->  Attempting to fetch jpeg-9_1+universal.darwin_11.i386-x86_64.tbz2 from http://packages.macports.org/jpeg
--->  Attempting to fetch jpeg-9_1+universal.darwin_11.i386-x86_64.tbz2 from http://lil.fr.packages.macports.org/jpeg
--->  Fetching distfiles for jpeg
--->  Attempting to fetch jpegsrc.v9.tar.gz from http://www.ijg.org/files/
--->  Verifying checksum(s) for jpeg
--->  Extracting jpeg
--->  Applying patches to jpeg
--->  Configuring jpeg
--->  Building jpeg
--->  Staging jpeg into destroot
--->  Installing jpeg @9_1+universal
--->  Deactivating jpeg @8d_0
--->  Cleaning jpeg
--->  Activating jpeg @9_1+universal
--->  Cleaning jpeg
--->  Updating database of binaries: 100.0%
--->  Scanning binaries for linking errors: 100.0%
--->  No broken files found.

$ port installed jpeg
Warning: port definitions are more than two weeks old, consider using selfupdate
The following ports are currently installed:
  jpeg @8c_0
  jpeg @8d_0
  jpeg @9_1
  jpeg @9_1+universal (active)

如果不清楚，所需的最终状态是：

jpeg @8c_0
jpeg @8d_0+universal (active)
jpeg @9_1

我尝试先卸载所有已安装的 jpeg 版本，然后重新尝试安装 jpeg @8d_0+universal，但这没有效果 - MacPorts 刚刚获取并安装了 jpeg @9_1+universal。我试过了

sudo port install jpeg @8d_0 +universal

和

sudo port install jpeg @8d_0+universal

但得到了相同的行为。

关于如何实现这一目标的任何建议？谢谢！

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