安装软件时出现以下的问题。请教这类的错误高手是如何看，怎样解决？

checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... configure: error: newly created file is older than distributed files!
Check your system clock

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/media-libs/jpeg-7/work/jpeg-7/config.log
*
* ERROR: media-libs/jpeg-7 failed.
* Call stack:
* ebuild.sh, line 49: Called src_configure
* environment, line 2537: Called econf '--disable-dependency-tracking' '--enable-shared' '--enable-static' '--enable-maxmem=64'
* ebuild.sh, line 534: Called die
* The specific snippet of code:
* die "econf failed"
* The die message:
* econf failed
*
* If you need support, post the topmost build error, and the call stack if relevant.
* A complete build log is located at '/var/tmp/portage/media-libs/jpeg-7/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/media-libs/jpeg-7/temp/environment'.
*

>>> Failed to emerge media-libs/jpeg-7, Log file:

>>> '/var/tmp/portage/media-libs/jpeg-7/temp/build.log'

* Messages for package media-libs/jpeg-7:

*
* ERROR: media-libs/jpeg-7 failed.
* Call stack:
* ebuild.sh, line 49: Called src_configure
* environment, line 2537: Called econf '--disable-dependency-tracking' '--enable-shared' '--enable-static' '--enable-maxmem=64'
* ebuild.sh, line 534: Called die
* The specific snippet of code:
* die "econf failed"
* The die message:
* econf failed
*
* If you need support, post the topmost build error, and the call stack if relevant.
* A complete build log is located at '/var/tmp/portage/media-libs/jpeg-7/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/media-libs/jpeg-7/temp/environment'.
*

* IMPORTANT: 1 news items need reading for repository 'gentoo'.
* Use eselect news to read news items.

我这样理解正确吗？checking for a BSD-compatible install... /usr/bin/install -c
出问题。checking whether build environment is sane... configure: error: newly created file is older than distributed files!
Check your system clock

这段文字是解决问题吗？

對頭。。。參看gentoo安裝手冊，確認你的系统時鐘