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我在安装依赖于另一个程序包的程序包时遇到问题 - poppler-glib。我安装了poppler-glib（最新版本），其前缀为/home/user/local/poppler-glib，*.pc文件存在于/home/user/local/poppler-glib/lib/pkgconfig中。我已经添加了这条道路的PKG_CONFIG_PATH变量（我在tcsh）：调整PKG_CONFIG_PATH不起作用
setenv PKG_CONFIG_PATH /home/user/local/poppler-glib/lib/pkgconfig
然而，当我尝试运行其他包装./configure脚本，我收到以下错误：
configure: error: Package requirements (poppler-glib >= 0.5.4) were not met:
No package 'poppler-glib' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables POPPLERGLIB_CFLAGS
and POPPLERGLIB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
因此，问题：如何调整PKG_CONFIG_PATH变量以使其可见？