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我在安裝依賴於另一個程序包的程序包時遇到問題 - poppler-glib。我安裝了poppler-glib（最新版本），其前綴爲/home/user/local/poppler-glib，*.pc文件存在於/home/user/local/poppler-glib/lib/pkgconfig中。我已經添加了這條道路的PKG_CONFIG_PATH變量（我在tcsh）：調整PKG_CONFIG_PATH不起作用
setenv PKG_CONFIG_PATH /home/user/local/poppler-glib/lib/pkgconfig
然而，當我嘗試運行其他包裝./configure腳本，我收到以下錯誤：
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，問題：如何調整PKG_CONFIG_PATH變量以使其可見？