/usr/lib/x86_64-linux-gnu/pkgconfig/sunpinyin-2.0.pc is in libsunpinyin-dev 3.0.0~git20160910-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | prefix=/usr
exec_prefix=${prefix}
libdir=/usr/lib/x86_64-linux-gnu/
includedir=${exec_prefix}/include/sunpinyin-2.0
Name: libsunpinyin
Description: IME library based on Statistical Language Model
Version: 2.0.4
Requires: sqlite3
Libs: -L${libdir} -lsunpinyin
Cflags: -I${includedir} -I${includedir}/ime-core -I${includedir}/pinyin -I${includedir}/lexicon -I${includedir}/slm -I${includedir}/slm/tslminfo -I${includedir}/slm/slmprune -I${includedir}/slm/slminfo -I${includedir}/slm/slmbuild -I${includedir}/slm/thread -I${includedir}/slm/getwordfreq -I${includedir}/slm/tslmendian -I${includedir}/slm/tools -I${includedir}/slm/slmpack -I${includedir}/slm/mmseg -I${includedir}/slm/ids2ngram -I${includedir}/slm/slmseg
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