/usr/lib/x86_64-linux-gnu/pkgconfig/libsigrokdecode.pc is in libsigrokdecode-dev 0.5.0-4.
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 12 13 14 15 16 17 18 | prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
datarootdir=${prefix}/share
datadir=${datarootdir}
pkgdatadir=${datadir}/libsigrokdecode
decodersdir=${pkgdatadir}/decoders
Name: libsigrokdecode
Description: Protocol decoder library of the sigrok logic analyzer software
URL: http://www.sigrok.org
Requires: glib-2.0
Requires.private: python3 >= 3.2
Version: 0.5.0
Libs: -L${libdir} -lsigrokdecode
Libs.private: -lm
Cflags: -I${includedir}
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