/usr/lib/pkgconfig/quickfix.pc is in libquickfix-dev 1.13.3+dfsg-9ubuntu2.
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=/usr
libdir=/usr/lib
includedir=/usr/include
Name: QuickFIX
Description: FIX Engine
Version: 1.13.3
Requires: libxml-2.0
Libs: -L${libdir} -lquickfix
Cflags: -I${includedir}
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