/usr/lib/pkgconfig/mozjs185.pc is in libmozjs185-dev 1.8.5-1.0.0+dfsg-4.5.
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 | prefix=/usr
libdir=/usr/lib
includedir=/usr/include
Name: SpiderMonkey 1.8.5
Description: The Mozilla library for JavaScript 1.8.5
Version:
Requires: nspr >= 4.7
Libs: -L${libdir} -lmozjs185
Cflags: -I${includedir}/js
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