/usr/lib/x86_64-linux-gnu/perl5/5.20/Gnome2/Canvas/Install/gnomecanvasperl-version.h is in libgnome2-canvas-perl 1.002-3+b1.
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 | #define GNOME_CANVAS_MAJOR_VERSION (2)
#define GNOME_CANVAS_MINOR_VERSION (30)
#define GNOME_CANVAS_MICRO_VERSION (3)
#define GNOME_CANVAS_CHECK_VERSION(major,minor,micro) \
(GNOME_CANVAS_MAJOR_VERSION > (major) || \
(GNOME_CANVAS_MAJOR_VERSION == (major) && GNOME_CANVAS_MINOR_VERSION > (minor)) || \
(GNOME_CANVAS_MAJOR_VERSION == (major) && GNOME_CANVAS_MINOR_VERSION == (minor) && GNOME_CANVAS_MICRO_VERSION >= (micro)))
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