/usr/lib/x86_64-linux-gnu/wine-development/libwindowscodecsext.def is in libwine-development-dev 1.9.6-1.
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 | ; File generated automatically from ./dlls/windowscodecsext/windowscodecsext.spec; do not edit!
LIBRARY windowscodecsext.dll
EXPORTS
DllGetClassObject @1 PRIVATE
IWICColorTransform_Initialize_Proxy=IWICColorTransform_Initialize_Proxy_W @2
WICCreateColorTransform_Proxy @3
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