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function [s, t, tobj] = cs_must_compile (srcdir, f, suffix, obj, hfile, force)
%CS_MUST_COMPILE return 1 if source code f must be compiled, 0 otherwise
% Used by cs_make, and MATLAB/Test/cs_test_make.m.
%
% Example:
% none, not meant for end users.
% See also: CS_MAKE.
% Copyright 2006-2012, Timothy A. Davis, http://www.suitesparse.com
dobj = dir ([f obj]) ;
if (force | isempty (dobj)) %#ok
s = 1 ;
t = Inf ;
tobj = -1 ;
return
end
dsrc = dir ([srcdir f suffix '.c']) ;
dh = dir (hfile) ;
t = max (datenum (dsrc.date), datenum (dh.date)) ;
tobj = datenum (dobj.date) ;
s = (tobj < t) ;
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