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.Dd January 15, 2017
.Dt ZLIBVERSION 3
.Os
.
.Sh NAME
.Nm zlibVersion
.Nd check zlib version
.
.Sh LIBRARY
.Lb libz
.
.Sh SYNOPSIS
.In zlib.h
.Fd #define ZLIB_VERSION \(dq1.2.11\(dq
.Ft "const char *"
.Fn zlibVersion void
.
.Sh DESCRIPTION
The application can compare
.Fn zlibVersion
and
.Dv ZLIB_VERSION
for consistency.
If the first character differs,
the library code actually used
is not compatible with the
.In zlib.h
header file used by the application.
This check is automatically made by
.Xr deflateInit 3
and
.Xr inflateInit 3 .
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