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AC_DEFUN([DOVECOT_WANT_ZSTD], [
have_zstd=no
AS_IF([test $want_zstd = yes], [
PKG_CHECK_MODULES([ZSTD], [libzstd], [have_zstd=yes], [AC_MSG_ERROR([libzstd not found])])
], [AS_IF([test $want_zstd != no], [
PKG_CHECK_MODULES([ZSTD], [libzstd], [have_zstd=yes], [have_zstd=no])
])
])
AS_IF([test $have_zstd = yes], [
have_compress_lib=yes
COMPRESS_LIBS="$COMPRESS_LIBS $ZSTD_LIBS"
AC_DEFINE([HAVE_ZSTD], [], [Define if you have ZSTD library])
AC_CHECK_DECLS([ZSTD_error_parameter_unsupported, ZSTD_minCLevel], [], [], [[#include <zstd_errors.h>]])
AC_CHECK_LIB([zstd], [ZSTD_getErrorCode], [
AC_DEFINE([HAVE_ZSTD_GETERRORCODE], [1], [Whether zstd has ZSTD_getErrorCode])
], [])
])
AM_CONDITIONAL([BUILD_ZSTD], test "$have_zstd" = "yes")
])
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