AC_MSG_CHECKING([for static linking of openSSL libraries])
	AC_MSG_RESULT([$TCLEXT_TLS_STATIC_SSL])


	dnl Set SSL files root path
	AC_ARG_WITH([openssl-dir],
		AS_HELP_STRING([--with-openssl-dir=<dir>],
			[path to root directory of OpenSSL or LibreSSL installation]
		), [
			openssldir="$withval"
		], [
			openssldir=''
		]
	)
	AC_MSG_CHECKING([for OpenSSL directory])
	AC_MSG_RESULT($openssldir)

	dnl Set SSL include files path
	AC_ARG_WITH([openssl-includedir],
		AS_HELP_STRING([--with-openssl-includedir=<dir>],
			[path to include directory of OpenSSL or LibreSSL installation]
		), [
			opensslincludedir="$withval"
		], [
			if test -n "$openssldir"; then
				opensslincludedir="${openssldir}/include"
			else
				opensslincludedir=''

			AC_MSG_ERROR([Unable to locate ssl.h])
		fi
	fi

	dnl Set SSL lib files path
	AC_ARG_WITH([openssl-libdir],
		AS_HELP_STRING([--with-openssl-libdir=<dir>],
			[path to lib directory of OpenSSL or LibreSSL installation]
		), [
			openssllibdir="$withval"
		], [
			if test -n "$openssldir"; then
				if test "$do64bit" == 'yes' -a -d ${openssldir}/lib64; then
					openssllibdir="$openssldir/lib64"
				else

			AC_MSG_ERROR([Unable to locate libssl${LIBEXT}])
		fi
	fi

	dnl Set location of pkgconfig files
	AC_ARG_WITH([openssl-pkgconfig],
		AS_HELP_STRING([--with-openssl-pkgconfig=<dir>],
			[path to pkgconfigdir directory for OpenSSL or LibreSSL]
		), [
			opensslpkgconfigdir="$withval"
		], [
			if test -d ${libdir}/../pkgconfig; then
				opensslpkgconfigdir="$libdir/../pkgconfig"
			else
				opensslpkgconfigdir=''

		    # Linux and Solaris
		    TCLTLS_SSL_LIBS="$SSL_LIBS_PATH -Wl,-Bstatic -lssl -lcrypto -Wl,-Bdynamic"
		    # HPUX: -Wl,-a,archive ... -Wl,-a,shared_archive
		fi
	fi

	dnl Include config variables in --help list and make available to be substituted via AC_SUBST.
	AC_ARG_VAR([TCLTLS_SSL_CFLAGS], [C compiler flags for OpenSSL or LibreSSL])
	AC_ARG_VAR([TCLTLS_SSL_INCLUDES], [C compiler include paths for OpenSSL or LibreSSL])
	AC_ARG_VAR([TCLTLS_SSL_LIBS], [libraries to pass to the linker for OpenSSL or LibreSSL])
])