od -A n -v -t xC < '@srcdir@/tls.tcl' > tls.tcl.h.new.1
	sed 's@  *@@g;s@..@0x&, @g' < tls.tcl.h.new.1 > tls.tcl.h.new.2
	rm -f tls.tcl.h.new.1
	mv tls.tcl.h.new.2 tls.tcl.h

# Create default DH parameters
dh_params.h: @srcdir@/gen_dh_params Makefile
	sh @srcdir@/gen_dh_params @GEN_DH_PARAMS_ARGS@ > dh_params.h.new
	mv dh_params.h.new dh_params.h

# Generic target for building files from the "srcdir"
# tree -- the default target will not match paths
.c.o:
	$(CC) $(CPPFLAGS) $(CFLAGS) -o "$@" -c "$<"

		AC_DEFINE($4, [1], [Define this to disable $3 in OpenSSL support])
	fi

])

AC_DEFUN([TCLTLS_SSL_OPENSSL], [
	openssldir=''
	opensslpkgconfigdir=''
	AC_ARG_WITH([ssl-dir],
		AS_HELP_STRING(
			[--with-ssl-dir=<dir>],
			[deprecated, use --with-openssl-dir -- currently has the same meaning]
		), [
			openssldir="$withval"
		]
	)
	AC_ARG_WITH([openssl-dir],
		AS_HELP_STRING(
			[--with-openssl-dir=<dir>],
			[path to root directory of OpenSSL or LibreSSL installation]
		), [
			openssldir="$withval"
		]
	)
	AC_ARG_WITH([openssl-pkgconfig],
		AS_HELP_STRING(
			[--with-openssl-pkgconfig=<dir>],
			[path to root directory of OpenSSL or LibreSSL pkgconfigdir]
		), [
			opensslpkgconfigdir="$withval"
		]
	)

	if test -n "$openssldir"; then
		if test -e "$openssldir/libssl.$SHOBJEXT"; then
			TCLTLS_SSL_LIBS="-L$openssldir -lssl -lcrypto"
			openssldir="`AS_DIRNAME(["$openssldir"])`"
		else
			TCLTLS_SSL_LIBS="-L$openssldir/lib -lssl -lcrypto"
		fi
		TCLTLS_SSL_CFLAGS="-I$openssldir/include"
		TCLTLS_SSL_CPPFLAGS="-I$openssldir/include"
	fi

	pkgConfigExtraArgs=''
	if test "$TCLEXT_BUILD" = "static" -o "$TCLEXT_TLS_STATIC_SSL" = 'yes'; then
		pkgConfigExtraArgs='--static'
	fi

	dnl Use pkg-config to find the libraries
	dnl Temporarily update PKG_CONFIG_PATH
	PKG_CONFIG_PATH_SAVE="${PKG_CONFIG_PATH}"
	if test -n "${opensslpkgconfigdir}"; then
		if ! test -f "${opensslpkgconfigdir}/openssl.pc"; then
			AC_MSG_ERROR([Unable to locate ${opensslpkgconfigdir}/openssl.pc])
		fi

		PKG_CONFIG_PATH="${opensslpkgconfigdir}${PATH_SEPARATOR}${PKG_CONFIG_PATH}"
		export PKG_CONFIG_PATH
	fi

	AC_ARG_VAR([TCLTLS_SSL_LIBS], [libraries to pass to the linker for OpenSSL or LibreSSL])
	AC_ARG_VAR([TCLTLS_SSL_CFLAGS], [C compiler flags for OpenSSL or LibreSSL])
	AC_ARG_VAR([TCLTLS_SSL_CPPFLAGS], [C preprocessor flags for OpenSSL or LibreSSL])
	if test -z "$TCLTLS_SSL_LIBS"; then
		TCLTLS_SSL_LIBS="`"${PKGCONFIG}" openssl --libs $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
	fi
	if test -z "$TCLTLS_SSL_CFLAGS"; then
		TCLTLS_SSL_CFLAGS="`"${PKGCONFIG}" openssl --cflags-only-other $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
	fi
	if test -z "$TCLTLS_SSL_CPPFLAGS"; then
		TCLTLS_SSL_CPPFLAGS="`"${PKGCONFIG}" openssl --cflags-only-I $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
	fi
	PKG_CONFIG_PATH="${PKG_CONFIG_PATH_SAVE}"

	if test "$TCLEXT_BUILD" = "static"; then
		dnl If we are doing a static build, save the linker flags for other programs to consume
		rm -f tcltls.a.linkadd
		AS_ECHO(["$TCLTLS_SSL_LIBS"]) > tcltls.a.linkadd
	fi

	dnl Save compile-altering variables we are changing
	SAVE_LIBS="${LIBS}"
	SAVE_CFLAGS="${CFLAGS}"
	SAVE_CPPFLAGS="${CPPFLAGS}"

	dnl Update compile-altering variables to include the OpenSSL libraries
	LIBS="${TCLTLS_SSL_LIBS} ${SAVE_LIBS} ${TCLTLS_SSL_LIBS}"
	CFLAGS="${TCLTLS_SSL_CFLAGS} ${SAVE_CFLAGS} ${TCLTLS_SSL_CFLAGS}"
	CPPFLAGS="${TCLTLS_SSL_CPPFLAGS} ${SAVE_CPPFLAGS} ${TCLTLS_SSL_CPPFLAGS}"

	dnl Verify that basic functionality is there
	AC_LANG_PUSH(C)
	AC_MSG_CHECKING([if a basic OpenSSL program works])
	AC_LINK_IFELSE([AC_LANG_PROGRAM([
#include <openssl/ssl.h>
#include <openssl/opensslv.h>

dnl Define ourselves
AC_INIT(tcltls, 1.7.13)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AC_GNU_SOURCE

	],
	[
		AC_MSG_ERROR([Unsupported SSL library: $tcltls_ssl_lib])
	]
)
dnl Determine how to use this SSL library
AC_MSG_CHECKING([how to use $tcltls_ssl_lib])
LIBS="${TCLTLS_SSL_LIBS} ${LIBS} ${TCLTLS_SSL_LIBS}"
CFLAGS="${TCLTLS_SSL_CFLAGS} ${CFLAGS} ${TCLTLS_SSL_CFLAGS}"
CPPFLAGS="${TCLTLS_SSL_CPPFLAGS} ${CPPFLAGS} ${TCLTLS_SSL_CPPFLAGS}"
AC_MSG_RESULT([$TCLTLS_SSL_CPPFLAGS $TCLTLS_SSL_CFLAGS $TCLTLS_SSL_LIBS])

dnl Sync the RPATH if requested
if test "$TCLEXT_BUILD" != 'static'; then
	if test "$TCLEXT_TLS_STATIC_SSL" = 'yes'; then
		DC_SYNC_RPATH([no])
	else
		DC_SYNC_RPATH([yes])
	fi
fi

dnl Produce output
AC_OUTPUT(Makefile pkgIndex.tcl)