#!/bin/bash -norc
dnl	This file is an input file used by the GNU "autoconf" program to
dnl	generate the file "configure", which is run during Tcl installation
dnl	to configure the system for the local environment.
dnl 
dnl Define ourselves
dnl This file contains code to generate "tls" using either the
dnl OpenSSL libraries or libraries from the commercial BSAFE SSL-C
dnl product from RSA Security.  In the United States, it is necessary
dnl to use the RSA BSAFE libraries for any product developed for
dnl commercial use. Licensing information for BSAFE SSL-C may be
dnl obtained from RSA Data Scurity Inc., San Mateo, California, USA.
dnl Their home page on the web is "www.rsasecurity.com". 
#
AC_INIT(tcltls, 1.7.1)

# RCS: @(#) $Id: configure.in,v 1.31 2015/07/07 17:16:02 andreas_kupries Exp $

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AC_GNU_SOURCE

#--------------------------------------------------------------------
# macro used to verify that the configure script can find the sources
#--------------------------------------------------------------------
dnl Determine system information
DC_CHK_OS_INFO

AC_INIT([tls], [1.6.7])
dnl Look for appropriate headers
AC_CHECK_HEADERS(unistd.h stdlib.h string.h strings.h)

dnl Perform Tcl Extension required stuff
TEA_INIT([3.8])
TCLEXT_INIT

AC_CONFIG_AUX_DIR(tclconfig)

if test "$TCLEXT_BUILD" != 'static'; then
	dnl Determine how to make shared objects
	DC_GET_SHOBJFLAGS
#--------------------------------------------------------------------
# Load the tclConfig.sh file
#--------------------------------------------------------------------

	EXTENSION_TARGET="tcltls.${SHOBJEXT}"
else
	AC_CHECK_TOOL([AR], [ar], [false])
TEA_PATH_TCLCONFIG
	AC_CHECK_TOOL([RANLIB], [ranlib], [:])
TEA_LOAD_TCLCONFIG

	EXTENSION_TARGET="tcltls.${AREXT}"
#-----------------------------------------------------------------------
# Handle the --prefix=... option by defaulting to what Tcl gave.
# Must be called after TEA_LOAD_TCLCONFIG and before TEA_SETUP_COMPILER.
#-----------------------------------------------------------------------

TEA_PREFIX
fi
AC_SUBST(EXTENSION_TARGET)
AC_SUBST(TCLEXT_BUILD)

#-----------------------------------------------------------------------
# Standard compiler checks.
# This sets up CC by using the CC env var, or looks for gcc otherwise.
# This also calls AC_PROG_CC, AC_PROG_INSTALL and a few others to create
# the basic setup necessary to compile executables.
dnl Determine what SSL library to link with
#-----------------------------------------------------------------------

AC_ARG_WITH([ssl], AS_HELP_STRING([--with-ssl=<name>], [name of ssl library to build against (openssl, libressl, nss, auto)]), [
TEA_SETUP_COMPILER
	if test "$withval" = "no"; then
		AC_MSG_ERROR([You may not specify --without-ssl])
	fi

#-----------------------------------------------------------------------
# __CHANGE__
# Specify the C source files to compile in TEA_ADD_SOURCES,
	if test "$withval" = "yes"; then
		AC_MSG_ERROR([If you specify --with-ssl then you must provide a value])
	fi
# public headers that need to be installed in TEA_ADD_HEADERS,
# stub library C source files to compile in TEA_ADD_STUB_SOURCES,
# and runtime Tcl library files in TEA_ADD_TCL_SOURCES.
# This defines PKG(_STUB)_SOURCES, PKG(_STUB)_OBJECTS, PKG_HEADERS
# and PKG_TCL_SOURCES.
#-----------------------------------------------------------------------

TEA_ADD_SOURCES([])
TEA_ADD_HEADERS([])
TEA_ADD_INCLUDES([])
TEA_ADD_LIBS([])
	tcltls_ssl_lib="$withval"
], [
TEA_ADD_CFLAGS([])
TEA_ADD_STUB_SOURCES([])
TEA_ADD_TCL_SOURCES([])

	tcltls_ssl_lib='auto'
#--------------------------------------------------------------------
# A few miscellaneous platform-specific items:
#
])

# Define a special symbol for Windows (BUILD_sample in this case) so
# that we create the export library with the dll.  See sha1.h on how
# to use this.
dnl Enable support for building the same library every time
tcltls_deterministic='false'
AC_ARG_ENABLE([deterministic], AS_HELP_STRING([--enable-deterministic], [enable deterministic parameters]), [
	if test "$enableval" = "yes"; then
		tcltls_deterministic='true'
	fi
])
if test "$tcltls_deterministic" = 'true'; then
	GEN_DH_PARAMS_ARGS='fallback'
else
#
# Windows creates a few extra files that need to be cleaned up.
# You can add more files to clean if your extension creates any extra
# files.
	GEN_DH_PARAMS_ARGS=''
fi
#
AC_SUBST(GEN_DH_PARAMS_ARGS)
# Define any extra compiler flags in the PACKAGE_CFLAGS variable.
# These will be appended to the current set of compiler flags for
# your system.
#--------------------------------------------------------------------

dnl Allow the user to manually disable protocols
dnl ## SSLv2: Disabled by default
tcltls_ssl_ssl2='false'
AC_ARG_ENABLE([sslv2], AS_HELP_STRING([--enable-sslv2], [enable SSLv2 protocol]), [
if test "${TEA_PLATFORM}" = "windows" ; then
	if test "$enableval" = "yes"; then
    AC_DEFINE(BUILD_tls)
    AC_DEFINE(WINDOWS)
    CLEANFILES="pkgIndex.tcl *.lib *.dll *.exp *.ilk *.pdb vc*.pch"
else
		tcltls_ssl_ssl2='force'
    CLEANFILES="pkgIndex.tcl"
fi
	fi
AC_SUBST(CLEANFILES)
])

#--------------------------------------------------------------------
# Choose which headers you need.  Extension authors should try very
# hard to only rely on the Tcl public header files.  Internal headers
# contain private data structures and are subject to change without
# notice.
dnl ## SSLv3: Disabled by default
tcltls_ssl_ssl3='false'
AC_ARG_ENABLE([sslv3], AS_HELP_STRING([--enable-sslv3], [enable SSLv3 protocol]), [
	if test "$enableval" = "yes"; then
		tcltls_ssl_ssl3='force'
# This MUST be called after TEA_LOAD_TCLCONFIG / TEA_LOAD_TKCONFIG
#--------------------------------------------------------------------

	fi
TEA_PUBLIC_TCL_HEADERS
])

#--------------------------------------------------------------------
# Check whether --enable-threads or --disable-threads was given.
dnl ## TLSv1.0: Enabled by default
tcltls_ssl_tls1_0='true'
AC_ARG_ENABLE([tlsv1.0], AS_HELP_STRING([--disable-tlsv1.0], [disable TLSv1.0 protocol]), [
#--------------------------------------------------------------------
	if test "$enableval" = "no"; then
		tcltls_ssl_tls1_0='false'
	fi
])

dnl ## TLSv1.1: Enabled by default
tcltls_ssl_tls1_1='true'
TEA_ENABLE_THREADS

AC_ARG_ENABLE([tlsv1.1], AS_HELP_STRING([--disable-tlsv1.1], [disable TLSv1.1 protocol]), [
	if test "$enableval" = "no"; then
#--------------------------------------------------------------------
# The statement below defines a collection of symbols related to
# building as a shared library instead of a static library.
		tcltls_ssl_tls1_1='false'
#--------------------------------------------------------------------

	fi
TEA_ENABLE_SHARED

])
#--------------------------------------------------------------------
# This macro figures out what flags to use with the compiler/linker
# when building shared/static debug/optimized objects.  This information
# can be taken from the tclConfig.sh file, but this figures it all out.
#--------------------------------------------------------------------

TEA_CONFIG_CFLAGS

dnl ## TLSv1.1: Enabled by default
#--------------------------------------------------------------------
# Set the default compiler switches based on the --enable-symbols option.
#--------------------------------------------------------------------

TEA_ENABLE_SYMBOLS

tcltls_ssl_tls1_2='true'
AC_ARG_ENABLE([tlsv1.2], AS_HELP_STRING([--disable-tlsv1.2], [disable TLSv1.2 protocol]), [
	if test "$enableval" = "no"; then
#--------------------------------------------------------------------
# Everyone should be linking against the Tcl stub library.  If you
		tcltls_ssl_tls1_2='false'
	fi
])
# can't for some reason, remove this definition.  If you aren't using
# stubs, you also need to modify the SHLIB_LD_LIBS setting below to
# link against the non-stubbed Tcl library.  Add Tk too if necessary.
#--------------------------------------------------------------------

dnl Enable support for a debugging build
tcltls_debug='false'
AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [enable debugging parameters]), [
	if test "$enableval" = "yes"; then
		tcltls_debug='true'
	fi
])
if test "$tcltls_debug" = 'true'; then
AC_DEFINE(USE_TCL_STUBS)
	AC_DEFINE(TCLEXT_TCLTLS_DEBUG, [1], [Enable debugging build])
fi

#--------------------------------------------------------------------
# If the variable OPENSSL is set, we will build with the OpenSSL
dnl Find "xxd" so we can build the tls.tcl.h file
# libraries.  If it is not set, then we will use RSA BSAFE SSL-C
# libraries instead of the default OpenSSL libaries.
#--------------------------------------------------------------------

AC_CHECK_PROG([XXD], [xxd], [xxd], [__xxd__not__found])
OPENSSL="1"

dnl Find "pkg-config" since we need to use it
TLS_CHECK_SSL
AC_CHECK_TOOL([PKGCONFIG], [pkg-config], [false])

#--------------------------------------------------------------------
# Determine if we should use the patented encryption code
dnl Determine if we have been asked to statically link to the SSL library
#--------------------------------------------------------------------

TCLEXT_TLS_STATIC_SSL='no'
AC_ARG_ENABLE(patents, [  --enable-patents        Use patented code.  Default is enabled], PATENTS=${enableval}, PATENTS=yes)  

if test ${PATENTS} = no; then
AC_ARG_ENABLE([static-ssl], AS_HELP_STRING([--enable-static-ssl], [enable statically linking to the specified SSL library]), [
	if test "$enableval" = 'yes'; then
    AC_DEFINE([NO_PATENTS])
fi

		TCLEXT_TLS_STATIC_SSL='yes'
	fi
])
#--------------------------------------------------------------------
# This macro generates a line to use when building a library.  It
# depends on values set by the TEA_ENABLE_SHARED, TEA_ENABLE_SYMBOLS,
# and TEA_LOAD_TCLCONFIG macros above.
#--------------------------------------------------------------------

TEA_MAKE_LIB
dnl XXX:TODO: Automatically determine the SSL library to use
dnl           defaulting to OpenSSL for compatibility reasons
if test "$tcltls_ssl_lib" = 'auto'; then
	tcltls_ssl_lib='openssl'
fi

#--------------------------------------------------------------------
# Shared libraries and static libraries have different names.
# Also, windows libraries and unix libraries have different names.
# For the OpenSSL version, I chose to use the same library names that
AC_MSG_CHECKING([which TLS library to use])
# OpenSSL uses as its default names.
#--------------------------------------------------------------------
AC_MSG_RESULT([$tcltls_ssl_lib])

if test "${TEA_PLATFORM}" = "windows" ; then
    if test "$GCC" = "yes"; then
dnl Manually rewrite libressl to OpenSSL since we use the
dnl compatibility interface
if test "$tcltls_ssl_lib" = "libressl"; then
	TEA_ADD_LIBS([-L${SSL_LIB_DIR_NATIVE}])
    else
	tcltls_ssl_lib='openssl'
	TEA_ADD_LIBS([-libpath:${SSL_LIB_DIR_NATIVE}])
    fi
    if test -n "${OPENSSL}"; then
        TEA_ADD_LIBS([ssleay32.lib libeay32.lib])
    else
        TEA_ADD_LIBS([sslc32.lib])
    fi
else
    # Subst runtime dir here, use -R and -L where necessary. [Bug 1742859]
fi

AS_CASE([$tcltls_ssl_lib],
	[openssl], [
		TCLTLS_SSL_OPENSSL
	],
	[nss], [
	 	TCLTLS_SSL_LIBS=""
		TCLTLS_SSL_CFLAGS=""
		TCLTLS_SSL_CPPFLAGS=""
	],
	[
		AC_MSG_ERROR([Unsupported SSL library: $tcltls_ssl_lib])
	]
)
dnl Determine how to use this SSL library
AC_MSG_CHECKING([how to use $tcltls_ssl_lib])
LIBS="${LIBS} ${TCLTLS_SSL_LIBS}"
CFLAGS="${CFLAGS} ${TCLTLS_SSL_CFLAGS}"
CPPFLAGS="${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])
    LIB_RUNTIME_DIR=${SSL_LIB_DIR}
    eval "LD_SEARCH_FLAGS=\"${LD_SEARCH_FLAGS}\""
    if test -n "${OPENSSL}"; then
	TEA_ADD_LIBS([${LD_SEARCH_FLAGS} -L${SSL_LIB_DIR} -lssl -lcrypto ${GCCPATH} ${GCCLIB}])
    else
	TEA_ADD_LIBS([${LD_SEARCH_FLAGS} -L${SSL_LIB_DIR} -lsslc])
    fi
	fi
fi

#--------------------------------------------------------------------
# Find tclsh so that we can run pkg_mkIndex to generate the pkgIndex.tcl
# file during the install process.  Don't run the TCLSH_PROG through
# ${CYGPATH} because it's being used directly by make.
# Require that we use a tclsh shell version 8.2 or later since earlier
# versions have bugs in the pkg_mkIndex routine.
# Add WISH as well if this is a Tk extension.
#--------------------------------------------------------------------

dnl Produce output
TEA_PROG_TCLSH

#--------------------------------------------------------------------
# Finally, substitute all of the various values into the Makefile.
#--------------------------------------------------------------------

AC_OUTPUT([Makefile])
AC_OUTPUT(Makefile pkgIndex.tcl)