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

AC_INIT(tcltls, @@VERS@@)

#--------------------------------------------------------------------
# macro used to verify that the configure script can find the sources
#--------------------------------------------------------------------

AC_INIT([tls], [1.6.7])

TEA_INIT([3.8])

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AC_GNU_SOURCE
AC_CONFIG_AUX_DIR(tclconfig)

#--------------------------------------------------------------------
# Load the tclConfig.sh file
#--------------------------------------------------------------------

TEA_PATH_TCLCONFIG
dnl Determine system information
DC_CHK_OS_INFO
TEA_LOAD_TCLCONFIG

#-----------------------------------------------------------------------
# Handle the --prefix=... option by defaulting to what Tcl gave.
# Must be called after TEA_LOAD_TCLCONFIG and before TEA_SETUP_COMPILER.
#-----------------------------------------------------------------------

dnl Look for appropriate headers
TEA_PREFIX

AC_CHECK_HEADERS(unistd.h stdlib.h string.h strings.h)
#-----------------------------------------------------------------------
# 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.
#-----------------------------------------------------------------------

TEA_SETUP_COMPILER

dnl Perform Tcl Extension required stuff
#-----------------------------------------------------------------------
# __CHANGE__
# Specify the C source files to compile in TEA_ADD_SOURCES,
TCLEXT_INIT
# 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([])
TEA_ADD_CFLAGS([])
TEA_ADD_STUB_SOURCES([])
TEA_ADD_TCL_SOURCES([])

if test "$TCLEXT_BUILD" != 'static'; then
#--------------------------------------------------------------------
# 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 Determine how to make shared objects
	DC_GET_SHOBJFLAGS

# 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.
#
# Define any extra compiler flags in the PACKAGE_CFLAGS variable.
# These will be appended to the current set of compiler flags for
# your system.
#--------------------------------------------------------------------

	EXTENSION_TARGET="tcltls.${SHOBJEXT}"
if test "${TEA_PLATFORM}" = "windows" ; then
    AC_DEFINE(BUILD_tls)
    AC_DEFINE(WINDOWS)
    CLEANFILES="pkgIndex.tcl *.lib *.dll *.exp *.ilk *.pdb vc*.pch"
else
	AC_CHECK_TOOL([AR], [ar], [false])
	AC_CHECK_TOOL([RANLIB], [ranlib], [:])
    CLEANFILES="pkgIndex.tcl"
	EXTENSION_TARGET="tcltls.a"
fi
AC_SUBST(EXTENSION_TARGET)
AC_SUBST(CLEANFILES)
AC_SUBST(TCLEXT_BUILD)

#--------------------------------------------------------------------
# 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 Determine what SSL library to link with
AC_ARG_WITH([ssl], AS_HELP_STRING([--with-ssl], [name of ssl library to build against (openssl, libressl, nss, auto)]), [
	if test "$withval" = "no"; then
# This MUST be called after TEA_LOAD_TCLCONFIG / TEA_LOAD_TKCONFIG
#--------------------------------------------------------------------

		AC_MSG_ERROR([You may not specify --without-ssl])
TEA_PUBLIC_TCL_HEADERS

	fi
#--------------------------------------------------------------------
# Check whether --enable-threads or --disable-threads was given.
#--------------------------------------------------------------------

TEA_ENABLE_THREADS

	if test "$withval" = "yes"; then
#--------------------------------------------------------------------
# The statement below defines a collection of symbols related to
# building as a shared library instead of a static library.
#--------------------------------------------------------------------

		AC_MSG_ERROR([If you specify --with-ssl then you must provide a value])
TEA_ENABLE_SHARED

	fi
#--------------------------------------------------------------------
# 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

	tcltls_ssl_lib="$withval"
#--------------------------------------------------------------------
# Set the default compiler switches based on the --enable-symbols option.
#--------------------------------------------------------------------

], [
TEA_ENABLE_SYMBOLS

	tcltls_ssl_lib='auto'
#--------------------------------------------------------------------
# Everyone should be linking against the Tcl stub library.  If you
# 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.
#--------------------------------------------------------------------

])
AC_DEFINE(USE_TCL_STUBS)

#--------------------------------------------------------------------
# If the variable OPENSSL is set, we will build with the OpenSSL
# libraries.  If it is not set, then we will use RSA BSAFE SSL-C
# libraries instead of the default OpenSSL libaries.
#--------------------------------------------------------------------

dnl XXX:TODO: Automatically determine the SSL library to use
OPENSSL="1"

dnl           defaulting to OpenSSL for compatibility reasons
TLS_CHECK_SSL

if test "$tcltls_ssl_lib" = 'auto'; then
#--------------------------------------------------------------------
# Determine if we should use the patented encryption code
#--------------------------------------------------------------------

	tcltls_ssl_lib='openssl'
AC_ARG_ENABLE(patents, [  --enable-patents        Use patented code.  Default is enabled], PATENTS=${enableval}, PATENTS=yes)  

if test ${PATENTS} = no; then
    AC_DEFINE([NO_PATENTS])
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.
#--------------------------------------------------------------------

AC_MSG_CHECKING([which TLS library to use])
AS_CASE([$tcltls_ssl_lib],
	[openssl], [
TEA_MAKE_LIB

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

	],
	[
if test "${TEA_PLATFORM}" = "windows" ; then
    if test "$GCC" = "yes"; then
	TEA_ADD_LIBS([-L${SSL_LIB_DIR_NATIVE}])
    else
	TEA_ADD_LIBS([-libpath:${SSL_LIB_DIR_NATIVE}])
    fi
    if test -n "${OPENSSL}"; then
        TEA_ADD_LIBS([ssleay32.lib libeay32.lib])
    else
        TEA_ADD_LIBS([sslc32.lib])
    fi
else
    # Subst runtime dir here, use -R and -L where necessary. [Bug 1742859]
    LIB_RUNTIME_DIR=${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

		AC_MSG_ERROR([Unsupported SSL library: $tcltls_ssl_lib])
	]
#--------------------------------------------------------------------
# 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.
#--------------------------------------------------------------------

)
TEA_PROG_TCLSH

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

dnl Produce output
AC_OUTPUT([Makefile])
AC_OUTPUT(Makefile pkgIndex.tcl)