#!/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, 1.7.0)

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


dnl Checks for programs.
AC_PROG_CC
#--------------------------------------------------------------------
# macro used to verify that the configure script can find the sources
#--------------------------------------------------------------------

AC_INIT([tls], [1.6.7])
AC_PROG_MAKE_SET
AC_PROG_INSTALL
AC_GNU_SOURCE

dnl Determine system information
TEA_INIT([3.8])
DC_CHK_OS_INFO

AC_CONFIG_AUX_DIR(tclconfig)

dnl Look for appropriate headers
AC_CHECK_HEADERS(unistd.h stdlib.h string.h strings.h)
#--------------------------------------------------------------------
# Load the tclConfig.sh file
#--------------------------------------------------------------------

dnl Perform Tcl Extension required stuff
TEA_PATH_TCLCONFIG
TCLEXT_INIT
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.
#-----------------------------------------------------------------------

if test "$TCLEXT_BUILD" != 'static'; then
TEA_PREFIX

	dnl Determine how to make shared objects
#-----------------------------------------------------------------------
# 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.
#-----------------------------------------------------------------------

	DC_GET_SHOBJFLAGS
TEA_SETUP_COMPILER

#-----------------------------------------------------------------------
# __CHANGE__
	EXTENSION_TARGET="tcltls.${SHOBJEXT}"
else
	AC_CHECK_TOOL([AR], [ar], [false])
# Specify the C source files to compile in TEA_ADD_SOURCES,
	AC_CHECK_TOOL([RANLIB], [ranlib], [:])
	EXTENSION_TARGET="tcltls.a"
fi
AC_SUBST(EXTENSION_TARGET)
AC_SUBST(TCLEXT_BUILD)
# 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([])

dnl Determine what SSL library to link with
#--------------------------------------------------------------------
# A few miscellaneous platform-specific items:
#
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
		AC_MSG_ERROR([You may not specify --without-ssl])
	fi

# 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.
#
# 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.
#
	if test "$withval" = "yes"; then
		AC_MSG_ERROR([If you specify --with-ssl then you must provide a value])
	fi

	tcltls_ssl_lib="$withval"
], [
	tcltls_ssl_lib='auto'
])
# 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 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 "${TEA_PLATFORM}" = "windows" ; then
    AC_DEFINE(BUILD_tls)
	if test "$enableval" = "yes"; then
		tcltls_deterministic='true'
    AC_DEFINE(WINDOWS)
    CLEANFILES="pkgIndex.tcl *.lib *.dll *.exp *.ilk *.pdb vc*.pch"
	fi
])
if test "$tcltls_deterministic" = 'true'; then
	GEN_DH_PARAMS_ARGS='fallback'
else
    CLEANFILES="pkgIndex.tcl"
	GEN_DH_PARAMS_ARGS=''
fi
AC_SUBST(CLEANFILES)
AC_SUBST(GEN_DH_PARAMS_ARGS)

#--------------------------------------------------------------------
# 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.
# This MUST be called after TEA_LOAD_TCLCONFIG / TEA_LOAD_TKCONFIG
#--------------------------------------------------------------------

TEA_PUBLIC_TCL_HEADERS

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

TEA_ENABLE_THREADS

dnl Enable support for a debugging build
#--------------------------------------------------------------------
# The statement below defines a collection of symbols related to
# building as a shared library instead of a static library.
#--------------------------------------------------------------------

TEA_ENABLE_SHARED

tcltls_debug='false'
AC_ARG_ENABLE([debug], AS_HELP_STRING([--enable-debug], [enable debugging parameters]), [
	if test "$enableval" = "yes"; then
#--------------------------------------------------------------------
# This macro figures out what flags to use with the compiler/linker
# when building shared/static debug/optimized objects.  This information
		tcltls_debug='true'
# can be taken from the tclConfig.sh file, but this figures it all out.
#--------------------------------------------------------------------

	fi
TEA_CONFIG_CFLAGS

])
#--------------------------------------------------------------------
# Set the default compiler switches based on the --enable-symbols option.
#--------------------------------------------------------------------

if test "$tcltls_debug" = 'true'; then
TEA_ENABLE_SYMBOLS
	AC_DEFINE(TCLEXT_TCLTLS_DEBUG, [1], [Enable debugging build])
fi

#--------------------------------------------------------------------
# Everyone should be linking against the Tcl stub library.  If you
dnl Find "xxd" so we can build the tls.tcl.h file
AC_CHECK_TOOL([XXD], [xxd], [__xxd__not__found])
# 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)
dnl Find "pkg-config" since we need to use it
AC_CHECK_TOOL([PKGCONFIG], [pkg-config], [false])

#--------------------------------------------------------------------
# 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
dnl           defaulting to OpenSSL for compatibility reasons
#--------------------------------------------------------------------

if test "$tcltls_ssl_lib" = 'auto'; then
OPENSSL="1"

	tcltls_ssl_lib='openssl'
TLS_CHECK_SSL

fi
#--------------------------------------------------------------------
# Determine if we should use the patented encryption code
#--------------------------------------------------------------------

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

AC_MSG_CHECKING([which TLS library to use])
if test ${PATENTS} = no; then
    AC_DEFINE([NO_PATENTS])
AC_MSG_RESULT([$tcltls_ssl_lib])
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 Manually rewrite libressl to OpenSSL since we use the
#--------------------------------------------------------------------
# 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
# OpenSSL uses as its default names.
#--------------------------------------------------------------------

dnl compatibility interface
if test "${TEA_PLATFORM}" = "windows" ; then
    if test "$GCC" = "yes"; then
if test "$tcltls_ssl_lib" = "libressl"; then
	TEA_ADD_LIBS([-L${SSL_LIB_DIR_NATIVE}])
    else
	tcltls_ssl_lib='openssl'
	TEA_ADD_LIBS([-libpath:${SSL_LIB_DIR_NATIVE}])
    fi
fi
    if test -n "${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]

AS_CASE([$tcltls_ssl_lib],
    LIB_RUNTIME_DIR=${SSL_LIB_DIR}
    eval "LD_SEARCH_FLAGS=\"${LD_SEARCH_FLAGS}\""
    if test -n "${OPENSSL}"; then
	[openssl], [
		TCLTLS_SSL_OPENSSL
	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])
	],
	[nss], [
	 	TCLTLS_SSL_LIBS=""
    fi
fi

		TCLTLS_SSL_CFLAGS=""
		TCLTLS_SSL_CPPFLAGS=""
	],
	[
#--------------------------------------------------------------------
# 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.
#--------------------------------------------------------------------

		AC_MSG_ERROR([Unsupported SSL library: $tcltls_ssl_lib])
	]
TEA_PROG_TCLSH

)
#--------------------------------------------------------------------
# Finally, substitute all of the various values into the Makefile.
#--------------------------------------------------------------------
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 Produce output
AC_OUTPUT([Makefile])
AC_OUTPUT(Makefile pkgIndex.tcl)