path: root/lib/crypto/configure.in

dnl Process this file with autoconf to produce a configure script. -*-m4-*-
dnl
dnl %CopyrightBegin%
dnl
dnl Copyright Ericsson AB 2018. All Rights Reserved.
dnl
dnl Licensed under the Apache License, Version 2.0 (the "License");
dnl you may not use this file except in compliance with the License.
dnl You may obtain a copy of the License at
dnl
dnl     http://www.apache.org/licenses/LICENSE-2.0
dnl
dnl Unless required by applicable law or agreed to in writing, software
dnl distributed under the License is distributed on an "AS IS" BASIS,
dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dnl See the License for the specific language governing permissions and
dnl limitations under the License.
dnl
dnl %CopyrightEnd%
dnl

dnl define([AC_CACHE_LOAD], )dnl
dnl define([AC_CACHE_SAVE], )dnl


AC_INIT(vsn.mk)

if test -z "$ERL_TOP" || test ! -d "$ERL_TOP" ; then
  AC_CONFIG_AUX_DIRS(autoconf)
else
  erl_top=${ERL_TOP}
  AC_CONFIG_AUX_DIRS($erl_top/erts/autoconf)
fi

if test "X$host" != "Xfree_source" -a "X$host" != "Xwin32"; then
    AC_CANONICAL_HOST
else
    host_os=win32
fi

LM_PRECIOUS_VARS

if test "$cross_compiling" = "yes"; then
    CROSS_COMPILING=yes
else
    CROSS_COMPILING=no
fi
AC_SUBST(CROSS_COMPILING)

ERL_XCOMP_SYSROOT_INIT

AC_PROG_CC
LM_WINDOWS_ENVIRONMENT

ERL_DED

dnl
dnl SSL, SSH and CRYPTO need the OpenSSL libraries
dnl
dnl Check flags --with-ssl, --without-ssl --with-ssl=PATH.
dnl If no option is given or --with-ssl is set without a path then we
dnl search for OpenSSL libraries and header files in the standard locations. 
dnl If set to --without-ssl we disable the use of SSL, SSH and CRYPTO.
dnl If set to --with-ssl=PATH we use that path as the prefix, i.e. we
dnl use "PATH/include" and "PATH/lib".

AC_CHECK_SIZEOF(void *)

std_ssl_locations="/usr/local /usr/sfw /usr /opt/local /usr/pkg /usr/local/openssl /usr/lib/openssl /usr/openssl /usr/local/ssl /usr/lib/ssl /usr/ssl /"

AC_ARG_WITH(ssl-zlib,
AS_HELP_STRING([--with-ssl-zlib=PATH],
               [specify location of ZLib to be used by OpenSSL])
AS_HELP_STRING([--with-ssl-zlib],
               [link SSL with  Zlib (default if found)])
AS_HELP_STRING([--without-ssl-zlib],
               [don't link SSL with ZLib]))

if  test "x$with_ssl_zlib" = "xno"; then
	SSL_LINK_WITH_ZLIB=no
	STATIC_ZLIB_LIBS=
elif test "x$with_ssl_zlib" = "xyes" || test "x$with_ssl_zlib" = "x"; then
	if test $erl_xcomp_without_sysroot = yes; then
		AC_MSG_WARN([Cannot search for zlib; missing cross system root (erl_xcomp_sysroot).])
		SSL_LINK_WITH_ZLIB=no	
		STATIC_ZLIB_LIBS=	
	elif  test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
		SSL_LINK_WITH_ZLIB=no	
		STATIC_ZLIB_LIBS=	
	else
		SSL_LINK_WITH_ZLIB=no
		STATIC_ZLIB_LIBS=
		AC_MSG_CHECKING(for static ZLib to be used by SSL in standard locations) 
		for rdir in $std_ssl_locations; do
			dir="$erl_xcomp_sysroot$rdir"
			if test "x$ac_cv_sizeof_void_p" = "x8"; then
				if test -f "$dir/lib64/libz.a"; then
					SSL_LINK_WITH_ZLIB=yes
					STATIC_ZLIB_LIBS="$dir/lib64/libz.a"
					break
				elif test -f "$dir/lib/64/libz.a"; then
					SSL_LINK_WITH_ZLIB=yes
					STATIC_ZLIB_LIBS="$dir/lib/64/libz.a"
					break
				fi
			fi
			if test -f "$dir/lib/libz.a"; then
					SSL_LINK_WITH_ZLIB=yes
				STATIC_ZLIB_LIBS="$dir/lib/libz.a"
				break
			fi
		done
		if test "x$SSL_LINK_WITH_ZLIB" = "xno"; then
		       	AC_MSG_RESULT([no])
		else
			AC_MSG_RESULT([$STATIC_ZLIB_LIBS])
		fi
	fi				
else
	SSL_LINK_WITH_ZLIB=no
	STATIC_ZLIB_LIBS=
	if test -f "$with_ssl_zlib/libz.a"; then
		SSL_LINK_WITH_ZLIB=yes
		STATIC_ZLIB_LIBS=$with_ssl_zlib/libz.a
	elif test -f "$with_ssl_zlib/lib/libz.a"; then
		SSL_LINK_WITH_ZLIB=yes
		STATIC_ZLIB_LIBS=$with_ssl_zlib/lib/libz.a
	fi
	if test "x$ac_cv_sizeof_void_p" = "x8"; then
		if test -f "$with_ssl_zlib/lib64/libz.a"; then
			SSL_LINK_WITH_ZLIB=yes
			STATIC_ZLIB_LIBS=$with_ssl_zlib/lib64/libz.a
		elif test -f "$with_ssl_zlib/lib/64/libz.a"; then
			SSL_LINK_WITH_ZLIB=yes
			STATIC_ZLIB_LIBS=$with_ssl_zlib/lib/64/libz.a
		fi
	fi
	if test "x$SSL_LINK_WITH_ZLIB" = "xno"; then
	       	AC_MSG_ERROR(Invalid path to option --with-ssl-zlib=PATH)
	fi
fi
		
			
AC_ARG_WITH(ssl,
AS_HELP_STRING([--with-ssl=PATH], [specify location of OpenSSL include and lib])
AS_HELP_STRING([--with-ssl], [use SSL (default)])
AS_HELP_STRING([--without-ssl], [don't use SSL]))

AC_ARG_WITH(ssl-incl,
AS_HELP_STRING([--with-ssl-incl=PATH], [location of OpenSSL include dir, if different than specified by --with-ssl=PATH]),
[
case X$with_ssl in
    X | Xyes | Xno) AC_MSG_ERROR([--with-ssl-incl=PATH set without --with-ssl=PATH]);;
esac
],
[with_ssl_incl=$with_ssl]) #default

AC_ARG_WITH(ssl-rpath,
AS_HELP_STRING([--with-ssl-rpath=yes|no|PATHS],
               [runtime library path for OpenSSL. Default is "yes", which equates to a
	       number of standard locations. If "no", then no runtime
	       library paths will be used. Anything else should be a
	       comma separated list of paths.]),
[
case X$with_ssl in
    Xno) AC_MSG_ERROR([--with-ssl-rpath set without --with-ssl]);;
esac
],
[with_ssl_rpath=yes]) #default


AC_ARG_ENABLE(dynamic-ssl-lib,
AS_HELP_STRING([--disable-dynamic-ssl-lib],
               [disable using dynamic openssl libraries]),
[ case "$enableval" in
    no) enable_dynamic_ssl=no ;;
    *)  enable_dynamic_ssl=yes ;;
  esac ], enable_dynamic_ssl=yes)

#----------------------------------------------------------------------
# We actually might do the SSL tests twice due to late discovery of 
# kerberos problems with static linking, in case we redo it all trying
# dynamic SSL libraries instead.
#----------------------------------------------------------------------

ssl_done=no

while test "x$ssl_done" != "xyes"; do

ssl_done=yes # Default only one run

# Remove all SKIP files from previous runs
for a in ssl crypto ssh; do
  rm -f "$ERL_TOP/lib/$a/SKIP"
done

SSL_DYNAMIC_ONLY=$enable_dynamic_ssl
SSL_STATIC_ONLY=no

case "$erl_xcomp_without_sysroot-$with_ssl" in
  yes-* | no-no)
    SSL_APP=
    CRYPTO_APP=
    SSH_APP=
    if test "$with_ssl" = "no"; then
	skip="User gave --without-ssl option"
    else
	skip="Cannot search for ssl; missing cross system root (erl_xcomp_sysroot)."
    fi
    for a in ssl crypto ssh; do
        echo "$skip" > $ERL_TOP/lib/$a/SKIP
    done
    ;;
  no-yes | no- )
    # On windows, we could try to find the installation
    # of Shining Light OpenSSL, which can be found by poking in
    # the uninstall section in the registry, it's worth a try...
    extra_dir=""
    if  test "x$MIXED_CYGWIN" = "xyes"; then
    	AC_CHECK_PROG(REGTOOL, regtool, regtool, false)
	if test "$ac_cv_prog_REGTOOL" != false; then
		wrp="/machine/software/microsoft/windows/currentversion/"
	   	if test "x$ac_cv_sizeof_void_p" = "x8"; then
		   urp="uninstall/openssl (64-bit)_is1/inno setup: app path"
		   regtool_subsystem=-w
		else
		   urp="uninstall/openssl (32-bit)_is1/inno setup: app path"
		   regtool_subsystem=-W
		fi	
		rp="$wrp$urp"
		if regtool -q $regtool_subsystem get "$rp" > /dev/null; then
		   true
		else
		   # Fallback to unspecified wordlength
		   urp="uninstall/openssl_is1/inno setup: app path"
		   rp="$wrp$urp"
		fi	
		if regtool -q $regtool_subsystem get "$rp" > /dev/null; then
			ssl_install_dir=`regtool -q $regtool_subsystem get "$rp"`
			# Try hard to get rid of spaces...
			if cygpath -d "$ssl_install_dir" > /dev/null 2>&1; then
				ssl_install_dir=`cygpath -d "$ssl_install_dir"`
			fi
			extra_dir=`cygpath $ssl_install_dir`
		fi
	fi
    elif test "x$MIXED_MSYS" = "xyes"; then
    	AC_CHECK_PROG(REGTOOL, reg_query.sh, reg_query.sh, false)
	if test "$ac_cv_prog_REGTOOL" != false; then
	   	if test "x$ac_cv_sizeof_void_p" = "x8"; then
		   rp="HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/OpenSSL (64-bit)_is1"
		else
		   rp="HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/OpenSSL_is1"
		fi	
		key="Inno Setup: App Path"
		if "$ac_cv_prog_REGTOOL" "$rp" "$key" > /dev/null; then
			ssl_install_dir=`"$ac_cv_prog_REGTOOL" "$rp" "$key"`
			extra_dir=`win2msys_path.sh "$ssl_install_dir"`
		fi
	fi
    fi
    # We search for OpenSSL in the common OS standard locations.
    SSL_APP=ssl
    CRYPTO_APP=crypto
    SSH_APP=ssh

    SSL_CRYPTO_LIBNAME=crypto
    SSL_SSL_LIBNAME=ssl
    
    if  test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
    	if test "x$ac_cv_sizeof_void_p" = "x8"; then
	  std_win_ssl_locations="/cygdrive/c/OpenSSL-Win64 /c/OpenSSL-Win64 /opt/local64/pgm/OpenSSL"
	else
	  std_win_ssl_locations="/cygdrive/c/OpenSSL-Win32 /c/OpenSSL-Win32 /cygdrive/c/OpenSSL /c/OpenSSL /opt/local/pgm/OpenSSL"
	fi
    else
        std_win_ssl_locations=""
    fi


    AC_MSG_CHECKING(for OpenSSL >= 0.9.8c in standard locations)
    for rdir in $extra_dir $std_win_ssl_locations $std_ssl_locations; do
	dir="$erl_xcomp_sysroot$rdir"
	if test -f "$erl_xcomp_isysroot$rdir/include/openssl/opensslv.h"; then
		is_real_ssl=yes
		SSL_INCDIR="$dir"
		if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
			if test -f "$dir/lib/VC/libeay32.lib"; then
				SSL_RUNTIME_LIBDIR="$rdir/lib/VC"
				SSL_LIBDIR="$dir/lib/VC"
				SSL_CRYPTO_LIBNAME=libeay32
				SSL_SSL_LIBNAME=ssleay32
			elif test -f "$dir/lib/VC/openssl.lib"; then 
				SSL_RUNTIME_LIBDIR="$rdir/lib/VC"
				SSL_LIBDIR="$dir/lib/VC"
			elif test -f $dir/lib/VC/libeay32MD.lib; then
		            SSL_CRYPTO_LIBNAME=libeay32MD
		            SSL_SSL_LIBNAME=ssleay32MD
			    if test "x$enable_dynamic_ssl" = "xno" && \
	                       test -f  $dir/lib/VC/static/libeay32MD.lib; then
				  SSL_RUNTIME_LIBDIR="$rdir/lib/VC/static"
				  SSL_LIBDIR="$dir/lib/VC/static"
		            else
			          SSL_RUNTIME_LIBDIR="$rdir/lib/VC"
				  SSL_LIBDIR="$dir/lib/VC"
                            fi 
			elif test -f "$dir/lib/libeay32.lib"; then
				SSL_RUNTIME_LIBDIR="$rdir/lib"
				SSL_LIBDIR="$dir/lib"
				SSL_CRYPTO_LIBNAME=libeay32
				SSL_SSL_LIBNAME=ssleay32
			elif test -f "$dir/lib/openssl.lib"; then
				SSL_RUNTIME_LIBDIR="$rdir/lib"
				SSL_LIBDIR="$dir/lib"
			else
				is_real_ssl=no
			fi
		elif test -f "$dir/lib/powerpc/libsslcrypto.a"; then
			SSL_CRYPTO_LIBNAME=sslcrypto
			SSL_LIBDIR="$dir/lib/powerpc/"
			SSL_RUNTIME_LIBDIR="$rdir/lib/powerpc/"
		else
			if test "x$ac_cv_sizeof_void_p" = "x8"; then
				if test -f "$dir/lib64/libcrypto.a"; then
					SSL_RUNTIME_LIBDIR="$rdir/lib64"
					SSL_LIBDIR="$dir/lib64"
				elif test -f "$dir/lib/64/libcrypto.a"; then
					SSL_RUNTIME_LIBDIR="$rdir/lib/64"
					SSL_LIBDIR="$dir/lib/64"
				elif test -f "$dir/lib64/libcrypto.so"; then
					SSL_RUNTIME_LIBDIR="$rdir/lib64"
					SSL_LIBDIR="$dir/lib64"
				elif test -f "$dir/lib/64/libcrypto.so"; then
					SSL_RUNTIME_LIBDIR="$rdir/lib/64"
					SSL_LIBDIR="$dir/lib/64"
				else
					SSL_RUNTIME_LIBDIR="$rdir/lib"
					SSL_LIBDIR="$dir/lib"
				fi
			else	 
				SSL_RUNTIME_LIBDIR="$rdir/lib"
				SSL_LIBDIR="$dir/lib"
			fi
		fi
		if test '!' -f "$SSL_LIBDIR/lib${SSL_CRYPTO_LIBNAME}.a"; then
			SSL_DYNAMIC_ONLY=yes
		elif test '!' -f "$SSL_LIBDIR/lib${SSL_CRYPTO_LIBNAME}.so" -a '!' -f "$SSL_LIBDIR/lib${SSL_CRYPTO_LIBNAME}.dylib"; then
			SSL_STATIC_ONLY=yes
		fi
		SSL_BINDIR="$rdir/bin"
		if test "x$is_real_ssl" = "xyes" ; then
			SSL_INCLUDE="-I$dir/include"
			old_CPPFLAGS=$CPPFLAGS
			CPPFLAGS=$SSL_INCLUDE
			AC_EGREP_CPP(^yes$,[
#include <openssl/opensslv.h>
#if OPENSSL_VERSION_NUMBER >= 0x0090803fL
yes
#endif
			],[
			ssl_found=yes
			],[
			SSL_APP=
			ssl_found=no
         		])
         		CPPFLAGS=$old_CPPFLAGS
			if test "x$ssl_found" = "xyes"; then
			   	if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes"; then
				   	ssl_linkable=yes
				elif test "x${SSL_CRYPTO_LIBNAME}" = "xsslcrypto"; then
				# This should only be triggered seen OSE
					ssl_linkable=yes
				else
					saveCFLAGS="$CFLAGS"
 					saveLDFLAGS="$LDFLAGS"
					saveLIBS="$LIBS"
 					CFLAGS="$CFLAGS $SSL_INCLUDE"
					if test "x$SSL_STATIC_ONLY" = "xyes"; then
						LIBS="${SSL_LIBDIR}/lib${SSL_CRYPTO_LIBNAME}.a"
					else
						LDFLAGS="$LDFLAGS -L$SSL_LIBDIR"
						LIBS="$LIBS -l${SSL_CRYPTO_LIBNAME}"
					fi
 					AC_TRY_LINK([
					#include <stdio.h>
 					#include <openssl/hmac.h>],
 					[ 
					HMAC(0, 0, 0, 0, 0, 0, 0);
 					],
 					[ssl_linkable=yes],
 					[ssl_linkable=no])
 					CFLAGS="$saveCFLAGS"
 					LDFLAGS="$saveLDFLAGS"
					LIBS="$saveLIBS"
				fi
 			fi
	 		if test "x$ssl_found" = "xyes" && test "x$ssl_linkable" = "xyes"; then
			 	AC_MSG_RESULT([$dir])
	   			break;
         		fi
		fi	
       fi
    done

    if test "x$ssl_found" != "xyes" ; then
	dnl 
	dnl If no SSL found above, check whether we are running on OpenBSD.
	dnl
	case $host_os in
	openbsd*)
	       if test -f "$erl_xcomp_isysroot/usr/include/openssl/opensslv.h"; then
		  # Trust OpenBSD to have everything the in the correct locations.
		  ssl_found=yes
		  ssl_linkable=yes
		  SSL_INCDIR="$erl_xcomp_sysroot/usr"
	          AC_MSG_RESULT([$SSL_INCDIR])
		  SSL_RUNTIME_LIB="/usr/lib"
		  SSL_LIB="$erl_xcomp_sysroot/usr/lib"
		  SSL_BINDIR="/usr/sbin"
		  dnl OpenBSD requires us to link with -L and -l
		  SSL_DYNAMIC_ONLY="yes" 
		fi
		;;
	esac
    fi
dnl		Now, certain linuxes have a 64bit libcrypto
dnl		that cannot build shared libraries (i.e. not PIC)
dnl		One could argue that this is wrong, but
dnl		so it is - be adoptable
    if test "$ssl_found" = "yes" && test "$ssl_linkable" = "yes" && test "$SSL_DYNAMIC_ONLY" != "yes"; then
	case $host_os in
		linux*)
			saveCFLAGS="$CFLAGS"
 			saveLDFLAGS="$LDFLAGS"
			saveLIBS="$LIBS"
 			CFLAGS="$DED_CFLAGS $SSL_INCLUDE"
 			LDFLAGS="$DED_LDFLAGS"
			LIBS="$SSL_LIBDIR/libcrypto.a $STATIC_ZLIB_LIBS"
 			AC_TRY_LINK([
			#include <stdio.h>
 			#include <openssl/hmac.h>],
 			[ 
			HMAC(0, 0, 0, 0, 0, 0, 0);
 			],
 			[ssl_dyn_linkable=yes],
 			[ssl_dyn_linkable=no])
 			CFLAGS="$saveCFLAGS"
 			LDFLAGS="$saveLDFLAGS"
			LIBS="$saveLIBS"
			if test "x$ssl_dyn_linkable" != "xyes"; then
				SSL_DYNAMIC_ONLY=yes
				AC_MSG_WARN([SSL will be linked against dynamic lib as static lib is not purely relocatable])
			fi
			;;
	esac
    fi					
	
				


    if test "x$ssl_found" != "xyes" || test  "x$ssl_linkable" != "xyes"; then
       if test "x$ssl_found" = "xyes"; then 
       		AC_MSG_RESULT([found; but not usable])
       else
       		AC_MSG_RESULT([no])
       fi
       SSL_APP=
       CRYPTO_APP=
       SSH_APP=
       AC_MSG_WARN([No (usable) OpenSSL found, skipping ssl, ssh and crypto applications])

       for a in ssl crypto ssh; do
           echo "No usable OpenSSL found" > $ERL_TOP/lib/$a/SKIP
       done
    fi
    ;;
  *)
    # Option given with PATH to package
    if test ! -d "$with_ssl" ; then
       AC_MSG_ERROR(Invalid path to option --with-ssl=PATH)
    fi
    if test ! -d "$with_ssl_incl" ; then
       AC_MSG_ERROR(Invalid path to option --with-ssl-incl=PATH)
    fi
    SSL_INCDIR="$with_ssl_incl"
    SSL_CRYPTO_LIBNAME=crypto
    SSL_SSL_LIBNAME=ssl
    if test "x$MIXED_CYGWIN" = "xyes" -o "x$MIXED_MSYS" = "xyes" && test -d "$with_ssl/lib/VC"; then
	if test -f "$with_ssl/lib/VC/libeay32.lib"; then
	    SSL_LIBDIR="$with_ssl/lib/VC"
	    SSL_CRYPTO_LIBNAME=libeay32
	    SSL_SSL_LIBNAME=ssleay32
	elif test -f "$with_ssl/lib/VC/openssl.lib"; then 
	    SSL_LIBDIR="$with_ssl/lib/VC"
	elif test -f $with_ssl/lib/VC/libeay32MD.lib; then
	    SSL_CRYPTO_LIBNAME=libeay32MD
            SSL_SSL_LIBNAME=ssleay32MD
	    if test "x$enable_dynamic_ssl" = "xno" && \
	       test -f  $with_ssl/lib/VC/static/libeay32MD.lib; then
		SSL_LIBDIR="$with_ssl/lib/VC/static"
	    else
		SSL_LIBDIR="$with_ssl/lib/VC"
            fi 
	elif test -f "$with_ssl/lib/libeay32.lib"; then
	    SSL_LIBDIR="$with_ssl/lib"
	    SSL_CRYPTO_LIBNAME=libeay32
	    SSL_SSL_LIBNAME=ssleay32
	else
	    # This probably wont work, but that's what the user said, so...
	    SSL_LIBDIR="$with_ssl/lib"
	fi
    elif test -f "$dir/lib/powerpc/libsslcrypto.a"; then
	    SSL_CRYPTO_LIBNAME=sslcrypto
	    SSL_LIBDIR="$with_ssl/lib/powerpc/"
    elif test "x$ac_cv_sizeof_void_p" = "x8"; then
	if test -f "$with_ssl/lib64/libcrypto.a"; then
		SSL_LIBDIR="$with_ssl/lib64"
	elif test -f "$with_ssl/lib/64/libcrypto.a"; then
		SSL_LIBDIR="$with_ssl/lib/64"
	elif test -f "$with_ssl/lib64/libcrypto.so"; then
		SSL_LIBDIR="$with_ssl/lib64"
	elif test -f "$with_ssl/lib/64/libcrypto.so"; then
		SSL_LIBDIR="$with_ssl/lib/64"
	else
		SSL_LIBDIR="$with_ssl/lib"
	fi
    else	 
	SSL_LIBDIR="$with_ssl/lib"
    fi
    if test '!' -f "${SSL_LIBDIR}/lib${SSL_CRYPTO_LIBNAME}.a"; then
	SSL_DYNAMIC_ONLY=yes
    elif test '!' -f ${SSL_LIBDIR}/lib${SSL_CRYPTO_LIBNAME}.so -a '!' -f "$SSL_LIBDIR/lib${SSL_CRYPTO_LIBNAME}.dylib"; then
	SSL_STATIC_ONLY=yes
    fi
    SSL_INCLUDE="-I$with_ssl_incl/include"
    SSL_APP=ssl
    CRYPTO_APP=crypto
    SSH_APP=ssh
    if test "$cross_compiling" = "yes"; then
	SSL_RUNTIME_LIBDIR=`echo "$SSL_LIBDIR" | sed -n "s|^$erl_xcomp_sysroot\(/*\)\(.*\)\$|/\2|p"`
    else
	SSL_RUNTIME_LIBDIR="$SSL_LIBDIR"
    fi
esac

if test "x$SSL_APP" != "x" ; then
    dnl We found openssl, now check if we use kerberos 5 support
    dnl FIXME: Do we still support platforms that have Kerberos?
    AC_MSG_CHECKING(for OpenSSL kerberos 5 support)
    old_CPPFLAGS=$CPPFLAGS
    CPPFLAGS=$SSL_INCLUDE
    AC_EGREP_CPP(^yes$,[
#include <openssl/opensslv.h>
#include <openssl/opensslconf.h>
#if OPENSSL_VERSION_NUMBER < 0x1010000fL && !defined(OPENSSL_NO_KRB5)
yes
#endif
      ],[
      AC_MSG_RESULT([yes])
      ssl_krb5_enabled=yes
      if test "x$SSL_DYNAMIC_ONLY" != "xyes"; then
          if test -f "$SSL_LIBDIR/libkrb5.a"; then
              SSL_LINK_WITH_KERBEROS=yes
	      STATIC_KERBEROS_LIBS="$SSL_LIBDIR/libkrb5.a"
	      if test -f "$SSL_LIBDIR/libkrb5support.a"; then
		  STATIC_KERBEROS_LIBS="$STATIC_KERBEROS_LIBS $SSL_LIBDIR/libkrb5support.a"
	      fi
	      if test -f "$SSL_LIBDIR/libk5crypto.a"; then
		  STATIC_KERBEROS_LIBS="$STATIC_KERBEROS_LIBS $SSL_LIBDIR/libk5crypto.a"
	      fi
	      if test -f "$SSL_LIBDIR/libresolv.a"; then
		  STATIC_KERBEROS_LIBS="$STATIC_KERBEROS_LIBS $SSL_LIBDIR/libresolv.a"
	      fi
	      if test -f "$SSL_LIBDIR/libcom_err.a"; then
		  STATIC_KERBEROS_LIBS="$STATIC_KERBEROS_LIBS $SSL_LIBDIR/libcom_err.a"
	      fi
          else
	      AC_MSG_WARN([Kerberos needed but no kerberos static libraries found])
	      AC_MSG_WARN([Rescanning for dynamic SSL libraries])
	      enable_dynamic_ssl=yes
	      ssl_done=no
	      SSL_LINK_WITH_KERBEROS=no
	      STATIC_KERBEROS_LIBS=""
	      ssl_krb5_enabled=no
	      SSL_WITH_KERBEROS=no
          fi
      else 	
	      SSL_LINK_WITH_KERBEROS=no
	      STATIC_KERBEROS_LIBS=""
      fi
      ],[
      AC_MSG_RESULT([no])
      ssl_krb5_enabled=no
      SSL_WITH_KERBEROS=no
      ])
    CPPFLAGS=$old_CPPFLAGS
    SSL_KRB5_INCLUDE=
    if test "x$ssl_krb5_enabled" = "xyes" ; then
        AC_MSG_CHECKING(for krb5.h in standard locations)
	for dir in $extra_dir "$SSL_INCDIR/include" "$SSL_INCDIR/include/openssl" \
		"$SSL_INCDIR/include/kerberos" \
		"$erl_xcomp_isysroot/cygdrive/c/kerberos/include" \
		"$erl_xcomp_isysroot/usr/local/kerberos/include" \
		"$erl_xcomp_isysroot/usr/kerberos/include" \
		"$erl_xcomp_isysroot/usr/include"
	do
            if test -f "$dir/krb5.h" ; then
                SSL_KRB5_INCLUDE="$dir"
		break
            fi
        done
        if test "x$SSL_KRB5_INCLUDE" = "x" ; then
	    AC_MSG_RESULT([not found])
	    SSL_APP=
	    CRYPTO_APP=
	    SSH_APP=
	    AC_MSG_WARN([OpenSSL is configured for kerberos but no krb5.h found])
	    for a in ssl crypto ssh ; do
	 	echo "OpenSSL is configured for kerberos but no krb5.h found" > $ERL_TOP/lib/$a/SKIP
	    done
        else
            AC_MSG_RESULT([found in $SSL_KRB5_INCLUDE])
            SSL_INCLUDE="$SSL_INCLUDE -I$SSL_KRB5_INCLUDE"
        fi
    fi
fi

done # while test ssl_done != yes

SSL_DED_LD_RUNTIME_LIBRARY_PATH=
ded_ld_rflg="$DED_LD_FLAG_RUNTIME_LIBRARY_PATH"


case "$with_ssl_rpath" in

yes)   # Use standard lib locations for ssl runtime library path

  if test "$SSL_APP" != "" && test "$SSL_DYNAMIC_ONLY" = "yes" && test "$ded_ld_rflg" != ""; then

    AC_MSG_CHECKING(for ssl runtime library path to use)

    libdirs="/lib"

    if test "$ac_cv_sizeof_void_p" = "8"; then
	dir_lib64=no
	dir_lib_64=no

	case "$SSL_RUNTIME_LIBDIR" in
	    */lib/64 | */lib/64/ ) dir_lib_64=yes;;
	    */lib64 | */lib64/ ) dir_lib64=yes;;
	    *) ;;
	esac

	for dir in $std_ssl_locations; do
	    test $dir_lib_64 = no &&
	    	test -d "$erl_xcomp_sysroot$dir/lib/64" &&
		    dir_lib_64=yes
	    test $dir_lib64 = no &&
		test -d "$erl_xcomp_sysroot$dir/lib64" &&
		    dir_lib64=yes
	done

	test $dir_lib_64 = yes && libdirs="/lib/64 $libdirs"
	test $dir_lib64 = yes && libdirs="/lib64 $libdirs"
    fi

    for type in std x_std curr; do

        ded_ld_rpath="$ded_ld_rflg$SSL_RUNTIME_LIBDIR"
	rpath="$SSL_RUNTIME_LIBDIR"

	if test $type != curr; then
	    for ldir in $libdirs; do
		for dir in $std_ssl_locations; do
		    test "$SSL_LIBDIR" != "$dir$ldir" || continue
		    test $type != x_std || test -d "$dir$ldir" || continue
		    if test "$dir" = "/"; then
			libdir="$ldir"
		    else
			libdir="$dir$ldir"
		    fi
		    ded_ld_rpath="$ded_ld_rpath $ded_ld_rflg$libdir"
		    rpath="$rpath:$libdir"
                done
	    done
	fi

	saveCFLAGS="$CFLAGS"
	saveLDFLAGS="$LDFLAGS"
	saveLIBS="$LIBS"
	CFLAGS="$CFLAGS $SSL_INCLUDE"
	LDFLAGS="$LDFLAGS $ld_rpath -L$SSL_LIBDIR"
	LIBS="-lcrypto"
	AC_TRY_LINK([
                         #include <stdio.h>
                         #include <openssl/hmac.h>
                    ],
                    [ 
			 HMAC(0, 0, 0, 0, 0, 0, 0);
                    ],
                    [rpath_success=yes],
                    [rpath_success=no])
	CFLAGS="$saveCFLAGS"
	LDFLAGS="$saveLDFLAGS"
	LIBS="$saveLIBS"

	test "$rpath_success" = "yes" && break
    done

    test "$rpath_success" = "yes" || { ded_ld_rpath=; rpath=; }

    SSL_DED_LD_RUNTIME_LIBRARY_PATH="$ded_ld_rpath"

    AC_MSG_RESULT([$rpath])
    test "$rpath" != "" || AC_MSG_WARN([Cannot set run path during linking])
  fi
  ;;

no)   # Use no ssl runtime library path
  SSL_DED_LD_RUNTIME_LIBRARY_PATH=
  ;;

*)    # Use ssl runtime library paths set by --with-ssl-rpath (without any check)
  ded_ld_rpath=
  delimit=
  for dir in `echo $with_ssl_rpath | sed "s/,/ /g"`; do
      ded_ld_rpath="$ded_ld_rpath$delimit$ded_ld_rflg$dir"
      delimit=" "
  done
  SSL_DED_LD_RUNTIME_LIBRARY_PATH="$ded_ld_rpath"
  ;;

esac


AC_ARG_ENABLE(fips,
AS_HELP_STRING([--enable-fips], [enable OpenSSL FIPS mode support])
AS_HELP_STRING([--disable-fips], [disable OpenSSL FIPS mode support (default)]),
[ case "$enableval" in
    yes) enable_fips_support=yes ;;
    *)   enable_fips_support=no ;;
  esac ], enable_fips_support=no)

if test "x$enable_fips_support" = "xyes" && test "$CRYPTO_APP" != ""; then
   saveCFLAGS="$CFLAGS"
   saveLDFLAGS="$LDFLAGS"
   saveLIBS="$LIBS"
   CFLAGS="$CFLAGS $SSL_INCLUDE"
   LDFLAGS="$LDFLAGS $ded_ld_rpath -L$SSL_LIBDIR"
   LIBS="-lcrypto"
   AC_CHECK_FUNC([FIPS_mode_set],
   [SSL_FLAGS="-DFIPS_SUPPORT"],
   [SSL_FLAGS=])
   CFLAGS="$saveCFLAGS"
   LDFLAGS="$saveLDFLAGS"
   LIBS="$saveLIBS"
else
   SSL_FLAGS=
fi

AC_SUBST(SSL_INCLUDE)
AC_SUBST(SSL_INCDIR)
AC_SUBST(SSL_LIBDIR)
AC_SUBST(SSL_FLAGS)
AC_SUBST(SSL_CRYPTO_LIBNAME)
AC_SUBST(SSL_SSL_LIBNAME)
AC_SUBST(SSL_DED_LD_RUNTIME_LIBRARY_PATH)
AC_SUBST(SSL_DYNAMIC_ONLY)
AC_SUBST(SSL_LINK_WITH_KERBEROS)
AC_SUBST(STATIC_KERBEROS_LIBS)
AC_SUBST(SSL_LINK_WITH_ZLIB)
AC_SUBST(STATIC_ZLIB_LIBS)

AC_OUTPUT(c_src/$host/Makefile:c_src/Makefile.in)