diff -ru a/unix/configure b/unix/configure

--- unix/configure	2017-09-07 08:54:11.000000000 -0400

+++ unix/configure	2019-08-20 12:55:27.989692823 -0400

@@ -3957,7 +3957,7 @@

 $as_echo "#define _REENTRANT 1" >>confdefs.h

-	if test "`uname -s`" = "SunOS" ; then

+	if test "${target}" = "SunOS" ; then

 $as_echo "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h

@@ -4893,13 +4893,13 @@

 	if test "${TEA_PLATFORM}" = "windows" ; then

 	    tcl_cv_sys_version=windows

 	else

-	    tcl_cv_sys_version=`uname -s`-`uname -r`

+	    tcl_cv_sys_version=${target}-`uname -r`

 	    if test "$?" -ne 0 ; then

 		{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: can't find uname command" >&5

 $as_echo "$as_me: WARNING: can't find uname command" >&2;}

 		tcl_cv_sys_version=unknown

 	    else

-		if test "`uname -s`" = "AIX" ; then

+		if test "${target}" = "AIX" ; then

 		    tcl_cv_sys_version=AIX-`uname -v`.`uname -r`

 		fi

 	    fi

@@ -5718,6 +5718,29 @@

 		LD_SEARCH_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'

 fi

 	    ;;

+	*-midipix-*)

+	    SHLIB_CFLAGS="-fPIC"

+	    SHLIB_SUFFIX=".so"

+

+	    CFLAGS_OPTIMIZE="-O2"

+

+	    SHLIB_LD='${CC} -shared ${CFLAGS} ${LDFLAGS}'

+	    DL_OBJS="tclLoadDl.o"

+	    DL_LIBS="-ldl"

+	    LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}

+	    if test $do64bit = yes; then :

+

+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler accepts -m64 flag" >&5

+$as_echo_n "checking if compiler accepts -m64 flag... " >&6; }

+if ${tcl_cv_cc_m64+:} false; then :

+  $as_echo_n "(cached) " >&6

+else

+  tcl_cv_cc_m64=no

+fi

+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_m64" >&5

+$as_echo "$tcl_cv_cc_m64" >&6; }

+fi

+	    ;;

 	OpenBSD-*)

 	    arch=`arch -s`

 	    case "$arch" in

@@ -7429,7 +7452,7 @@

 fi

-if test "`uname -s`" = "Darwin" && test "${TCL_THREADS}" = 1 && \

+if test "${target}" = "Darwin" && test "${TCL_THREADS}" = 1 && \

 	test "`uname -r | awk -F. '{print $1}'`" -lt 7; then

     # prior to Darwin 7, realpath is not threadsafe, so don't

     # use it when threads are enabled, c.f. bug # 711232

@@ -7937,7 +7960,7 @@

 fi

-    if test "`uname -s`" = "Darwin" && \

+    if test "${target}" = "Darwin" && \

 	    test "`uname -r | awk -F. '{print $1}'`" -gt 5; then

 	# Starting with Darwin 6 (Mac OSX 10.2), gethostbyX

 	# are actually MT-safe as they always return pointers

@@ -7949,7 +7972,7 @@

 $as_echo "#define HAVE_MTSAFE_GETHOSTBYADDR 1" >>confdefs.h

-    elif test "`uname -s`" = "HP-UX" && \

+    elif test "${target}" = "HP-UX" && \

 	      test "`uname -r|sed -e 's|B\.||' -e 's|\..*$||'`" -gt 10; then

         # Starting with HPUX 11.00 (we believe), gethostbyX

         # are actually MT-safe as they always return pointers

@@ -8330,7 +8353,7 @@

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for advanced notifier support" >&5

 $as_echo_n "checking for advanced notifier support... " >&6; }

-case x`uname -s` in

+case x${target} in

   xLinux)

 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: epoll(7)" >&5

 $as_echo "epoll(7)" >&6; }

@@ -9676,7 +9699,7 @@

 # Darwin specific API checks and defines

 #--------------------------------------------------------------------

-if test "`uname -s`" = "Darwin" ; then

+if test "${target}" = "Darwin" ; then

     for ac_func in getattrlist

 do :

   ac_fn_c_check_func "$LINENO" "getattrlist" "ac_cv_func_getattrlist"

@@ -9942,13 +9965,13 @@

 	if test "${TEA_PLATFORM}" = "windows" ; then

 	    tcl_cv_sys_version=windows

 	else

-	    tcl_cv_sys_version=`uname -s`-`uname -r`

+	    tcl_cv_sys_version=${target}-`uname -r`

 	    if test "$?" -ne 0 ; then

 		{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: can't find uname command" >&5

 $as_echo "$as_me: WARNING: can't find uname command" >&2;}

 		tcl_cv_sys_version=unknown

 	    else

-		if test "`uname -s`" = "AIX" ; then

+		if test "${target}" = "AIX" ; then

 		    tcl_cv_sys_version=AIX-`uname -v`.`uname -r`

 		fi

 	    fi

@@ -10133,9 +10156,9 @@

     DTRACE_SRC="\${DTRACE_SRC}"

     DTRACE_HDR="\${DTRACE_HDR}"

-    if test "`uname -s`" != "Darwin" ; then

+    if test "${target}" != "Darwin" ; then

 	DTRACE_OBJ="\${DTRACE_OBJ}"

-	if test "`uname -s`" = "SunOS" -a "$SHARED_BUILD" = "0" ; then

+	if test "${target}" = "SunOS" -a "$SHARED_BUILD" = "0" ; then

 	    # Need to create an intermediate object file to ensure tclDTrace.o

 	    # gets included when linking against the static tcl library.

 	    STLIB_LD='stlib_ld () { /usr/ccs/bin/ld -r -o $${1%.a}.o "$${@:2}" && '"${STLIB_LD}"' $${1} $${1%.a}.o ; } && stlib_ld'

@@ -10219,9 +10242,9 @@

 # AIX remembers this path and will attempt to use it at run-time to look

 # up the Tcl library.

-if test "`uname -s`" = "Darwin" ; then

+if test "${target}" = "Darwin" ; then

-    if test "`uname -s`" = "Darwin" ; then

+    if test "${target}" = "Darwin" ; then

 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to package libraries" >&5

 $as_echo_n "checking how to package libraries... " >&6; }

 	# Check whether --enable-framework was given.

@@ -10319,7 +10342,7 @@

         TCL_LIB_FLAG="-ltcl`echo ${TCL_VERSION} | tr -d .`"

     fi

     TCL_BUILD_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_LIB_FLAG}"

-    TCL_LIB_SPEC="-L${libdir} ${TCL_LIB_FLAG}"

+    TCL_LIB_SPEC="${TCL_LIB_FLAG}"

 fi

 VERSION='${VERSION}'

 eval "CFG_TCL_SHARED_LIB_SUFFIX=${TCL_SHARED_LIB_SUFFIX}"

@@ -10363,12 +10386,12 @@

 fi

 TCL_BUILD_STUB_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_STUB_LIB_FLAG}"

-TCL_STUB_LIB_SPEC="-L${TCL_STUB_LIB_DIR} ${TCL_STUB_LIB_FLAG}"

+TCL_STUB_LIB_SPEC="${TCL_STUB_LIB_FLAG}"

 TCL_BUILD_STUB_LIB_PATH="`pwd`/${TCL_STUB_LIB_FILE}"

 TCL_STUB_LIB_PATH="${TCL_STUB_LIB_DIR}/${TCL_STUB_LIB_FILE}"

 # Install time header dir can be set via --includedir

-eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""

+#eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""

 #------------------------------------------------------------------------

 # tclConfig.sh refers to this by a different name