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diff -ru a/unix/configure b/unix/configure
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--- unix/configure	2017-09-07 08:54:11.000000000 -0400
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+++ unix/configure	2019-08-20 12:55:27.989692823 -0400
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
@@ -3957,7 +3957,7 @@
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 $as_echo "#define _REENTRANT 1" >>confdefs.h
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-	if test "`uname -s`" = "SunOS" ; then
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+	if test "${target}" = "SunOS" ; then
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Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 $as_echo "#define _POSIX_PTHREAD_SEMANTICS 1" >>confdefs.h
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@@ -4893,13 +4893,13 @@
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 	if test "${TEA_PLATFORM}" = "windows" ; then
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 	    tcl_cv_sys_version=windows
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 	else
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-	    tcl_cv_sys_version=`uname -s`-`uname -r`
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+	    tcl_cv_sys_version=${target}-`uname -r`
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 	    if test "$?" -ne 0 ; then
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: can't find uname command" >&5
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 $as_echo "$as_me: WARNING: can't find uname command" >&2;}
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 		tcl_cv_sys_version=unknown
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 	    else
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-		if test "`uname -s`" = "AIX" ; then
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+		if test "${target}" = "AIX" ; then
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 		    tcl_cv_sys_version=AIX-`uname -v`.`uname -r`
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 		fi
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 	    fi
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@@ -5718,6 +5718,29 @@
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 		LD_SEARCH_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'
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 fi
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 	    ;;
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+	*-midipix-*)
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+	    SHLIB_CFLAGS="-fPIC"
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+	    SHLIB_SUFFIX=".so"
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+
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+	    CFLAGS_OPTIMIZE="-O2"
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+
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+	    SHLIB_LD='${CC} -shared ${CFLAGS} ${LDFLAGS}'
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+	    DL_OBJS="tclLoadDl.o"
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+	    DL_LIBS="-ldl"
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+	    LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
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+	    if test $do64bit = yes; then :
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+
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+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler accepts -m64 flag" >&5
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+$as_echo_n "checking if compiler accepts -m64 flag... " >&6; }
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+if ${tcl_cv_cc_m64+:} false; then :
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+  $as_echo_n "(cached) " >&6
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+else
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+  tcl_cv_cc_m64=no
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+fi
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+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_m64" >&5
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+$as_echo "$tcl_cv_cc_m64" >&6; }
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+fi
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+	    ;;
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 	OpenBSD-*)
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 	    arch=`arch -s`
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 	    case "$arch" in
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@@ -7429,7 +7452,7 @@
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 fi
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-if test "`uname -s`" = "Darwin" && test "${TCL_THREADS}" = 1 && \
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+if test "${target}" = "Darwin" && test "${TCL_THREADS}" = 1 && \
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 	test "`uname -r | awk -F. '{print $1}'`" -lt 7; then
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     # prior to Darwin 7, realpath is not threadsafe, so don't
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     # use it when threads are enabled, c.f. bug # 711232
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@@ -7937,7 +7960,7 @@
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 fi
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-    if test "`uname -s`" = "Darwin" && \
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+    if test "${target}" = "Darwin" && \
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 	    test "`uname -r | awk -F. '{print $1}'`" -gt 5; then
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 	# Starting with Darwin 6 (Mac OSX 10.2), gethostbyX
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 	# are actually MT-safe as they always return pointers
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@@ -7949,7 +7972,7 @@
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 $as_echo "#define HAVE_MTSAFE_GETHOSTBYADDR 1" >>confdefs.h
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-    elif test "`uname -s`" = "HP-UX" && \
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+    elif test "${target}" = "HP-UX" && \
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 	      test "`uname -r|sed -e 's|B\.||' -e 's|\..*$||'`" -gt 10; then
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         # Starting with HPUX 11.00 (we believe), gethostbyX
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         # are actually MT-safe as they always return pointers
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@@ -8330,7 +8353,7 @@
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for advanced notifier support" >&5
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 $as_echo_n "checking for advanced notifier support... " >&6; }
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-case x`uname -s` in
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+case x${target} in
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
   xLinux)
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 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: epoll(7)" >&5
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 $as_echo "epoll(7)" >&6; }
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@@ -9676,7 +9699,7 @@
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 # Darwin specific API checks and defines
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 #--------------------------------------------------------------------
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-if test "`uname -s`" = "Darwin" ; then
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+if test "${target}" = "Darwin" ; then
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     for ac_func in getattrlist
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 do :
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   ac_fn_c_check_func "$LINENO" "getattrlist" "ac_cv_func_getattrlist"
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@@ -9942,13 +9965,13 @@
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 	if test "${TEA_PLATFORM}" = "windows" ; then
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 	    tcl_cv_sys_version=windows
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 	else
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-	    tcl_cv_sys_version=`uname -s`-`uname -r`
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+	    tcl_cv_sys_version=${target}-`uname -r`
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 	    if test "$?" -ne 0 ; then
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: can't find uname command" >&5
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 $as_echo "$as_me: WARNING: can't find uname command" >&2;}
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 		tcl_cv_sys_version=unknown
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 	    else
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-		if test "`uname -s`" = "AIX" ; then
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+		if test "${target}" = "AIX" ; then
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 		    tcl_cv_sys_version=AIX-`uname -v`.`uname -r`
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 		fi
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 	    fi
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@@ -10133,9 +10156,9 @@
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     DTRACE_SRC="\${DTRACE_SRC}"
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     DTRACE_HDR="\${DTRACE_HDR}"
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-    if test "`uname -s`" != "Darwin" ; then
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+    if test "${target}" != "Darwin" ; then
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 	DTRACE_OBJ="\${DTRACE_OBJ}"
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-	if test "`uname -s`" = "SunOS" -a "$SHARED_BUILD" = "0" ; then
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+	if test "${target}" = "SunOS" -a "$SHARED_BUILD" = "0" ; then
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 	    # Need to create an intermediate object file to ensure tclDTrace.o
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 	    # gets included when linking against the static tcl library.
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 	    STLIB_LD='stlib_ld () { /usr/ccs/bin/ld -r -o $${1%.a}.o "$${@:2}" && '"${STLIB_LD}"' $${1} $${1%.a}.o ; } && stlib_ld'
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@@ -10219,9 +10242,9 @@
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 # AIX remembers this path and will attempt to use it at run-time to look
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 # up the Tcl library.
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Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
-if test "`uname -s`" = "Darwin" ; then
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+if test "${target}" = "Darwin" ; then
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
-    if test "`uname -s`" = "Darwin" ; then
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+    if test "${target}" = "Darwin" ; then
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to package libraries" >&5
Lucio Andrés Illanes Albornoz (arab, vxp) f14ffc
 $as_echo_n "checking how to package libraries... " >&6; }
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 	# Check whether --enable-framework was given.
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@@ -10319,7 +10342,7 @@
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         TCL_LIB_FLAG="-ltcl`echo ${TCL_VERSION} | tr -d .`"
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     fi
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     TCL_BUILD_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_LIB_FLAG}"
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-    TCL_LIB_SPEC="-L${libdir} ${TCL_LIB_FLAG}"
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+    TCL_LIB_SPEC="${TCL_LIB_FLAG}"
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 fi
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 VERSION='${VERSION}'
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 eval "CFG_TCL_SHARED_LIB_SUFFIX=${TCL_SHARED_LIB_SUFFIX}"
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@@ -10363,12 +10386,12 @@
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 fi
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 TCL_BUILD_STUB_LIB_SPEC="-L`pwd | sed -e 's/ /\\\\ /g'` ${TCL_STUB_LIB_FLAG}"
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-TCL_STUB_LIB_SPEC="-L${TCL_STUB_LIB_DIR} ${TCL_STUB_LIB_FLAG}"
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+TCL_STUB_LIB_SPEC="${TCL_STUB_LIB_FLAG}"
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 TCL_BUILD_STUB_LIB_PATH="`pwd`/${TCL_STUB_LIB_FILE}"
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 TCL_STUB_LIB_PATH="${TCL_STUB_LIB_DIR}/${TCL_STUB_LIB_FILE}"
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 # Install time header dir can be set via --includedir
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-eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""
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+#eval "TCL_INCLUDE_SPEC=\"-I${includedir}\""
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 #------------------------------------------------------------------------
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 # tclConfig.sh refers to this by a different name