Various CYGWIN-related fixes. In the win32 configure script, CYGWIN is still not enabled yet, but at least it is a step in the right direction.

4 files changed, 70 insertions, 40 deletions

diff --git a/unix/Makefile.in b/unix/Makefile.in
index f65a2d3..146da43 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -4,7 +4,7 @@
 # "./configure", which is a configuration script generated by the "autoconf"
 # program (constructs like "@foo@" will get replaced in the actual Makefile.
 #
-# RCS: @(#) $Id: Makefile.in,v 1.285 2009/12/17 16:28:21 dgp Exp $
+# RCS: @(#) $Id: Makefile.in,v 1.286 2009/12/21 23:25:40 nijtmans Exp $
 
 VERSION 		= @TCL_VERSION@
 MAJOR_VERSION		= @TCL_MAJOR_VERSION@
@@ -164,7 +164,8 @@ INSTALL_DATA		= ${INSTALL} -m 644
 # make for the first time. Certain build targets (make genstubs) need it to be
 # available on the PATH. This executable should *NOT* be required just to do a
 # normal build although it can be required to run make dist.
-TCL_EXE			= tclsh
+EXE_SUFFIX		= @EXE_SUFFIX@
+TCL_EXE			= tclsh${EXE_SUFFIX}
 
 # The symbols below provide support for dynamic loading and shared libraries.
 # See configure.in for a description of what the symbols mean. The values of
@@ -178,7 +179,6 @@ SHLIB_LD_LIBS		= @SHLIB_LD_LIBS@
 TCL_SHLIB_LD_EXTRAS	= @TCL_SHLIB_LD_EXTRAS@
 
 SHLIB_SUFFIX		= @SHLIB_SUFFIX@
-#SHLIB_SUFFIX		=
 
 DLTEST_TARGETS		= dltest.marker
 
@@ -588,7 +588,7 @@ SRCS = $(GENERIC_SRCS) $(TOMMATH_SRCS) $(UNIX_SRCS) $(NOTIFY_SRCS) \
 
 all: binaries libraries doc packages
 
-binaries: ${LIB_FILE} $(STUB_LIB_FILE) $(TCL_BUILD_EXP_FILE) tclsh
+binaries: ${LIB_FILE} $(STUB_LIB_FILE) $(TCL_BUILD_EXP_FILE) ${TCL_EXE}
 
 libraries:
 
@@ -614,9 +614,9 @@ tclLibObjs:
 # This targets actually build the objects needed for the lib in the above case
 objs: ${OBJS}
 
-tclsh: ${TCLSH_OBJS} ${TCL_LIB_FILE}
+${TCL_EXE}: ${TCLSH_OBJS} ${TCL_LIB_FILE}
 	${CC} ${CFLAGS} ${LDFLAGS} ${TCLSH_OBJS} @TCL_BUILD_LIB_SPEC@ ${LIBS} @EXTRA_TCLSH_LIBS@ \
-		${CC_SEARCH_FLAGS} -o tclsh
+		${CC_SEARCH_FLAGS} -o ${TCL_EXE}
 
 Makefile: $(UNIX_DIR)/Makefile.in $(DLTEST_DIR)/Makefile.in
 	$(SHELL) config.status
@@ -625,7 +625,7 @@ Makefile: $(UNIX_DIR)/Makefile.in $(DLTEST_DIR)/Makefile.in
 
 clean: clean-packages
 	rm -f *.a *.o libtcl* core errs *~ \#* TAGS *.E a.out \
-		errors tclsh tcltest lib.exp Tcl @DTRACE_HDR@
+		errors ${TCL_EXE} tcltest${EXE_SUFFIX} lib.exp Tcl @DTRACE_HDR@
 	cd dltest ; $(MAKE) clean
 
 distclean: distclean-packages clean
@@ -660,12 +660,12 @@ SHELL_ENV =	@LD_LIBRARY_PATH_VAR@=`pwd`:${@LD_LIBRARY_PATH_VAR@} \
 		TCLLIBPATH="@abs_builddir@/pkgs" \
 		TCL_LIBRARY="${TCL_BUILDTIME_LIBRARY}"
 
-tcltest: ${TCLTEST_OBJS} ${TCL_LIB_FILE} ${TCL_STUB_LIB_FILE} ${BUILD_DLTEST}
+tcltest${EXE_SUFFIX}: ${TCLTEST_OBJS} ${TCL_LIB_FILE} ${TCL_STUB_LIB_FILE} ${BUILD_DLTEST}
 	$(MAKE) tcltest-real LIB_RUNTIME_DIR="`pwd`"
 
 tcltest-real:
 	${CC} ${CFLAGS} ${LDFLAGS} ${TCLTEST_OBJS} @TCL_BUILD_LIB_SPEC@ ${TCL_STUB_LIB_FILE} ${LIBS} @EXTRA_TCLSH_LIBS@ \
-		${CC_SEARCH_FLAGS} -o tcltest
+		${CC_SEARCH_FLAGS} -o tcltest${EXE_SUFFIX}
 
 # Note, in the targets below TCL_LIBRARY needs to be set or else "make test"
 # won't work in the case where the compilation directory isn't the same as the
@@ -677,24 +677,24 @@ tcltest-real:
 
 test: test-tcl test-packages
 
-test-tcl: tcltest
-	$(SHELL_ENV) ./tcltest $(TOP_DIR)/tests/all.tcl $(TESTFLAGS)
+test-tcl: tcltest${EXE_SUFFIX}
+	$(SHELL_ENV) ./tcltest${EXE_SUFFIX} $(TOP_DIR)/tests/all.tcl $(TESTFLAGS)
 
-gdb-test: tcltest
+gdb-test: tcltest${EXE_SUFFIX}
 	@echo "set env @LD_LIBRARY_PATH_VAR@=\"`pwd`:$${@LD_LIBRARY_PATH_VAR@}\"" > gdb.run
 	@echo "set env TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> gdb.run
 	@echo "set args $(TOP_DIR)/tests/all.tcl $(TESTFLAGS) -singleproc 1" >> gdb.run
-	$(GDB) ./tcltest --command=gdb.run
+	$(GDB) ./tcltest${EXE_SUFFIX} --command=gdb.run
 	rm gdb.run
 
 # Useful target to launch a built tcltest with the proper path,...
-runtest: tcltest
-	$(SHELL_ENV) ./tcltest
+runtest: tcltest${EXE_SUFFIX}
+	$(SHELL_ENV) ./tcltest${EXE_SUFFIX}
 
 # Useful target for running the test suite with an unwritable current
 # directory...
-ro-test: tcltest
-	echo 'exec chmod -w .;package require tcltest;tcltest::temporaryDirectory /tmp;source ../tests/all.tcl;exec chmod +w .' | $(SHELL_ENV) ./tcltest
+ro-test: tcltest${EXE_SUFFIX}
+	echo 'exec chmod -w .;package require tcltest;tcltest::temporaryDirectory /tmp;source ../tests/all.tcl;exec chmod +w .' | $(SHELL_ENV) ./tcltest${EXE_SUFFIX}
 
 # The following target generates the shared libraries in dltest/ that are used
 # for testing; they are included as part of the "tcltest" target (via the
@@ -711,24 +711,24 @@ dltest.marker: ${STUB_LIB_FILE}
 
 # This target can be used to run tclsh from the build directory
 # via `make shell SCRIPT=/tmp/foo.tcl`
-shell: tclsh
-	$(SHELL_ENV) ./tclsh $(SCRIPT)
+shell: ${TCL_EXE}
+	$(SHELL_ENV) ./${TCL_EXE} $(SCRIPT)
 
 # This target can be used to run tclsh inside either gdb or insight
-gdb: tclsh
-	$(SHELL_ENV) $(GDB) ./tclsh
+gdb: ${TCL_EXE}
+	$(SHELL_ENV) $(GDB) ./${TCL_EXE}
 
 # This target can be used to run tclsh inside ddd
-ddd: tclsh
-	$(SHELL_ENV) $(DDD) ./tclsh
+ddd: ${TCL_EXE}
+	$(SHELL_ENV) $(DDD) ./${TCL_EXE}
 
 VALGRINDARGS=--tool=memcheck --num-callers=8 --leak-resolution=high --leak-check=yes --show-reachable=yes -v
 
-valgrind: tclsh tcltest
-	$(SHELL_ENV) valgrind $(VALGRINDARGS) ./tcltest $(TOP_DIR)/tests/all.tcl -singleproc 1 $(TESTFLAGS)
+valgrind: ${TCL_EXE} tcltest${EXE_SUFFIX}
+	$(SHELL_ENV) valgrind $(VALGRINDARGS) ./tcltest${EXE_SUFFIX} $(TOP_DIR)/tests/all.tcl -singleproc 1 $(TESTFLAGS)
 
-valgrindshell: tclsh
-	$(SHELL_ENV) valgrind $(VALGRINDARGS) ./tclsh $(SCRIPT)
+valgrindshell: ${TCL_EXE}
+	$(SHELL_ENV) valgrind $(VALGRINDARGS) ./${TCL_EXE} $(SCRIPT)
 
 #--------------------------------------------------------------------------
 # Installation rules
@@ -770,7 +770,7 @@ install-binaries: binaries
 			"$(LIB_INSTALL_DIR)"/$(TCL_EXP_FILE); \
 	    fi
 	@echo "Installing tclsh as $(BIN_INSTALL_DIR)/tclsh$(VERSION)"
-	@$(INSTALL_PROGRAM) tclsh "$(BIN_INSTALL_DIR)"/tclsh$(VERSION)
+	@$(INSTALL_PROGRAM) ${TCL_EXE} "$(BIN_INSTALL_DIR)"/tclsh$(VERSION)${EXE_SUFFIX}
 	@echo "Installing tclConfig.sh to $(CONFIG_INSTALL_DIR)/"
 	@$(INSTALL_DATA) tclConfig.sh "$(CONFIG_INSTALL_DIR)"/tclConfig.sh
 	@echo "Installing tclooConfig.sh to $(CONFIG_INSTALL_DIR)/"
@@ -854,18 +854,18 @@ install-libraries: libraries $(INSTALL_TZDATA) install-msgs
 	        "$(SCRIPT_INSTALL_DIR)"/tm.tcl; \
 	fi
 
-install-tzdata: tclsh
+install-tzdata: ${TCL_EXE}
 	@echo "Installing time zone data"
 	@@LD_LIBRARY_PATH_VAR@="`pwd`:$${@LD_LIBRARY_PATH_VAR@}"; export @LD_LIBRARY_PATH_VAR@; \
 	TCL_LIBRARY="${TCL_BUILDTIME_LIBRARY}"; export TCL_LIBRARY; \
-	./tclsh $(TOOL_DIR)/installData.tcl \
+	./${TCL_EXE} $(TOOL_DIR)/installData.tcl \
 	    $(TOP_DIR)/library/tzdata "$(SCRIPT_INSTALL_DIR)"/tzdata
 
-install-msgs: tclsh
+install-msgs: ${TCL_EXE}
 	@echo "Installing message catalogs"
 	@@LD_LIBRARY_PATH_VAR@="`pwd`:$${@LD_LIBRARY_PATH_VAR@}"; export @LD_LIBRARY_PATH_VAR@; \
 	TCL_LIBRARY="${TCL_BUILDTIME_LIBRARY}"; export TCL_LIBRARY; \
-	./tclsh $(TOOL_DIR)/installData.tcl \
+	./${TCL_EXE} $(TOOL_DIR)/installData.tcl \
 	    $(TOP_DIR)/library/msgs "$(SCRIPT_INSTALL_DIR)"/msgs
 
 install-doc: doc
@@ -932,7 +932,7 @@ install-private-headers: libraries
 # tclAppInit.o does not execute concurrently with the renaming and recompiling
 # of that same object file in the targets below.
 
-tclTestInit.o: $(UNIX_DIR)/tclAppInit.c tclsh
+tclTestInit.o: $(UNIX_DIR)/tclAppInit.c ${TCL_EXE}
 	@if test -f tclAppInit.o ; then \
 	    rm -f tclAppInit.sav; \
 	    mv tclAppInit.o tclAppInit.sav; \
@@ -946,7 +946,7 @@ tclTestInit.o: $(UNIX_DIR)/tclAppInit.c tclsh
 	    mv tclAppInit.sav tclAppInit.o; \
 	fi;
 
-xtTestInit.o: $(UNIX_DIR)/tclAppInit.c tclsh
+xtTestInit.o: $(UNIX_DIR)/tclAppInit.c ${TCL_EXE}
 	@if test -f tclAppInit.o ; then \
 	    rm -f tclAppInit.sav; \
 	    mv tclAppInit.o tclAppInit.sav; \
@@ -1674,7 +1674,7 @@ test-packages: tcltest packages
 		  "@LD_LIBRARY_PATH_VAR@=../..:$${@LD_LIBRARY_PATH_VAR@}" \
 		  "TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" \
 		  "TCLLIBPATH=../../pkgs" test \
-		  "TCLSH_PROG=../../tcltest"; ) \
+		  "TCLSH_PROG=../../tcltest${EXE_SUFFIX}"; ) \
 	    fi; \
 	  fi; \
 	done
@@ -2011,20 +2011,20 @@ allpatch: dist
 # to function on those of the Tcl/Tk maintainers.
 #--------------------------------------------------------------------------
 
-html: tclsh
+html: ${TCL_EXE}
 	$(BUILD_HTML)
 	@EXTRA_BUILD_HTML@
-html-tcl: tclsh
+html-tcl: ${TCL_EXE}
 	$(BUILD_HTML) --tcl
 	@EXTRA_BUILD_HTML@
-html-tk: tclsh
+html-tk: ${TCL_EXE}
 	$(BUILD_HTML) --tk
 	@EXTRA_BUILD_HTML@
 
 BUILD_HTML = \
 	@@LD_LIBRARY_PATH_VAR@="`pwd`:$${@LD_LIBRARY_PATH_VAR@}"; export @LD_LIBRARY_PATH_VAR@; \
 	TCL_LIBRARY="${TCL_BUILDTIME_LIBRARY}"; export TCL_LIBRARY; \
-	./tclsh $(TOOL_DIR)/tcltk-man2html.tcl --htmldir="$(HTML_INSTALL_DIR)" \
+	./${TCL_EXE} $(TOOL_DIR)/tcltk-man2html.tcl --htmldir="$(HTML_INSTALL_DIR)" \
 		--srcdir=$(TOP_DIR)/.. $(BUILD_HTML_FLAGS)
 
 #--------------------------------------------------------------------------
diff --git a/unix/configure b/unix/configure
index 991879c..65fcfee 100755
--- a/unix/configure
+++ b/unix/configure
@@ -308,7 +308,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MAN_FLAGS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP TCL_THREADS ZLIB_DIR ZLIB_OBJS ZLIB_SRCS ZLIB_INCLUDE RANLIB ac_ct_RANLIB AR LIBOBJS TCL_LIBS DL_LIBS DL_OBJS PLAT_OBJS PLAT_SRCS LDAIX_SRC CFLAGS_DEBUG CFLAGS_OPTIMIZE CFLAGS_WARNING LDFLAGS_DEBUG LDFLAGS_OPTIMIZE CC_SEARCH_FLAGS LD_SEARCH_FLAGS STLIB_LD SHLIB_LD TCL_SHLIB_LD_EXTRAS TK_SHLIB_LD_EXTRAS SHLIB_LD_LIBS SHLIB_CFLAGS SHLIB_SUFFIX MAKE_LIB MAKE_STUB_LIB INSTALL_LIB INSTALL_STUB_LIB CFLAGS_DEFAULT LDFLAGS_DEFAULT DTRACE TCL_VERSION TCL_MAJOR_VERSION TCL_MINOR_VERSION TCL_PATCH_LEVEL TCL_YEAR PKG_CFG_ARGS TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC TCL_STUB_LIB_PATH TCL_INCLUDE_SPEC TCL_BUILD_STUB_LIB_SPEC TCL_BUILD_STUB_LIB_PATH TCL_SRC_DIR CFG_TCL_SHARED_LIB_SUFFIX CFG_TCL_UNSHARED_LIB_SUFFIX CFG_TCL_EXPORT_FILE_SUFFIX TCL_SHARED_BUILD LD_LIBRARY_PATH_VAR TCL_BUILD_LIB_SPEC TCL_NEEDS_EXP_FILE TCL_BUILD_EXP_FILE TCL_EXP_FILE TCL_LIB_VERSIONS_OK TCL_SHARED_LIB_SUFFIX TCL_UNSHARED_LIB_SUFFIX TCL_HAS_LONGLONG INSTALL_TZDATA DTRACE_SRC DTRACE_HDR DTRACE_OBJ MAKEFILE_SHELL BUILD_DLTEST TCL_PACKAGE_PATH TCL_MODULE_PATH TCL_LIBRARY PRIVATE_INCLUDE_DIR HTML_DIR PACKAGE_DIR EXTRA_CC_SWITCHES EXTRA_APP_CC_SWITCHES EXTRA_INSTALL EXTRA_INSTALL_BINARIES EXTRA_BUILD_HTML EXTRA_TCLSH_LIBS DLTEST_LD DLTEST_SUFFIX'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS MAN_FLAGS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP EGREP TCL_THREADS ZLIB_DIR ZLIB_OBJS ZLIB_SRCS ZLIB_INCLUDE RANLIB ac_ct_RANLIB AR LIBOBJS TCL_LIBS DL_LIBS DL_OBJS PLAT_OBJS PLAT_SRCS LDAIX_SRC CFLAGS_DEBUG CFLAGS_OPTIMIZE CFLAGS_WARNING LDFLAGS_DEBUG LDFLAGS_OPTIMIZE CC_SEARCH_FLAGS LD_SEARCH_FLAGS STLIB_LD SHLIB_LD TCL_SHLIB_LD_EXTRAS TK_SHLIB_LD_EXTRAS SHLIB_LD_LIBS SHLIB_CFLAGS SHLIB_SUFFIX EXE_SUFFIX MAKE_LIB MAKE_STUB_LIB INSTALL_LIB INSTALL_STUB_LIB CFLAGS_DEFAULT LDFLAGS_DEFAULT DTRACE TCL_VERSION TCL_MAJOR_VERSION TCL_MINOR_VERSION TCL_PATCH_LEVEL TCL_YEAR PKG_CFG_ARGS TCL_LIB_FILE TCL_LIB_FLAG TCL_LIB_SPEC TCL_STUB_LIB_FILE TCL_STUB_LIB_FLAG TCL_STUB_LIB_SPEC TCL_STUB_LIB_PATH TCL_INCLUDE_SPEC TCL_BUILD_STUB_LIB_SPEC TCL_BUILD_STUB_LIB_PATH TCL_SRC_DIR CFG_TCL_SHARED_LIB_SUFFIX CFG_TCL_UNSHARED_LIB_SUFFIX CFG_TCL_EXPORT_FILE_SUFFIX TCL_SHARED_BUILD LD_LIBRARY_PATH_VAR TCL_BUILD_LIB_SPEC TCL_NEEDS_EXP_FILE TCL_BUILD_EXP_FILE TCL_EXP_FILE TCL_LIB_VERSIONS_OK TCL_SHARED_LIB_SUFFIX TCL_UNSHARED_LIB_SUFFIX TCL_HAS_LONGLONG INSTALL_TZDATA DTRACE_SRC DTRACE_HDR DTRACE_OBJ MAKEFILE_SHELL BUILD_DLTEST TCL_PACKAGE_PATH TCL_MODULE_PATH TCL_LIBRARY PRIVATE_INCLUDE_DIR HTML_DIR PACKAGE_DIR EXTRA_CC_SWITCHES EXTRA_APP_CC_SWITCHES EXTRA_INSTALL EXTRA_INSTALL_BINARIES EXTRA_BUILD_HTML EXTRA_TCLSH_LIBS DLTEST_LD DLTEST_SUFFIX'
 ac_subst_files=''
 
 # Initialize some variables set by options.
@@ -6624,6 +6624,7 @@ fi
     # Step 3: set configuration options based on system name and version.
 
     do64bit_ok=no
+    EXE_SUFFIX=""
     LDFLAGS_ORIG="$LDFLAGS"
     # When ld needs options to work in 64-bit mode, put them in
     # LDFLAGS_ARCH so they eventually end up in LDFLAGS even if [load]
@@ -7006,6 +7007,17 @@ fi
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
 	    ;;
+	CYGWIN_*)
+	    SHLIB_CFLAGS=""
+	    SHLIB_LD='${CC} -shared'
+	    SHLIB_LD_LIBS='${LIBS}'
+	    SHLIB_SUFFIX=".dll"
+	    EXE_SUFFIX=".exe"
+	    DL_OBJS="tclLoadDl.o"
+	    DL_LIBS="-ldl"
+	    CC_SEARCH_FLAGS=""
+	    LD_SEARCH_FLAGS=""
+	    ;;
 	dgux*)
 	    SHLIB_CFLAGS="-K PIC"
 	    SHLIB_LD='${CC} -G'
@@ -8939,6 +8951,7 @@ fi
 	case $system in
 	    AIX-*) ;;
 	    BSD/OS*) ;;
+	    CYGWIN_*) ;;
 	    IRIX*) ;;
 	    NetBSD-*|FreeBSD-*) ;;
 	    Darwin-*) ;;
@@ -9037,6 +9050,7 @@ fi
 
 
 
+
 cat >>confdefs.h <<_ACEOF
 #define TCL_SHLIB_EXT "${SHLIB_SUFFIX}"
 _ACEOF
@@ -19512,6 +19526,7 @@ s,@TK_SHLIB_LD_EXTRAS@,$TK_SHLIB_LD_EXTRAS,;t t
 s,@SHLIB_LD_LIBS@,$SHLIB_LD_LIBS,;t t
 s,@SHLIB_CFLAGS@,$SHLIB_CFLAGS,;t t
 s,@SHLIB_SUFFIX@,$SHLIB_SUFFIX,;t t
+s,@EXE_SUFFIX@,$EXE_SUFFIX,;t t
 s,@MAKE_LIB@,$MAKE_LIB,;t t
 s,@MAKE_STUB_LIB@,$MAKE_STUB_LIB,;t t
 s,@INSTALL_LIB@,$INSTALL_LIB,;t t
diff --git a/unix/dltest/.cvsignore b/unix/dltest/.cvsignore
index 77ae092..5325f6e 100644
--- a/unix/dltest/.cvsignore
+++ b/unix/dltest/.cvsignore
@@ -1,3 +1,4 @@
 Makefile
 *.bundle
 *.dylib
+*.dll
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 6c23ace..0920e9b 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -1090,6 +1090,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
     # Step 3: set configuration options based on system name and version.
 
     do64bit_ok=no
+    EXE_SUFFIX=""
     LDFLAGS_ORIG="$LDFLAGS"
     # When ld needs options to work in 64-bit mode, put them in
     # LDFLAGS_ARCH so they eventually end up in LDFLAGS even if [load]
@@ -1246,6 +1247,17 @@ dnl AC_CHECK_TOOL(AR, ar)
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
 	    ;;
+	CYGWIN_*)
+	    SHLIB_CFLAGS=""
+	    SHLIB_LD='${CC} -shared'
+	    SHLIB_LD_LIBS='${LIBS}'
+	    SHLIB_SUFFIX=".dll"
+	    EXE_SUFFIX=".exe"
+	    DL_OBJS="tclLoadDl.o"
+	    DL_LIBS="-ldl"
+	    CC_SEARCH_FLAGS=""
+	    LD_SEARCH_FLAGS=""
+	    ;;
 	dgux*)
 	    SHLIB_CFLAGS="-K PIC"
 	    SHLIB_LD='${CC} -G'
@@ -2046,6 +2058,7 @@ dnl # preprocessing tests use only CPPFLAGS.
 	case $system in
 	    AIX-*) ;;
 	    BSD/OS*) ;;
+	    CYGWIN_*) ;;
 	    IRIX*) ;;
 	    NetBSD-*|FreeBSD-*) ;;
 	    Darwin-*) ;;
@@ -2117,6 +2130,7 @@ dnl # preprocessing tests use only CPPFLAGS.
     AC_SUBST(SHLIB_LD_LIBS)
     AC_SUBST(SHLIB_CFLAGS)
     AC_SUBST(SHLIB_SUFFIX)
+    AC_SUBST(EXE_SUFFIX)
     AC_DEFINE_UNQUOTED(TCL_SHLIB_EXT,"${SHLIB_SUFFIX}",
 	[What is the default extension for shared libraries?])