configure.in -> configure.ac

8 files changed, 46 insertions, 46 deletions

diff --git a/generic/tk.h b/generic/tk.h
index 6abb05e..f51d793 100644
--- a/generic/tk.h
+++ b/generic/tk.h
@@ -59,8 +59,8 @@ extern "C" {
  * and update the version numbers:
  *
  * library/tk.tcl	(1 LOC patch)
- * unix/configure.in	(2 LOC Major, 2 LOC minor, 1 LOC patch)
- * win/configure.in	(as above)
+ * unix/configure.ac	(2 LOC Major, 2 LOC minor, 1 LOC patch)
+ * win/configure.ac	(as above)
  * README		(sections 0 and 1)
  * macosx/Tk-Common.xcconfig (not patchlevel) 1 LOC
  * win/README		(not patchlevel)
diff --git a/macosx/GNUmakefile b/macosx/GNUmakefile
index d0bab1a..57d0206 100644
--- a/macosx/GNUmakefile
+++ b/macosx/GNUmakefile
@@ -102,7 +102,7 @@ PROJECT			:= tk
 PRODUCT_NAME		:= Tk
 
 UNIX_DIR		:= ${CURDIR}/../unix
-VERSION			:= $(shell awk -F= '/^TK_VERSION/ {print $$2; nextfile}' ${UNIX_DIR}/configure.in)
+VERSION			:= $(shell awk -F= '/^TK_VERSION/ {print $$2; nextfile}' ${UNIX_DIR}/configure.ac)
 TCL_VERSION		:= ${VERSION}
 wish			:= wish
 WISH			= wish${VERSION}
diff --git a/macosx/Tk.xcode/project.pbxproj b/macosx/Tk.xcode/project.pbxproj
index 70c2472..eee37a2 100644
--- a/macosx/Tk.xcode/project.pbxproj
+++ b/macosx/Tk.xcode/project.pbxproj
@@ -1172,7 +1172,7 @@
 		F966BC6A08F27A3D005CB29B /* xmfbox.test */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = xmfbox.test; sourceTree = "<group>"; };
 		F966BC6C08F27A3D005CB29B /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F966BC6D08F27A3D005CB29B /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F966BC6E08F27A3D005CB29B /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F966BC6E08F27A3D005CB29B /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F966BC6F08F27A3D005CB29B /* install-sh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = "install-sh"; sourceTree = "<group>"; };
 		F966BC7008F27A3D005CB29B /* installManPage */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = installManPage; sourceTree = "<group>"; };
 		F966BC7108F27A3D005CB29B /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
@@ -1211,7 +1211,7 @@
 		F966BC9408F27A3D005CB29B /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F966BC9508F27A3D005CB29B /* buildall.vc.bat */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = buildall.vc.bat; sourceTree = "<group>"; };
 		F966BC9608F27A3E005CB29B /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F966BC9708F27A3E005CB29B /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F966BC9708F27A3E005CB29B /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F966BC9808F27A3E005CB29B /* makefile.bc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.bc; sourceTree = "<group>"; };
 		F966BC9908F27A3E005CB29B /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F966BC9A08F27A3E005CB29B /* makefile.vc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.vc; sourceTree = "<group>"; };
@@ -1916,7 +1916,7 @@
 		F96D43CF08F272B7004A47F5 /* winTime.test */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = winTime.test; sourceTree = "<group>"; };
 		F96D43D108F272B8004A47F5 /* checkLibraryDoc.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = checkLibraryDoc.tcl; sourceTree = "<group>"; };
 		F96D43D208F272B8004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D43D308F272B8004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D43D308F272B8004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D442208F272B8004A47F5 /* eolFix.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = eolFix.tcl; sourceTree = "<group>"; };
 		F96D442408F272B8004A47F5 /* fix_tommath_h.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = fix_tommath_h.tcl; sourceTree = "<group>"; };
 		F96D442508F272B8004A47F5 /* genStubs.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = genStubs.tcl; sourceTree = "<group>"; };
@@ -1941,7 +1941,7 @@
 		F96D443C08F272B9004A47F5 /* uniParse.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = uniParse.tcl; sourceTree = "<group>"; };
 		F96D444008F272B9004A47F5 /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F96D444108F272B9004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D444208F272B9004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D444208F272B9004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D444408F272B9004A47F5 /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F96D444508F272B9004A47F5 /* pkga.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pkga.c; sourceTree = "<group>"; };
 		F96D444608F272B9004A47F5 /* pkgb.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pkgb.c; sourceTree = "<group>"; };
@@ -1986,7 +1986,7 @@
 		F96D447208F272BA004A47F5 /* cat.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = cat.c; sourceTree = "<group>"; };
 		F96D447308F272BA004A47F5 /* coffbase.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = coffbase.txt; sourceTree = "<group>"; };
 		F96D447408F272BA004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D447508F272BA004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D447508F272BA004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D447608F272BA004A47F5 /* makefile.bc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.bc; sourceTree = "<group>"; };
 		F96D447708F272BA004A47F5 /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F96D447808F272BA004A47F5 /* makefile.vc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.vc; sourceTree = "<group>"; };
@@ -2743,7 +2743,7 @@
 			children = (
 				F966BC6C08F27A3D005CB29B /* aclocal.m4 */,
 				F966BC6D08F27A3D005CB29B /* configure */,
-				F966BC6E08F27A3D005CB29B /* configure.in */,
+				F966BC6E08F27A3D005CB29B /* configure.ac */,
 				F966BC6F08F27A3D005CB29B /* install-sh */,
 				F966BC7008F27A3D005CB29B /* installManPage */,
 				F966BC7108F27A3D005CB29B /* Makefile.in */,
@@ -2790,7 +2790,7 @@
 				F966BC9408F27A3D005CB29B /* aclocal.m4 */,
 				F966BC9508F27A3D005CB29B /* buildall.vc.bat */,
 				F966BC9608F27A3E005CB29B /* configure */,
-				F966BC9708F27A3E005CB29B /* configure.in */,
+				F966BC9708F27A3E005CB29B /* configure.ac */,
 				F966BC9808F27A3E005CB29B /* makefile.bc */,
 				F966BC9908F27A3E005CB29B /* Makefile.in */,
 				F966BC9A08F27A3E005CB29B /* makefile.vc */,
@@ -3726,7 +3726,7 @@
 			children = (
 				F96D43D108F272B8004A47F5 /* checkLibraryDoc.tcl */,
 				F96D43D208F272B8004A47F5 /* configure */,
-				F96D43D308F272B8004A47F5 /* configure.in */,
+				F96D43D308F272B8004A47F5 /* configure.ac */,
 				F96D442208F272B8004A47F5 /* eolFix.tcl */,
 				F96D442408F272B8004A47F5 /* fix_tommath_h.tcl */,
 				F96D442508F272B8004A47F5 /* genStubs.tcl */,
@@ -3759,7 +3759,7 @@
 			children = (
 				F96D444008F272B9004A47F5 /* aclocal.m4 */,
 				F96D444108F272B9004A47F5 /* configure */,
-				F96D444208F272B9004A47F5 /* configure.in */,
+				F96D444208F272B9004A47F5 /* configure.ac */,
 				F96D444308F272B9004A47F5 /* dltest */,
 				F96D444D08F272B9004A47F5 /* install-sh */,
 				F96D444E08F272B9004A47F5 /* installManPage */,
@@ -3821,7 +3821,7 @@
 				F96D447208F272BA004A47F5 /* cat.c */,
 				F96D447308F272BA004A47F5 /* coffbase.txt */,
 				F96D447408F272BA004A47F5 /* configure */,
-				F96D447508F272BA004A47F5 /* configure.in */,
+				F96D447508F272BA004A47F5 /* configure.ac */,
 				F96D447608F272BA004A47F5 /* makefile.bc */,
 				F96D447708F272BA004A47F5 /* Makefile.in */,
 				F96D447808F272BA004A47F5 /* makefile.vc */,
@@ -3974,7 +3974,7 @@
 			);
 			inputPaths = (
 				"$(TCL_SRCROOT)/macosx/configure.ac",
-				"$(TCL_SRCROOT)/unix/configure.in",
+				"$(TCL_SRCROOT)/unix/configure.ac",
 				"$(TCL_SRCROOT)/unix/tcl.m4",
 				"$(TCL_SRCROOT)/unix/aclocal.m4",
 				"$(TCL_SRCROOT)/unix/tclConfig.sh.in",
@@ -3987,7 +3987,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9A5C5F608F651AB008AE941 /* Configure Tk */ = {
@@ -3997,7 +3997,7 @@
 			);
 			inputPaths = (
 				"$(TK_SRCROOT)/macosx/configure.ac",
-				"$(TK_SRCROOT)/unix/configure.in",
+				"$(TK_SRCROOT)/unix/configure.ac",
 				"$(TK_SRCROOT)/unix/tcl.m4",
 				"$(TK_SRCROOT)/unix/aclocal.m4",
 				"$(TK_SRCROOT)/unix/tkConfig.sh.in",
@@ -4008,7 +4008,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-aqua --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-aqua --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9FD30B40CC1AD070073837D /* Configure Tcl */ = {
@@ -4018,7 +4018,7 @@
 			);
 			inputPaths = (
 				"$(TCL_SRCROOT)/macosx/configure.ac",
-				"$(TCL_SRCROOT)/unix/configure.in",
+				"$(TCL_SRCROOT)/unix/configure.ac",
 				"$(TCL_SRCROOT)/unix/tcl.m4",
 				"$(TCL_SRCROOT)/unix/aclocal.m4",
 				"$(TCL_SRCROOT)/unix/tclConfig.sh.in",
@@ -4031,7 +4031,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9FD30B50CC1AD070073837D /* Configure Tk */ = {
@@ -4041,7 +4041,7 @@
 			);
 			inputPaths = (
 				"$(TK_SRCROOT)/macosx/configure.ac",
-				"$(TK_SRCROOT)/unix/configure.in",
+				"$(TK_SRCROOT)/unix/configure.ac",
 				"$(TK_SRCROOT)/unix/tcl.m4",
 				"$(TK_SRCROOT)/unix/aclocal.m4",
 				"$(TK_SRCROOT)/unix/tkConfig.sh.in",
@@ -4052,7 +4052,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    PATH=\"${PATH}:/usr/X11R6/bin\" \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-xft --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi";
+			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    PATH=\"${PATH}:/usr/X11R6/bin\" \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-xft --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
diff --git a/macosx/Tk.xcodeproj/project.pbxproj b/macosx/Tk.xcodeproj/project.pbxproj
index dcfe9fb..2f7edba 100644
--- a/macosx/Tk.xcodeproj/project.pbxproj
+++ b/macosx/Tk.xcodeproj/project.pbxproj
@@ -1172,7 +1172,7 @@
 		F966BC6A08F27A3D005CB29B /* xmfbox.test */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = xmfbox.test; sourceTree = "<group>"; };
 		F966BC6C08F27A3D005CB29B /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F966BC6D08F27A3D005CB29B /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F966BC6E08F27A3D005CB29B /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F966BC6E08F27A3D005CB29B /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F966BC6F08F27A3D005CB29B /* install-sh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = "install-sh"; sourceTree = "<group>"; };
 		F966BC7008F27A3D005CB29B /* installManPage */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = installManPage; sourceTree = "<group>"; };
 		F966BC7108F27A3D005CB29B /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
@@ -1211,7 +1211,7 @@
 		F966BC9408F27A3D005CB29B /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F966BC9508F27A3D005CB29B /* buildall.vc.bat */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = buildall.vc.bat; sourceTree = "<group>"; };
 		F966BC9608F27A3E005CB29B /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F966BC9708F27A3E005CB29B /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F966BC9708F27A3E005CB29B /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F966BC9808F27A3E005CB29B /* makefile.bc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.bc; sourceTree = "<group>"; };
 		F966BC9908F27A3E005CB29B /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F966BC9A08F27A3E005CB29B /* makefile.vc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.vc; sourceTree = "<group>"; };
@@ -1916,7 +1916,7 @@
 		F96D43CF08F272B7004A47F5 /* winTime.test */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = winTime.test; sourceTree = "<group>"; };
 		F96D43D108F272B8004A47F5 /* checkLibraryDoc.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = checkLibraryDoc.tcl; sourceTree = "<group>"; };
 		F96D43D208F272B8004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D43D308F272B8004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D43D308F272B8004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D442208F272B8004A47F5 /* eolFix.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = eolFix.tcl; sourceTree = "<group>"; };
 		F96D442408F272B8004A47F5 /* fix_tommath_h.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = fix_tommath_h.tcl; sourceTree = "<group>"; };
 		F96D442508F272B8004A47F5 /* genStubs.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = genStubs.tcl; sourceTree = "<group>"; };
@@ -1941,7 +1941,7 @@
 		F96D443C08F272B9004A47F5 /* uniParse.tcl */ = {isa = PBXFileReference; explicitFileType = text.script; fileEncoding = 4; path = uniParse.tcl; sourceTree = "<group>"; };
 		F96D444008F272B9004A47F5 /* aclocal.m4 */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = aclocal.m4; sourceTree = "<group>"; };
 		F96D444108F272B9004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D444208F272B9004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D444208F272B9004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D444408F272B9004A47F5 /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F96D444508F272B9004A47F5 /* pkga.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pkga.c; sourceTree = "<group>"; };
 		F96D444608F272B9004A47F5 /* pkgb.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = pkgb.c; sourceTree = "<group>"; };
@@ -1986,7 +1986,7 @@
 		F96D447208F272BA004A47F5 /* cat.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = cat.c; sourceTree = "<group>"; };
 		F96D447308F272BA004A47F5 /* coffbase.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = coffbase.txt; sourceTree = "<group>"; };
 		F96D447408F272BA004A47F5 /* configure */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = configure; sourceTree = "<group>"; };
-		F96D447508F272BA004A47F5 /* configure.in */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.in; sourceTree = "<group>"; };
+		F96D447508F272BA004A47F5 /* configure.ac */ = {isa = PBXFileReference; explicitFileType = text.script.sh; fileEncoding = 4; path = configure.ac; sourceTree = "<group>"; };
 		F96D447608F272BA004A47F5 /* makefile.bc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.bc; sourceTree = "<group>"; };
 		F96D447708F272BA004A47F5 /* Makefile.in */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = Makefile.in; sourceTree = "<group>"; };
 		F96D447808F272BA004A47F5 /* makefile.vc */ = {isa = PBXFileReference; explicitFileType = sourcecode.make; fileEncoding = 4; path = makefile.vc; sourceTree = "<group>"; };
@@ -2743,7 +2743,7 @@
 			children = (
 				F966BC6C08F27A3D005CB29B /* aclocal.m4 */,
 				F966BC6D08F27A3D005CB29B /* configure */,
-				F966BC6E08F27A3D005CB29B /* configure.in */,
+				F966BC6E08F27A3D005CB29B /* configure.ac */,
 				F966BC6F08F27A3D005CB29B /* install-sh */,
 				F966BC7008F27A3D005CB29B /* installManPage */,
 				F966BC7108F27A3D005CB29B /* Makefile.in */,
@@ -2790,7 +2790,7 @@
 				F966BC9408F27A3D005CB29B /* aclocal.m4 */,
 				F966BC9508F27A3D005CB29B /* buildall.vc.bat */,
 				F966BC9608F27A3E005CB29B /* configure */,
-				F966BC9708F27A3E005CB29B /* configure.in */,
+				F966BC9708F27A3E005CB29B /* configure.ac */,
 				F966BC9808F27A3E005CB29B /* makefile.bc */,
 				F966BC9908F27A3E005CB29B /* Makefile.in */,
 				F966BC9A08F27A3E005CB29B /* makefile.vc */,
@@ -3726,7 +3726,7 @@
 			children = (
 				F96D43D108F272B8004A47F5 /* checkLibraryDoc.tcl */,
 				F96D43D208F272B8004A47F5 /* configure */,
-				F96D43D308F272B8004A47F5 /* configure.in */,
+				F96D43D308F272B8004A47F5 /* configure.ac */,
 				F96D442208F272B8004A47F5 /* eolFix.tcl */,
 				F96D442408F272B8004A47F5 /* fix_tommath_h.tcl */,
 				F96D442508F272B8004A47F5 /* genStubs.tcl */,
@@ -3759,7 +3759,7 @@
 			children = (
 				F96D444008F272B9004A47F5 /* aclocal.m4 */,
 				F96D444108F272B9004A47F5 /* configure */,
-				F96D444208F272B9004A47F5 /* configure.in */,
+				F96D444208F272B9004A47F5 /* configure.ac */,
 				F96D444308F272B9004A47F5 /* dltest */,
 				F96D444D08F272B9004A47F5 /* install-sh */,
 				F96D444E08F272B9004A47F5 /* installManPage */,
@@ -3821,7 +3821,7 @@
 				F96D447208F272BA004A47F5 /* cat.c */,
 				F96D447308F272BA004A47F5 /* coffbase.txt */,
 				F96D447408F272BA004A47F5 /* configure */,
-				F96D447508F272BA004A47F5 /* configure.in */,
+				F96D447508F272BA004A47F5 /* configure.ac */,
 				F96D447608F272BA004A47F5 /* makefile.bc */,
 				F96D447708F272BA004A47F5 /* Makefile.in */,
 				F96D447808F272BA004A47F5 /* makefile.vc */,
@@ -3977,7 +3977,7 @@
 			);
 			inputPaths = (
 				"$(TCL_SRCROOT)/macosx/configure.ac",
-				"$(TCL_SRCROOT)/unix/configure.in",
+				"$(TCL_SRCROOT)/unix/configure.ac",
 				"$(TCL_SRCROOT)/unix/tcl.m4",
 				"$(TCL_SRCROOT)/unix/aclocal.m4",
 				"$(TCL_SRCROOT)/unix/tclConfig.sh.in",
@@ -3990,7 +3990,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9A5C5F608F651AB008AE941 /* Configure Tk */ = {
@@ -4000,7 +4000,7 @@
 			);
 			inputPaths = (
 				"$(TK_SRCROOT)/macosx/configure.ac",
-				"$(TK_SRCROOT)/unix/configure.in",
+				"$(TK_SRCROOT)/unix/configure.ac",
 				"$(TK_SRCROOT)/unix/tcl.m4",
 				"$(TK_SRCROOT)/unix/aclocal.m4",
 				"$(TK_SRCROOT)/unix/tkConfig.sh.in",
@@ -4011,7 +4011,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-aqua --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-aqua --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9FD30B40CC1AD070073837D /* Configure Tcl */ = {
@@ -4021,7 +4021,7 @@
 			);
 			inputPaths = (
 				"$(TCL_SRCROOT)/macosx/configure.ac",
-				"$(TCL_SRCROOT)/unix/configure.in",
+				"$(TCL_SRCROOT)/unix/configure.ac",
 				"$(TCL_SRCROOT)/unix/tcl.m4",
 				"$(TCL_SRCROOT)/unix/aclocal.m4",
 				"$(TCL_SRCROOT)/unix/tclConfig.sh.in",
@@ -4034,7 +4034,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
+			shellScript = "## tcl configure shell script phase\n\ncd \"${TCL_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tcl/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tcl && cd tcl &&\nif [ \"${TCL_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tcl\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    \"${TCL_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		F9FD30B50CC1AD070073837D /* Configure Tk */ = {
@@ -4044,7 +4044,7 @@
 			);
 			inputPaths = (
 				"$(TK_SRCROOT)/macosx/configure.ac",
-				"$(TK_SRCROOT)/unix/configure.in",
+				"$(TK_SRCROOT)/unix/configure.ac",
 				"$(TK_SRCROOT)/unix/tcl.m4",
 				"$(TK_SRCROOT)/unix/aclocal.m4",
 				"$(TK_SRCROOT)/unix/tkConfig.sh.in",
@@ -4055,7 +4055,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/bash;
-			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.in -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    PATH=\"${PATH}:/usr/X11R6/bin\" \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-xft --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi";
+			shellScript = "## tk configure shell script phase\n\ncd \"${TK_SRCROOT}\"/macosx &&\nif [ configure.ac -nt configure -o ../unix/configure.ac -nt configure -o ../unix/tcl.m4 -nt configure -o ../unix/aclocal.m4 -nt configure ]; then\n    echo \"Running autoconf & autoheader in tk/macosx\"\n    rm -rf autom4te.cache\n    ${AUTOCONF:-${DEVELOPER_DIR}/usr/bin/autoconf} && ${AUTOHEADER:-${DEVELOPER_DIR}/usr/bin/autoheader} || exit $?\n    rm -rf autom4te.cache\nfi\n\ncd \"${DERIVED_FILE_DIR}\" && mkdir -p tk && cd tk &&\nif [ \"${TK_SRCROOT}\"/macosx/configure -nt config.status ]; then\n    echo \"Configuring Tk\"\n    CC=$(xcrun -find ${GCC} || echo ${GCC})\n    PATH=\"${PATH}:/usr/X11R6/bin\" \"${TK_SRCROOT}\"/macosx/configure --cache-file=../config.cache --prefix=${PREFIX} --bindir=${BINDIR} --libdir=${LIBDIR} --mandir=${MANDIR} --includedir=${INCLUDEDIR} --disable-shared --enable-xft --with-tcl=../tcl CC=${CC} LD=${CC} ${CONFIGURE_ARGS}\nelse\n    ./config.status\nfi";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
diff --git a/macosx/configure.ac b/macosx/configure.ac
index 69573c5..41f39d6 100644
--- a/macosx/configure.ac
+++ b/macosx/configure.ac
@@ -8,4 +8,4 @@ dnl	include the configure sources from ../unix:
 
 m4_include(../unix/aclocal.m4)
 m4_define(SC_USE_CONFIG_HEADERS)
-m4_include(../unix/configure.in)
+m4_include(../unix/configure.ac)
diff --git a/unix/Makefile.in b/unix/Makefile.in
index 96f1408..a4bc2d4 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -227,7 +227,7 @@ INSTALL_DATA		= ${INSTALL} -m 644
 INSTALL_DATA_DIR	= ${INSTALL} -d -m 755
 
 # The symbol below provides support for dynamic loading and shared
-# libraries.  See configure.in for a description of what it means.
+# libraries.  See configure.ac for a description of what it means.
 # The value of the symbol is normally set by the configure script.
 
 SHLIB_CFLAGS		= @SHLIB_CFLAGS@ -DBUILD_tk
@@ -266,7 +266,7 @@ LIBS = @LIBS@ $(X11_LIB_SWITCHES) @TCL_LIBS@
 WISH_LIBS = $(TCL_LIB_SPEC) @LIBS@ $(X11_LIB_SWITCHES) @TCL_LIBS@ @EXTRA_WISH_LIBS@
 
 # The symbols below provide support for dynamic loading and shared
-# libraries.  See configure.in for a description of what the
+# libraries.  See configure.ac for a description of what the
 # symbols mean.  The values of the symbols are normally set by the
 # configure script.  You shouldn't normally need to modify any of
 # these definitions by hand.
@@ -1528,7 +1528,7 @@ DISTNAME = tk${VERSION}${PATCH_LEVEL}
 ZIPNAME	 = tk${MAJOR_VERSION}${MINOR_VERSION}${PATCH_LEVEL}-src.zip
 DISTDIR	 = $(DISTROOT)/$(DISTNAME)
 TCLDIR   = @TCL_SRC_DIR@
-$(UNIX_DIR)/configure: $(UNIX_DIR)/configure.in $(UNIX_DIR)/tcl.m4 \
+$(UNIX_DIR)/configure: $(UNIX_DIR)/configure.ac $(UNIX_DIR)/tcl.m4 \
 		$(UNIX_DIR)/aclocal.m4
 	cd $(UNIX_DIR); autoconf
 $(MAC_OSX_DIR)/configure: $(MAC_OSX_DIR)/configure.ac $(UNIX_DIR)/configure
@@ -1542,12 +1542,12 @@ dist:   $(UNIX_DIR)/configure $(UNIX_DIR)/tkConfig.h.in $(UNIX_DIR)/tk.pc.in $(M
 	cp -p $(UNIX_DIR)/*.c $(UNIX_DIR)/*.h $(DISTDIR)/unix
 	cp $(TOP_DIR)/license.terms $(UNIX_DIR)/Makefile.in $(DISTDIR)/unix
 	chmod 664 $(DISTDIR)/unix/Makefile.in
-	cp $(UNIX_DIR)/configure $(UNIX_DIR)/configure.in $(UNIX_DIR)/tk.spec \
+	cp $(UNIX_DIR)/configure $(UNIX_DIR)/configure.ac $(UNIX_DIR)/tk.spec \
 		$(UNIX_DIR)/aclocal.m4 $(UNIX_DIR)/tcl.m4 \
 		$(UNIX_DIR)/tkConfig.sh.in $(TCLDIR)/unix/install-sh \
 		$(UNIX_DIR)/README $(UNIX_DIR)/installManPage \
 		$(UNIX_DIR)/tkConfig.h.in $(UNIX_DIR)/tk.pc.in $(DISTDIR)/unix
-	chmod 775 $(DISTDIR)/unix/configure $(DISTDIR)/unix/configure.in
+	chmod 775 $(DISTDIR)/unix/configure $(DISTDIR)/unix/configure.ac
 	mkdir $(DISTDIR)/bitmaps
 	@(cd $(TOP_DIR); for i in bitmaps/* ; do \
 	    if [ -f $$i ] ; then \
@@ -1568,7 +1568,7 @@ dist:   $(UNIX_DIR)/configure $(UNIX_DIR)/tkConfig.h.in $(UNIX_DIR)/tk.pc.in $(M
 		$(TTK_DIR)/ttkGenStubs.tcl $(DISTDIR)/generic/ttk
 	mkdir $(DISTDIR)/win
 	cp $(TOP_DIR)/win/Makefile.in $(DISTDIR)/win
-	cp $(TOP_DIR)/win/configure.in \
+	cp $(TOP_DIR)/win/configure.ac \
 		$(TOP_DIR)/win/configure \
 		$(TOP_DIR)/win/tkConfig.sh.in \
 		$(TOP_DIR)/win/aclocal.m4 $(TOP_DIR)/win/tcl.m4 \
diff --git a/unix/configure.in b/unix/configure.ac
index a748246..a748246 100644
--- a/unix/configure.in
+++ b/unix/configure.ac
diff --git a/win/configure.in b/win/configure.ac
index cdef517..cdef517 100644
--- a/win/configure.in
+++ b/win/configure.ac