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diff --git a/gc-7.2/m4/gc_set_version.m4 b/gc-7.2/m4/gc_set_version.m4
new file mode 100644
index 0000000..0c18172
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+++ b/gc-7.2/m4/gc_set_version.m4
@@ -0,0 +1,52 @@
+# 
+# 
+# THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+# OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+# 
+# Permission is hereby granted to use or copy this program
+# for any purpose,  provided the above notices are retained on all copies.
+# Permission to modify the code and to distribute modified code is granted,
+# provided the above notices are retained, and a notice that the code was
+# modified is included with the above copyright notice.
+#
+# Modified by: Grzegorz Jakacki <jakacki at acm dot org>
+
+# GC_SET_VERSION
+# sets and AC_DEFINEs GC_VERSION_MAJOR, GC_VERSION_MINOR and GC_ALPHA_VERSION
+# based on the contents of PACKAGE_VERSION; PACKAGE_VERSION must conform to
+# [0-9]+[.][0-9]+(alpha[0.9]+)? 
+# in lex syntax; if there is no alpha number, GC_ALPHA_VERSION is empty
+#
+AC_DEFUN([GC_SET_VERSION], [
+  AC_MSG_CHECKING(GC version numbers)
+  GC_VERSION_MAJOR=`echo $PACKAGE_VERSION | sed 's/^\([[0-9]][[0-9]]*\)[[.]].*$/\1/g'`
+  GC_VERSION_MINOR=`echo $PACKAGE_VERSION | sed 's/^[[^.]]*[[.]]\([[0-9]][[0-9]]*\).*$/\1/g'`
+  GC_ALPHA_VERSION=`echo $PACKAGE_VERSION | sed 's/^[[^.]]*[[.]][[0-9]]*//'`
+
+  case "$GC_ALPHA_VERSION" in
+    alpha*) 
+      GC_ALPHA_VERSION=`echo $GC_ALPHA_VERSION \
+      | sed 's/alpha\([[0-9]][[0-9]]*\)/\1/'` ;;
+    *)  GC_ALPHA_MAJOR='' ;;
+  esac
+
+  if test :$GC_VERSION_MAJOR: = :: \
+     -o   :$GC_VERSION_MINOR: = :: ;
+  then
+    AC_MSG_RESULT(invalid)
+    AC_MSG_ERROR([nonconforming PACKAGE_VERSION='$PACKAGE_VERSION'])
+  fi
+  
+  AC_DEFINE_UNQUOTED([GC_VERSION_MAJOR], $GC_VERSION_MAJOR,
+		     [The major version number of this GC release.])
+  AC_DEFINE_UNQUOTED([GC_VERSION_MINOR], $GC_VERSION_MINOR,
+		     [The minor version number of this GC release.])
+  if test :$GC_ALPHA_VERSION: != :: ; then
+    AC_DEFINE_UNQUOTED([GC_ALPHA_VERSION], $GC_ALPHA_VERSION,
+		       [The alpha version number, if applicable.])
+  fi
+  AC_MSG_RESULT(major=$GC_VERSION_MAJOR minor=$GC_VERSION_MINOR \
+${GC_ALPHA_VERSION:+alpha=}$GC_ALPHA_VERSION)
+])
+
+sinclude(libtool.m4)