Add `unifdef' directory to the Automake-based build.

`unifdef' is now compiled and installed in C-Reduce's libexec directory,
alongside C-Reduce's other internal tools.

This commit does *not* include changes to the CMake-based build process.
Contributions from CMake users would be welcome.

Makefile.am

@@ -15,7 +15,8 @@ SUBDIRS = \
 	clex \
 	creduce \
 	scripts \
-	tests
+	tests \
+	unifdef
 
 EXTRA_DIST = \
 	CMakeLists.txt \

Makefile.in

@@ -362,7 +362,8 @@ SUBDIRS = \
 	clex \
 	creduce \
 	scripts \
-	tests
+	tests \
+	unifdef
 
 EXTRA_DIST = \
 	CMakeLists.txt \

configure

@@ -16615,7 +16615,7 @@ fi
 
 ###############################################################################
 
-ac_config_files="$ac_config_files Makefile clang_delta/Makefile clex/Makefile creduce/Makefile scripts/Makefile tests/Makefile"
+ac_config_files="$ac_config_files Makefile clang_delta/Makefile clex/Makefile creduce/Makefile scripts/Makefile tests/Makefile unifdef/Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -17741,6 +17741,7 @@ do
     "creduce/Makefile") CONFIG_FILES="$CONFIG_FILES creduce/Makefile" ;;
     "scripts/Makefile") CONFIG_FILES="$CONFIG_FILES scripts/Makefile" ;;
     "tests/Makefile") CONFIG_FILES="$CONFIG_FILES tests/Makefile" ;;
+    "unifdef/Makefile") CONFIG_FILES="$CONFIG_FILES unifdef/Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
   esac

configure.ac

@@ -135,6 +135,7 @@ AC_OUTPUT(
   creduce/Makefile
   scripts/Makefile
   tests/Makefile
+  unifdef/Makefile
 )
 
 ###############################################################################

unifdef/Makefile.am

@@ -0,0 +1,26 @@
+## -*- mode: Makefile-Automake -*-
+##
+## Copyright (c) 2015 The University of Utah
+## All rights reserved.
+##
+## This file is distributed under the University of Illinois Open Source
+## License.  See the file COPYING for details.
+
+###############################################################################
+
+libexec_PROGRAMS = unifdef
+
+GIT_HASH := $(shell "$(top_srcdir)/git-hash.sh" "$(top_srcdir)" || echo error)
+GIT_FLAG = -DGIT_VERSION=\"$(GIT_HASH)\"
+
+unifdef_CPPFLAGS = \
+	$(GIT_FLAG)
+
+unifdef_SOURCES = \
+	unifdef.c \
+	unifdef.h \
+	version.h
+
+###############################################################################
+
+## End of file.