Add --enable-postinstall, an optional phase when building packages.

This makes it possible to run an arbitrary script between "make
install" and the polypkg run.  This will be used to copy different
word size versions of sudo_intercept.so and sudo_noexec.so.

INSTALL.md

@@ -709,6 +709,11 @@ Defaults are listed in brackets after the description.
         enables extra checks to make sure the environment does not
         become corrupted.
 
+    --enable-postinstall=PATH
+        Enable the use of a postinstall script that is run after
+        the "install" target but before packages as built as part
+        of the "package" target.
+
     --enable-warnings
         Enable compiler warnings when building sudo with gcc or clang.
 

Makefile.in

@@ -193,6 +193,9 @@ install: config.status ChangeLog pre-install install-nls
 	    exit $$?; \
 	done
 
+postinstall:
+	@POSTINSTALL@
+
 uninstall: uninstall-nls
 	for d in $(SUBDIRS); do \
 	    (cd $$d && exec $(MAKE) $@) && continue; \
@@ -394,6 +397,7 @@ force-dist: ChangeLog $(srcdir)/MANIFEST
 package: @PPFILES@
 	DESTDIR=$(abs_top_builddir)/destdir; rm -rf $$DESTDIR; \
 	$(MAKE) install INSTALL_OWNER= DESTDIR=$$DESTDIR && \
+	$(MAKE) postinstall INSTALL_OWNER= DESTDIR=$$DESTDIR && \
 	for p in @PPFILES@; do \
 	    $(SHELL) $(scriptdir)/pp $(PPFLAGS) --destdir=$$DESTDIR $$p \
 		srcdir=$(top_srcdir) \

configure

@@ -848,6 +848,7 @@ SUDOERS_UID
 SUDOERS_MODE
 SHLIB_MODE
 SHLIB_ENABLE
+POSTINSTALL
 MANCOMPRESSEXT
 MANCOMPRESS
 MANDIRTYPE
@@ -1016,6 +1017,7 @@ enable_noargs_shell
 enable_shell_sets_home
 enable_path_info
 enable_env_debug
+enable_postinstall
 enable_zlib
 enable_env_reset
 enable_warnings
@@ -1726,6 +1728,7 @@ Optional Features:
                           Set $HOME to target user in shell mode
   --disable-path-info     Print 'command not allowed' not 'command not found'
   --enable-env-debug      Whether to enable environment debugging.
+  --enable-postinstall    Script to run after the install phase
   --enable-zlib[=PATH]    Whether to enable or disable zlib
   --enable-env-reset      Whether to enable environment resetting by default.
   --enable-warnings       Whether to enable compiler warnings
@@ -6615,6 +6618,21 @@ printf "%s\n" "$as_me: WARNING: ignoring unknown argument to --enable-env-debug:
 fi
 
 
+# Check whether --enable-postinstall was given.
+if test ${enable_postinstall+y}
+then :
+  enableval=$enable_postinstall;  case "$enableval" in
+    yes)	as_fn_error $? "must give --enable-postinstall an argument." "$LINENO" 5
+		;;
+    no)		as_fn_error $? "--enable-postinstall not supported." "$LINENO" 5
+		;;
+    *)		POSTINSTALL="$enableval"
+		;;
+  esac
+
+fi
+
+
 # Check whether --enable-zlib was given.
 if test ${enable_zlib+y}
 then :

configure.ac

@@ -51,6 +51,7 @@ AC_SUBST([MANTYPE])dnl
 AC_SUBST([MANDIRTYPE])dnl
 AC_SUBST([MANCOMPRESS])dnl
 AC_SUBST([MANCOMPRESSEXT])dnl
+AC_SUBST([POSTINSTALL])dnl
 AC_SUBST([SHLIB_ENABLE])dnl
 AC_SUBST([SHLIB_MODE])dnl
 AC_SUBST([SUDOERS_MODE])dnl
@@ -1267,6 +1268,18 @@ AC_ARG_ENABLE(env_debug,
   esac
 ])
 
+AC_ARG_ENABLE(postinstall,
+[AS_HELP_STRING([--enable-postinstall], [Script to run after the install phase])],
+[ case "$enableval" in
+    yes)	AC_MSG_ERROR([must give --enable-postinstall an argument.])
+		;;
+    no)		AC_MSG_ERROR([--enable-postinstall not supported.])
+		;;
+    *)		POSTINSTALL="$enableval"
+		;;
+  esac
+])
+
 AC_ARG_ENABLE(zlib,
 [AS_HELP_STRING([--enable-zlib[[=PATH]]], [Whether to enable or disable zlib])],
 [], [enable_zlib=yes])