Minor fixes.

* am/enable.m4 (MU_ENABLE_SUPPORT): Add the additional-cond argument.
(MU_ENABLE_BUILD): Likewise.
* configure.ac: Update 4th args in calls to MU_ENABLE_SUPPORT.
Do not use MU_ENABLE_BUILD within conditionals, use additional-cond
instead.
* libmailutils/stream/mapfile_stream.c: Include sys/stat.h

@@ -16,29 +16,33 @@ dnl You should have received a copy of the GNU General Public License
 dnl along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
 
 dnl MU_ENABLE_SUPPORT(feature, [action-if-true], [action-if-false],
-dnl                   [default-value])
+dnl                   [additional-cond], [default-value])
 
 AC_DEFUN([MU_ENABLE_SUPPORT], [
 	pushdef([mu_upcase],translit($1,[a-z+-],[A-ZX_]))
 	pushdef([mu_cache_var],[mu_cv_enable_]translit($1,[+-],[x_]))
 	pushdef([mu_cond],[MU_COND_SUPPORT_]mu_upcase)
 
-	AC_ARG_ENABLE($1, 
-	              AC_HELP_STRING([--disable-]$1,
-		                     [disable ]$1[ support]),
-	              [
-	case "${enableval}" in
+       	ifelse([$4],,,[if test $4; then])
+	  AC_ARG_ENABLE($1, 
+	                AC_HELP_STRING([--disable-]$1,
+		                       [disable ]$1[ support]),
+	                [
+	  case "${enableval}" in
 		yes) mu_cache_var=yes;;
                 no)  mu_cache_var=no;;
 	        *)   AC_MSG_ERROR([bad value ${enableval} for --disable-$1]) ;;
-        esac],
-                      [mu_cache_var=ifelse([$4],,yes,[$4])])
+          esac],
+                      [mu_cache_var=ifelse([$5],,yes,[$5])])
 
-	if test "[$]mu_cache_var" = "yes"; then
-		ifelse([$2],,:,[$2])
-	ifelse([$3],,,else
-               [$3])
-	fi
+	  if test "[$]mu_cache_var" = "yes"; then
+		  ifelse([$2],,:,[$2])
+ 	  ifelse([$3],,,else
+                 [$3])
+	  fi
+	ifelse([$4],,,[else
+		mu_cache_var=no
+        fi])
 	if test "[$]mu_cache_var" = "yes"; then
 		AC_DEFINE([ENABLE_]mu_upcase,1,[Define this if you enable $1 support])
         fi
@@ -55,25 +59,30 @@ AC_DEFUN([MU_ENABLE_BUILD], [
 	pushdef([mu_cache_var],[mu_cv_enable_build_]translit($1,[+-],[x_]))
 	pushdef([mu_cond],[MU_COND_]mu_upcase)
 
-	AC_ARG_ENABLE(build-$1, 
-	              AC_HELP_STRING([--disable-build-]$1,
-		                     [do not build ]$1),
-	              [
-	case "${enableval}" in
+       	ifelse([$4],,,[if test $4; then])
+	  AC_ARG_ENABLE(build-$1, 
+	                AC_HELP_STRING([--disable-build-]$1,
+		                       [do not build ]$1),
+	                [
+  	  case "${enableval}" in
 		yes) mu_cache_var=yes;;
                 no)  mu_cache_var=no;;
 	        *)   AC_MSG_ERROR([bad value ${enableval} for --disable-$1]) ;;
-        esac],
+          esac],
                       [mu_cache_var=ifelse([$5],,yes,[$5])])
 
-	if test "[$]mu_cache_var" = "yes"; then
-		ifelse([$2],,:,[$2])
-	ifelse([$3],,,else
-               [$3])
-	fi
-	if test "[$]mu_cache_var" = "yes"; then
+	  if test "[$]mu_cache_var" = "yes"; then
+		  ifelse([$2],,:,[$2])
+	  ifelse([$3],,,else
+                 [$3])
+	  fi
+	  if test "[$]mu_cache_var" = "yes"; then
 		AC_DEFINE([MU_BUILD_]mu_upcase,1,[Define this if you build $1])
-        fi
+          fi
+	ifelse([$4],,,[else
+		mu_cache_var=no
+        fi])
+	  
 	AM_CONDITIONAL(mu_cond,
 	               [test "[$]mu_cache_var" = "yes"])
 	

@@ -810,7 +810,7 @@ MU_ENABLE_SUPPORT([pop],
          [MU_LIB_POP='${top_builddir}/libproto/pop/libmu_pop.la'])
 MU_ENABLE_SUPPORT([nntp],
          [MU_LIB_NNTP='${top_builddir}/libproto/nntp/libmu_nntp.la'],[],
-	 [$mu_build_experimental])
+	 ["$mu_build_experimental" = "yes"])
 MU_ENABLE_SUPPORT([mh],
          [MU_LIB_MH='${top_builddir}/libproto/mh/libmu_mh.la'])
 MU_ENABLE_SUPPORT([maildir],
@@ -1141,7 +1141,7 @@ MU_ENABLE_SUPPORT(cxx,
   	          [MU_CXX_EXAMPLES_BUILD='$(MU_CXX_EXAMPLES_LIST)'
                    MU_LIB_CPP='${top_builddir}/libmu_cpp/libmu_cpp.la'],
 		  [],
-		  [$mu_build_experimental])
+		  ["$mu_build_experimental" = "yes"])
 
 # Default mailbox record
 # Note: 1. Support for mbox type is always enabled.
@@ -1185,18 +1185,14 @@ MU_ENABLE_BUILD(comsat)
 MU_ENABLE_BUILD(maidag)
 MU_ENABLE_BUILD(mail)
 MU_ENABLE_BUILD(sieve)
-if test "$useguile" = "yes"; then
-  MU_ENABLE_BUILD(guimb,,,[$useguile])
-fi
+MU_ENABLE_BUILD(guimb,,,["$useguile" = "yes"])
 MU_ENABLE_BUILD(messages)
 MU_ENABLE_BUILD(readmsg)
 MU_ENABLE_BUILD(dotlock)
 MU_ENABLE_BUILD(movemail)
 MU_ENABLE_BUILD(mimeview)
 
-if test "$mu_cv_enable_mh" = yes; then
-  MU_ENABLE_BUILD(mh)
-fi
+MU_ENABLE_BUILD(mh,,,["$mu_cv_enable_mh" = yes])
 
 AC_SUBST(MH_BIN_DIR)
 

@@ -22,6 +22,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <sys/stat.h>
 
 #include <mailutils/types.h>
 #include <mailutils/alloc.h>