Index: /issm/trunk-jpl/m4/issm_options.m4
===================================================================
--- /issm/trunk-jpl/m4/issm_options.m4	(revision 11695)
+++ /issm/trunk-jpl/m4/issm_options.m4	(revision 11696)
@@ -19,4 +19,5 @@
 	AC_MSG_CHECKING(for serial compilation)
 	AM_CONDITIONAL([NOSERIAL], [test $SERIAL_VALUE = no])
+	AM_CONDITIONAL([SERIAL], [test $SERIAL_VALUE = yes])
 	AC_MSG_RESULT($SERIAL_VALUE) 
 	dnl }}}
@@ -28,4 +29,5 @@
 	AC_MSG_CHECKING(for parallel compilation)
 	AM_CONDITIONAL([NOPARALLEL], [test $PARALLEL_VALUE = no])
+	AM_CONDITIONAL([PARALLEL], [test $PARALLEL_VALUE = yes])
 	AC_MSG_RESULT($PARALLEL_VALUE) 
 	ISSMEXT=".exe"
@@ -505,12 +507,13 @@
 							 [petsc root directory, necessary for parallel build]),
 			  [PETSC_ROOT=$withval],[PETSC_ROOT=""])
-
-	if test "$PARALLEL_VALUE" = "yes" ; then
-		if test "$PETSC_ROOT" = "" ; then
-			AC_MSG_ERROR([missing --with-petsc-dir argument for parallel compilation!])
-		fi
-	fi
-
-	dnl if test "$PARALLEL_VALUE" = "yes" ; then 
+		
+	dnl Used to be necessary, not anymore. 
+	dnl if test "$PARALLEL_VALUE" = "yes" ; then
+		dnl if test "$PETSC_ROOT" = "" ; then
+			dnl AC_MSG_ERROR([missing --with-petsc-dir argument for parallel compilation!])
+		dnl fi
+	dnl fi
+
+	if test -d "$PETSC_ROOT"; then
 		AC_MSG_CHECKING(for petsc version)
 		PETSC_MAJOR=`cat $PETSC_ROOT/include/petscversion.h | grep "#define PETSC_VERSION_MAJOR" | sed 's/#define PETSC_VERSION_MAJOR//' | sed 's/ //g'`
@@ -519,7 +522,6 @@
 		AC_DEFINE_UNQUOTED([_PETSC_MINOR_],$PETSC_MINOR,[ Petsc version minor])
 		AC_MSG_RESULT($PETSC_MAJOR.$PETSC_MINOR)
-	dnl fi
-	
-		
+	fi
+	
 	AC_ARG_WITH([petsc-arch],
 			  AS_HELP_STRING([--with-petsc-arch = DIR],
@@ -527,9 +529,10 @@
 			  [PETSC_ARCH=$withval],[PETSC_ARCH=""])
 
-	if test "$PARALLEL_VALUE" = "yes" ; then
-		if test "$PETSC_ARCH" = "" ; then
-			AC_MSG_ERROR([missing --with-petsc-arch argument for parallel compilation!])
-		fi
-	fi
+	dnl Used to be necessary, not anymore. 
+	dnl if test "$PARALLEL_VALUE" = "yes" ; then
+		dnl if test "$PETSC_ARCH" = "" ; then
+			dnl AC_MSG_ERROR([missing --with-petsc-arch argument for parallel compilation!])
+		dnl fi
+	dnl fi
 	
 	AC_MSG_CHECKING(for Petsc headers and libraries in $PETSC_ROOT for architecture $PETSC_ARCH)
@@ -573,9 +576,13 @@
 	fi
 
-	if test $HAVE_PETSC = no; then
-		AC_MSG_ERROR([could not find petsc. user should specify --with-petsc-dir and --with-petsc-arch options. Petsc is needed to run ISSM!])
-	else
-		AC_MSG_RESULT($HAVE_PETSC)
-	fi
+	dnl used to e necessary, not anymore. 
+	dnl if test $HAVE_PETSC = no; then
+		dnl AC_MSG_ERROR([could not find petsc. user should specify --with-petsc-dir and --with-petsc-arch options. Petsc is needed to run ISSM!])
+	dnl else
+	dnl AC_MSG_RESULT($HAVE_PETSC)
+	dnl fi
+	
+	AM_CONDITIONAL([PETSC], [test x$HAVE_PETSC = xyes])
+	AC_MSG_RESULT($HAVE_PETSC)
 	dnl }}}
 	dnl tao{{{1