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diff --git a/configure.ac b/configure.ac
index 6020fbf..73fbe21 100644
--- a/configure.ac
+++ b/configure.ac
@@ -982,7 +982,6 @@ AC_MSG_CHECKING([for --disable-tools])
 AC_ARG_ENABLE(
 	[tools],
 	AS_HELP_STRING([--disable-tools],[disable tool compilation]),,
-	[enable_tools=yes]
 )
 apbs_do_tools=""
 if test x"$enable_tools" != "xno"; then
@@ -1048,7 +1047,6 @@ AC_MSG_CHECKING([--disable-zlib])
 AC_ARG_ENABLE(
 	[zlib],
 	AS_HELP_STRING([--disable-zlib], [disable zlib compilation]),,
-	[disable_zlib=no]
 )
 if test x"$disable_zlib" == "xno"; then
 	AC_MSG_RESULT([yes])
@@ -1160,11 +1158,8 @@ AC_MSG_CHECKING([for --disable-openmp])
 AC_ARG_ENABLE(
 	[openmp],
 	AS_HELP_STRING([--disable-openmp],[disables OpenMP compiler support]),,
-	[disable_openmp=yes]
 )
-if test x"$disable_openmp" != "xyes"; then
-    AC_MSG_RESULT([yes])
-else
+if test x"$disable_openmp" != "xno"; then
     AC_MSG_RESULT([no])
 	if [[ "${CC}" = "icc" ] && [ "${F77}" = "ifort" ]]; then
 		CFLAGS="${CFLAGS} -openmp"
@@ -1172,20 +1167,25 @@ else
 		LDFLAGS="${LDFLAGS} -static-intel"
 	fi
 	
-	if [[ "${CC}" = "gcc" ] && [ "${F77}" = "gfortran" ]]; then
-		gcc_version=`gcc --version`
+	if [[[ "${CC}" = *gcc* ]]] && [[[ "${F77}" = *gfortran* ]]]; then
+		gcc_version=`${CC} --version`
 		gcc_complete_version=`echo ${gcc_version} | awk '{printf("%s",$3)}' | awk -F'.' '{print $1$2}'`
 		
 		if test ["${gcc_complete_version}" -ge 42]; then
 			CFLAGS="${CFLAGS} -fopenmp"
 			FFLAGS="${FFLAGS} -fopenmp"
+			OPENMP_LIBS="-lgomp"
 		else
 		    AC_MSG_RESULT([WARNING])
 			AC_MSG_RESULT([WARNING Version of gcc/gfortran does not support OpenMP. Disabling.])
 			AC_MSG_RESULT([WARNING])
 		fi
 	fi
+else
+    AC_MSG_RESULT([yes])
+    disable_openmp=yes
 fi
+AC_SUBST(OPENMP_LIBS)
 
 dnl # -----------------------
 dnl # CHECK FOR WINDOWS SPECIFIC LIBRARIES