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git-svn-id: https://svn.dealii.org/trunk@3311 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/aclocal.m4 b/deal.II/aclocal.m4
index ef23d4e13529fb0bace8691c6055f14b5b7ebb46..f6003906c5dda22c80bca2a27a82ee383a953205 100644 (file)
--- a/deal.II/aclocal.m4
+++ b/deal.II/aclocal.m4
@@ -209,11 +209,14 @@ AC_DEFUN(DEAL_II_CHECK_ISNAN_FLAG, dnl
                isnan (d);
            ],
            [
+               dnl We found a flag by which isnan is defined; store
+               dnl this flag and exit the loop
                deal_II_isnan_flag="-DHAVE_ISNAN $testflag"
                break;
            ],
            [
-       ])
+                dnl The flag didn't work, don't do nothing.
+           ])
        done
 
        dnl if no such flag was found, then abort ./configure since