Introduce a macro to compare p4est version numbers.

git-svn-id: https://svn.dealii.org/trunk@30560 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/include/deal.II/base/config.h.in b/deal.II/include/deal.II/base/config.h.in
index fff3e01930294070c354a08abf63cbdc6f28c892..ad1681b62e5c5e08fe3ba3ec6f9c8a573ace4081 100644 (file)
--- a/deal.II/include/deal.II/base/config.h.in
+++ b/deal.II/include/deal.II/base/config.h.in
@@ -353,6 +353,25 @@
 #  define DEAL_II_P4EST_VERSION_SUBMINOR @P4EST_VERSION_SUBMINOR@
 #  define DEAL_II_P4EST_VERSION_PATCH @P4EST_VERSION_PATCH@
 
+#  define DEAL_II_P4EST_VERSION_GTE(major,minor,subminor,patch) \
+ ((DEAL_II_P4EST_VERSION_MAJOR * 1000000 + \
+    DEAL_II_P4EST_VERSION_MINOR * 10000 + \
+     DEAL_II_P4EST_VERSION_SUBMINOR * 100 + \
+      DEAL_II_P4EST_VERSION_PATCH) \
+    >=  \
+    (major)*1000000 + (minor)*10000 + (subminor)*100 + (patch))
+#else
+  // p4est up to 0.3.4.1 didn't define P4EST_VERSION_*. since
+  // we didn't supports anything before 0.3.4, we assume 0.3.4
+  // This means that we can't use the new features in 0.3.4.1
+#  define DEAL_II_P4EST_VERSION_GTE(major,minor,subminor,patch) \
+  ((0 * 1000000 + \
+    3 * 10000 + \
+    4 * 100 + \
+    0) \
+    >=  \
+    (major)*1000000 + (minor)*10000 + (subminor)*100 + (patch))
+
 #endif