2 files changed, 13 insertions, 0 deletions
diff --git a/cppawk b/cppawk
index d24300b..cdfe9f1 100755
--- a/cppawk
+++ b/cppawk
@@ -94,6 +94,10 @@ while [ $# -gt 0 ] ; do
   -- )
     break
     ;;
+  -M | --bignum )
+    awk_opts="$awk_opts $1"
+    prepro_opts="$prepro_opts -D__bignum__=1"
+    ;;
   -* )
     awk_opts="$awk_opts $(shell_escape "$1")"
     ;;
diff --git a/testcases b/testcases
index d1a9fff..ed710e1 100644
--- a/testcases
+++ b/testcases
@@ -93,3 +93,12 @@ BEGIN {
 }'
 :
 gawk
+--
+17:
+./cppawk -M 'BEGIN { print __bignum__ }'
+:
+1
+--
+18:
+./cppawk 'BEGIN { print __bignum__ }'
+: