2 files changed, 13 insertions, 0 deletions
diff --git a/cppawk b/cppawk
index cdfe9f1..515a430 100755
--- a/cppawk
+++ b/cppawk
@@ -98,6 +98,10 @@ while [ $# -gt 0 ] ; do
     awk_opts="$awk_opts $1"
     prepro_opts="$prepro_opts -D__bignum__=1"
     ;;
+  -P | --posix )
+    awk_opts="$awk_opts $1"
+    prepro_opts="$prepro_opts -D__posix__=1"
+    ;;
   -* )
     awk_opts="$awk_opts $(shell_escape "$1")"
     ;;
diff --git a/testcases b/testcases
index ed710e1..04e2971 100644
--- a/testcases
+++ b/testcases
@@ -102,3 +102,12 @@ gawk
 18:
 ./cppawk 'BEGIN { print __bignum__ }'
 :
+--
+19:
+./cppawk -P 'BEGIN { print __posix__ }'
+:
+1
+--
+20:
+./cppawk 'BEGIN { print __posix__ }'
+: