hints/aix_4.sh to allow build on aix 4.2

Message-Id: <1202501426.15175.10.camel@sinf009w.d81970300.cgss-guyane.fr>

p4raw-id: //depot/perl@33262

diff --git a/hints/aix_4.sh b/hints/aix_4.sh
index 46e8d25..80f309f 100755 (executable)
--- a/hints/aix_4.sh
+++ b/hints/aix_4.sh
@@ -113,6 +113,15 @@ case "$cc" in
     *gcc*) ;;
     *) ccflags="$ccflags -qmaxmem=-1 -qnoansialias" ;;
     esac
+
+# since change #28654, _XOPEN_SOURCE symbol needs to be defined on aix 4.2
+# to avoid the following build error in perlio.c :
+# 1506-294 (S) Syntax error in expression on #if directive.
+#
+case "$osvers" in
+    4.2.1.0) ccflags="$ccflags -D_XOPEN_SOURCE" ;;
+    *) ;;
+    esac
 nm_opt='-B'
 
 # These functions don't work like Perl expects them to.