Define an _() macro for XS backcompat

arc · arc · commit ae75e3d0dc87 · 2017-10-22T12:46:28.000+01:00
Removing this macro (as part of c89ification) broke DBI; see RT#132347.
diff --git a/perl.h b/perl.h
@@ -564,6 +564,7 @@
 #ifndef PERL_CORE
 #define VOL volatile
 #define CAN_PROTOTYPE
+#define _(args) args
 #endif
 
 /* By compiling a perl with -DNO_TAINT_SUPPORT or -DSILENT_NO_TAINT_SUPPORT,
