Make perl compile under minix again

Minix has a #define for si_signo to _info._signo, despite not having
a struct siginfo; this caused compilation errors.

(cherry picked from commit 3555a05cbfc80f94a4fe8ae3789f03db69701ca4)

1 files changed, 3 insertions, 0 deletions

diff --git a/perl.h b/perl.h
index 08d5e786f3..b0d35e27c7 100644
--- a/perl.h
+++ b/perl.h
@@ -2968,6 +2968,9 @@ typedef struct padname PADNAME;
 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
     typedef siginfo_t Siginfo_t;
 #else
+#ifdef si_signo /* minix */
+#undef si_signo
+#endif
     typedef struct {
         int si_signo;
     } Siginfo_t;