suppress gcc 8 aliasing warnings

function                                             old     new   delta
sigprocmask_SIG_SETMASK                                -      16     +16
wait_for_child_or_signal                             221     213      -8
dowait                                               432     424      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/libbb/lineedit.c b/libbb/lineedit.c
index b6fcd7af0..378f0900a 100644
--- a/libbb/lineedit.c
+++ b/libbb/lineedit.c
@@ -2309,6 +2309,16 @@ static int32_t reverse_i_search(int timeout)
 }
 #endif
 
+static void sigaction2(int sig, struct sigaction *act)
+{
+        // Grr... gcc 8.1.1:
+        // "passing argument 3 to restrict-qualified parameter aliases with argument 2"
+        // dance around that...
+        struct sigaction *oact FIX_ALIASING;
+        oact = act;
+        sigaction(sig, act, oact);
+}
+
 /* maxsize must be >= 2.
  * Returns:
  * -1 on read errors or EOF, or on bare Ctrl-D,
@@ -2419,7 +2429,7 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
         /* Install window resize handler (NB: after *all* init is complete) */
         S.SIGWINCH_handler.sa_handler = win_changed;
         S.SIGWINCH_handler.sa_flags = SA_RESTART;
-        sigaction(SIGWINCH, &S.SIGWINCH_handler, &S.SIGWINCH_handler);
+        sigaction2(SIGWINCH, &S.SIGWINCH_handler);
 #endif
         read_key_buffer[0] = 0;
         while (1) {