Cast the pointer assigned to ss_sp to char *.

FreeBSD versions older than 11.0 use char * as the type of ss_sp in
stack_t instead of the standards-defined void *.  C++ allows a char *
pointer to be converted to a void *, so it is safe to cast the return
value of xmalloc to char * if ss_sp is either a char * or void *.
Just always use the cast to char * since that is less ugly than having
to add a special case.

gdb/ChangeLog:

	* main.c (setup_alternate_signal_stack): Cast to char *.

1 files changed, 3 insertions, 1 deletions

diff --git a/gdb/main.c b/gdb/main.c
index c149b708bf..2ce17136df 100644
--- a/gdb/main.c
+++ b/gdb/main.c
@@ -297,7 +297,9 @@ setup_alternate_signal_stack (void)
 #ifdef HAVE_SIGALTSTACK
   stack_t ss;
 
-  ss.ss_sp = xmalloc (SIGSTKSZ);
+  /* FreeBSD versions older than 11.0 use char * for ss_sp instead of
+     void *.  This cast works with both types.  */
+  ss.ss_sp = (char *) xmalloc (SIGSTKSZ);
   ss.ss_size = SIGSTKSZ;
   ss.ss_flags = 0;