[PATCHv2 3/7] hurd: make function cast stronger

[Samuel Thibault]

Fixes

process_reply_S.c:104:23: error: function called through a non-compatible type 
[-Werror]
  104 |      OutP->RetCode = (*(kern_return_t (*)(mach_port_t, kern_return_t)) 
S_proc_setmsgport_reply) (In0P->Head.msgh_request_port, In0P-

gdb/ChangeLog:

2020-05-29  Samuel Thibault  <samuel.thiba...@ens-lyon.org>

        * reply_mig_hack.awk (Error return): Cast function through
        void *, to bypass compiler function call check.

diff --git a/gdb/reply_mig_hack.awk b/gdb/reply_mig_hack.awk
index 52ab90bba3..6ff683a841 100644
--- a/gdb/reply_mig_hack.awk
+++ b/gdb/reply_mig_hack.awk
@@ -130,7 +130,8 @@ parse_phase == 5 && /^#if[ \t]TypeCheck/ {
   # two arguments.
   # This is possibly bogus, but easier than supplying bogus values for all
   # the other args (we can't just pass 0 for them, as they might not be 
scalar).
-  print "\t    OutP->RetCode = (*(kern_return_t (*)(mach_port_t, 
kern_return_t)) " user_function_name ") (In0P->Head.msgh_request_port, In0P->" 
arg_name[0] ");";
+  print "\t    void * __error_call = " user_function_name ";";
+  print "\t    OutP->RetCode = (*(kern_return_t (*)(mach_port_t, 
kern_return_t)) __error_call) (In0P->Head.msgh_request_port, In0P->" 
arg_name[0] ");";
   print "\t    return;";
   print "\t  }";
   print "";