pkg/60156: net/isic: configure from autoconf 2.13 uses implicit int

["rwhitlock22%gmail.com@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60156
>Category:       pkg
>Synopsis:       net/isic: configure from autoconf 2.13 uses implicit int
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 02 01:20:01 +0000 2026
>Originator:     Robert Whitlock
>Release:        pkgsrc-2026Q1
>Organization:
>Environment:
NetBSD 11.99.5 amd64
>Description:
configure fails due to implicit int in test program checking the compiler because it used autoconf 2.13
>How-To-Repeat:
cd net/isic
make install
>Fix:
Pullups to 2026Q1 please.

pkgsrc/net/isic/patches/patch-configure:

$NetBSD$

--- configure.orig      2026-04-02 01:07:11.989413131 +0000
+++ configure
@@ -652,7 +652,7 @@ cat > conftest.$ac_ext << EOF
 #line 653 "configure"
 #include "confdefs.h"
 
-main(){return(0);}
+int main(){return(0);}
 EOF
 if { (eval echo configure:658: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   ac_cv_prog_cc_works=yes