configure.ac is missing, so need to edit this manually

https://bugs.gentoo.org/870661
--- a/configure
+++ b/configure
@@ -630,3 +630,3 @@
 
-main(){return(0);}
+int main(void){return(0);}
 EOF
--- a/pathload_rcv.h
+++ b/pathload_rcv.h
@@ -85,3 +85,3 @@
 EXTERN l_int32 get_sndr_time_interval(double snd_time[],double *sum);
-EXTERN void sig_alrm();
+EXTERN void sig_alrm(int __attribute__((__unused__)) unused);
 EXTERN void terminate_gracefully(struct timeval exp_start_time);
@@ -100,3 +100,3 @@
 EXTERN void help();
-EXTERN void sig_sigusr1() ;
+EXTERN void sig_sigusr1(int __attribute__((__unused__)) unused) ;
 
--- a/pathload_rcv_func.c
+++ b/pathload_rcv_func.c
@@ -669,3 +669,3 @@
 
-void sig_sigusr1()
+void sig_sigusr1(int __attribute__((__unused__)) unused)
 {
@@ -674,3 +674,3 @@
 
-void sig_alrm()
+void sig_alrm(int __attribute__((__unused__)) unused)
 {