diff -Nur --no-dereference tai64nunix-0.70.old/chkshsgr.c tai64nunix-0.70/chkshsgr.c
--- tai64nunix-0.70.old/chkshsgr.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/chkshsgr.c	2024-03-18 15:42:35.465000000 -0400
@@ -1,8 +1,12 @@
 #include "exit.h"
+#include <sys/types.h>
+#include <stdlib.h>
+#include <grp.h>
+#include <unistd.h>
 
-main()
+main(int argc, char *argv[])
 {
-  short x[4];
+  gid_t x[4];
 
   x[0] = x[1] = 0;
   if (getgroups(1,x) == 0) if (setgroups(1,x) == -1) _exit(1);
diff -Nur --no-dereference tai64nunix-0.70.old/conf-cc tai64nunix-0.70/conf-cc
--- tai64nunix-0.70.old/conf-cc	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/conf-cc	2024-03-18 15:52:11.585000000 -0400
@@ -1,3 +1,3 @@
-gcc -O2
+${CC} ${CFLAGS}
 
 This will be used to compile .c files.
diff -Nur --no-dereference tai64nunix-0.70.old/conf-ld tai64nunix-0.70/conf-ld
--- tai64nunix-0.70.old/conf-ld	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/conf-ld	2024-03-18 15:44:11.772000000 -0400
@@ -1,3 +1,3 @@
-gcc -s
+${CC} ${LDFLAGS}
 
 This will be used to link .o files into an executable.
diff -Nur --no-dereference tai64nunix-0.70.old/Makefile tai64nunix-0.70/Makefile
--- tai64nunix-0.70.old/Makefile	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/Makefile	2024-03-18 15:46:44.954000000 -0400
@@ -165,7 +165,7 @@
 hasshsgr.h: \
 choose compile load tryshsgr.c hasshsgr.h1 hasshsgr.h2 chkshsgr \
 warn-shsgr
-	./chkshsgr || ( cat warn-shsgr; exit 1 )
+	echo "Warning: We can not run test on cross target. - ignoring ./chkshsgr || ( cat warn-shsgr; exit 1 )"
 	./choose clr tryshsgr hasshsgr.h1 hasshsgr.h2 > hasshsgr.h
 
 haswaitp.h: \
diff -Nur --no-dereference tai64nunix-0.70.old/tai64nunix.c tai64nunix-0.70/tai64nunix.c
--- tai64nunix-0.70.old/tai64nunix.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/tai64nunix.c	2024-03-18 15:22:21.369000000 -0400
@@ -25,7 +25,7 @@
 unsigned long nanosecs;
 unsigned long u;
 
-main()
+main(int argc, char *argv[])
 {
   char ch;
 
diff -Nur --no-dereference tai64nunix-0.70.old/trycpp.c tai64nunix-0.70/trycpp.c
--- tai64nunix-0.70.old/trycpp.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/trycpp.c	2024-03-18 15:24:12.044000000 -0400
@@ -1,4 +1,6 @@
-main()
+#include <stdio.h>
+#include <stdlib.h>
+int main(int argc, char *argv[])
 {
 #ifdef NeXT
   printf("nextstep\n"); exit(0);
diff -Nur --no-dereference tai64nunix-0.70.old/trypoll.c tai64nunix-0.70/trypoll.c
--- tai64nunix-0.70.old/trypoll.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/trypoll.c	2024-03-18 15:25:43.380000000 -0400
@@ -1,8 +1,9 @@
 #include <sys/types.h>
 #include <fcntl.h>
 #include <poll.h>
+#include <unistd.h>
 
-main()
+int main(int argc, char *argv[])
 {
   struct pollfd x;
 
diff -Nur --no-dereference tai64nunix-0.70.old/trysgact.c tai64nunix-0.70/trysgact.c
--- tai64nunix-0.70.old/trysgact.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/trysgact.c	2024-03-18 15:26:46.030000000 -0400
@@ -1,6 +1,7 @@
 #include <signal.h>
 
-main()
+void
+main(int argc, char *argv[])
 {
   struct sigaction sa;
   sa.sa_handler = 0;
diff -Nur --no-dereference tai64nunix-0.70.old/tryshsgr.c tai64nunix-0.70/tryshsgr.c
--- tai64nunix-0.70.old/tryshsgr.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/tryshsgr.c	2024-03-18 15:27:53.809000000 -0400
@@ -1,4 +1,5 @@
-main()
+#include <unistd.h>
+int main(int argc, char *argv[])
 {
   short x[4];
  
diff -Nur --no-dereference tai64nunix-0.70.old/tryulong64.c tai64nunix-0.70/tryulong64.c
--- tai64nunix-0.70.old/tryulong64.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/tryulong64.c	2024-03-18 15:28:33.039000000 -0400
@@ -1,4 +1,5 @@
-main()
+#include <unistd.h>
+int main(int argc, char *argv[])
 {
   unsigned long u;
   u = 1;
diff -Nur --no-dereference tai64nunix-0.70.old/trywaitp.c tai64nunix-0.70/trywaitp.c
--- tai64nunix-0.70.old/trywaitp.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/trywaitp.c	2024-03-18 15:29:09.672000000 -0400
@@ -1,7 +1,8 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 
-main()
+void
+main(int argc, char *argv[])
 {
   waitpid(0,0,0);
 }
diff -Nur --no-dereference tai64nunix-0.70.old/x86cpuid.c tai64nunix-0.70/x86cpuid.c
--- tai64nunix-0.70.old/x86cpuid.c	2000-04-03 00:15:33.000000000 -0400
+++ tai64nunix-0.70/x86cpuid.c	2024-03-18 15:29:43.147000000 -0400
@@ -5,7 +5,7 @@
   exit(1);
 }
 
-main()
+int main(int argc, char *argv[])
 {
   unsigned long x[4];
   unsigned long y[4];