re-add bincompat tester that was removed w/ perl-test directory

exp/sizeof.c

@@ -0,0 +1,76 @@
+/*
+#!perl -l
+use Config;
+my $prg = "$0.out";
+my $cmd = "$Config{cc} -Wall -D$^O -o $prg $0; ./$prg; rm $prg";
+print $cmd; system $cmd;
+__END__
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+    const char *name;
+    unsigned int size;
+} sizeof_info_t;
+
+#define SIZEOF_INFO(v) \
+    {#v, sizeof(v)}
+
+#ifdef solaris
+
+#include <sys/kstat.h>
+#include <sys/sysinfo.h>
+#include <procfs.h>
+
+static sizeof_info_t sizeof_info[] = {
+    /* kstat */
+    SIZEOF_INFO(kstat_named_t),
+    SIZEOF_INFO(vminfo_t),
+    SIZEOF_INFO(cpu_stat_t),
+    /* procfs */
+    SIZEOF_INFO(psinfo_t),
+    SIZEOF_INFO(prusage_t),
+    SIZEOF_INFO(prcred_t),
+    SIZEOF_INFO(pstatus_t),
+    {NULL, 0}
+};
+
+#endif
+
+#ifdef hpux
+
+#include <sys/pstat.h>
+#include <mntent.h>
+#include <sys/vfs.h>
+#include <sys/mib.h>
+
+static sizeof_info_t sizeof_info[] = {
+    SIZEOF_INFO(struct pst_static),
+    SIZEOF_INFO(struct pst_status),
+    SIZEOF_INFO(struct pst_dynamic),
+    SIZEOF_INFO(struct pst_swapinfo),
+    SIZEOF_INFO(struct mntent),
+    SIZEOF_INFO(struct statfs),
+    SIZEOF_INFO(struct nmparms),
+    SIZEOF_INFO(mib_ifEntry),
+    SIZEOF_INFO(mib_ipRouteEnt),
+    {NULL, 0}
+};
+
+#endif
+
+static void print_sizeof_info(sizeof_info_t *info)
+{
+    while (info->name) {
+        printf("sizeof(%s) == %d\n", info->name, info->size);
+        ++info;
+    }
+}
+
+int main(void) {
+    system("uname -a");
+    print_sizeof_info(sizeof_info);
+    return 0;
+}