+AC_DEFUN(jm_PREREQ_ADDEXT,
+[
+ dnl For addext.c.
+ AC_SYS_LONG_FILE_NAMES
+ AC_CHECK_FUNCS(pathconf)
+ AC_CHECK_HEADERS(limits.h string.h unistd.h)
+])
+
+AC_DEFUN(jm_PREREQ_CANON_HOST,
+[
+ dnl Add any libraries as early as possible.
+ dnl In particular, inet_ntoa needs -lnsl at least on Solaris5.5.1,
+ dnl so we have to add -lnsl to LIBS before checking for that function.
+ AC_SEARCH_LIBS(gethostbyname, [inet nsl])
+
+ dnl These come from -lnsl on Solaris5.5.1.
+ AC_CHECK_FUNCS(gethostbyname gethostbyaddr inet_ntoa)
+
+ AC_CHECK_FUNCS(gethostbyname gethostbyaddr inet_ntoa)
+ AC_CHECK_HEADERS(unistd.h string.h netdb.h sys/socket.h \
+ netinet/in.h arpa/inet.h)
+])
+
+# If you use human.c, you need the following files:
+# uintmax_t.m4 inttypes_h.m4 ulonglong.m4
+AC_DEFUN(jm_PREREQ_HUMAN,
+[
+ AC_CHECK_HEADERS(limits.h stdlib.h string.h)
+ AC_CHECK_DECLS((getenv))
+ AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
+ AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
+])
+
+AC_DEFUN(jm_PREREQ_GETPAGESIZE,
+[
+ AC_CHECK_FUNCS(getpagesize)
+ AC_CHECK_HEADERS(OS.h unistd.h)
+])
+
+AC_DEFUN(jm_PREREQ_QUOTEARG,
+[
+ AC_CHECK_FUNCS(isascii mbrtowc)
+ AC_CHECK_HEADERS(limits.h stdlib.h string.h wchar.h wctype.h)
+ AC_HEADER_STDC
+ AC_C_BACKSLASH_A
+ AM_C_PROTOTYPES
+])
+
+AC_DEFUN(jm_PREREQ_READUTMP,
+[
+ AC_HEADER_STDC
+ AC_CHECK_HEADERS(string.h utmpx.h sys/param.h)
+ AC_CHECK_FUNCS(utmpname)
+ AC_CHECK_FUNCS(utmpxname)
+ AM_C_PROTOTYPES
+
+ utmp_includes="\
+$ac_includes_default
+#ifdef HAVE_UTMPX_H
+# include <utmpx.h>
+#else
+# include <utmp.h>
+#endif
+"
+ AC_CHECK_MEMBERS([struct utmpx.ut_user],,,[$utmp_includes])
+ AC_CHECK_MEMBERS([struct utmp.ut_user],,,[$utmp_includes])
+ AC_CHECK_MEMBERS([struct utmpx.ut_name],,,[$utmp_includes])
+ AC_CHECK_MEMBERS([struct utmp.ut_name],,,[$utmp_includes])
+])
+