(jm_PREREQ_POSIXVER): New macro.

(jm_PREREQ): Use it.

diff --git a/m4/prereq.m4 b/m4/prereq.m4
index 376b056..9a73829 100644 (file)
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -16,6 +16,7 @@ AC_DEFUN([jm_PREREQ],
   jm_PREREQ_MBSWIDTH
   jm_PREREQ_MEMCHR
   jm_PREREQ_PHYSMEM
+  jm_PREREQ_POSIXVER
   jm_PREREQ_QUOTEARG
   jm_PREREQ_READUTMP
   jm_PREREQ_REGEX
@@ -91,6 +92,12 @@ AC_DEFUN([jm_PREREQ_PHYSMEM],
   AC_CHECK_FUNCS(pstat_getstatic pstat_getdynamic)
 ])
 
+AC_DEFUN([jm_PREREQ_POSIXVER],
+[
+  AC_CHECK_HEADERS(unistd.h)
+  AC_CHECK_DECLS([getenv])
+])
+
 AC_DEFUN([jm_PREREQ_QUOTEARG],
 [
   AC_CHECK_FUNCS(isascii iswprint)