From: Jim Meyering <jim@meyering.net>
Date: Mon, 8 Nov 1999 09:18:27 +0000 (+0000)
Subject: effectively require AC_CHECK_HEADERS(unistd.h)
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3080d2159c5563f8187e0a58458fded22356d8f;p=pspp

effectively require AC_CHECK_HEADERS(unistd.h)
---

diff --git a/m4/link-follow.m4 b/m4/link-follow.m4
index dd75d7bbc4..350c3959b1 100644
--- a/m4/link-follow.m4
+++ b/m4/link-follow.m4
@@ -7,6 +7,11 @@ AC_DEFUN(jm_AC_FUNC_LINK_FOLLOWS_SYMLINK,
   AC_CACHE_CHECK([whether link(2) follows symlinks],
 		 jm_ac_cv_func_link_follows_symlink,
   [
+    dnl poor-man's AC_REQUIRE: FIXME: repair this once autoconf-3 provides
+    dnl the appropriate framework.
+    test -z "$ac_cv_header_unistd_h" \
+      && AC_CHECK_HEADERS(unistd.h)
+
     # Create a regular file.
     echo > conftest.file
     AC_TRY_RUN(