Only check security/pam_appl.h which is provided by package libpam when pam is
enabled.

Upstream-Status: Pending

Signed-off-by: Kai Kang <kai.kang@windriver.com>
---
diff --git a/configure.ac b/configure.ac
index b35e672..e78a751 100644
--- a/configure.ac
+++ b/configure.ac
@@ -195,6 +195,19 @@ fi
 
 # See if we have libpam.a.  Investigate PAM versus Linux-PAM.
 if test "$with_pam" = yes ; then
+  AC_CHECK_HEADERS([security/pam_appl.h], [], [], [
+#include <sys/types.h>
+#ifdef HAVE_NETINET_IN_SYSTM_H
+# include <netinet/in_systm.h>
+#endif
+#include <netinet/in.h>
+#ifdef HAVE_NETINET_IP_H
+# include <netinet/ip.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+])
   AC_CHECK_LIB(dl, dlopen, LIBDL=-ldl)
   AC_CHECK_LIB(pam, pam_authenticate, LIBPAM=-lpam)
   if test "$ac_cv_lib_pam_pam_authenticate" = yes ; then
@@ -587,7 +600,7 @@ AC_HEADER_DIRENT
 AC_CHECK_HEADERS([arpa/nameser.h errno.h fcntl.h features.h \
 		  glob.h memory.h netinet/ether.h netinet/in_systm.h \
 		  netinet/ip.h netinet/ip_icmp.h netinet/ip_var.h \
-		  security/pam_appl.h shadow.h \
+		  shadow.h \
 		  stdarg.h stdlib.h string.h stropts.h sys/tty.h \
 		  sys/utsname.h sys/ptyvar.h sys/msgbuf.h sys/filio.h \
 		  sys/ioctl_compat.h sys/cdefs.h sys/stream.h sys/mkdev.h \