1 files changed, 36 insertions, 25 deletions

diff --git a/configure.in b/configure.in
index 82cb5d4bd..0dd8c0043 100644
--- a/configure.in
+++ b/configure.in
@@ -62,12 +62,10 @@ case "$host" in
 *-*-cygwin*)
         LIBS="$LIBS -lregex /usr/lib/textmode.o"
         AC_DEFINE(HAVE_CYGWIN)
-        AC_DEFINE(DISABLE_PAM)
         AC_DEFINE(DISABLE_SHADOW)
         AC_DEFINE(IPV4_DEFAULT)
         AC_DEFINE(IP_TOS_IS_BROKEN)
         AC_DEFINE(BROKEN_VHANGUP)
-        no_pam=1
         no_libsocket=1
         no_libnsl=1
         ;;
@@ -122,6 +120,7 @@ case "$host" in
         ;;
 *-*-linux*)
         no_dev_ptmx=1
+        check_for_libcrypt_later=1
         AC_DEFINE(DONT_TRY_OTHER_AF)
         AC_DEFINE(PAM_TTY_KLUDGE)
         inet6_default_4in6=yes
@@ -368,27 +367,30 @@ fi
 
 AC_FUNC_GETPGRP
 
+# Check for PAM libs
 PAM_MSG="no"
 AC_ARG_WITH(pam,
-        [  --without-pam           Disable PAM support ],
+        [  --with-pam              Enable PAM support ],
         [
-                if test "x$withval" = "xno" ; then
-                        no_pam=1
-                        AC_DEFINE(DISABLE_PAM)
-                        PAM_MSG="disabled"
-                fi
-        ]
-)
-if (test -z "$no_pam" && test "x$ac_cv_header_security_pam_appl_h" = "xyes") ; then
-        AC_CHECK_LIB(dl, dlopen, , )
-        LIBS="$LIBS -lpam"
+                if test "x$withval" != "xno" ; then
+                        if test "x$ac_cv_header_security_pam_appl_h" != "xyes" ; then
+                                AC_MSG_ERROR([PAM headers not found])
+                        fi
 
-        AC_CHECK_FUNCS(pam_getenvlist)
+                        AC_CHECK_LIB(dl, dlopen, , )
+                        AC_CHECK_LIB(pam, pam_set_item, , AC_MSG_ERROR([*** libpam missing]))
+                        AC_CHECK_FUNCS(pam_getenvlist)
 
-        disable_shadow=yes
+                        disable_shadow=yes
+                        PAM_MSG="yes"
 
-        PAM_MSG="yes"
+                        AC_DEFINE(USE_PAM)
+                fi
+        ]
+)
 
+# Check for older PAM
+if test "x$PAM_MSG" = "xyes" ; then
         # Check PAM strerror arguments (old PAM)
         AC_MSG_CHECKING([whether pam_strerror takes only one argument])
         AC_TRY_COMPILE(
@@ -403,7 +405,7 @@ if (test -z "$no_pam" && test "x$ac_cv_header_security_pam_appl_h" = "xyes") ; t
                         AC_MSG_RESULT(yes)
                         PAM_MSG="yes (old library)"
                 ]
-        ) 
+        )
 fi
 
 # The big search for OpenSSL
@@ -425,7 +427,7 @@ fi
 AC_CACHE_CHECK([for OpenSSL directory], ac_cv_openssldir, [
 
         for ssldir in $tryssldir "" /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/pkg /opt /opt/openssl ; do
-                if test ! -z "$ssldir" ; then
+                if test ! -z "$ssldir" -a "x$ssldir" != "x/usr"; then
                         LDFLAGS="$saved_LDFLAGS -L$ssldir/lib -L$ssldir"
                         CPPFLAGS="$saved_CPPFLAGS -I$ssldir/include"
                         if test ! -z "$need_dash_r" ; then
@@ -476,13 +478,16 @@ if (test ! -z "$ac_cv_openssldir" && test "x$ac_cv_openssldir" != "x(system)") ;
         AC_DEFINE(HAVE_OPENSSL)
         dnl Need to recover ssldir - test above runs in subshell
         ssldir=$ac_cv_openssldir
-        CPPFLAGS="$saved_CPPFLAGS -I$ssldir/include"
-        LDFLAGS="$saved_LDFLAGS -L$ssldir/lib -L$ssldir"
-        if test ! -z "$need_dash_r" ; then
-                LDFLAGS="$LDFLAGS -R$ssldir/lib -R$ssldir"
-        fi
-        if test ! -z "$blibpath" ; then
-                blibpath="$blibpath:$ssldir:$ssldir/lib"
+
+        if test ! -z "$ssldir" -a "x$ssldir" != "x/usr"; then
+                CPPFLAGS="$saved_CPPFLAGS -I$ssldir/include"
+                LDFLAGS="$saved_LDFLAGS -L$ssldir/lib -L$ssldir"
+                if test ! -z "$need_dash_r" ; then
+                        LDFLAGS="$LDFLAGS -R$ssldir/lib -R$ssldir"
+                fi
+                if test ! -z "$blibpath" ; then
+                        blibpath="$blibpath:$ssldir:$ssldir/lib"
+                fi
         fi
 fi
 LIBS="$saved_LIBS -lcrypto"
@@ -537,6 +542,12 @@ else
         fi
 fi
 
+# Some Linux systems (Slackware) need crypt() from libcrypt, *not* the 
+# version in OpenSSL. Skip this for PAM
+if test "x$PAM_MSG" = "xno" -a "x$check_for_libcrypt_later" = "x1"; then
+        AC_CHECK_LIB(crypt, crypt, , )
+fi
+
 # Cheap hack to ensure NEWS-OS libraries are arranged right.
 if test ! -z "$SONY" ; then
   LIBS="$LIBS -liberty";