1 files changed, 41 insertions, 0 deletions
diff --git a/src/external/pam.m4 b/src/external/pam.m4
new file mode 100644
index 0000000..0dc7f19
--- /dev/null
+++ b/src/external/pam.m4
@@ -0,0 +1,41 @@
+AC_SUBST(PAM_LIBS)
+AC_SUBST(PAM_MISC_LIBS)
+
+AC_CHECK_HEADERS([security/pam_appl.h security/pam_modules.h],
+    [AC_CHECK_LIB([pam], [pam_get_item],
+        [PAM_LIBS="-lpam"],
+        [AC_MSG_ERROR([PAM must support pam_get_item])])],
+    [AC_MSG_ERROR([PAM development libraries not installed])]
+)
+
+AC_CHECK_HEADERS([security/pam_ext.h security/pam_modutil.h])
+AC_CHECK_HEADERS([security/pam_misc.h security/_pam_macros.h])
+AC_CHECK_HEADERS([security/openpam.h],,,[
+      #ifdef HAVE_SECURITY_PAM_APPL_H
+      #include <security/pam_appl.h>
+      #endif
+    ])
+
+AC_CHECK_LIB([pam_misc], [misc_conv],
+    [PAM_MISC_LIBS="-lpam_misc"])
+
+dnl save LIBS to restore later
+save_LIBS="$LIBS"
+LIBS="$PAM_LIBS"
+
+AC_CHECK_FUNCS(pam_modutil_getlogin pam_vsyslog)
+
+dnl restore LIBS
+LIBS="$save_LIBS"
+
+PKG_CHECK_MODULES([GDM_PAM_EXTENSIONS], [gdm-pam-extensions],
+                  [found_gdm_pam_extensions=yes],
+                  [AC_MSG_NOTICE([gdm-pam-extensions were not found. gdm support
+for multiple certificates will not be build.
+])])
+
+AC_SUBST(GDM_PAM_EXTENSIONS_CFLAGS)
+
+AS_IF([test x"$found_gdm_pam_extensions" = xyes],
+      [AC_DEFINE_UNQUOTED(HAVE_GDM_PAM_EXTENSIONS, 1,
+                          [Build with gdm-pam-extensions support])])