1 files changed, 4 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 42de9bde4..35f41d808 100644
--- a/configure.ac
+++ b/configure.ac
@@ -505,6 +505,10 @@ AC_HEADER_STDC
 # Check for headers that are ALWAYS required
 AC_CHECK_HEADERS([fcntl.h math.h errno.h ctype.h limits.h stdio.h stdlib.h string.h unistd.h stdarg.h signal.h locale.h sys/stat.h sys/types.h],,AC_MSG_ERROR([Compiling GNUnet requires standard UNIX headers files]))
 
+
+# Check for libltdl header (#2999)
+AC_CHECK_HEADERS([ltdl.h],,AC_MSG_ERROR([Compiling GNUnet requires libltdl headers (try installing libltdl-dev)]))
+
 # Checks for headers that are only required on some systems or opional (and where we do NOT abort if they are not there)
 AC_CHECK_HEADERS([malloc.h malloc/malloc.h langinfo.h sys/param.h sys/mount.h sys/statvfs.h sys/select.h sockLib.h sys/mman.h sys/msg.h sys/vfs.h arpa/inet.h fcntl.h libintl.h netdb.h netinet/in.h netinet/in_systm.h netinet/ip.h sys/ioctl.h sys/socket.h sys/time.h unistd.h kstat.h sys/sysinfo.h kvm.h sys/file.h sys/resource.h ifaddrs.h mach/mach.h stddef.h sys/timeb.h terminos.h argz.h ucred.h endian.h sys/endian.h execinfo.h])