build: check for slang.h header

The system depends on slang to be installed so make it clear on
configure.ac.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/configure.ac b/configure.ac
index f1e56c86ddacb19d4c4b31fb0a7ad7097015b453..a09bf6dae801c2c82224c60ec04e2a494f860724 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,7 @@ AC_PROG_INSTALL
 AC_PROG_LN_S
 
 AC_CHECK_HEADERS([sys/select.h alloca.h])
+AC_CHECK_HEADERS([slang.h])
 
 AC_MSG_CHECKING([for python versions])
 PYTHONVERS=$(echo /usr/include/python*/Python.h | sed "s|/usr/include/||g"| sed "s|/Python.h||g" 2> /dev/null)