configure: use AC_PROG_CXX macro

diff --git a/configure.ac b/configure.ac
index 71ef10dbf72b1d05c1db3fda4be3c86bce92bce9..650f5aa339afcf7822b130df07a87c0612da0fcf 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,7 @@ LT_INIT
 
 # Checks for programs.
 AC_PROG_CC
+AC_PROG_CXX
 AM_PROG_CC_C_O
 AC_PROG_LIBTOOL