Add needed test for per-target C compiler flags.

diff --git a/configure.ac b/configure.ac
index 211cc8adf17fee9f9b068218ac8cb84d59bd57b3..532691ae04c844afc1897f097caca09020e3aa3a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -51,6 +51,7 @@ AC_GNU_SOURCE
 
 dnl Checks for programs.
 AC_PROG_CC
+AM_PROG_CC_C_O
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_LIBTOOL