Fix language errors when checking C functions.

diff --git a/configure.ac b/configure.ac
index b362785..0e46a6b 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -32,6 +32,12 @@ AC_PROG_LIBTOOL
 
 AC_LANG(C++)
 
+# C++ requirements
+AC_CXX_REQUIRE_STL
+AC_CXX_NAMESPACES
+
+AC_LANG(C)
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_TYPE_SIZE_T
@@ -43,11 +49,6 @@ AC_FUNC_STRERROR_R
 AC_CHECK_FUNCS([strchr strdup strstr gmtime_r strtok_r strcasecmp])
 AC_CHECK_HEADERS([dlfcn.h])
 
-# C++ requirements
-AC_CXX_REQUIRE_STL
-AC_CXX_NAMESPACES
-
-
 # old_LIBS="$LIBS"
 # AC_SEARCH_LIBS(xdr_uint64_t,nsl,,
 #      [CFLAGS="$CFLAGS -DNEED_XDR_LONGLONG"
@@ -110,6 +111,8 @@ AC_TRY_LINK_FUNC([SSL_library_init],,
              AC_MSG_ERROR([unable to link with openssl libraries]))
 AC_MSG_RESULT(yes)
 
+AC_LANG(C++)
+
 # log4cpp settings
 AC_PATH_PROG(LOG4CPP_CONFIG,log4cpp-config)
 AC_ARG_WITH(log4cpp,