[PATCH 1/4] build: Add c++ build support

[Hongzhan Chen via Xenomai]

Add c++ build support or use specific c++ compiler

Signed-off-by: Hongzhan Chen <hongzhan.c...@intel.com>
---
 configure.ac | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/configure.ac b/configure.ac
index 0389cf008..16cffd8f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,6 +79,18 @@ AC_ARG_WITH(cc,
     ])
 AC_PROG_CC
 
+AC_ARG_WITH(cxx,
+    AS_HELP_STRING([--with-cxx=compiler],[use specific C++ compiler]),
+    [
+       case "$withval" in
+       "" | y | ye | yes | n | no)
+           AC_MSG_ERROR([You must supply an argument to --with-cxx])
+         ;;
+       esac
+       CXX="$withval"
+    ])
+AC_PROG_CXX
+
 # Do not let autoconf set the default value of CFLAGS
 if $XENO_EMPTY_CFLAGS; then
        CFLAGS=""
-- 
2.17.1