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build-sys: C++11 is only required for WebRTC support

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Make C++11 support optional and explicitly check for gnu++11.

Stop the build only if no C++11 support has been found and WebRTC
support has been requested.

Fixes:
http://autobuild.buildroot.net/results/d89/d897a94a8b6a52eba03d04c24536f554a7643000

Signed-off-by: Romain Naour <romain.naour@gmail.com>
This commit is contained in:
Romain Naour 2016-07-06 16:04:27 +02:00 • committed by Arun Raghavan
parent 80c732e4c1
commit a7231692e9
1 changed files with 4 additions and 1 deletions
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5
configure.ac
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@ -84,7 +84,7 @@ AM_PROG_CC_C_O
# Only required if you want the WebRTC canceller -- no runtime dep on
# libstdc++ otherwise
AC_PROG_CXX
AX_CXX_COMPILE_STDCXX_11
AX_CXX_COMPILE_STDCXX_11([ext],[optional])
AC_PROG_GCC_TRADITIONAL
AC_USE_SYSTEM_EXTENSIONS
@ -1410,6 +1410,9 @@ fi
AC_ARG_ENABLE([webrtc-aec],
AS_HELP_STRING([--enable-webrtc-aec], [Enable the optional WebRTC-based echo canceller]))
AS_IF([test "x$enable_webrtc_aec" = "xyes" && test "$HAVE_CXX11" = "0"],
[AC_MSG_ERROR([*** webrtc-audio-processing needs C++11 support])])
AS_IF([test "x$enable_webrtc_aec" != "xno"],
[PKG_CHECK_MODULES(WEBRTC, [ webrtc-audio-processing >= 0.2 ], [HAVE_WEBRTC=1], [HAVE_WEBRTC=0])],
[HAVE_WEBRTC=0])