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$NetBSD: patch-waflib_Tools_c__config.py,v 1.1 2019/12/22 22:21:58 joerg Exp $
When detecting the C++ compiler, force C++ mode for stdin as the wrappers
add -std=c++11 and that breaks for C input.
--- waflib/Tools/c_config.py.orig 2019-12-21 22:11:24.000906920 +0000
+++ waflib/Tools/c_config.py
@@ -632,7 +632,7 @@ def cxx_load_tools(conf):
conf.load('cxx')
@conf
def get_cc_version(conf,cc,gcc=False,icc=False,clang=False):
- cmd=cc+['-dM','-E','-']
+ cmd=cc+(['-x','c++']if cc[0].endswith('+')else[])+['-dM','-E','-']
env=conf.env.env or None
try:
out,err=conf.cmd_and_log(cmd,output=0,input='\n'.encode(),env=env)
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