On 09/08/2014 02:44 AM, Thomas Jahns wrote: > On 09/08/14 06:24, Paul Smith wrote: >> In particular, this: >> >> configure:3666: checking whether we are using the GNU C compiler >> configure:3685: clang -c -mmacosx-version-min=10.6 conftest.c >&5 >> configure:3685: $? = 0 >> configure:3694: result: yes >> >> Appears to show that clang is defining the __GNUC__ built-in compiler >> flag, presumably for compatibility with GCC source code. So IF there's >> any real problem here, which I'm not sure there is, the problem is in >> clang claiming to be something it's not. > > Happens just the same for icc and since the Intel compiler supports enough of > the pragma's and non-std features of gcc, this works out fine for me so far.
Maybe it's as simple as patching autoconf to change the message to "checking whether the compiler understands GNU C extensions", to match the reality of how it works these days. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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