On 07/08/15 17:18, Dimitry Andric wrote:
Check whether the path starts with /usr/bin, maybe? Normally, you would
check for the existence of a random header in a configure script. But
from within a C source file, it's not that easy.
That said, immintrin.h is available for all usable versions of clang,
and should be available in all versions of gcc >= 4.4 (at least, if I
read gcc's commit history correctly). And gcc in base is definitely not
4.4. :-)
Ahh yes, it's probably gcc 4.4 (I stopped following their changes
long ago). Our internal gcc carries a couple of headers that were
introduced in gcc 4.3 before the license change.
Pedro.
-Dimitry
On 09 Jul 2015, at 00:04, Adrian Chadd <adrian.ch...@gmail.com> wrote:
Is there a blessed way to see whether the compiler we're using is an
external compiler, or an internal one?
eg, the version check isn't enough - it's just a number. how do I know
if it's freebsd clang versus upstream clang?
(Or in my instance, freebsd-gcc versus upstream-gcc.)
-a
On 8 July 2015 at 14:09, Pedro Giffuni <p...@freebsd.org> wrote:
On 07/08/15 13:36, Luigi Rizzo wrote:
Author: luigi
Date: Wed Jul 8 18:36:37 2015
New Revision: 285284
URL: https://svnweb.freebsd.org/changeset/base/285284
Log:
only enable immintrin when clang is used. The base gcc does not support
it.
Reviewed by: delphij
Modified:
head/lib/liblzma/config.h
Modified: head/lib/liblzma/config.h
==============================================================================
--- head/lib/liblzma/config.h Wed Jul 8 18:12:24 2015 (r285283)
+++ head/lib/liblzma/config.h Wed Jul 8 18:36:37 2015 (r285284)
@@ -150,7 +150,8 @@
#define HAVE_ICONV 1
/* Define to 1 if you have the <immintrin.h> header file. */
-#if defined(__FreeBSD__) && defined(__amd64__)
+/* FreeBSD - only with clang because the base gcc does not support it */
+#if defined(__clang__) && defined(__FreeBSD__) && defined(__amd64__)
#define HAVE_IMMINTRIN_H 1
#endif
FWIW, gcc 4.3+ does have it so this may some undesired (but hidden)
effect when building with an external gcc.
Pedro.
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