Not in this context, no. Nor should you want to in this context (inside the compiling module). Generally in Makefiles it would be a bad idea too, but there’s sometimes you need to know. But there’s currently not any such instances in the tree.
Warner > On Jul 8, 2015, at 4:04 PM, 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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