diff options
Diffstat (limited to 'pm_config.in.h')
| -rw-r--r-- | pm_config.in.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/pm_config.in.h b/pm_config.in.h index f0d83e1e..3e2f781c 100644 --- a/pm_config.in.h +++ b/pm_config.in.h @@ -226,7 +226,7 @@ /* If the compiler is Clang, ignore reported __GNUC__ , __GNUC_MINOR__ - values. Treat it as a generic c compiler. Clang normally reports itself + values. Treat it as a generic C compiler. Clang normally reports itself as GCC, but does not necessarily offer all the features of GCC. For example, we know that Apple Mac OSX 10.8 ships with @@ -236,6 +236,11 @@ which masquerades as GCC 4.2.1, but it does not have SSE2 function __builtin_ia32_pcmpeqb128 . + On the other hand, research by Prophet of the Way in September 2012 + indicated that Clang 2.6-3.0 have the above function (and all Netpbm + compiled successfully with SSE exploitation), but 3.1 does not. He did + not find any mention in documentation of that change. + See below on compilers other than GCC that set __GNUC__: http://sourceforge.net/apps/mediawiki/predef/index.php?title=Compilers */ |