On Thu, 28 Feb 2013, Jeffrey Walton wrote:
I'm having trouble compiling sources adorned with the aligned
attribute under Clang 3.1. Clang claims its GCC 4.2.1 compatible:
$ clang -dM -E -x c /dev/null | grep -i gnuc
#define __GNUC_MINOR__ 2
#define __GNUC_PATCHLEVEL__ 1
#define __GNUC_STDC_INLINE__ 1
#define __GNUC__ 4
When did GCC add support for function and variable attributes?
Specifically, __attribute__(aligned) for x86/x64? Did the aligned
attribute come into being after GCC 4.2?
That wouldn't be the only place where clang is not perfectly compatible
with gcc...
http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
http://gcc.gnu.org/onlinedocs/gcc/Variable-Attributes.html
When you click on "Manual" on gcc's webpage, you are sent to a list of
manuals per version:
http://gcc.gnu.org/onlinedocs/
Seems easy to check the oldest one:
http://gcc.gnu.org/onlinedocs/gcc-2.95.3/gcc_4.html#SEC90
(and if it hadn't been supported then, you could have used a dichotomy)
--
Marc Glisse
