[Bug libfortran/47802] [4.6 Regression] libgfortran/intrinsics/ctime.c:75:3: error: too few arguments to function 'ctime_r'

["dave at hiauly1 dot hia.nrc.ca" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47802

--- Comment #38 from dave at hiauly1 dot hia.nrc.ca 2011-03-10 16:58:38 UTC ---
> While the latter is fixed, I think the _REENTRANT issue isn't. Or is it?
> 
> If it it not fixed, I think we should have (a different) PR open to track that
> issue. Dave, you wrote you were testing a patch for _REENTRANT ...

Correct, I have a patch which I have been testing.  While it seems to
work, there is one issue that I don't particularly like.

`-threads' is a multilib option handled completely by the gcc driver.
It is not passed to the standard option processing, so I wasn't able
to find a way to check for `-threads' in TARGET_OS_CPP_BUILTINS.
Currently, I define  _REENTRANT whenever we define _HPUX_SOURCE in
TARGET_OS_CPP_BUILTINS.  It is also defined by CPP_SPEC when -threads
is specified.  As a result, there are some situations where _REENTRANT
is effectively defined twice.

This could be avoided if _REENTRANT was only defined in CPP_SPEC but
it is difficult to duplicate the option handling in TARGET_OS_CPP_BUILTINS.

Since I haven't seen any actual problems with the current patch, I think
I will commit it tonight.

Dave