http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40411
--- Comment #27 from Sean McGovern <gseanmcg at gmail dot com> 2012-06-01 14:23:21 UTC --- I just found out how ugly this can get. freopen(3C) has different behaviour in the case where the first argument is NULL depending on if SUSv3 behaviour has been enabled by including values-xpg6.o and defining _XOPEN_SOURCE = 600. Here's the prototype from Solaris 10 8/11: FILE *freopen(const char *filename, const char *mode, FILE *stream); >From the freopen(3C) manpage: If filename is a null pointer and the application comforms to SUSv3 (see standards(5)), the freopen() function attempts to change the mode of the stream to that specified by mode, as though the name of the file currently associated with the stream had been used. <...> If the filename is a null pointer and the application does not comform to SUSv3, freopen() returns a null pointer.
