On 6/20/05, Toon Knapen <toon.knapen@fft.be> wrote:
Caleb Epstein wrote:
Well, there is code in libs/filesystem/src/operations_posix_windows.cpp that attempts to detect if it is being compiled with multi-threading enabled:
# if defined(_POSIX_THREAD_SAFE_FUNCTIONS) \ && defined(_SC_THREAD_SAFE_FUNCTIONS) \ && (_POSIX_THREAD_SAFE_FUNCTIONS+0 >= 0)
Presumably aCC sets these macros incorrectly, or this code is not correct. Maybe the check should be for >0?
Since somebody suggested that _REENTRANT is defined on HP when the '-mt' flag is used, what about only adding adding following to this #if
# if defined(_POSIX_THREAD_SAFE_FUNCTIONS) \ && defined(_SC_THREAD_SAFE_FUNCTIONS) \ && (_POSIX_THREAD_SAFE_FUNCTIONS+0 >= 0) || (defined(__HP_aCC) && defined(_REENTRANT))
I don't use boost build, but I thought the existing ifdef block seemed like it should work. I don't know much about HPUX on Itanium, but I went grepping on my HP 11i box, and found the _POSIX_THREAD_SAFE_FUNCTIONS define in /usr/include/sys/unistd.h. Then I remembered that to use the new posix friendly APIs on 11i, you need a -D_POSIX_C_SOURCE=199506L. I'd bet that if you added that to your build, things would work a lot more nicely. I think that define is only contra-indicated if you're still trying to use CMA threads (which is not a good idea). If you do end up needing a modification of the define block above, I'd recommend __hpux rather than __HP_aCC since this is a platform issue rather than a compiler issue.