1. Clarification: -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT should be specified explicitly. During linking, -lpthread should be specified explictly.
/kristofer On Mon, 31 Mar 2003, Spinka, Kristofer wrote: > 1. It's an out of date, and Solaris-biased (as opposed to POISX), man > page. Even on Solaris 9. > > ==== > http://docs.sun.com/source/816-2454/cc_ops.app.html#pgfId-999925 > > A.3.42 -mt > Macro option that expands to -D_REENTRANT -lthread. If you are doing your > own multithread coding, you must use this option in the compile and link > steps. To obtain faster execution, this option requires a multiprocessor > system. On a single-processor system, the resulting executable usually > runs more slowly with this option. > ==== > > 2. _POSIX_C_SOURCE=199506L tells the compiler to use POSIX.1c interfaces > as opposed to Solaris (or other) interfaces for symbols that might have the > same name. I suppose apr/httpd could get by with just > _POSIX_PTHREAD_SEMANTICS, to take care of the threads, but I think it > would be a benefit to be sure that the correct (POISX) sections of the > Solaris header files are being processed. > > /kristofer > > On Mon, 31 Mar 2003, Jeff Trawick wrote: > > > Spinka, Kristofer wrote: > > > To be sure that the compiler is respecting the POSIX behavior, remove > > > the "-mt" and add "-D_POSIX_C_SOURCE=199506L" and link with -lpthread. > > > > "man pthread_create" says "cc -mt foo.c -lpthread" > > > > _POSIX_C_SOURCE=199506L sounds like something to force my program to use > > only those interfaces described in some particular document... we want > > access to everything the platform offers > > > > > > >
