The installs you recommended got pthread.h, sched.h and libpthread_2.dll OK. But I don't see a new semaphore.h -- do I need to install another package to get that?
The old headers are in c:/mingw/mingw32/include, while the new ones went into c:/mingw/include. Likewise for the import lib. Has there been a change in the official directory structure? The mingw that came with my Qt 4.6 -- which I have not touched -- has the old arrangement, and no pthreads dll (but of course Qt wouldn't need that).
I'm still rather in the dark about mingw-get. Is there a good human-readable list of the MinGW packages and what they contain? And what are the preconditions for using it to update Msys?
BTW I ran into a nasty little problem with gcc 4.5, sys/types.h and sched.h when building FFmpeg. sched.h is one of many bits of useful code that use old not_prefixed_with_underscore names for common system and C lib items. FFmpeg's build scripts pass --std=c99 to gcc, which now causes it to automatically #define _NO_OLDNAMES, which prevents sys/types.h from defining pid_t; however sched.h assumes that including sys/types.h will always define pid_t. It uses a fallback definition when it doesn't include sys/types.h, but does not detect the case that pid_t is undefined when it does. My fix is to make sched.h apply the fallback whenever pid_t is undefined.
FFmpeg really should not claim ANSI purity, it uses old names several places in libavformat; but I am not about to mess with an autoconf script.
MinGW gcc-4.5.0 ships with "libpthread-2.dll", not pthreadGC2.dll. TheOn 9/15/2010 1:14 AM, Thomas Sharpless wrote:
> My MinGW (recently updated with mingw-get to gcc 4.5) has headers and an
> export library for the pthread POSIX threading library, but no
> pthreadGC2.dll. I finally found it at the sourceware.org ftp site; but why
> was it not in the MinGW distribution?
headers are the same. If you have an import library for the latter,
then it is a leftover from an earlier version of MinGW gcc; the current
pthread import lib specifies libpthread-2.dll:
dlltool --identify libpthread.dll.a
Hmmm...it looks like the mingw32-pthreads-w32-dev is not installed by
mingw32-gcc4. I think that's a mistake; it should be installed
mingw-get install mingw32-pthreads-w32-dev
mingw-get install mingw32-libpthread-dll <<< this IS installed by
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