2 # Begin pthreads checking.
4 # First, decide whether to use multithreading or not.
6 # Enable multithreading by default on systems where it is known
7 # to work well, and where debugging of multithreaded programs
11 AC_MSG_CHECKING(whether to build with thread support)
17 # Thread signals are broken on Solaris 2.6; they are sometimes
18 # delivered to the wrong thread.
30 *-sco-sysv*uw*|*-*-sysv*UnixWare*)
37 # NetBSD earlier than NetBSD 5.0 has poor pthreads.
38 # Don't use it by default.
43 # OpenBSD users have reported that named dumps core on
44 # startup when built with threads.
49 # Thread signals do not work reliably on some versions of BSD/OS.
54 # Threads are disabled on Linux by default because most
55 # Linux kernels produce unusable core dumps from multithreaded
56 # programs, and because of limitations in setuid().
62 AC_ARG_ENABLE(threads,
63 [ --enable-threads enable multithreading])
64 case "$enable_threads" in
72 # Use system-dependent default
75 AC_MSG_ERROR([--enable-threads takes yes or no])
89 # Search for / configure pthreads in a system-dependent fashion.
93 # We don't want to set -lpthread as that break
94 # the ability to choose threads library at final
95 # link time and is not valid for all architectures.
98 if test "X$GCC" = "Xyes"; then
101 AC_MSG_CHECKING(for gcc -pthread support);
102 AC_TRY_LINK([#include <pthread.h>],
103 [printf("%x\n", pthread_create);],
109 if test "X$PTHREAD" != "Xyes"; then
110 AC_CHECK_LIB(pthread, pthread_create,,
111 AC_CHECK_LIB(thr, thread_create,,
112 AC_CHECK_LIB(c_r, pthread_create,,
113 AC_CHECK_LIB(c, pthread_create,,
114 AC_MSG_ERROR("could not find thread libraries")))))
118 AC_CHECK_LIB(pthread, pthread_create,,
119 AC_CHECK_LIB(pthread, __pthread_create,,
120 AC_CHECK_LIB(pthread, __pthread_create_system,,
121 AC_CHECK_LIB(c_r, pthread_create,,
122 AC_CHECK_LIB(c, pthread_create,,
123 AC_MSG_ERROR("could not find thread libraries"))))))