It was reported in <https://savannah.gnu.org/bugs/?32087> that the PTHREAD_IN_USE_DETECTION_HARD setting that causes a dummy thread to be created at runtime, just to see whether multithreading is really enabled, is no longer necessary in Solaris 10.
This is true according to the Solaris doc: https://docs.oracle.com/cd/E19205-01/819-5264/afanb/index.html https://docs.oracle.com/cd/E18752_01/html/816-5137/compile-94611.html 2016-12-10 Bruno Haible <br...@clisp.org> threadlib: Optimize out runtime test on Solaris >= 10. * m4/threadlib.m4 (gl_THREADLIB_BODY): Don't set PTHREAD_IN_USE_DETECTION_HARD if configuring on Solaris 10 or newer. Reported by Peter Felecan at <https://savannah.gnu.org/bugs/?32087>. diff --git a/m4/threadlib.m4 b/m4/threadlib.m4 index b43534e..2b6b6cf 100644 --- a/m4/threadlib.m4 +++ b/m4/threadlib.m4 @@ -1,4 +1,4 @@ -# threadlib.m4 serial 11 (gettext-0.18.2) +# threadlib.m4 serial 12 dnl Copyright (C) 2005-2016 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -195,8 +195,10 @@ int main () # Therefore pthread_in_use() needs to actually try to create a # thread: pthread_create from libc will fail, whereas # pthread_create will actually create a thread. + # On Solaris 10 or newer, this test is no longer needed, because + # libc contains the fully functional pthread functions. case "$host_os" in - solaris* | hpux*) + solaris | solaris2.[1-9] | solaris2.[1-9].* | hpux*) AC_DEFINE([PTHREAD_IN_USE_DETECTION_HARD], [1], [Define if the pthread_in_use() detection is hard.]) esac
