From 822bf267121b8e380037da3db4ad31aca34fc7c7 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 11 Sep 2023 07:09:48 +0000
Subject:  Add a pthread sysdep

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 configure                |  9 +++++----
 src/sysdeps/trypthread.c | 24 ++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 4 deletions(-)
 create mode 100644 src/sysdeps/trypthread.c

diff --git a/configure b/configure
index 748e70d..1e058c0 100755
--- a/configure
+++ b/configure
@@ -597,10 +597,11 @@ fi
 echo "$socket_lib" > $sysdeps/socket.lib
 
 trylibs clockrt sysclock 'clock_gettime()' -lrt
-choose cl clockmon CLOCK_MONOTONIC `cat "${sysdeps}/sysclock.lib"`
-choose cl clockboot CLOCK_BOOTTIME `cat "${sysdeps}/sysclock.lib"`
+choose cl clockmon CLOCK_MONOTONIC $sysclock_lib
+choose cl clockboot CLOCK_BOOTTIME $sysclock_lib
 trylibs posixspawn spawn 'posix_spawn()' -lrt
 trylibs timer timer 'timer_create()' -lrt
+trylibs pthread pthread 'pthread support' -lpthread -lrt
 
 tryendianness
 trytypes
@@ -640,11 +641,11 @@ choose cl explicit_bzero 'explicit_bzero()'
 choose cl getrandom 'getrandom()'
 choose cl grndinsecure 'GRND_INSECURE'
 choose cl chroot 'chroot()'
-choose cl posixspawnsetsid 'POSIX_SPAWN_SETSID' ${spawn_lib}
+choose cl posixspawnsetsid 'POSIX_SPAWN_SETSID' $spawn_lib
 
 # Here are the evil irreducible run-time sysdeps.
 choose clr devurandom '/dev/urandom'
-choose clr posixspawnearlyreturn 'posix_spawn() incorrectly returning early' ${spawn_lib}
+choose clr posixspawnearlyreturn 'posix_spawn() incorrectly returning early' $spawn_lib
 
 
 # Finally, produce config.mak and config.h
diff --git a/src/sysdeps/trypthread.c b/src/sysdeps/trypthread.c
new file mode 100644
index 0000000..8e2e459
--- /dev/null
+++ b/src/sysdeps/trypthread.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <time.h>
+#include <pthread.h>
+
+void *pstart (void *)
+{
+  return 0 ;
+}
+
+int main (void)
+{
+  pthread_t th ;
+  pthread_attr_t attr ;
+  pthread_cond_t cond = PTHREAD_COND_INITIALIZER ;
+  pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER ;
+  struct timespec ts = { .tv_sec = 1, .tv_nsec = 0 } ;
+  void *p ;
+  int e = pthread_attr_init(&attr) ;
+  e = pthread_create(&th, &attr, &pstart, 0) ;
+  e = pthread_cond_timedwait(&cond, &mutex, &ts) ;
+  e = pthread_join(th, &p) ;
+  return 0 ;
+}
-- 
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