Mesa (master): configure: require pthreads for POSIX builds

[Emil Velikov]

Module: Mesa
Branch: master
Commit: 39f90e6b9bb0c9c8b40abae2afde07587cd49010
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=39f90e6b9bb0c9c8b40abae2afde07587cd49010

Author: Emil Velikov <emil.l.velikov at gmail.com>
Date:   Fri Mar  6 16:54:57 2015 +0000

configure: require pthreads for POSIX builds

This has been an implicit rule for building mesa for a long time. Let's
make it official and just bail out at configure time. This way we can
cleaning up some of our glx code.

Signed-off-by: Emil Velikov <emil.l.velikov at gmail.com>
Reviewed-by: Brian Paul <brianp at vmware.com>

---

 configure.ac |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index 2954f80..a3b0ebd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -658,6 +658,9 @@ mingw*)
     ;;
 *)
     AX_PTHREAD
+    if test "x$ax_pthread_ok" = xno; then
+        AC_MSG_ERROR([Building mesa on this platform requires pthreads])
+    fi
     ;;
 esac
 dnl AX_PTHREADS leaves PTHREAD_LIBS empty for gcc and sets PTHREAD_CFLAGS