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 <[email protected]>
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index 90c7737..4989444 100644
--- a/configure.ac
+++ b/configure.ac
@@ -657,6 +657,9 @@ 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
-- 
2.1.3

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