Some pthreads symbols might be present in libc (as shown on various *BSD) but
not all of them, leading to false positives.

Check for the most common compiler flags before the plain symbol check
to avoid known pitfalls.
---
 configure | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index a843370..8ebb934 100755
--- a/configure
+++ b/configure
@@ -3841,9 +3841,7 @@ fi
 # do this before the optional library checks as some of them require pthreads
 if ! disabled pthreads && ! enabled w32threads; then
     enable pthreads
-    if check_func pthread_join; then
-        :
-    elif check_func pthread_join -pthread; then
+    if check_func pthread_join -pthread; then
         add_cflags -pthread
         add_extralibs -pthread
     elif check_func pthread_join -pthreads; then
@@ -3851,7 +3849,9 @@ if ! disabled pthreads && ! enabled w32threads; then
         add_extralibs -pthreads
     elif check_func pthread_join -lpthreadGC2; then
         add_extralibs -lpthreadGC2
-    elif ! check_lib pthread.h pthread_join -lpthread; then
+    elif check_lib pthread.h pthread_join -lpthread; then
+        :
+    elif ! check_func pthread_join; then
         disable pthreads
     fi
 fi
-- 
1.8.5.1

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