1 files changed, 3 insertions, 0 deletions
diff --git a/configure b/configure
index e39c16eee2..c34a13fb58 100755
--- a/configure
+++ b/configure
@@ -10406,6 +10406,9 @@ then
 
     posix_threads=yes
     THREADOBJ="Python/thread.o"
+    if test "$ac_sys_system" = "SunOS"; then
+        CFLAGS="$CFLAGS -D_REENTRANT"
+    fi
 elif test "$ac_cv_kpthread" = "yes"
 then
     CC="$CC -Kpthread"