Make sure we can still compile with the JIT disabled

If `--disable-jit-support` is passed to configure, then `jit_func` is
removed from the iseq body and we can't compile YJIT.  This commit
detects when the JIT function pointer is gone and disables YJIT in that
case.

1 files changed, 2 insertions, 0 deletions

diff --git a/yjit.h b/yjit.h
index 0e7a7b6c9b..5d27d4f4a7 100644
--- a/yjit.h
+++ b/yjit.h
@@ -14,6 +14,8 @@
 #define PLATFORM_SUPPORTED_P 1
 #endif
 
+#define JIT_ENABLED USE_MJIT
+
 #ifndef YJIT_CHECK_MODE
 #define YJIT_CHECK_MODE 0
 #endif