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-rw-r--r--ext/readline/php_readline.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/ext/readline/php_readline.h b/ext/readline/php_readline.h
index 6080489258..72ca7187d0 100644
--- a/ext/readline/php_readline.h
+++ b/ext/readline/php_readline.h
@@ -22,6 +22,13 @@
#define _PHP_READLINE_H
#if HAVE_LIBREADLINE
+#ifdef ZTS
+#error Readline module will *NEVER* be thread-safe
+#endif
+
+#ifndef CGI_BINARY
+#error Readline module only useable in standalone-binary
+#endif
extern zend_module_entry readline_module_entry;
#define phpext_readline_ptr &readline_module_entry