From 94eed5c8be51e390bb8feb61112d46cc2c83ac64 Mon Sep 17 00:00:00 2001
From: Ryan Carsten Schmidt <git@ryandesign.com>
Date: Sun, 21 Apr 2024 17:31:09 -0500
Subject: [PATCH] Only use once_flag/tss_t vars if we have threads.h

Partial fix for #1495
---
 link-grammar/dict-common/regex-morph.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/link-grammar/dict-common/regex-morph.c b/link-grammar/dict-common/regex-morph.c
index cc342e756..2743e0b02 100644
--- a/link-grammar/dict-common/regex-morph.c
+++ b/link-grammar/dict-common/regex-morph.c
@@ -166,8 +166,11 @@ static void reg_free(Regex_node *rn)
 /* ========================================================================= */
 #if HAVE_PCRE2_H
 
+#if HAVE_THREADS_H && !__EMSCRIPTEN__
 static once_flag call_once_flag = ONCE_FLAG_INIT;
 static tss_t re_md_key;
+#endif // HAVE_THREADS_H && !__EMSCRIPTEN__
+
 static void alloc_key(void)
 {
 	int rc = tss_create(&re_md_key, (tss_dtor_t) pcre2_match_data_free);