From c343bd38bdf131be09b32d2036bedd17f9dccdd8 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sat, 7 Nov 2020 00:33:16 +0100
Subject: configure: pass -pthread to Libs.private for pkg-config

Reported-by: Cristian Morales Vega
Fixes #6168
---
 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 7002744a2..bc206475a 100755
--- a/configure.ac
+++ b/configure.ac
@@ -4515,6 +4515,8 @@ if test "$want_pthreads" != "no"; then
       if test "$USE_THREADS_POSIX" != "1"
       then
         CFLAGS="$CFLAGS -pthread"
+        # assign PTHREAD for pkg-config use
+        PTHREAD=" -pthread"
         AC_CHECK_LIB(pthread, pthread_create,
                      [USE_THREADS_POSIX=1],
                      [ CFLAGS="$save_CFLAGS"])
@@ -4945,7 +4947,7 @@ CURL_CONFIGURE_SYMBOL_HIDING
 dnl
 dnl All the library dependencies put into $LIB apply to libcurl only.
 dnl
-LIBCURL_LIBS=$LIBS
+LIBCURL_LIBS="$LIBS$PTHREAD"
 
 AC_SUBST(LIBCURL_LIBS)
 AC_SUBST(CURL_NETWORK_LIBS)
-- 
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