From ea10f7de0a37282047630b2e84a52a5605269b26 Mon Sep 17 00:00:00 2001
From: Francesco Chemolli <5175948+kinkie@users.noreply.github.com>
Date: Mon, 23 Sep 2024 02:09:29 +0000
Subject: [PATCH] Bug 5428: Warn if pkg-config is not found (#1902)

Squid builds without pkg-config, but results are likely to surprise
administrators because many optional features will not be
default-enabled despite properly installed libraries.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 19a5cbe7f85..58481fed7fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -117,6 +117,10 @@ dnl Libtool 2.2.6 requires: rm -f
 RM="$RM -f"
 
 PKG_PROG_PKG_CONFIG
+AS_IF([test "x$PKG_CONFIG" = "x"],[
+  AC_MSG_WARN([pkg-config not found. Many optional features with external dependencies will not be enabled by default, usually without further warnings.])
+])
+
 
 AC_PATH_PROG(PERL, perl, none)
 AS_IF([test "x$ac_cv_path_PERL" = "xnone"],[