From d45666cc5bc7fb325f38e139032b799bd942ec7b Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi92@disroot.org>
Date: Thu, 12 Feb 2026 22:51:53 +0100
Subject: configure: Test zlib

Otherwise, compilation could fail because zlib's header files and/or
library cannot be found on the system.

Additionally, since fdzipstream depends on zlib, zlib's ldflags must be
appended to those from fdzipstream, rather than hardcoding -lz.
---
 configure | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 80518fa..cb55099 100755
--- a/configure
+++ b/configure
@@ -107,7 +107,16 @@ else
 	echo "Info: fdzipstream not found. Using in-tree copy" >&2
 	in_tree_fdzipstream=1
 	CFLAGS="$CFLAGS -Ifdzipstream/fdzipstream"
-	LDFLAGS="$LDFLAGS -Lfdzipstream -lfdzipstream -lz"
+	LDFLAGS="$LDFLAGS -Lfdzipstream -lfdzipstream"
+fi
+
+if pkg-config zlib
+then
+	CFLAGS="$CFLAGS $(pkg-config --cflags zlib)"
+	LDFLAGS="$LDFLAGS $(pkg-config --libs zlib)"
+else
+	echo "Error: zlib not found." >&2
+	exit 1
 fi
 
 cleanup()
-- 
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