From 7ec90527b782abbcd4140febcab4791962eaf37b Mon Sep 17 00:00:00 2001
From: Tobiasz Laskowski <tobil4sk@outlook.com>
Date: Sun, 16 Aug 2026 15:36:18 +0100
Subject: [PATCH] [cmake] Disallow undefined symbols in most ndlls

If a symbol is undefined, it may cause a load time error. We can catch
this at link time instead by using --no-undefined. Some ndlls
intentionally allow undefined symbols, so this is not applied
universally.
---
 libs/regexp/CMakeLists.txt | 4 ++++
 libs/sqlite/CMakeLists.txt | 4 ++++
 libs/ssl/CMakeLists.txt    | 4 ++++
 libs/std/CMakeLists.txt    | 4 ++++
 libs/ui/CMakeLists.txt     | 4 ++++
 libs/zlib/CMakeLists.txt   | 4 ++++
 6 files changed, 24 insertions(+)

diff --git a/libs/regexp/CMakeLists.txt b/libs/regexp/CMakeLists.txt
index aa91e863..20763827 100644
--- a/libs/regexp/CMakeLists.txt
+++ b/libs/regexp/CMakeLists.txt
@@ -78,6 +78,10 @@ set_target_properties(regexp.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(regexp.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS regexp.ndll
 	DESTINATION ${DEST_NDLL}
diff --git a/libs/sqlite/CMakeLists.txt b/libs/sqlite/CMakeLists.txt
index 5a219bde..5609ca3b 100644
--- a/libs/sqlite/CMakeLists.txt
+++ b/libs/sqlite/CMakeLists.txt
@@ -40,6 +40,10 @@ set_target_properties(sqlite.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(sqlite.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS sqlite.ndll
 	DESTINATION ${DEST_NDLL}
diff --git a/libs/ssl/CMakeLists.txt b/libs/ssl/CMakeLists.txt
index 93471683..25d56365 100644
--- a/libs/ssl/CMakeLists.txt
+++ b/libs/ssl/CMakeLists.txt
@@ -78,6 +78,10 @@ set_target_properties(ssl.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(ssl.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS ssl.ndll
 	DESTINATION ${DEST_NDLL}
diff --git a/libs/std/CMakeLists.txt b/libs/std/CMakeLists.txt
index 49f83d70..5b4b44a7 100644
--- a/libs/std/CMakeLists.txt
+++ b/libs/std/CMakeLists.txt
@@ -39,6 +39,10 @@ set_target_properties(std.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(std.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS std.ndll
 	DESTINATION ${DEST_NDLL}
diff --git a/libs/ui/CMakeLists.txt b/libs/ui/CMakeLists.txt
index e53b77c8..dd55c615 100644
--- a/libs/ui/CMakeLists.txt
+++ b/libs/ui/CMakeLists.txt
@@ -26,6 +26,10 @@ set_target_properties(ui.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(ui.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS ui.ndll
 	DESTINATION ${DEST_NDLL}
diff --git a/libs/zlib/CMakeLists.txt b/libs/zlib/CMakeLists.txt
index 38a20bb1..600d1897 100644
--- a/libs/zlib/CMakeLists.txt
+++ b/libs/zlib/CMakeLists.txt
@@ -18,6 +18,10 @@ set_target_properties(zlib.ndll
 	SUFFIX .ndll
 )
 
+if (UNIX AND NOT APPLE)
+	target_link_options(zlib.ndll PRIVATE "-Wl,--no-undefined")
+endif()
+
 install (
 	TARGETS zlib.ndll
 	DESTINATION ${DEST_NDLL}