From 93630ec7711dc7bd29200d9167b88ff9c86f5e6e Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Sat, 6 May 2023 16:29:35 +0200
Subject: cmake: Use version script

---
 CMakeLists.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 022f345a..a8e12c21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.18)
 
 file(STRINGS "configure.ac" CONFIGURE_AC_LINES)
 foreach(line ${CONFIGURE_AC_LINES})
@@ -28,6 +28,7 @@ include(CheckCSourceCompiles)
 include(CheckFunctionExists)
 include(CheckIncludeFiles)
 include(CheckLibraryExists)
+include(CheckLinkerFlag)
 include(CheckSymbolExists)
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
@@ -90,6 +91,14 @@ if(CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID STREQUAL "GNU")
 -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return \
 -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline \
 -Wredundant-decls -Wno-long-long -Wno-format-extra-args")
+
+	if(BUILD_SHARED_LIBS AND UNIX AND NOT APPLE)
+		check_linker_flag(C "LINKER:--undefined-version" FLAG_UNDEFINED_VERSION)
+		if (FLAG_UNDEFINED_VERSION)
+			target_link_options(LibXslt PRIVATE "LINKER:--undefined-version")
+		endif()
+		target_link_options(LibXslt PRIVATE "LINKER:--version-script=${CMAKE_CURRENT_SOURCE_DIR}/libxslt/libxslt.syms")
+	endif()
 endif()
 
 if(LIBXSLT_WITH_CRYPTO AND NOT WIN32)
-- 
cgit v1.2.1