https://gitlab.com/fastjet/fastjet/-/merge_requests/29
From c47b6dca4e6d7b5bed5e73366b9adcac25f78a0f Mon Sep 17 00:00:00 2001
From: Alexander Puck Neuwirth <alexander@neuwirth-informatik.de>
Date: Sun, 21 Sep 2025 12:35:13 +0200
Subject: [PATCH] Forward CMake BUILD_SHARED_LIBS as HAS_SHARED to
 fastjet-config generation

Closes: https://gitlab.com/fastjet/fastjet/-/issues/8
---
 CMakeLists.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4b4bb6fe..31a61966 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -398,6 +398,14 @@ set(CONFIG_LIBS_PLUGINS "-lfastjetplugins")
 if (FASTJET_ENABLE_PLUGIN_SISCONE) 
   set(CONFIG_LIBS_PLUGINS "${CONFIG_LIBS_PLUGINS} -lsiscone -lsiscone_spherical")
 endif()
+
+# Set shared library variables
+if (BUILD_SHARED_LIBS OR NOT DEFINED BUILD_SHARED_LIBS)
+  set(HAS_SHARED "yes")
+else()
+  set(HAS_SHARED "no")
+endif()
+
 configure_file(fastjet-config.in fastjet-config)
 
 install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/fastjet-config DESTINATION ${CMAKE_INSTALL_BINDIR})
-- 
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