From e15faa7b670ae595082fc2aaa3fc05434820a5db Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Tue, 23 Aug 2022 15:12:09 +0200
Subject: [PATCH] Fix for old CMake

---
 cmake/Modules/FindGNURADIO.cmake                           | 6 +++++-
 src/algorithms/input_filter/gnuradio_blocks/CMakeLists.txt | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/cmake/Modules/FindGNURADIO.cmake b/cmake/Modules/FindGNURADIO.cmake
index 400885ede..a8f0b2a90 100644
--- a/cmake/Modules/FindGNURADIO.cmake
+++ b/cmake/Modules/FindGNURADIO.cmake
@@ -416,7 +416,11 @@ if(GNURADIO_RUNTIME_INCLUDE_DIRS)
                 PURPOSE "Required by GNU Radio."
                 TYPE REQUIRED
             )
-            target_link_libraries(Gnuradio::filter INTERFACE Log4cpp::log4cpp)
+            if(CMAKE_VERSION VERSION_GREATER 3.0)
+                target_link_libraries(Gnuradio::filter INTERFACE Log4cpp::log4cpp)
+            else()
+                set(LOG4CPP_WITH_OLD_CMAKE TRUE)
+            endif()
         endif()
         if(${_uses_spdlog})
             find_package(spdlog REQUIRED CONFIG)
diff --git a/src/algorithms/input_filter/gnuradio_blocks/CMakeLists.txt b/src/algorithms/input_filter/gnuradio_blocks/CMakeLists.txt
index c65727296..51113a267 100644
--- a/src/algorithms/input_filter/gnuradio_blocks/CMakeLists.txt
+++ b/src/algorithms/input_filter/gnuradio_blocks/CMakeLists.txt
@@ -53,6 +53,13 @@ target_include_directories(input_filter_gr_blocks
         ${GNSSSDR_SOURCE_DIR}/src/core/interfaces
 )
 
+if(LOG4CPP_WITH_OLD_CMAKE)
+    target_link_libraries(input_filter_gr_blocks
+        PRIVATE
+        Log4cpp::log4cpp
+    )
+endif()
+
 if(GNURADIO_USES_STD_POINTERS)
     target_compile_definitions(input_filter_gr_blocks
         PUBLIC -DGNURADIO_USES_STD_POINTERS=1