Compile tests but fail linking

tests/CMakeLists.txt

@@ -24,6 +24,7 @@ target_link_libraries(svm_classifier_tests
         svm_classifier
         Catch2::Catch2WithMain
         nlohmann_json::nlohmann_json
+        $<$<TARGET_EXISTS:blas_functions>:blas_functions>
 )
 
 # Set include directories - Handle external libraries dynamically
@@ -32,6 +33,20 @@ target_include_directories(svm_classifier_tests
         ${CMAKE_SOURCE_DIR}/include
 )
 
+# Add Catch2 include directories explicitly
+if(TARGET Catch2::Catch2)
+    get_target_property(CATCH2_INCLUDE_DIRS Catch2::Catch2 INTERFACE_INCLUDE_DIRECTORIES)
+    target_include_directories(svm_classifier_tests PRIVATE ${CATCH2_INCLUDE_DIRS})
+endif()
+
+# Also add the source directory of Catch2 if available
+if(catch2_SOURCE_DIR)
+    target_include_directories(svm_classifier_tests
+        PRIVATE
+            ${catch2_SOURCE_DIR}/src
+    )
+endif()
+
 # Add libsvm include directory if available
 if(EXISTS "${CMAKE_CURRENT_BINARY_DIR}/../_deps/libsvm-src")
     target_include_directories(svm_classifier_tests 

tests/test_data_converter.cpp

@@ -3,7 +3,8 @@
  * @brief Unit tests for DataConverter class
  */
 
-#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
 #include <svm_classifier/data_converter.hpp>
 #include <torch/torch.h>
 

tests/test_kernel_parameters.cpp

@@ -3,7 +3,8 @@
  * @brief Unit tests for KernelParameters class
  */
 
-#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
 #include <svm_classifier/kernel_parameters.hpp>
 #include <nlohmann/json.hpp>
 

tests/test_main.cpp

@@ -7,7 +7,7 @@
  */
 
 #define CATCH_CONFIG_MAIN
-#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
 #include <torch/torch.h>
 #include <iostream>
 

tests/test_multiclass_strategy.cpp

@@ -3,7 +3,8 @@
  * @brief Unit tests for multiclass strategy classes
  */
 
-#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
 #include <svm_classifier/multiclass_strategy.hpp>
 #include <svm_classifier/kernel_parameters.hpp>
 #include <svm_classifier/data_converter.hpp>

tests/test_svm_classifier.cpp

@@ -3,7 +3,8 @@
  * @brief Integration tests for SVMClassifier class
  */
 
-#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
 #include <svm_classifier/svm_classifier.hpp>
 #include <torch/torch.h>
 #include <nlohmann/json.hpp>