How to set up tests in a Makefile (https://github.com/KRMisha/Makefile) using Catch2 with Conan

.gitignore.patch

diff --git a/.gitignore b/.gitignore
index 542fa54..2a5e664 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,9 @@
 .DS_Store
 Thumbs.db
 
+# Python virtual environment for Conan
+.venv/
+
 # Build output
 /build/
 

conanfile.txt

[requires]
catch2/3.7.1

[generators]
MakeDeps

foo.cpp

// src/foo.cpp

#include "foo.h"

int foo()
{
    return 5;
}

foo.h

// src/foo.h

#pragma once

int foo();

Makefile.patch

diff --git a/Makefile b/Makefile
index ae5c329..536142b 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ TEST_SRCS := $(sort $(shell find $(TEST_DIR) -name '*.cpp' 2> /dev/null))
 # Includes
 INCLUDE_DIR =
 INCLUDES = $(addprefix -I,$(SRC_DIR) $(INCLUDE_DIR))
-TEST_INCLUDES = -I$(TEST_DIR)
+TEST_INCLUDES = -I$(TEST_DIR) $(CONAN_INCLUDE_DIRS_CATCH2)
 
 # C preprocessor settings
 CPPFLAGS = $(INCLUDES) -MMD -MP
@@ -38,11 +38,11 @@ WARNINGS = -Wall -Wpedantic -Wextra
 
 # Linker flags
 LDFLAGS =
-TEST_LDFLAGS =
+TEST_LDFLAGS = $(CONAN_LIB_DIRS_CATCH2)
 
 # Libraries to link
 LDLIBS =
-TEST_LDLIBS =
+TEST_LDLIBS = $(CONAN_LIBS_CATCH2_CATCH2_WITH_MAIN) $(CONAN_LIBS_CATCH2__CATCH2) $(CONAN_SYSTEM_LIBS_CATCH2)
 
 # Target OS detection
 ifeq ($(OS),Windows_NT) # OS is a preexisting environment variable on Windows
@@ -103,9 +103,21 @@ else
        CXXFLAGS += -O0 -g
 endif
 
-# Object and bin directories
+# Object, bin, and Conan directories
 OBJ_DIR := $(BUILD_DIR)/obj
 BIN_DIR := $(BUILD_DIR)/bin
+CONAN_DIR := $(BUILD_DIR)/conan
+
+# Conan
+ifneq ($(MAKECMDGOALS),clean)
+	CONAN_DEFINE_FLAG = -D
+	CONAN_INCLUDE_DIR_FLAG = -isystem
+	CONAN_LIB_DIR_FLAG = -L
+	CONAN_BIN_DIR_FLAG = -L
+	CONAN_LIB_FLAG = -l
+	CONAN_SYSTEM_LIB_FLAG = -l
+	include $(CONAN_DIR)/conandeps.mk
+endif
 
 # Object files
 MAIN_SRC = $(SRC_DIR)/main.cpp
@@ -134,6 +146,12 @@ FILES := $(shell find $(SRC_DIR) $(TEST_DIR) $(INCLUDE_DIR) -name '*.cpp' -o -na
 .PHONY: all
 all: $(BIN_DIR)/$(EXEC) $(if $(TEST_SRCS),$(BIN_DIR)/$(TEST_EXEC))
 
+# Generate Conan dependencies
+$(CONAN_DIR)/conandeps.mk: conanfile.txt
+	@echo "Generating: $@"
+	@mkdir -p $(@D)
+	@conan install . --output-folder=$(CONAN_DIR) --build=missing
+
 # Build executable
 $(BIN_DIR)/$(EXEC): $(MAIN_OBJ) $(SRC_OBJS_WITHOUT_MAIN)
        @echo "Building executable: $@"

test_foo.cpp

// tests/test_foo.cpp

#include <catch2/catch_test_macros.hpp>
#include "foo.h"

TEST_CASE("foo() returns 5", "[foo]")
{
    REQUIRE(foo() == 5);
}