Fix linker error caused by private linking of transitive dependencies.

Check conan-io/conan#7192 for more information.

conanfile.py

@@ -344,10 +344,9 @@ def generate(self):
         tc.cache_variables["CELIX_ERR_BUFFER_SIZE"] = str(self.options.celix_err_buffer_size)
         # tc.cache_variables["CMAKE_PROJECT_Celix_INCLUDE"] = os.path.join(self.build_folder, "conan_paths.cmake")
         # the following is workaround for https://github.com/conan-io/conan/issues/7192
-        if self.settings.os == "Linux":
-            tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,--unresolved-symbols=ignore-in-shared-libs"
-        elif self.settings.os == "Macos":
-            tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,-undefined -Wl,dynamic_lookup"
+        for dep in self.dependencies.host.values():
+            copy(self, "*", dep.cpp_info.libdir, os.path.join(self.build_folder, "lib"))
+        tc.cache_variables["CMAKE_BUILD_RPATH"] = os.path.join(self.build_folder, "lib")
         v = Version(self.version)
         tc.cache_variables["CELIX_MAJOR"] = str(v.major.value)
         tc.cache_variables["CELIX_MINOR"] = str(v.minor.value)

examples/conan_test_package/conanfile.py

@@ -24,6 +24,9 @@ class TestPackageConan(ConanFile):
     generators = "cmake_paths", "cmake_find_package"
     # requires = "celix/2.3.0@docker/test"
 
+    def imports(self):
+        self.copy("*", src="@libdirs", dst="lib")
+
     def build(self):
         cmake = CMake(self)
         cmake.definitions["TEST_FRAMEWORK"] = self.options["celix"].build_framework
@@ -56,10 +59,7 @@ def build(self):
         cmake.definitions["TEST_COMPONENTS_READY_CHECK"] = self.options["celix"].build_components_ready_check
         cmake.definitions["CMAKE_PROJECT_test_package_INCLUDE"] = os.path.join(self.build_folder, "conan_paths.cmake")
         # the following is workaround https://github.com/conan-io/conan/issues/7192
-        if self.settings.os == "Linux":
-            cmake.definitions["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,--unresolved-symbols=ignore-in-shared-libs"
-        elif self.settings.os == "Macos":
-            cmake.definitions["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,-undefined -Wl,dynamic_lookup"
+        cmake.definitions["CMAKE_BUILD_RPATH"] = os.path.join(self.build_folder, "lib")
         cmake.configure()
         cmake.build()
 

examples/conan_test_package_v2/conanfile.py

@@ -19,6 +19,7 @@
 from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
 from conan.tools.build import can_run
 from conan.tools.files import chdir
+from conan.tools.files import copy
 import os
 
 
@@ -65,10 +66,9 @@ def generate(self):
         tc.cache_variables["TEST_UTILS"] = celix_options.build_utils
         tc.cache_variables["TEST_COMPONENTS_READY_CHECK"] = celix_options.build_components_ready_check
         # the following is workaround https://github.com/conan-io/conan/issues/7192
-        if self.settings.os == "Linux":
-            tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,--unresolved-symbols=ignore-in-shared-libs"
-        elif self.settings.os == "Macos":
-            tc.cache_variables["CMAKE_EXE_LINKER_FLAGS"] = "-Wl,-undefined -Wl,dynamic_lookup"
+        for dep in self.dependencies.host.values():
+            copy(self, "*", dep.cpp_info.libdir, os.path.join(self.build_folder, "lib"))
+        tc.cache_variables["CMAKE_BUILD_RPATH"] = os.path.join(self.build_folder, "lib")
         tc.user_presets_path = False
         tc.generate()