Re: libobjc2 on OpenBSD 6.8 build errors - C++ runtime not found

[Frederik Seiffert]

Hi Riccardo,

Am 02.02.2021 um 15:22 schrieb Riccardo Mottola <riccardo.mottola@libero.it>:

-- No useable C++ runtime found


why doesn't it like my runtime library?

The crude way I’ve been debugging the C++ runtime detection (in my Android/Windows endeavors) was by logging the output from try_compile() with this change in CMakeLists:

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -234,7 +234,9 @@ function(test_cxx CXX_RUNTIME_NAME IS_STDLIB)

                        "${CMAKE_BINARY_DIR}/CMake"

                        "${CMAKE_CURRENT_LIST_DIR}/CMake"

                        test_cxx_runtime

-                       CMAKE_FLAGS "-DCXX_RUNTIME=${CXX_RUNTIME_LIB}" ${CXX_RUNTIME_FLAGS})

+                       CMAKE_FLAGS "-DCXX_RUNTIME=${CXX_RUNTIME_LIB}" ${CXX_RUNTIME_FLAGS}

+                       OUTPUT_VARIABLE TRY_COMPILE_OUTPUT)

+               message(WARNING ${TRY_COMPILE_OUTPUT})

                if (USERUNTIME)

                        set(CXX_RUNTIME ${CXX_RUNTIME_LIB} PARENT_SCOPE)

                else ()

This will show you the compiler/linker invocation for the test program and any errors. Maybe that helps.

Frederik