zturner added a comment.
Ok the issue is that you cant use CMake generator expressions in this way.
This should work though:
if (TARGET clang)
set(LLDB_DEFAULT_TEST_COMPILER
"${LLVM_BINARY_DIR}/clang${CMAKE_EXECUTABLE_SUFFIX}")
else()
set(LLDB_DEFAULT_TEST_COMPILER "")
endif()
set(LLDB_TEST_COMPILER "${LLDB_DEFAULT_TEST_COMPILER}" CACHE PATH "Compiler
to use for building LLDB test inferiors")
if ("${LLDB_TEST_COMPILER}" STREQUAL "")
message(FATAL_ERROR "LLDB test compiler not specified. Tests will not run")
endif()
I think you might be able to do something like:
if (TARGET clang)
get_property(LLDB_DEFAULT_TEST_COMPILER TARGET clang PROPERTY LOCATION)
endif()
as well, but I haven't tried.
https://reviews.llvm.org/D39215
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