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<p class="MsoNormal">Hi Petr, I’ve added you to this question directly as it seems you’re the one that last touched it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m currently having trouble working with llvm/runtimes with regards to LLVM_RUNTIME_MULTILIBS where I have some pseudo-cmake in my cache that looks like:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">foreach (target in ${RUNTIME_TARGETS})<o:p></o:p></p>
<p class="MsoNormal"> set(RUNTIMES_${target}_LIBCXX_ENABLE_EXCEPTIONS OFF CACHE BOOL "")<o:p></o:p></p>
<p class="MsoNormal"> set(RUNTIMES_${target}+except_LIBCXX_ENABLE_EXCEPTIONS ON CACHE BOOL "")<o:p></o:p></p>
<p class="MsoNormal">endforeach()<o:p></o:p></p>
<p class="MsoNormal">set(LLVM_RUNTIME_MULTILIBS "except" CACHE STRING "")<o:p></o:p></p>
<p class="MsoNormal">set(LLVM_RUNTIME_MULTILIB_except_TARGETS "${RUNTIME_TARGETS}" CACHE STRING "")<o:p></o:p></p>
<p class="MsoNormal">set(LLVM_RUNTIME_TARGETS "${RUNTIME_TARGETS}" CACHE STRING "")<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m finding that the ‘+except’ case has LIBCXX_ENABLE_EXCEPTIONS OFF. I’ve tracked it down to how variables are passed to the subproject:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In llvm/runtimes/CMakeLists.txt, there’s a loop:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> get_cmake_property(variableNames VARIABLES)<o:p></o:p></p>
<p class="MsoNormal"> foreach(variableName ${variableNames})<o:p></o:p></p>
<p class="MsoNormal"> string(FIND "${variableName}" "RUNTIMES_${name}_" out)<o:p></o:p></p>
<p class="MsoNormal"> if("${out}" EQUAL 0)<o:p></o:p></p>
<p class="MsoNormal"> string(REPLACE "RUNTIMES_${name}_" "" new_name ${variableName})<o:p></o:p></p>
<p class="MsoNormal"> list(APPEND ${name}_extra_args "-D${new_name}=${${variableName}}")<o:p></o:p></p>
<p class="MsoNormal"> endif()<o:p></o:p></p>
<p class="MsoNormal"> string(FIND "${variableName}" "RUNTIMES_${target}_" out)<o:p></o:p></p>
<p class="MsoNormal"> if("${out}" EQUAL 0)<o:p></o:p></p>
<p class="MsoNormal"> string(REPLACE "RUNTIMES_${target}_" "" new_name ${variableName})<o:p></o:p></p>
<p class="MsoNormal"> list(APPEND ${name}_extra_args "-D${new_name}=${${variableName}}")<o:p></o:p></p>
<p class="MsoNormal"> endif()<o:p></o:p></p>
<p class="MsoNormal"> endforeach()<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This loop preferences variable order in the cmake cache. In my case, the RUNTIMES_${target}_LIBCXX_ENABLE_EXCEPTIONS variables all appear in the cache after the RUNTIMES_${target}+except_LIBCXX_ENABLE_EXCEPTIONS variables, and the former
takes precedence. Is this expected behavior and I’m doing something incorrectly, or should this loop preference specific overrides (+except) over less specific overrides?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">JB<o:p></o:p></p>
<p class="MsoNormal">Code Generation<o:p></o:p></p>
<p class="MsoNormal">Texas Instruments<o:p></o:p></p>
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