[lldb] Set CMAKE_CXX_STANDARD before including LLDBStandalone
Set the C++ language standard before including LLDBStandalone.cmake.
Otherwise we risk building some of our dependencies (such as llvm_gtest)
without C++ 17 support.
This should fix the standalone bot [1] which is currently failing with the
following error:
test-port.h:841:12: error: no member named 'tuple' in namespace 'std'
using std::tuple;
[1] https://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake-standalone
diff --git a/lldb/CMakeLists.txt b/lldb/CMakeLists.txt
index 9ae67222..4a53d7e 100644
--- a/lldb/CMakeLists.txt
+++ b/lldb/CMakeLists.txt
@@ -27,11 +27,11 @@
option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
if(LLDB_BUILT_STANDALONE)
- include(LLDBStandalone)
-
set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS NO)
+
+ include(LLDBStandalone)
endif()
include(LLDBConfig)
