diff options
| -rw-r--r-- | lldb/cmake/modules/LLDBConfig.cmake | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lldb/cmake/modules/LLDBConfig.cmake b/lldb/cmake/modules/LLDBConfig.cmake index 8e2c01fd80b..6d457c5bec9 100644 --- a/lldb/cmake/modules/LLDBConfig.cmake +++ b/lldb/cmake/modules/LLDBConfig.cmake @@ -1,3 +1,5 @@ +include(CheckCXXSymbolExists) + set(LLDB_PROJECT_ROOT ${CMAKE_CURRENT_SOURCE_DIR}) set(LLDB_SOURCE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/source") set(LLDB_INCLUDE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/include") @@ -415,3 +417,25 @@ if (NOT LLDB_DISABLE_CURSES) list(APPEND system_libs ${CURSES_LIBRARIES}) include_directories(${CURSES_INCLUDE_DIR}) endif () + +check_cxx_symbol_exists("__GLIBCXX__" "string" LLDB_USING_LIBSTDCXX) +if(LLDB_USING_LIBSTDCXX) + # There doesn't seem to be an easy way to check the library version. Instead, we rely on the + # fact that std::set did not have the allocator constructor available until version 4.9 + check_cxx_source_compiles(" + #include <set> + std::set<int> s = std::set<int>(std::allocator<int>()); + int main() { return 0; }" + LLDB_USING_LIBSTDCXX_4_9) + if (NOT LLDB_USING_LIBSTDCXX_4_9 AND NOT LLVM_ENABLE_EH) + message(WARNING + "You appear to be linking to libstdc++ version lesser than 4.9 without exceptions " + "enabled. These versions of the library have an issue, which causes occasional " + "lldb crashes. See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59656> for " + "details. Possible courses of action are:\n" + "- use libstdc++ version 4.9 or newer\n" + "- use libc++ (via LLVM_ENABLE_LIBCXX)\n" + "- enable exceptions (via LLVM_ENABLE_EH)\n" + "- ignore this warning and accept occasional instability") + endif() +endif() |
