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build: workaround cross-compilation for Windows #19747

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Merged
merged 1 commit into from
Oct 6, 2018
Merged

build: workaround cross-compilation for Windows #19747

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7 changes: 7 additions & 0 deletions cmake/modules/AddSwift.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -273,6 +273,13 @@ function(_add_variant_c_compile_flags)
# RTTI as well. This requires a newer SDK though and we do not have
# guarantees on the SDK version currently.
list(APPEND result "-D_HAS_STATIC_RTTI=0")

# NOTE(compnerd) workaround LLVM invoking `add_definitions(-D_DEBUG)` which
# causes failures for the runtime library when cross-compiling due to
# undefined symbols from the standard library.
if(NOT CMAKE_BUILD_TYPE STREQUAL Debug)
list(APPEND result "-U_DEBUG")
endif()
endif()

if(CFLAGS_ENABLE_ASSERTIONS)
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