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-rw-r--r--compiler-rt/lib/builtins/CMakeLists.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/CMakeLists.txt b/compiler-rt/lib/builtins/CMakeLists.txt
index 0b50b5bb8d2..13158b90378 100644
--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -542,6 +542,12 @@ else ()
list(APPEND BUILTIN_CFLAGS -fomit-frame-pointer -DCOMPILER_RT_ARMHF_TARGET)
endif()
+ # For RISCV32, we must force enable int128 for compiling long
+ # double routines.
+ if("${arch}" STREQUAL "riscv32")
+ list(APPEND BUILTIN_CFLAGS -fforce-enable-int128)
+ endif()
+
add_compiler_rt_runtime(clang_rt.builtins
STATIC
ARCHS ${arch}
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