when compiled latest chromium on andorid platform with mips64el, and occur error as follows:

../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/base/base/important_file_writer.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DSAFE_BROWSING_DB_REMOTE -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -DCR_CLANG_REVISION=\"313222-1\" -D_FILE_OFFSET_BITS=64 -DANDROID -DHAVE_SYS_UIO_H -DANDROID_NDK_VERSION_ROLL=r12b_1 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_FORTIFY_SOURCE=2 -DCOMPONENT_BUILD -D__GNU_SOURCE=1 -D__compiler_offsetof=__builtin_offsetof -Dnan=__builtin_nan -Dsnprintf=snprintf -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DBASE_IMPLEMENTATION -I../.. -Igen -Igen/base/base_jni_headers -Igen/base/base_jni_headers/base -Igen/android_runtime_jni_headers/base -I../../third_party/android_tools/ndk/sources/android/cpufeatures -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -fcolor-diagnostics -ffunction-sections -fno-short-enums -fintegrated-as --target=mips64el-linux-androideabi --target=mips64el-linux-android -march=mips64el -mcpu=mips64r6 -mmsa -mfp64 -Wall -Werror -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -Wno-enum-compare-switch -Wno-tautological-unsigned-zero-compare -fomit-frame-pointer -g2 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-auto-raw-pointer -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Wno-char-subscripts -Wexit-time-destructors -Wexit-time-destructors -O2 -fno-ident -fdata-sections -ffunction-sections -std=gnu++14 -fno-rtti -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libcxx/include -isystem../../third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++abi/libcxxabi/include -isystem../../third_party/android_tools/ndk/sources/android/support/include --sysroot=../../third_party/android_tools/ndk/platforms/android-21/arch-mips64 -fno-exceptions -fvisibility-inlines-hidden -c ../../base/files/important_file_writer.cc -o obj/base/base/important_file_writer.o
In file included from ../../base/files/important_file_writer.cc:5:
In file included from ../../base/files/important_file_writer.h:11:
In file included from ../../base/callback.h:9:
In file included from ../../base/callback_internal.h:13:
../../base/macros.h:22:9: error: '__mips64__' macro redefined [-Werror,-Wmacro-redefined]
#define __mips64__
        ^
<built-in>:360:9: note: previous definition is here
#define __mips64__ 1
        ^
1 error generated.



I'm actually testing outside of chromium, for libyuv, but the build should be similar:

gn gen out/Release "--args=is_debug=false target_os=\"android\" target_cpu=\"mips64el\" mips_arch_variant=\"r6\" mips_use_msa=true is_component_build=true is_clang=true"
ninja -v -C out/Release libyuv_unittest