[boringssl] arm cross compilation issue

[jwinarske]

arm cross compilation issue

| FAILED: obj/third_party/boringssl/boringssl/cpu_arm_linux.o
| ../../third_party/llvm-build/Release+Asserts/bin/clang -MD -MF obj/third_party/boringssl/boringssl/cpu_arm_linux.o.d -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_OZONE=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -DCR_CLANG_REVISION=\"llvmorg-19-init-8091-gab037c4f-1\" -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DCR_LIBCXX_REVISION=e3b94d0e5b86883fd77696bf10dc33ba250ba99b -DCR_SYSROOT_KEY=20230611T210420Z-2 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DBORINGSSL_IMPLEMENTATION -DBORINGSSL_ALLOW_CXX_RUNTIME -DBORINGSSL_NO_STATIC_INITIALIZER -DOPENSSL_SMALL -I../.. -Igen -I../../buildtools/third_party/libc++ -I../../third_party/boringssl/src/include -fno-delete-null-pointer-checks -fno-ident -fno-strict-aliasing -fstack-protector -funwind-tables -fPIC -pthread -fcolor-diagnostics -fmerge-all-constants -fcrash-diagnostics-dir=../../tools/clang/crashreports -mllvm -instcombine-lower-dbg-declare=0 -mllvm -split-threshold-for-reg-with-hint=0 -ffp-contract=off -fcomplete-member-pointers --target=arm-linux-gnueabihf -march=armv7-a -mfloat-abi=hard -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -ffile-compilation-dir=. -no-canonical-prefixes -mfpu=neon -mthumb -ftrivial-auto-var-init=pattern -fno-omit-frame-pointer -g0 -fvisibility=hidden -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang raw-ref-template-as-trivial-member -Xclang -plugin-arg-find-bad-constructs -Xclang check-stack-allocated -Xclang -plugin-arg-find-bad-constructs -Xclang check-allow-auto-typedefs-better-nested -Xclang -plugin-arg-find-bad-constructs -Xclang check-raw-ptr-to-stack-allocated -Xclang -plugin-arg-find-bad-constructs -Xclang disable-check-raw-ptr-to-stack-allocated-error -Xclang -plugin-arg-find-bad-constructs -Xclang raw-ptr-exclude-path=/third_party/dawn/ -Xclang -plugin-arg-find-bad-constructs -Xclang check-ipc -Wall -Wno-unused-variable -Wno-c++11-narrowing -Wno-unused-but-set-variable -Wno-misleading-indentation -Wno-missing-field-initializers -Wno-unused-parameter -Wno-psabi -Wloop-analysis -Wno-unneeded-internal-declaration -Wno-cast-function-type -Wno-ignored-pragma-optimize -Wno-deprecated-builtins -Wno-bitfield-constant-conversion -Wno-deprecated-this-capture -Wno-invalid-offsetof -Wno-vla-extension -Wno-thread-safety-reference-return -Werror -O2 -fdata-sections -ffunction-sections -fno-unique-section-names -fno-math-errno -std=c11 --sysroot=../../../../recipe-sysroot -c ../../third_party/boringssl/src/crypto/cpu_arm_linux.c -o obj/third_party/boringssl/boringssl/cpu_arm_linux.o
| In file included from ../../third_party/boringssl/src/crypto/cpu_arm_linux.c:28:
| ../../third_party/boringssl/src/crypto/cpu_arm_linux.h:36:9: error: 'HWCAP2_AES' macro redefined [-Werror,-Wmacro-redefined]
|    36 | #define HWCAP2_AES (1 << 0)
|       |         ^
| ../../../../recipe-sysroot/usr/include/bits/hwcap-32.h:53:9: note: previous definition is here
|    53 | #define HWCAP2_AES              1
|       |         ^
| In file included from ../../third_party/boringssl/src/crypto/cpu_arm_linux.c:28:
| ../../third_party/boringssl/src/crypto/cpu_arm_linux.h:37:9: error: 'HWCAP2_PMULL' macro redefined [-Werror,-Wmacro-redefined]
|    37 | #define HWCAP2_PMULL (1 << 1)
|       |         ^
| ../../../../recipe-sysroot/usr/include/bits/hwcap-32.h:54:9: note: previous definition is here
|    54 | #define HWCAP2_PMULL            2
|       |         ^
| In file included from ../../third_party/boringssl/src/crypto/cpu_arm_linux.c:28:
| ../../third_party/boringssl/src/crypto/cpu_arm_linux.h:38:9: error: 'HWCAP2_SHA1' macro redefined [-Werror,-Wmacro-redefined]
|    38 | #define HWCAP2_SHA1 (1 << 2)
|       |         ^
| ../../../../recipe-sysroot/usr/include/bits/hwcap-32.h:55:9: note: previous definition is here
|    55 | #define HWCAP2_SHA1             4
|       |         ^
| In file included from ../../third_party/boringssl/src/crypto/cpu_arm_linux.c:28:
| ../../third_party/boringssl/src/crypto/cpu_arm_linux.h:39:9: error: 'HWCAP2_SHA2' macro redefined [-Werror,-Wmacro-redefined]
|    39 | #define HWCAP2_SHA2 (1 << 3)
|       |         ^
| ../../../../recipe-sysroot/usr/include/bits/hwcap-32.h:56:9: note: previous definition is here
|    56 | #define HWCAP2_SHA2             8
|       |         ^
| 4 errors generated.

[cloudwebrtc]

This may require a patch for boringssl to skip the duplicate macro definitions

#ifndef HWCAP2_AES
#define HWCAP2_AES (1 << 0)
#endif