Failed to build Dart SDK for arm with error: "cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU"

[falrom]

I have tried multiple times to delete the out directory and execute the command gclient sync -D, but always encounter the same error when compiling third_party/boringssl.

Referenced these two instructional documents:

• https://github.com/dart-lang/sdk/wiki/Building#source
• https://github.com/dart-lang/sdk/wiki/Building-Dart-SDK-for-ARM-or-RISC-V

My PC (Ubuntu 22):

$ uname -a

Linux ?????? 6.5.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr  4 14:39:20 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

GCC Version (Got from apt):

$ arm-linux-gnueabihf-gcc -v

Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/11/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.4.0-1ubuntu1~22.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --without-target-system-zlib --enable-multiarch --disable-sjlj-exceptions --with-arch=armv7-a+fp --with-float=hard --with-mode=thumb --disable-werror --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf- --includedir=/usr/arm-linux-gnueabihf/include --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)

SDK source:

$ git status

HEAD is at 3.3.4
nothing to commit, clean working directory

Build error:

$ ./tools/build.py --no-rbe --no-clang --mode release --arch arm create_sdk

Done. Made 476 targets from 120 files in 211ms
buildtools/ninja/ninja -C out/ReleaseXARM create_sdk
ninja: Entering directory `out/ReleaseXARM'
[636/5259] ASM obj/third_party/boringssl/linux-arm/crypto/chacha/boringssl_asm.chacha-armv4-linux.o
FAILED: obj/third_party/boringssl/linux-arm/crypto/chacha/boringssl_asm.chacha-armv4-linux.o 
arm-linux-gnueabihf-gcc -MMD -MF obj/third_party/boringssl/linux-arm/crypto/chacha/boringssl_asm.chacha-armv4-linux.o.d -D_FORTIFY_SOURCE=2 -DNDEBUG -I../../third_party/boringssl/src/include -I../.. -Igen -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -fno-tree-sra -fno-caller-saves -fPIE -mthumb -c ../../third_party/boringssl/linux-arm/crypto/chacha/chacha-armv4-linux.S -o obj/third_party/boringssl/linux-arm/crypto/chacha/boringssl_asm.chacha-armv4-linux.o
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
[649/5259] ACTION //runtime/vm:vm_platform_product(//build/toolchain/linux:arm)
ninja: build stopped: subcommand failed.
BUILD FAILED