petalinux build 出现qemu问题

主要表现如下：build的时候出现error，开头是qemu

ERROR: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: gitsm: submodule download failed: FetchError Fetcher failure for URL: 'gitsm://boringssl.googlesource.com/boringssl;protocol=https;name=boringssl;subpath=boringssl;bareclone=1;nobranch=1'. Unable to fetch URL from any source.
WARNING: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: Failed to fetch URL gitsm://github.com/openssl/openssl;protocol=https;name=CryptoPkg/Library/OpensslLib/openssl;subpath=CryptoPkg/Library/OpensslLib/openssl;bareclone=1;nobranch=1, attempting MIRRORS if available
ERROR: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: Fetcher failure for URL: 'gitsm://boringssl.googlesource.com/boringssl;protocol=https;name=boringssl;subpath=boringssl;bareclone=1;nobranch=1'. Unable to fetch URL from any source.
ERROR: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: gitsm: submodule download failed: FetchError Fetcher failure for URL: 'gitsm://github.com/openssl/openssl;protocol=https;name=CryptoPkg/Library/OpensslLib/openssl;subpath=CryptoPkg/Library/OpensslLib/openssl;bareclone=1;nobranch=1'. Unable to fetch URL from any source.
WARNING: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: Failed to fetch URL gitsm://git.qemu.org/git/edk2.git;protocol=https;name=roms/edk2;subpath=roms/edk2;bareclone=1;nobranch=1, attempting MIRRORS if available
ERROR: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: Fetcher failure for URL: 'gitsm://github.com/openssl/openssl;protocol=https;name=CryptoPkg/Library/OpensslLib/openssl;subpath=CryptoPkg/Library/OpensslLib/openssl;bareclone=1;nobranch=1'. Unable to fetch URL from any source.
ERROR: qemu-xilinx-native-v5.1.0-xilinx-v2020.2+gitAUTOINC+7e3e3ae09a-r0 do_fetch: gitsm: submodule download failed: FetchError Fetcher failure for URL: 'gitsm://git.qemu.org/git/edk2.git;protocol=https;name=roms/edk2;subpath=roms/edk2;bareclone=1;nobranch=1'. Unable to fetch URL from any source.

都是qemu打头，且报错 Fetcher failure for URL: 'gitsm://github.com/…

在你工程文件夹内找到……/components/yocto/layers/meta-xilinx/meta-xilinx-bsp/recipes-devtools/qemu 这个文件夹

打开“qemu-xilinx.inc”

把 REPO ?= “gitsm: //github.com/Xilinx/qemu.git;protocol=https” 里面的gitsm改成git，
保存，再build，问题解决。