Go项目交叉编译ARMv6失败，树莓派Zero W运行报非法指令

我正尝试为ARMv6l架构交叉编译Go程序，目标是在树莓派Zero W上运行。树莓派Zero W的CPU信息如下：

$ cat /proc/cpuinfo
processor   : 0
model name  : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS    : 697.95
Features    : half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part    : 0xb76
CPU revision    : 7

Hardware    : BCM2835
Revision    : 9000c1
Serial      : 0000000059e0c5a9
Model       : Raspberry Pi Zero W Rev 1.1

我执行了如下命令进行交叉编译：

env CC=arm-linux-gnueabihf-gcc CGO_ENABLED=1 GOOS=linux GOARM=6 GOARCH=arm go build -o build/dht_sensor_exporter-$(VERSION)-linux-armv6 ./cmd/main.go

执行file dht_sensor_exporter-$(VERSION)-linux-armv6查看结果显示正常：

dht_sensor_exporter-$(VERSION)-linux-armv6: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, BuildID[sha1]=d84b6c4b0dc4b77b9c65db7bc30823e5dbe1078c, for GNU/Linux 3.2.0, with debug_info, not stripped

但在树莓派Zero W上运行时提示Illegal instruction。经排查，发现交叉编译生成的文件并非对应正确架构，执行如下命令查看：

$ readelf -A dht_sensor_exporter
Attribute Section: aeabi
File Attributes
  Tag_CPU_name: "7-A"
  Tag_CPU_arch: v7
  Tag_CPU_arch_profile: Application
  Tag_ARM_ISA_use: Yes
  Tag_THUMB_ISA_use: Thumb-2
  Tag_FP_arch: VFPv3-D16
  Tag_ABI_PCS_wchar_t: 4
  Tag_ABI_FP_rounding: Needed
  Tag_ABI_FP_denormal: Needed
  Tag_ABI_FP_exceptions: Needed
  Tag_ABI_FP_number_model: IEEE 754
  Tag_ABI_align_needed: 8-byte
  Tag_ABI_enum_size: int
  Tag_ABI_VFP_args: VFP registers
  Tag_CPU_unaligned_access: v6

从Tag_CPU_arch可见实际编译为ARMv7架构。该程序基于GitHub Actions在最新Ubuntu版本构建，我怀疑是在C/C++编译器（arm-linux-gnueabihf-gcc）的使用上存在错误，恳请帮助。

内容的提问来源于stack exchange，提问作者vernak2539