[2.1.3] no "target_cpu" during configure on Arch Linux / Raspberry Pi 4

[UweSauter]

System information

Type	Version/Name
Distribution Name	Arch Linux (ARM)
Distribution Version	Rolling Update
Kernel Version	5.15.27-1-rpi-ARCH
Architecture	armv7l (Raspberry Pi 4)
OpenZFS Version	2.1.3

Describe the problem you're observing

During ./configure I see

[…]
checking whether gcc supports -fno-omit-frame-pointer... yes
checking whether gcc supports -fno-ipa-sra... yes
checking whether to build with -fsanitize=address support... no
checking for system type (linux-gnueabihf)... Linux
./configure: line 16696: test: =: unary operator expected
./configure: line 16704: test: =: unary operator expected
./configure: line 16712: test: =: unary operator expected
./configure: line 16720: test: =: unary operator expected
./configure: line 16728: test: =: unary operator expected
checking for python version... 
checking for python platform... 
checking for python script directory... 
[…]

which relates to

        case $target_cpu in
        i?86)
                TARGET_CPU=i386
                ;;
        amd64|x86_64)
                TARGET_CPU=x86_64
                ;;
        powerpc*)
                TARGET_CPU=powerpc
                ;;
        aarch64*)
                TARGET_CPU=aarch64
                ;;
        sparc64)
                TARGET_CPU=sparc64
                ;;
        esac
        
         if test $TARGET_CPU = i386; then
  TARGET_CPU_I386_TRUE=
  TARGET_CPU_I386_FALSE='#'
else
  TARGET_CPU_I386_TRUE='#'
  TARGET_CPU_I386_FALSE=
fi

         if test $TARGET_CPU = x86_64; then
  TARGET_CPU_X86_64_TRUE=
  TARGET_CPU_X86_64_FALSE='#'
else
  TARGET_CPU_X86_64_TRUE='#'
  TARGET_CPU_X86_64_FALSE=
fi

         if test $TARGET_CPU = powerpc; then
  TARGET_CPU_POWERPC_TRUE=
  TARGET_CPU_POWERPC_FALSE='#'
else
  TARGET_CPU_POWERPC_TRUE='#'
  TARGET_CPU_POWERPC_FALSE=
fi

         if test $TARGET_CPU = aarch64; then
  TARGET_CPU_AARCH64_TRUE=
  TARGET_CPU_AARCH64_FALSE='#'
else
  TARGET_CPU_AARCH64_TRUE='#'
  TARGET_CPU_AARCH64_FALSE=
fi

         if test $TARGET_CPU = sparc64; then
  TARGET_CPU_SPARC64_TRUE=
  TARGET_CPU_SPARC64_FALSE='#'
else
  TARGET_CPU_SPARC64_TRUE='#'
  TARGET_CPU_SPARC64_FALSE=
fi

in ./configure script.

Possibly the automated build script doesn't call ./configure correctly. But lscpu gives

# lscpu
Architecture:           armv7l
  Byte Order:           Little Endian
CPU(s):                 4
  On-line CPU(s) list:  0-3
Vendor ID:              ARM
  Model name:           Cortex-A72
    Model:              3
    Thread(s) per core: 1
    Core(s) per socket: 4
    Socket(s):          1
    Stepping:           r0p3
    CPU max MHz:        1800.0000
    CPU min MHz:        600.0000
    BogoMIPS:           216.00
    Flags:              half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32

and armv7l is not listed in that selection.

Edit: BTW I'm using Arch Linux AUR's zfs-utils build script.

[nabijaczleweli]

Just for reference, if you add echo $target_cpu (possibly > /tmp/tc) before the case $target_cpu in stanza – do you get armv7l?

[UweSauter]

I applied this patch on ./configure:

--- configure   2022-03-10 22:47:53.121408247 +0100
+++ configure   2022-03-12 17:23:06.547460462 +0100
@@ -16671,7 +16671,11 @@
   BUILD_FREEBSD_FALSE=
 fi
 
-
+if [ -n "$target_cpu" ]; then
+  echo "target_cpu=$target_cpu" | tee >/tmp/target_cpu
+else
+  echo "target_cpu not set" | tee >/tmp/target_cpu
+fi
 
        case $target_cpu in
        i?86)

The result is:

$ cat /tmp/target_cpu 
target_cpu=armv7l

[nabijaczleweli]

These are harmless, but if you wanna try #13225, it eliminates them.