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config: Add warning if ARCH environment variable is set

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If ARCH environment variable is set it can cause the failure of the
kernel modules check during the configure step. The resulting error
will be confusing, and may looks like this:

>    checking for kernel config option compatibility... done
>    checking whether CONFIG_MODULES is defined... no
>    configure: error:
>        *** This kernel does not include the required loadable module
>        *** support!

Detect when ARCH is print a warning.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Maksym Shkolnyi <maksym.shkolnyi@workato.com>
Closes #17680
This commit is contained in:
Maksym Shkolnyi 2025-09-03 20:24:17 +02:00 committed by Brian Behlendorf
parent 56e8ab4a3e
commit 886f29e1f6
2 changed files with 18 additions and 0 deletions
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17
config/always-arch.m4
View File

@ -39,3 +39,20 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_ARCH], [
AM_CONDITIONAL([TARGET_CPU_SPARC64], test $TARGET_CPU = sparc64)
AM_CONDITIONAL([TARGET_CPU_ARM], test $TARGET_CPU = arm)
])
dnl #
dnl # Check for conflicting environment variables
dnl #
dnl # If ARCH env variable is set up, then kernel Makefile in the /usr/src/kernel
dnl # can misbehave during the zfs ./configure test of the module compilation.
AC_DEFUN([ZFS_AC_CONFIG_CHECK_ARCH_VAR], [
AC_MSG_CHECKING([for conflicting environment variables])
if test -n "$ARCH"; then
AC_MSG_RESULT([warning])
AC_MSG_WARN(m4_normalize([ARCH environment variable is set to "$ARCH".
This can cause build kernel modules support check failure.
Please unset it.]))
else
AC_MSG_RESULT([done])
fi
])

1
config/zfs-build.m4
View File

@ -266,6 +266,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD
ZFS_AC_CONFIG_ALWAYS_SYSTEM
ZFS_AC_CONFIG_ALWAYS_ARCH
ZFS_AC_CONFIG_CHECK_ARCH_VAR
ZFS_AC_CONFIG_ALWAYS_PYTHON
ZFS_AC_CONFIG_ALWAYS_PYZFS
ZFS_AC_CONFIG_ALWAYS_SED