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a3588c68f7
Kernel commits
39f75da7bcc8 ("isystem: trim/fixup stdarg.h and other headers")
c0891ac15f04 ("isystem: ship and use stdarg.h")
564f963eabd1 ("isystem: delete global -isystem compile option")
(for now can be found in linux-next.git tree, will land into the
Linus' tree during the ongoing 5.15 cycle with one of akpm merges)
removed the -isystem flag and disallowed the inclusion of any
compiler header files. They also introduced a minimal
<linux/stdarg.h> as a replacement for <stdarg.h>.
include/os/linux/spl/sys/cmn_err.h in the ZFS source tree includes
<stdarg.h> unconditionally. Introduce a test for <linux/stdarg.h>
and include it instead of the compiler's one to prevent module
build breakage.
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Closes #12531
33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
dnl #
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dnl # Linux 5.15 gets rid of -isystem and external <stdarg.h> inclusion
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dnl # and ships its own <linux/stdarg.h>. Check if this header file does
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dnl # exist and provide all necessary definitions for variable argument
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dnl # functions. Adjust the inclusion of <stdarg.h> according to the
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dnl # results.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_STANDALONE_LINUX_STDARG], [
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ZFS_LINUX_TEST_SRC([has_standalone_linux_stdarg], [
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#include <linux/stdarg.h>
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#if !defined(va_start) || !defined(va_end) || \
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!defined(va_arg) || !defined(va_copy)
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#error "<linux/stdarg.h> is invalid"
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#endif
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_STANDALONE_LINUX_STDARG], [
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dnl #
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dnl # Linux 5.15 ships its own stdarg.h and doesn't allow to
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dnl # include compiler headers.
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dnl #
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AC_MSG_CHECKING([whether standalone <linux/stdarg.h> exists])
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ZFS_LINUX_TEST_RESULT([has_standalone_linux_stdarg], [
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_STANDALONE_LINUX_STDARG, 1,
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[standalone <linux/stdarg.h> exists])
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],[
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AC_MSG_RESULT([no])
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])
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])
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