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# serial 1
# Copyright © 2023 Guillem Jover <guillem@debian.org>
# DPKG_CHECK_HEADER_SYS_PROCFS
# ----------------------------
# Check for the <sys/procfs.h> header.
AC_DEFUN([DPKG_CHECK_HEADER_SYS_PROCFS], [
# On at least Solaris <= 11.3 we cannot use the new structured procfs API
# while also using LFS, so we need to check whether including <sys/procfs.h>
# is usable, and otherwise undefine _FILE_OFFSET_BITS, but only for the
# code using this (that is s-s-d).
dpkg_structured_procfs_supports_lfs=1
AC_CHECK_HEADERS([sys/procfs.h], [], [
# We need to reset the cached value, otherwise we will not be able to
# check it again.
AS_UNSET([ac_cv_header_sys_procfs_h])
# If a bare include failed, check whether we need to disable LFS to be
# able to use structured procfs.
AC_CHECK_HEADERS([sys/procfs.h], [
dpkg_structured_procfs_supports_lfs=0
], [], [[
#undef _FILE_OFFSET_BITS
#define _STRUCTURED_PROC 1
]])
], [[
#define _STRUCTURED_PROC 1
]])
AC_DEFINE_UNQUOTED([DPKG_STRUCTURED_PROCFS_SUPPORTS_LFS],
[$dpkg_structured_procfs_supports_lfs],
[Whether structured procfs supports LFS])
])# DPKG_CHECK_HEADER_SYS_PROCFS
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