mirror_zfs/config/ax_save_flags.m4

# ===========================================================================
#       http://www.gnu.org/software/autoconf-archive/ax_save_flags.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_SAVE_FLAGS()
#
# DESCRIPTION
#
#   Save common compilation flags into temporary variables
#
# LICENSE
#
#   Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net>
#
#   Copying and distribution of this file, with or without modification, are
#   permitted in any medium without royalty provided the copyright notice
#   and this notice are preserved. This file is offered as-is, without any
#   warranty.

#serial 3

AC_DEFUN([AX_SAVE_FLAGS], [
  CPPFLAGS_save="${CPPFLAGS}"
  CFLAGS_save="${CFLAGS}"
  CXXFLAGS_save="${CXXFLAGS}"
  OBJCFLAGS_save="${OBJCFLAGS}"
  LDFLAGS_save="${LDFLAGS}"
  LIBS_save="${LIBS}"
])
config: better libtirpc detection Improve the autoconf code for finding libtirpc and do not assume the headers are in /usr/include/tirpc. Also remove this assumption from the `rpc/xdr.h` header in libspl and use the same `#include_next` mechanism that is used for other libspl headers. Include pkg.m4 from pkg-config in config/ for PKG_CHECK_MODULES(), the file license allows this. Include ax_save_flags.m4 and ax_restore_flags.m4 from autoconf-archive, the file licenses are compatible. Use the 2012 versions so as not rely on a more recent autoconf feature AS_VAR_COPY(), which breaks some build slaves. Add new macro library `config/find_system_library.m4` which defines the FIND_SYSTEM_LIBRARY() macro which is a convenience wrapper over using PKG_CHECK_MODULES() with a fallback to standard library locations and some sanity checks. The parameters are: ``` FIND_SYSTEM_LIBRARY(VARIABLE-PREFIX, MODULE, HEADER, HEADER-PREFIXES, LIBRARY, FUNCTIONS, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) ``` `HEADER-PREFIXES` and `FUNCTIONS` are comma-separated m4 lists. For libtirpc we are using: ``` FIND_SYSTEM_LIBRARY(LIBTIRPC, [libtirpc], [rpc/xdr.h], [tirpc], [tirpc], [xdrmem_create], [], [...]) ``` The headers are first checked for without the prefixes and then with. This system works with pkg-config and falls back on checking standard header/library locations, it can be easily overridden by the user by setting the `PREFIX_CFLAGS` and `PREFIX_LIBS` variables which are automatically added to the `./configure --help` output. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rafael Kitover <rkitover@gmail.com> Closes #7422 Closes #8313 2019-03-03 03:19:05 +03:00			`# ===========================================================================`
			`# http://www.gnu.org/software/autoconf-archive/ax_save_flags.html`
			`# ===========================================================================`
			`#`
			`# SYNOPSIS`
			`#`
			`# AX_SAVE_FLAGS()`
			`#`
			`# DESCRIPTION`
			`#`
			`# Save common compilation flags into temporary variables`
			`#`
			`# LICENSE`
			`#`
			`# Copyright (c) 2009 Filippo Giunchedi <filippo@esaurito.net>`
			`#`
			`# Copying and distribution of this file, with or without modification, are`
			`# permitted in any medium without royalty provided the copyright notice`
			`# and this notice are preserved. This file is offered as-is, without any`
			`# warranty.`

			`#serial 3`

			`AC_DEFUN([AX_SAVE_FLAGS], [`
			`CPPFLAGS_save="${CPPFLAGS}"`
			`CFLAGS_save="${CFLAGS}"`
			`CXXFLAGS_save="${CXXFLAGS}"`
			`OBJCFLAGS_save="${OBJCFLAGS}"`
			`LDFLAGS_save="${LDFLAGS}"`
			`LIBS_save="${LIBS}"`
			`])`