kc3-lang/libxml2/m4/ax_check_link_flag.m4

• Show log

  Commit

• Hash : d8f6e760
  Author :
  Date : 2023-04-29T19:12:23
  

  Link with --undefined-version
  
  lld 16 defaults to --no-undefined-version but the version script can
  contain symbols disabled by configuration options.
  
  See #473.
  

Download

• m4/ax_check_link_flag.m4

• # ===========================================================================
  #    https://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
  # ===========================================================================
  #
  # SYNOPSIS
  #
  #   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
  #
  # DESCRIPTION
  #
  #   Check whether the given FLAG works with the linker or gives an error.
  #   (Warnings, however, are ignored)
  #
  #   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
  #   success/failure.
  #
  #   If EXTRA-FLAGS is defined, it is added to the linker's default flags
  #   when the check is done.  The check is thus made with the flags: "LDFLAGS
  #   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
  #   issue an error when a bad flag is given.
  #
  #   INPUT gives an alternative input source to AC_LINK_IFELSE.
  #
  #   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
  #   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
  #
  # LICENSE
  #
  #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
  #   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
  #
  #   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 6
  
  AC_DEFUN([AX_CHECK_LINK_FLAG],
  [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
  AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
  AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
    ax_check_save_flags=$LDFLAGS
    LDFLAGS="$LDFLAGS $4 $1"
    AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
      [AS_VAR_SET(CACHEVAR,[yes])],
      [AS_VAR_SET(CACHEVAR,[no])])
    LDFLAGS=$ax_check_save_flags])
  AS_VAR_IF(CACHEVAR,yes,
    [m4_default([$2], :)],
    [m4_default([$3], :)])
  AS_VAR_POPDEF([CACHEVAR])dnl
  ])dnl AX_CHECK_LINK_FLAGS
  

Download