kc3-lang/gnulib/m4/aligned_alloc.m4

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• Hash : 99acf8c3
  Author :
  Date : 2023-01-22T14:44:44
  

  Resolve conflicts for functions introduced in Android API level 28.
  
  * m4/aligned_alloc.m4 (gl_FUNC_ALIGNED_ALLOC): Conditionally set
  REPLACE_ALIGNED_ALLOC.
  * m4/getrandom.m4 (gl_FUNC_GETRANDOM): Conditionally set
  REPLACE_GETRANDOM.
  

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• m4/aligned_alloc.m4

• # aligned_alloc.m4 serial 5
  dnl Copyright (C) 2020-2023 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  AC_DEFUN([gl_FUNC_ALIGNED_ALLOC],
  [
    AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  
    dnl Persuade glibc and OpenBSD <stdlib.h> to declare aligned_alloc().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    gl_CHECK_FUNCS_ANDROID([aligned_alloc], [[#include <stdlib.h>]])
    if test $ac_cv_func_aligned_alloc = yes; then
      dnl On macOS 11.1 and AIX 7.2, aligned_alloc returns NULL when the alignment
      dnl argument is smaller than sizeof (void *).
      AC_CACHE_CHECK([whether aligned_alloc works for small alignments],
        [gl_cv_func_aligned_alloc_works],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <stdlib.h>
              ]],
              [[return aligned_alloc (2, 18) == NULL;
              ]])
           ],
           [gl_cv_func_aligned_alloc_works=yes],
           [gl_cv_func_aligned_alloc_works=no],
           [case "$host_os" in
                       # Guess no on AIX.
              aix*)    gl_cv_func_aligned_alloc_works="guessing no" ;;
                       # Guess no on macOS.
              darwin*) gl_cv_func_aligned_alloc_works="guessing no" ;;
                       # If we don't know, obey --enable-cross-guesses.
              *)       gl_cv_func_aligned_alloc_works="$gl_cross_guess_normal" ;;
            esac
           ])
        ])
      case "$gl_cv_func_aligned_alloc_works" in
        *yes) ;;
        *) REPLACE_ALIGNED_ALLOC=1 ;;
      esac
    else
      dnl The system does not have aligned_alloc.
      HAVE_ALIGNED_ALLOC=0
      case "$gl_cv_onwards_func_aligned_alloc" in
        future*) REPLACE_ALIGNED_ALLOC=1 ;;
      esac
    fi
  ])
  

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