kc3-lang/gnulib/m4/gl-openssl.m4

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• m4/gl-openssl.m4

• # gl-openssl.m4 serial 6
  dnl Copyright (C) 2013-2023 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_SET_CRYPTO_CHECK_DEFAULT],
  [
    m4_define([gl_CRYPTO_CHECK_DEFAULT], [$1])
  ])
  gl_SET_CRYPTO_CHECK_DEFAULT([no])
  
  AC_DEFUN([gl_CRYPTO_CHECK],
  [
    dnl gnulib users set this before gl_INIT with gl_SET_CRYPTO_CHECK_DEFAULT()
    m4_divert_once([DEFAULTS], [with_openssl_default='gl_CRYPTO_CHECK_DEFAULT'])
  
    dnl Only clear once, so crypto routines can be checked for individually
    m4_divert_once([DEFAULTS], [LIB_CRYPTO=])
  
    AC_ARG_WITH([openssl],
      [[  --with-openssl[=ARG]    use libcrypto hash routines for the hash functions
                            MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512.
                            Valid ARGs are:
                              'yes',
                              'no',
                              'auto' => use if any version available,
                              'auto-gpl-compat' => use if GPL compatible version
                                                   available,
                              'optional' => use if available
                                            and warn if not available;
                            Default is ']gl_CRYPTO_CHECK_DEFAULT['.]m4_ifdef([gl_AF_ALG], [
                            Note also --with-linux-crypto, which will enable the
                            use of Linux kernel crypto routines (if available),
                            which has precedence for files.])],
      [],
      [with_openssl=$with_openssl_default])
  
    AC_SUBST([LIB_CRYPTO])
    if test "x$with_openssl" != xno; then
      if test "x$with_openssl" = xauto-gpl-compat; then
        AC_CACHE_CHECK([whether openssl is GPL compatible],
                       [gl_cv_openssl_gpl_compat],
          [AC_COMPILE_IFELSE(
             [AC_LANG_PROGRAM([[
                  #include <openssl/opensslv.h>
                  #if OPENSSL_VERSION_MAJOR < 3
                    #error "openssl >= version 3 not found"
                  #endif
                ]])],
             [gl_cv_openssl_gpl_compat=yes],
             [gl_cv_openssl_gpl_compat=no])])
      fi
      if test "x$with_openssl" != xauto-gpl-compat ||
         test "x$gl_cv_openssl_gpl_compat" = xyes; then
        AC_CHECK_LIB([crypto], [$1],
          [AC_CHECK_HEADERS(
             m4_if([$1], [MD5], [openssl/md5.h], [openssl/sha.h]),
             [LIB_CRYPTO=-lcrypto
              AC_DEFINE([HAVE_OPENSSL_$1], [1],
                [Define to 1 if libcrypto is used for $1.])])])
      fi
      if test "x$LIB_CRYPTO" = x; then
        message='openssl development library not found for $1.
    If you want to install it, first find the pre-built package name:
      - On Debian and Debian-based systems: libssl-dev,
      - On Red Hat distributions: openssl-devel.
      - Other: https://repology.org/project/openssl/versions'
        if test "x$with_openssl" = xyes; then
          AC_MSG_ERROR([$message])
        elif test "x$with_openssl" = xoptional; then
          AC_MSG_WARN([$message])
        fi
      fi
    fi
  ])
  

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