m4/guix.m4


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dnl GNU Guix --- Functional package management for GNU
dnl Copyright © 2012, 2013, 2014, 2015, 2016, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
dnl Copyright © 2014 Mark H Weaver <mhw@netris.org>
dnl Copyright © 2017, 2020, 2021, 2023 Efraim Flashner <efraim@flashner.co.il>
dnl Copyright © 2021 Chris Marusich <cmmarusich@gmail.com>
dnl
dnl This file is part of GNU Guix.
dnl
dnl GNU Guix is free software; you can redistribute it and/or modify it
dnl under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or (at
dnl your option) any later version.
dnl
dnl GNU Guix is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

dnl GUIX_SYSTEM_TYPE
dnl
dnl Determine the Guix host system type, and store it in the
dnl `guix_system' variable.
AC_DEFUN([GUIX_SYSTEM_TYPE], [
  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_PATH_PROG([SED], [sed])

  AC_ARG_WITH(system, AS_HELP_STRING([--with-system=SYSTEM],
    [Platform identifier (e.g., `i686-linux').]),
    [guix_system="$withval"],
    [case "$host_cpu" in
       i*86)
	  machine_name="i686";;
       amd64)
          machine_name="x86_64";;
       arm|armv[[7-9]]*)
          # Here we want to exclude CPUs such as "armv6l".  On ARMv7
          # machines, we normally get "armv7l".  However, in Guix, we
          # configure with --build=arm-unknown-linux-gnueabihf, leading
          # to just "arm", so we also have to allow it.
          #
          # TODO: If not cross-compiling, add a sanity check to make
          #       sure this build machine has the needed features to
          #       support executables compiled using our armhf gcc,
          #       configured with:
          #         --with-arch=armv7-a
          #         --with-float=hard
          #         --with-mode=thumb
          #         --with-fpu=vfpv3-d16
	  machine_name="armhf";;
       *)
	  machine_name="$host_cpu";;
     esac

     case "$host_os" in
       linux-gnu*)
	  # For backward compatibility, strip the `-gnu' part.
	  guix_system="$machine_name-linux";;
       linux-musl*)
	  guix_system="$machine_name-linux";;
       gnu*)
          # Always use i586 for GNU/Hurd.
          guix_system="i586-gnu";;
       *)
	  # Strip the version number from names such as `gnu0.3',
	  # `darwin10.2.0', etc.
	  guix_system="$machine_name-`echo $host_os | "$SED" -e's/[0-9.]*$//g'`";;
     esac])

  AC_MSG_CHECKING([for the Guix system type])
  AC_MSG_RESULT([$guix_system])

  AC_SUBST([guix_system])
])

dnl GUIX_ASSERT_SUPPORTED_SYSTEM
dnl
dnl Assert that this is a system to which the distro is ported.
AC_DEFUN([GUIX_ASSERT_SUPPORTED_SYSTEM], [
  AC_REQUIRE([GUIX_SYSTEM_TYPE])

  AC_ARG_WITH([courage], [AS_HELP_STRING([--with-courage],
    [Assert that even if this platform is unsupported, you will be
courageous and port the GNU System distribution to it (see
"GNU Distribution" in the manual.)])],
    [guix_courageous="$withval"],
    [guix_courageous="no"])

  # Currently only Linux-based systems are supported, and only on some
  # platforms.
  case "$guix_system" in
    x86_64-linux|i686-linux|armhf-linux|aarch64-linux|powerpc64le-linux|riscv64-linux|i586-gnu)
      ;;
    mips64el-linux|powerpc-linux)
      AC_MSG_WARN([building Guix on `$guix_system', which is not supported])
      ;;
    *)
      if test "x$guix_courageous" = "xyes"; then
        AC_MSG_WARN([building Guix on `$guix_system', which is not supported])
      else
        AC_MSG_ERROR([`$guix_system' is not a supported platform.
See "GNU Distribution" in the manual, or try `--with-courage'.])
      fi
      ;;
  esac
])

dnl GUIX_ASSERT_GUILE_FEATURES FEATURES
dnl
dnl Assert that FEATURES are provided by $GUILE.
AC_DEFUN([GUIX_ASSERT_GUILE_FEATURES], [
  for guix_guile_feature in $1
  do
    AC_MSG_CHECKING([whether $GUILE provides feature '$guix_guile_feature'])
    if "$GUILE" -c "(exit (provided? '$guix_guile_feature))"
    then
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([no])
      AC_MSG_ERROR([$GUILE does not support feature '$guix_guile_feature', which is required.])
    fi
  done
])

dnl GUIX_CHECK_GUILE_SSH
dnl
dnl Check whether a recent-enough Guile-SSH is available.
AC_DEFUN([GUIX_CHECK_GUILE_SSH], [
  dnl Check whether '#:nodelay' parameter to 'make-session' (introduced in
  dnl 0.13.0) is present.
  AC_CACHE_CHECK([whether Guile-SSH is available and recent enough],
    [guix_cv_have_recent_guile_ssh],
    [GUILE_CHECK([retval],
      [(and (@ (ssh channel) channel-send-eof)
            (@ (ssh popen) open-remote-pipe)
            (@ (ssh dist node) node-eval)
            (@ (ssh auth) userauth-gssapi!)
            ((@ (ssh session) make-session) #:nodelay #t))])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_ssh="yes"
     else
       guix_cv_have_recent_guile_ssh="no"
     fi])
])

dnl GUIX_CHECK_GUILE_SQLITE3
dnl
dnl Check whether a recent-enough Guile-Sqlite3 is available.
AC_DEFUN([GUIX_CHECK_GUILE_SQLITE3], [
  dnl Check whether 'sqlite-bind-arguments' is available.  It was introduced
  dnl in February 2018:
  dnl <https://notabug.org/guile-sqlite3/guile-sqlite3/commit/1cd1dec96a9999db48c0ff45bab907efc637247f>.
  AC_CACHE_CHECK([whether Guile-Sqlite3 is available and recent enough],
    [guix_cv_have_recent_guile_sqlite3],
    [GUILE_CHECK([retval],
      [(@ (sqlite3) sqlite-bind-arguments)])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_sqlite3="yes"
     else
       guix_cv_have_recent_guile_sqlite3="no"
     fi])
])

dnl GUIX_CHECK_GUILE_JSON
dnl
dnl Check whether a recent-enough Guile-JSON is available.
AC_DEFUN([GUIX_CHECK_GUILE_JSON], [
  dnl Check whether we're using Guile-JSON 4.3+, which provides
  dnl 'define-json-mapping'.
  AC_CACHE_CHECK([whether Guile-JSON is available and recent enough],
    [guix_cv_have_recent_guile_json],
    [GUILE_CHECK([retval],
      [(use-modules (json))

       (define-json-mapping <frob> make-frob
         frob?
	 json->frob
	 (a frob-a)
	 (b frob-b \"bee\"))

       (exit
        (equal? (json->frob
                 (open-input-string \"{ \\\"a\\\": 1, \\\"bee\\\": 2 }\"))
                (make-frob 1 2)))])
     if test "$retval" = 0; then
       guix_cv_have_recent_guile_json="yes"
     else
       guix_cv_have_recent_guile_json="no"
     fi])
])

dnl GUIX_CHECK_GUILE_GCRYPT
dnl
dnl Check whether a recent-enough Guile-Gcrypt is available.
AC_DEFUN([GUIX_CHECK_GUILE_GCRYPT], [
  dnl Check whether we're using Guile-Gcrypt 0.2.x or later.  0.2.0
  dnl introduced the 'hash-algorithm' macro and related code.
  AC_CACHE_CHECK([whether Guile-Gcrypt is available and recent enough],
    [guix_cv_have