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dnl GNU Guix --- Functional package management for GNU
dnl Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
dnl Copyright © 2014 Mark H Weaver <mhw@netris.org>
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_ASSERT_LIBGCRYPT_USABLE
dnl
dnl Assert that GNU libgcrypt is usable from Guile.
AC_DEFUN([GUIX_ASSERT_LIBGCRYPT_USABLE],
[AC_CACHE_CHECK([whether $LIBGCRYPT can be dynamically loaded],
[guix_cv_libgcrypt_usable_p],
[GUILE_CHECK([retval],
[(dynamic-func \"gcry_md_hash_buffer\" (dynamic-link \"$LIBGCRYPT\"))])
if test "$retval" = 0; then
guix_cv_libgcrypt_usable_p="yes"
else
guix_cv_libgcrypt_usable_p="no"
fi])
if test "x$guix_cv_libgcrypt_usable_p" != "xyes"; then
AC_MSG_ERROR([GNU libgcrypt does not appear to be usable; see `--with-libgcrypt-prefix' and `README'.])
fi])
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, AC_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="$machine_name-linux";;
*)
# Strip the version number from names such as `gnu0.3',
# `darwin10.2.0', etc.
guix_system="$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], [AC_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|mips64el-linux)
;;
*)
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_SRFI_37
dnl
dnl Check whether SRFI-37 suffers from <http://bugs.gnu.org/13176>.
dnl This bug was fixed in Guile 2.0.9.
AC_DEFUN([GUIX_CHECK_SRFI_37], [
AC_CACHE_CHECK([whether (srfi srfi-37) is affected by http://bugs.gnu.org/13176],
[ac_cv_guix_srfi_37_broken],
[if "$GUILE" -c "(use-modules (srfi srfi-37)) \
(sigaction SIGALRM (lambda _ (primitive-exit 1))) \
(alarm 1) \
(define opts (list (option '(#\I) #f #t (lambda _ #t)))) \
(args-fold '(\"-I\") opts (lambda _ (error)) (lambda _ #f) '())"
then
ac_cv_guix_srfi_37_broken=no
else
ac_cv_guix_srfi_37_broken=yes
fi])
])
dnl GUIX_CHECK_UNBUFFERED_CBIP
dnl
dnl Check whether 'setbvuf' works on custom binary input ports (CBIPs), as is
dnl the case starting with Guile 2.0.10.
AC_DEFUN([GUIX_CHECK_UNBUFFERED_CBIP], [
AC_CACHE_CHECK([whether Guile's custom binary input ports support 'setvbuf'],
[ac_cv_guix_cbips_support_setvbuf],
[if "$GUILE" -c "(use-modules (rnrs io ports)) \
(let ((p (make-custom-binary-input-port \"cbip\" pk #f #f #f))) \
(setvbuf p _IONBF))" >&5 2>&1
then
ac_cv_guix_cbips_support_setvbuf=yes
else
ac_cv_guix_cbips_support_setvbuf=no
fi])
])
dnl GUIX_TEST_ROOT_DIRECTORY
AC_DEFUN([GUIX_TEST_ROOT_DIRECTORY], [
AC_CACHE_CHECK([for unit test root directory],
[ac_cv_guix_test_root],
[ac_cv_guix_test_root="`pwd`/test-tmp"])
])
dnl 'BINPRM_BUF_SIZE' constant in Linux (we leave room for the trailing zero.)
dnl The Hurd has a limit of about a page (see exec/hashexec.c.)
m4_define([LINUX_HASH_BANG_LIMIT], 127)
dnl Hardcoded 'sun_path' length in <sys/un.h>.
m4_define([SOCKET_FILE_NAME_LIMIT], 108)
dnl GUIX_SOCKET_FILE_NAME_LENGTH
AC_DEFUN([GUIX_SOCKET_FILE_NAME_LENGTH], [
AC_CACHE_CHECK([the length of the installed socket file name],
[ac_cv_guix_socket_file_name_length],
[ac_cv_guix_socket_file_name_length="`echo -n "$guix_localstatedir/guix/daemon-socket/socket" | wc -c`"])
])
dnl GUIX_TEST_SOCKET_FILE_NAME_LENGTH
AC_DEFUN([GUIX_TEST_SOCKET_FILE_NAME_LENGTH], [
AC_REQUIRE([GUIX_TEST_ROOT_DIRECTORY])
AC_CACHE_CHECK([the length of the socket file name used in tests],
[ac_cv_guix_test_socket_file_name_length],
[ac_cv_guix_test_socket_file_name_length="`echo -n "$ac_cv_guix_test_root/var/123456/daemon-socket/socket" | wc -c`"])
])
dnl GUIX_HASH_BANG_LENGTH
AC_DEFUN([GUIX_HASH_BANG_LENGTH], [
AC_CACHE_CHECK([the length of a typical hash bang line],
[ac_cv_guix_hash_bang_length],
[ac_cv_guix_hash_bang_length=`echo -n "$storedir/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bootstrap-binaries-0/bin/bash" | wc -c`])
])
dnl GUIX_TEST_HASH_BANG_LENGTH
AC_DEFUN([GUIX_TEST_HASH_BANG_LENGTH], [
AC_REQUIRE([GUIX_TEST_ROOT_DIRECTORY])
AC_CACHE_CHECK([the length of a hash bang line used in tests],
[ac_cv_guix_test_hash_bang_length],
[ac_cv_guix_test_hash_bang_length=`echo -n "$ac_cv_guix_test_root/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bootstrap-binaries-0/bin/bash" | wc -c`])
])
dnl GUIX_CHECK_FILE_NAME_LIMITS
dnl
dnl GNU/Linux has a couple of silly limits that we can easily run into.
dnl Make sure everything is fine with the current settings. Set $1 to
dnl 'yes' if tests can run, 'no' otherwise.
AC_DEFUN([GUIX_CHECK_FILE_NAME_LIMITS], [
AC_REQUIRE([GUIX_SOCKET_FILE_NAME_LENGTH])
AC_REQUIRE([GUIX_TEST_SOCKET_FILE_NAME_LENGTH])
AC_REQUIRE([GUIX_HASH_BANG_LENGTH])
AC_REQUIRE([GUIX_TEST_HASH_BANG_LENGTH])
if test "$ac_cv_guix_socket_file_name_length" -ge ]SOCKET_FILE_NAME_LIMIT[; then
AC_MSG_ERROR([socket file name would exceed the maxium allowed length])
fi
if test "$ac_cv_guix_test_socket_file_name_length" -ge ]SOCKET_FILE_NAME_LIMIT[; then
AC_MSG_WARN([socket file name limit may be exceeded when running tests])
fi
$1=yes
if test "$ac_cv_guix_hash_bang_length" -ge ]LINUX_HASH_BANG_LIMIT[; then
$1=no
AC_MSG_ERROR([store directory '$storedir' would lead to overly long hash-bang lines])
fi
if test "$ac_cv_guix_test_hash_bang_length" -ge ]LINUX_HASH_BANG_LIMIT[; then
$1=no
AC_MSG_WARN([test directory '$ac_cv_guix_test_root' may lead to overly long hash-bang lines])
fi
])
dnl GUIX_CHECK_CXX11
dnl
dnl Check whether the C++ compiler can compile a typical C++11 program.
AC_DEFUN([GUIX_CHECK_CXX11], [
AC_REQUIRE([AC_PROG_CXX])
AC_CACHE_CHECK([whether $CXX supports C++11],
[ac_cv_guix_cxx11_support],
[save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="-std=c++11 $CXXFLAGS"
AC_COMPILE_IFELSE([
AC_LANG_SOURCE([
#include <functional>
std::function<int(int)>
return_plus_lambda (int x)
{
auto result = [[&]](int y) {
return x + y;
};
return result;
}
])],
[ac_cv_guix_cxx11_support=yes],
[ac_cv_guix_cxx11_support=no])
CXXFLAGS="$save_CXXFLAGS"
])
])
dnl GUIX_ASSERT_CXX11
dnl
dnl Error out if the C++ compiler cannot compile C++11 code.
AC_DEFUN([GUIX_ASSERT_CXX11], [
GUIX_CHECK_CXX11
if test "x$ac_cv_guix_cxx11_support" != "xyes"; then
AC_MSG_ERROR([C++ compiler '$CXX' does not support the C++11 standard])
fi
])
dnl GUIX_CHECK_LIBC_MOUNT
dnl
dnl Check whether libc provides 'mount'. On GNU/Hurd it doesn't (yet).
AC_DEFUN([GUIX_CHECK_LIBC_MOUNT], [
AC_CACHE_CHECK([whether libc provides 'mount'], [guix_cv_libc_has_mount],
[GUILE_CHECK([retval], [(dynamic-func \"mount\" (dynamic-link))])
if test "$retval" = 0; then
guix_cv_libc_has_mount="yes"
else
guix_cv_libc_has_mount="no"
fi])
])
dnl GUIX_LIBGCRYPT_LIBDIR VAR
dnl
dnl Attempt to determine libgcrypt's LIBDIR; store the result in VAR.
AC_DEFUN([GUIX_LIBGCRYPT_LIBDIR], [
AC_PATH_PROG([LIBGCRYPT_CONFIG], [libgcrypt-config])
AC_CACHE_CHECK([libgcrypt's library directory],
[guix_cv_libgcrypt_libdir],
[if test "x$LIBGCRYPT_CONFIG" != "x"; then
guix_cv_libgcrypt_libdir=`$LIBGCRYPT_CONFIG --libs | grep -e -L | sed -e "s/.*-L\([[^ ]]\+\)[[[:blank:]]]\+-lgcrypt.*/\1/g"`
else
guix_cv_libgcrypt_libdir=""
fi])
$1="$guix_cv_libgcrypt_libdir"
])
dnl GUIX_CURRENT_LOCALSTATEDIR
dnl
dnl Determine the localstatedir of an existing Guix installation and set
dnl 'guix_cv_current_localstatedir' accordingly. Set it to "none" if no
dnl existing installation was found.
AC_DEFUN([GUIX_CURRENT_LOCALSTATEDIR], [
AC_PATH_PROG([GUILE], [guile])
AC_CACHE_CHECK([the current installation's localstatedir],
[guix_cv_current_localstatedir],
[dnl Call 'dirname' because (guix config) appends "/guix" to LOCALSTATEDIR.
guix_cv_current_localstatedir="`"$GUILE" \
-c '(use-modules (guix config))
(when (string=? %store-directory "'$storedir'")
(display (dirname %state-directory)))' \
2>/dev/null`"
if test "x$guix_cv_current_localstatedir" = "x"; then
guix_cv_current_localstatedir=none
fi])])
dnl GUIX_CHECK_LOCALSTATEDIR
dnl
dnl Check that the LOCALSTATEDIR value is consistent with that of the existing
dnl Guix installation, if any. Error out or warn if they do not match.
AC_DEFUN([GUIX_CHECK_LOCALSTATEDIR], [
AC_REQUIRE([GUIX_CURRENT_LOCALSTATEDIR])
if test "x$guix_cv_current_localstatedir" != "xnone"; then
if test "$guix_cv_current_localstatedir" != "$guix_localstatedir"; then
case "$localstatedir" in
NONE|\${prefix}*)
# User kept the default value---i.e., did not pass '--localstatedir'.
AC_MSG_ERROR([chosen localstatedir '$guix_localstatedir' does not match \
that of the existing installation '$guix_cv_current_localstatedir'
Installing may corrupt $storedir!
Use './configure --localstatedir=$guix_cv_current_localstatedir'.])
;;
*)
# User passed an explicit '--localstatedir'. Assume they know what
# they're doing.
AC_MSG_WARN([chosen localstatedir '$guix_localstatedir' does not match \
that of the existing installation '$guix_cv_current_localstatedir'])
AC_MSG_WARN([installing may corrupt $storedir!])
;;
esac
fi
fi])