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configure.ac
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configure.ac
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dnl Autoconf script for GNU Emacs
dnl To rebuild the 'configure' script from this, execute the command
dnl autoconf
dnl in the directory containing this script.
dnl If you changed any AC_DEFINES, also run autoheader.
dnl
dnl Copyright (C) 1994-1996, 1999-2020 Free Software Foundation, Inc.
dnl
dnl This file is part of GNU Emacs.
dnl
dnl GNU Emacs is free software: you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation, either version 3 of the License, or
dnl (at your option) any later version.
dnl
dnl GNU Emacs is distributed in the hope that it will be useful,
dnl but 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 Emacs. If not, see <https://www.gnu.org/licenses/>.
AC_PREREQ(2.65)
dnl Note this is parsed by (at least) make-dist and lisp/cedet/ede/emacs.el.
AC_INIT(GNU Emacs, 28.0.50, bug-gnu-emacs@gnu.org, , https://www.gnu.org/software/emacs/)
dnl Set emacs_config_options to the options of 'configure', quoted for the shell,
dnl and then quoted again for a C string. Separate options with spaces.
dnl Add some environment variables, if they were passed via the environment
dnl rather than on the command-line.
emacs_config_options=
optsep=
dnl This is the documented way to record the args passed to configure,
dnl rather than $ac_configure_args.
for opt in "$@" CFLAGS CPPFLAGS LDFLAGS; do
case $opt in
-n | --no-create | --no-recursion)
continue ;;
CFLAGS | CPPFLAGS | LDFLAGS)
eval 'test "${'$opt'+set}" = set' || continue
case " $*" in
*" $opt="*) continue ;;
esac
eval opt=$opt=\$$opt ;;
esac
emacs_shell_specials=$IFS\''"#$&()*;<>?@<:@\\`{|~'
case $opt in
*[["$emacs_shell_specials"]]*)
case $opt in
*\'*)
emacs_quote_apostrophes="s/'/'\\\\''/g"
opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_apostrophes"` ;;
esac
opt="'$opt'"
case $opt in
*[['"\\']]*)
emacs_quote_for_c='s/[["\\]]/\\&/g; $!s/$/\\n\\/'
opt=`AS_ECHO(["$opt"]) | sed "$emacs_quote_for_c"` ;;
esac ;;
esac
AS_VAR_APPEND([emacs_config_options], ["$optsep$opt"])
optsep=' '
done
AC_CONFIG_HEADERS(src/config.h:src/config.in)
AC_CONFIG_SRCDIR(src/lisp.h)
AC_CONFIG_AUX_DIR(build-aux)
AC_CONFIG_MACRO_DIR(m4)
xcsdkdir=
AC_CHECK_PROGS(XCRUN, [xcrun])
if test -n "$XCRUN"; then
if test -z "$MAKE"; then
dnl Call the variable MAKE_PROG, not MAKE, to avoid confusion with
dnl the usual MAKE variable that 'make' itself uses.
AC_CHECK_PROG([MAKE_PROG], [make], [yes])
if test -z "$MAKE_PROG"; then
MAKE="$XCRUN MAKE"
export MAKE
xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
fi
fi
fi
dnl Check for GNU Make and possibly set MAKE.
[emacs_check_gnu_make ()
{
emacs_makeout=`($1 --version) 2>/dev/null` &&
case $emacs_makeout in
'GNU Make '3.8[1-9]* | 'GNU Make '3.9[0-9]* | \
'GNU Make '3.[1-9][0-9][0-9]* | 'GNU Make '[4-9]* | 'GNU Make '[1-9][0-9]* )
ac_path_MAKE_found=:;;
esac
}]
AC_CACHE_CHECK([for GNU Make], [ac_cv_path_MAKE],
[ac_path_MAKE_found=false
if test -n "$MAKE"; then
emacs_check_gnu_make "$MAKE"
ac_cv_path_MAKE=$MAKE
else
emacs_tried_make=false
emacs_tried_gmake=false
emacs_tried_gnumake=false
AC_PATH_PROGS_FEATURE_CHECK([MAKE], [make gmake gnumake],
[[emacs_check_gnu_make "$ac_path_MAKE"
if $ac_path_MAKE_found; then
# Use the fully-qualified program name only if the basename
# would not resolve to it.
if eval \$emacs_tried_$ac_prog; then
ac_cv_path_MAKE=$ac_path_MAKE
else
ac_cv_path_MAKE=$ac_prog
fi
fi
eval emacs_tried_$ac_prog=:]])
fi])
$ac_path_MAKE_found || {
AC_MSG_ERROR([[Building Emacs requires GNU Make, at least version 3.81.
If you have it installed under another name, configure with 'MAKE=...'.
For example, run '$0 MAKE=gnu-make'.]])
}
MAKE=$ac_cv_path_MAKE
export MAKE
dnl Canonicalize the configuration name.
AC_CANONICAL_HOST
case $host in
*-mingw*)
if test -z "$host_alias"; then
# No --host argument was given to 'configure'; therefore $host
# was set to a default value based on the build platform. But
# this default value may be wrong if we are building from a
# 64-bit MSYS[2] pre-configured to build 32-bit MinGW programs.
# Therefore, we'll try to get the right host platform from the
# compiler's target.
AC_MSG_CHECKING([the compiler's target])
if test -z "$CC"; then
cc=gcc
else
cc=$CC
fi
cc_target=`$cc -v 2>&1 | sed -n 's/Target: //p'`
case "$cc_target" in
*-*) host=$cc_target
;;
"") AC_MSG_ERROR([Impossible to obtain $cc compiler target.
Please explicitly provide --host.])
;;
*) AC_MSG_WARN([Compiler reported non-standard target.
Defaulting to $host.])
;;
esac
AC_MSG_RESULT([$host])
fi
. $srcdir/nt/mingw-cfg.site
case $srcdir in
/* | ?:*)
# srcdir is an absolute path. In this case, force the format
# "/c/foo/bar", to simplify later conversions to native Windows
# format ("c:/foo/bar").
srcdir=`cd "${srcdir}" && pwd -W`
# 'eval' pacifies strict POSIX non-MinGW shells (Bug#18612).
# We downcase the drive letter to avoid warnings when
# generating autoloads.
eval 'srcdir=/`echo ${srcdir:0:1} | sed "y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/"`"${srcdir:2}"'
;;
esac;;
esac
canonical=$host
configuration=${host_alias-${build_alias-$host}}
emacs_uname_r=`uname -r`
dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM
dnl It is important that variables on the RHS not be expanded here,
dnl hence the single quotes. This is per the GNU coding standards, see
dnl (autoconf) Installation Directory Variables
dnl See also epaths.h below.
lispdir='${datadir}/emacs/${version}/lisp'
standardlisppath='${lispdir}'
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
lisppath='${locallisppath}:${standardlisppath}'
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
etcdocdir='${datadir}/emacs/${version}/etc'
gamedir='${localstatedir}/games/emacs'
dnl Special option to disable the most of other options.
AC_ARG_WITH(all,
[AS_HELP_STRING([--without-all],
[omit almost all features and build
small executable with minimal dependencies])],
[with_features=$withval],
[with_features=yes])
dnl OPTION_DEFAULT_OFF(NAME, HELP-STRING)
dnl Create a new --with option that defaults to being disabled.
dnl NAME is the base name of the option. The shell variable with_NAME
dnl will be set to either the user's value (if the option is
dnl specified; 'yes' for a plain --with-NAME) or to 'no' (if the
dnl option is not specified). Note that the shell variable name is
dnl constructed as autoconf does, by replacing non-alphanumeric
dnl characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_OFF], [dnl
AC_ARG_WITH([$1],[AS_HELP_STRING([--with-$1],[$2])],[],[dnl
m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=no])dnl
])dnl
dnl OPTION_DEFAULT_IFAVAILABLE(NAME, HELP-STRING)
dnl Create a new --with option that defaults to 'ifavailable'.
dnl NAME is the base name of the option. The shell variable with_NAME
dnl will be set to either the user's value (if the option is
dnl specified; 'yes' for a plain --with-NAME) or to 'ifavailable' (if the
dnl option is not specified). Note that the shell variable name is
dnl constructed as autoconf does, by replacing non-alphanumeric
dnl characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_IFAVAILABLE], [dnl
AC_ARG_WITH([$1],[AS_HELP_STRING([--with-$1],[$2])],[],[dnl
m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=ifavailable])dnl
])dnl
dnl OPTION_DEFAULT_ON(NAME, HELP-STRING)
dnl Create a new --with option that defaults to $with_features.
dnl NAME is the base name of the option. The shell variable with_NAME
dnl will be set either to 'no' (for a plain --without-NAME) or to
dnl 'yes' (if the option is not specified). Note that the shell
dnl variable name is constructed as autoconf does, by replacing
dnl non-alphanumeric characters with "_".
dnl HELP-STRING is the help text for the option.
AC_DEFUN([OPTION_DEFAULT_ON], [dnl
AC_ARG_WITH([$1],[AS_HELP_STRING([--without-$1],[$2])],[],[dnl
m4_bpatsubst([with_$1], [[^0-9a-z]], [_])=$with_features])dnl
])dnl
# For retrieving mail, unencrypted network connections are the default
# only on native MS-Windows platforms. (FIXME: These platforms should
# also be secure by default.)
AC_ARG_WITH([mailutils],
[AS_HELP_STRING([--with-mailutils],
[rely on GNU Mailutils, so that the --without-pop through --with-mailhost
options are irrelevant; this is the default if GNU Mailutils is
installed])],
[],
[with_mailutils=$with_features
if test "$with_mailutils" = yes; then
(movemail --version) >/dev/null 2>&1 || with_mailutils=no
fi])
if test "$with_mailutils" = no; then
with_mailutils=
fi
AC_SUBST([with_mailutils])
AC_ARG_WITH([pop],
[AS_HELP_STRING([--with-pop],
[Support POP mail retrieval if Emacs movemail is used (not recommended,
as Emacs movemail POP is insecure). This is the default only on
native MS-Windows.])],
[],
[case $host in
*-mingw*) with_pop=yes;;
*) with_pop=no-by-default;;
esac])
if test "$with_pop" = yes; then
AC_DEFINE(MAIL_USE_POP)
fi
AH_TEMPLATE(MAIL_USE_POP, [Define to support POP mail retrieval.])dnl
OPTION_DEFAULT_OFF([kerberos],[support Kerberos-authenticated POP])
if test "$with_kerberos" != no; then
AC_DEFINE(KERBEROS)
fi
AH_TEMPLATE(KERBEROS,
[Define to support Kerberos-authenticated POP mail retrieval.])dnl
OPTION_DEFAULT_OFF([kerberos5],[support Kerberos version 5 authenticated POP])
if test "${with_kerberos5}" != no; then
if test "${with_kerberos}" = no; then
with_kerberos=yes
AC_DEFINE(KERBEROS)
fi
AC_DEFINE(KERBEROS5, 1, [Define to use Kerberos 5 instead of Kerberos 4.])
fi
OPTION_DEFAULT_OFF([hesiod],[support Hesiod to get the POP server host])
dnl FIXME hesiod support may not be present, so it seems like an error
dnl to define, or at least use, this unconditionally.
if test "$with_hesiod" != no; then
AC_DEFINE(HESIOD, 1, [Define to support using a Hesiod database to find the POP server.])
fi
OPTION_DEFAULT_OFF([mail-unlink],[unlink, rather than empty, mail spool after reading])
if test "$with_mail_unlink" != no; then
AC_DEFINE(MAIL_UNLINK_SPOOL, 1, [Define to unlink, rather than empty, mail spool after reading.])
fi
AC_ARG_WITH([mailhost],[AS_HELP_STRING([--with-mailhost=HOSTNAME],
[string giving default POP mail host])],
AC_DEFINE_UNQUOTED(MAILHOST, ["$withval"], [String giving fallback POP mail host.]))
AC_ARG_WITH([sound],[AS_HELP_STRING([--with-sound=VALUE],
[compile with sound support (VALUE one of: yes, alsa, oss, bsd-ossaudio, no;
default yes). Only for GNU/Linux, FreeBSD, NetBSD, MinGW, Cygwin.])],
[ case "${withval}" in
yes|no|alsa|oss|bsd-ossaudio) val=$withval ;;
*) AC_MSG_ERROR(['--with-sound=$withval' is invalid;
this option's value should be 'yes', 'no', 'alsa', 'oss', or 'bsd-ossaudio'.])
;;
esac
with_sound=$val
],
[with_sound=$with_features])
AC_ARG_WITH([pdumper],
AS_HELP_STRING(
[--with-pdumper=VALUE],
[enable pdumper support unconditionally
('yes', 'no', or 'auto': default 'auto')]),
[ case "${withval}" in
yes|no|auto) val=$withval ;;
*) AC_MSG_ERROR(
['--with-pdumper=$withval' is invalid;
this option's value should be 'yes' or 'no'.]) ;;
esac
with_pdumper=$val
],
[with_pdumper=auto])
AC_ARG_WITH([unexec],
AS_HELP_STRING(
[--with-unexec=VALUE],
[enable unexec support unconditionally
('yes', 'no', or 'auto': default 'auto')]),
[ case "${withval}" in
yes|no|auto) val=$withval ;;
*) AC_MSG_ERROR(
['--with-unexec=$withval' is invalid;
this option's value should be 'yes' or 'no'.]) ;;
esac
with_unexec=$val
],
[with_unexec=auto])
AC_ARG_WITH([dumping],[AS_HELP_STRING([--with-dumping=VALUE],
[kind of dumping to use for initial Emacs build
(VALUE one of: pdumper, unexec, none; default pdumper)])],
[ case "${withval}" in
pdumper|unexec|none) val=$withval ;;
*) AC_MSG_ERROR(['--with-dumping=$withval is invalid;
this option's value should be 'pdumper', 'unexec', or 'none'.])
;;
esac
with_dumping=$val
],
[with_dumping=pdumper])
if test "$with_pdumper" = "auto"; then
if test "$with_dumping" = "pdumper"; then
with_pdumper=yes
else
with_pdumper=no
fi
fi
if test "$with_unexec" = "auto"; then
if test "$with_dumping" = "unexec"; then
with_unexec=yes
else
with_unexec=no
fi
fi
if test "$with_dumping" = "pdumper" && test "$with_pdumper" = "no"; then
AC_MSG_ERROR(['--with-dumping=pdumper' requires pdumper support])
fi
if test "$with_dumping" = "unexec" && test "$with_unexec" = "no"; then
AC_MSG_ERROR(['--with-dumping=unexec' requires unexec support])
fi
if test "$with_pdumper" = "yes"; then
AC_DEFINE([HAVE_PDUMPER], 1, [Define to build with portable dumper support])
HAVE_PDUMPER=yes
else
HAVE_PDUMPER=no
fi
AC_SUBST([HAVE_PDUMPER])
DUMPING=$with_dumping
AC_SUBST(DUMPING)
dnl FIXME currently it is not the last.
dnl This should be the last --with option, because --with-x is
dnl added later on when we find the file name of X, and it's best to
dnl keep them together visually.
AC_ARG_WITH([x-toolkit],[AS_HELP_STRING([--with-x-toolkit=KIT],
[use an X toolkit (KIT one of: yes or gtk, gtk2, gtk3, lucid or athena, motif, no)])],
[ case "${withval}" in
y | ye | yes ) val=gtk ;;
n | no ) val=no ;;
l | lu | luc | luci | lucid ) val=lucid ;;
a | at | ath | athe | athen | athena ) val=athena ;;
m | mo | mot | moti | motif ) val=motif ;;
g | gt | gtk ) val=gtk ;;
gtk2 ) val=gtk2 ;;
gtk3 ) val=gtk3 ;;
* )
AC_MSG_ERROR(['--with-x-toolkit=$withval' is invalid;
this option's value should be 'yes', 'no', 'lucid', 'athena', 'motif', 'gtk',
'gtk2' or 'gtk3'. 'yes' and 'gtk' are synonyms.
'athena' and 'lucid' are synonyms.])
;;
esac
with_x_toolkit=$val
])
OPTION_DEFAULT_OFF([wide-int],
[prefer wide Emacs integers (typically 62-bit);
on 32-bit hosts, this allows buffer and string size up to 2GB,
at the cost of 10% to 30% slowdown of Lisp interpreter
and larger memory footprint])
if test "$with_wide_int" = yes; then
AC_DEFINE([WIDE_EMACS_INT], 1, [Use long long for EMACS_INT if available.])
fi
dnl _ON results in a '--without' option in the --help output, so
dnl the help text should refer to "don't compile", etc.
with_xpm_set=${with_xpm+set}
OPTION_DEFAULT_ON([xpm],[don't compile with XPM image support])
OPTION_DEFAULT_ON([jpeg],[don't compile with JPEG image support])
OPTION_DEFAULT_ON([tiff],[don't compile with TIFF image support])
OPTION_DEFAULT_ON([gif],[don't compile with GIF image support])
OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])
OPTION_DEFAULT_ON([lcms2],[don't compile with Little CMS support])
OPTION_DEFAULT_ON([libsystemd],[don't compile with libsystemd support])
OPTION_DEFAULT_ON([cairo],[don't compile with Cairo drawing])
OPTION_DEFAULT_ON([xml2],[don't compile with XML parsing support])
OPTION_DEFAULT_OFF([imagemagick],[compile with ImageMagick image support])
OPTION_DEFAULT_ON([native-image-api], [don't use native image APIs (GDI+ on Windows)])
OPTION_DEFAULT_IFAVAILABLE([json], [compile with native JSON support])
OPTION_DEFAULT_ON([xft],[don't use XFT for anti aliased fonts])
OPTION_DEFAULT_ON([harfbuzz],[don't use HarfBuzz for text shaping])
OPTION_DEFAULT_ON([libotf],[don't use libotf for OpenType font support])
OPTION_DEFAULT_ON([m17n-flt],[don't use m17n-flt for text shaping])
OPTION_DEFAULT_ON([toolkit-scroll-bars],[don't use Motif/Xaw3d/GTK toolkit scroll bars])
OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
OPTION_DEFAULT_ON([xim],[at runtime, default X11 XIM to off])
OPTION_DEFAULT_ON([xdbe],[don't use X11 double buffering support])
AC_ARG_WITH([ns],[AS_HELP_STRING([--with-ns],
[use Nextstep (macOS Cocoa or GNUstep) windowing system.
On by default on macOS.])],[],[with_ns=maybe])
OPTION_DEFAULT_OFF([w32], [use native MS Windows GUI in a Cygwin build])
OPTION_DEFAULT_OFF([pgtk], [use pure GTK build without reliance on X libs (Wayland support) - Experimental])
OPTION_DEFAULT_ON([gpm],[don't use -lgpm for mouse support on a GNU/Linux console])
OPTION_DEFAULT_ON([dbus],[don't compile with D-Bus support])
AC_ARG_WITH([gconf],[AS_HELP_STRING([--with-gconf],
[compile with Gconf support (Gsettings replaces this)])],[],
[if test $with_features = yes; then
with_gconf=maybe
else
with_gconf=no
fi])
OPTION_DEFAULT_ON([gsettings],[don't compile with GSettings support])
OPTION_DEFAULT_ON([selinux],[don't compile with SELinux support])
OPTION_DEFAULT_ON([gnutls],[don't use -lgnutls for SSL/TLS support])
OPTION_DEFAULT_ON([zlib],[don't compile with zlib decompression support])
OPTION_DEFAULT_ON([modules],[don't compile with dynamic modules support])
OPTION_DEFAULT_ON([threads],[don't compile with elisp threading support])
AC_ARG_WITH([file-notification],[AS_HELP_STRING([--with-file-notification=LIB],
[use a file notification library (LIB one of: yes, inotify, kqueue, gfile, w32, no)])],
[ case "${withval}" in
y | ye | yes ) val=yes ;;
n | no ) val=no ;;
i | in | ino | inot | inoti | inotif | inotify ) val=inotify ;;
k | kq | kqu | kque | kqueu | kqueue ) val=kqueue ;;
g | gf | gfi | gfil | gfile ) val=gfile ;;
w | w3 | w32 ) val=w32 ;;
* ) AC_MSG_ERROR(['--with-file-notification=$withval' is invalid;
this option's value should be 'yes', 'no', 'inotify', 'kqueue', 'gfile' or 'w32'.
'yes' is a synonym for 'w32' on MS-Windows, for 'no' on Nextstep,
otherwise for the first of 'inotify', 'kqueue' or 'gfile' that is usable.])
;;
esac
with_file_notification=$val
],
[with_file_notification=$with_features])
OPTION_DEFAULT_OFF([xwidgets],
[enable use of xwidgets in Emacs buffers (requires gtk3 or macOS Cocoa)])
## For the times when you want to build Emacs but don't have
## a suitable makeinfo, and can live without the manuals.
dnl https://lists.gnu.org/r/emacs-devel/2008-04/msg01844.html
OPTION_DEFAULT_ON([makeinfo],[don't require makeinfo for building manuals])
## Makefile.in needs the cache file name.
AC_SUBST(cache_file)
## This is an option because I do not know if all info/man support
## compressed files, nor how to test if they do so.
OPTION_DEFAULT_ON([compress-install],
[don't compress some files (.el, .info, etc.) when installing. Equivalent to:
make GZIP_PROG= install])
AC_ARG_WITH(gameuser,dnl
[AS_HELP_STRING([--with-gameuser=USER_OR_GROUP],
[user for shared game score files.
An argument prefixed by ':' specifies a group instead.])])
gameuser=
gamegroup=
case ${with_gameuser} in
'' | no) ;;
yes) gamegroup=games ;;
:*) gamegroup=${with_gameuser#:} ;;
*) gameuser=${with_gameuser} ;;
esac
AC_ARG_WITH([gnustep-conf],dnl
[AS_HELP_STRING([--with-gnustep-conf=FILENAME],
[name of GNUstep configuration file to use on systems where the command
'gnustep-config' does not work; default $GNUSTEP_CONFIG_FILE, or
/etc/GNUstep/GNUstep.conf])])
test "X${with_gnustep_conf}" != X && test "${with_gnustep_conf}" != yes && \
GNUSTEP_CONFIG_FILE="${with_gnustep_conf}"
test "X$GNUSTEP_CONFIG_FILE" = "X" && \
GNUSTEP_CONFIG_FILE=/etc/GNUstep/GNUstep.conf
AC_ARG_ENABLE(ns-self-contained,
[AS_HELP_STRING([--disable-ns-self-contained],
[disable self contained build under NeXTstep])],
EN_NS_SELF_CONTAINED=$enableval,
EN_NS_SELF_CONTAINED=yes)
locallisppathset=no
AC_ARG_ENABLE(locallisppath,
[AS_HELP_STRING([--enable-locallisppath=PATH],
[directories Emacs should search for lisp files specific
to this site])],
if test "${enableval}" = "no"; then
locallisppath=
elif test "${enableval}" != "yes"; then
locallisppath=${enableval} locallisppathset=yes
fi)
AC_ARG_ENABLE(checking,
[AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
[enable expensive checks. With LIST,
enable only specific categories of checks.
Categories are: all,yes,no.
Flags are: stringbytes, stringoverrun, stringfreelist,
structs, glyphs])],
[ac_checking_flags="${enableval}"],[])
IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
CHECK_STRUCTS=false
for check in $ac_checking_flags
do
case $check in
# these set all the flags to specific states
yes) ac_enable_checking=1 ;;
no) ac_enable_checking= ;
CHECK_STRUCTS=false
ac_gc_check_stringbytes= ;
ac_gc_check_string_overrun= ;
ac_gc_check_string_free_list= ;
ac_glyphs_debug= ;;
all) ac_enable_checking=1 ;
CHECK_STRUCTS=true
ac_gc_check_stringbytes=1 ;
ac_gc_check_string_overrun=1 ;
ac_gc_check_string_free_list=1 ;
ac_glyphs_debug=1 ;;
# these enable particular checks
stringbytes) ac_gc_check_stringbytes=1 ;;
stringoverrun) ac_gc_check_string_overrun=1 ;;
stringfreelist) ac_gc_check_string_free_list=1 ;;
structs) CHECK_STRUCTS=true ;;
glyphs) ac_glyphs_debug=1 ;;
*) AC_MSG_ERROR(unknown check category $check) ;;
esac
done
IFS="$ac_save_IFS"
if test x$ac_enable_checking != x ; then
AC_DEFINE(ENABLE_CHECKING, 1,
[Define to 1 if expensive run-time data type and consistency checks are enabled.])
fi
if $CHECK_STRUCTS; then
AC_DEFINE([CHECK_STRUCTS], 1,
[Define this to check whether someone updated the portable dumper
code after changing the layout of a structure that it uses.
If you change one of these structures, check that the pdumper.c
code is still valid, and update the pertinent hash in pdumper.c
by manually copying the hash from the newly-generated dmpstruct.h.])
fi
AC_SUBST([CHECK_STRUCTS])
if test x$ac_gc_check_stringbytes != x ; then
AC_DEFINE(GC_CHECK_STRING_BYTES, 1,
[Define this temporarily to hunt a bug. If defined, the size of
strings is redundantly recorded in sdata structures so that it can
be compared to the sizes recorded in Lisp strings.])
fi
if test x$ac_gc_check_string_overrun != x ; then
AC_DEFINE(GC_CHECK_STRING_OVERRUN, 1,
[Define this to check for short string overrun.])
fi
if test x$ac_gc_check_string_free_list != x ; then
AC_DEFINE(GC_CHECK_STRING_FREE_LIST, 1,
[Define this to check the string free list.])
fi
if test x$ac_glyphs_debug != x ; then
AC_DEFINE(GLYPH_DEBUG, 1,
[Define this to enable glyphs debugging code.])
fi
dnl The name of this option is unfortunate. It predates, and has no
dnl relation to, the "sampling-based elisp profiler" added in 24.3.
dnl Actually, it stops it working.
dnl https://lists.gnu.org/r/emacs-devel/2012-11/msg00393.html
AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
[build emacs with low-level, gprof profiling support.
Mainly useful for debugging Emacs itself. May not work on
all platforms. Stops profiler.el working.])],
[ac_enable_profiling="${enableval}"],[])
if test x$ac_enable_profiling != x ; then
PROFILING_CFLAGS="-DPROFILING=1 -pg"
else
PROFILING_CFLAGS=
fi
AC_SUBST(PROFILING_CFLAGS)
AC_ARG_ENABLE(autodepend,
[AS_HELP_STRING([--enable-autodepend],
[automatically generate dependencies to .h-files.
Requires gcc, enabled if found.])],
[ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])
AC_ARG_ENABLE(gtk-deprecation-warnings,
[AS_HELP_STRING([--enable-gtk-deprecation-warnings],
[Show Gtk+/Gdk deprecation warnings for Gtk+ >= 3.0])],
[ac_enable_gtk_deprecation_warnings="${enableval}"],[])
BUILD_DETAILS=
AC_ARG_ENABLE([build-details],
[AS_HELP_STRING([--disable-build-details],
[Make the build more deterministic by omitting host
names, time stamps, etc. from the output.])],
[test "$enableval" = no && BUILD_DETAILS=--no-build-details])
AC_SUBST([BUILD_DETAILS])
dnl This used to use changequote, but, apart from 'changequote is evil'
dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
dnl the great gob of text. Thus it's not processed for possible expansion.
dnl Just make sure the brackets remain balanced.
dnl
dnl Since Emacs can't find matching pairs of quotes, boundaries are
dnl indicated by comments.
dnl quotation begins
[
### If you add support for a new configuration, add code to this
### switch statement to recognize your configuration name and select
### the appropriate opsys.
### As far as handling version numbers on operating systems is
### concerned, make sure things will fail in a fixable way. If
### /etc/MACHINES doesn't say anything about version numbers, be
### prepared to handle anything reasonably. If version numbers
### matter, be sure /etc/MACHINES says something about it.
opsys='' unported=no
case "${canonical}" in
## GNU/Linux and similar ports
*-*-linux* )
opsys=gnu-linux
;;
## FreeBSD ports
*-*-freebsd* )
opsys=freebsd
;;
## DragonFly ports
*-*-dragonfly* )
opsys=dragonfly
;;
## FreeBSD kernel + glibc based userland
*-*-kfreebsd*gnu* )
opsys=gnu-kfreebsd
;;
## NetBSD ports
*-*-netbsd* )
opsys=netbsd
;;
## OpenBSD ports
*-*-openbsd* | *-*-mirbsd* )
opsys=openbsd
;;
## Apple Darwin / macOS
*-apple-darwin* )
case "${canonical}" in
*-apple-darwin[0-9].*) unported=yes ;;
i[3456]86-* | x86_64-* | arm-* | aarch64-* ) ;;
* ) unported=yes ;;
esac
opsys=darwin
## FIXME: Find a way to use Fink if available (Bug#11507).
;;
## Chromium Native Client
*-nacl )
opsys=nacl
;;
## Cygwin ports
*-*-cygwin )
opsys=cygwin
;;
## HP 9000 series 700 and 800, running HP/UX
hppa*-hp-hpux10.2* )
opsys=hpux10-20
;;
hppa*-hp-hpux1[1-9]* )
opsys=hpux11
CFLAGS="-D_INCLUDE__STDC_A1_SOURCE $CFLAGS"
;;
## IBM machines
rs6000-ibm-aix4.[23]* )
opsys=aix4-2
;;
powerpc-ibm-aix4.[23]* )
opsys=aix4-2
;;
rs6000-ibm-aix[56]* )
opsys=aix4-2
;;
powerpc-ibm-aix[5-9]* | powerpc-ibm-aix[1-9][0-9]* )
opsys=aix4-2
;;
## Solaris
*-*-solaris* | *-*-sunos*)
case "${canonical}" in
i[3456]86-*-* ) ;;
amd64-*-*|x86_64-*-*) ;;
sparc* ) ;;
* ) unported=yes ;;
esac
opsys=solaris
## Watch out for a compiler that we know will not work.
if [ "$CC" = /usr/ucb/cc ]; then
## /usr/ucb/cc doesn't work;
## we should find some other compiler that does work.
unset CC
fi
;;
## QNX Neutrino
*-nto-qnx* )
opsys=qnxnto
test -z "$CC" && CC=qcc
LDFLAGS="-N2M $LDFLAGS"
;;
## Intel 386 machines where we don't care about the manufacturer.
i[3456]86-*-* )
case "${canonical}" in
*-darwin* ) opsys=darwin ;;
*-mingw* )
opsys=mingw32
# MinGW overrides and adds some system headers in nt/inc.
GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
;;
*-sysv4.2uw* ) opsys=unixware ;;
*-sysv5uw* ) opsys=unixware ;;
*-sysv5OpenUNIX* ) opsys=unixware ;;
## Otherwise, we'll fall through to the generic opsys code at the bottom.
esac
;;
# MinGW64
x86_64-*-* )
case "${canonical}" in
*-mingw* )
opsys=mingw32
# MinGW overrides and adds some system headers in nt/inc.
GCC_TEST_OPTIONS="-I $srcdir/nt/inc"
;;
## Otherwise, we'll fall through to the generic opsys code at the bottom.
esac
;;
* )
unported=yes
;;
esac
### If the code above didn't choose an operating system, just choose
### an operating system based on the configuration name. You really
### only want to use this when you have no idea what the right
### operating system is; if you know what operating systems a machine
### runs, it's cleaner to make it explicit in the case statement
### above.
if test x"${opsys}" = x; then
case "${canonical}" in
*-gnu* ) opsys=gnu ;;
* )
unported=yes
;;
esac
fi
]
dnl quotation ends
if test $unported = yes; then
AC_MSG_ERROR([Emacs does not support '${canonical}' systems.
If you think it should, please send a report to ${PACKAGE_BUGREPORT}.
Check 'etc/MACHINES' for recognized configuration names.])
fi
#### Choose a compiler.
dnl Don't bother to test for C89.
AC_DEFUN([_AC_PROG_CC_C89], [$2])
dnl Sets GCC=yes if using gcc.
AC_PROG_CC([gcc cc cl clang "$XCRUN gcc" "$XCRUN clang"])
if test -n "$XCRUN"; then
AC_CHECK_PROGS(AR, [ar "$XCRUN ar"])
test -n "$AR" && export AR
fi
dnl Emacs needs C99 or later.
gl_PROG_CC_C99
AC_PROG_CC_C_O
if test x$GCC = xyes; then
test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
fi
# Avoid gnulib's tests for -lcrypto, so that there's no static dependency on it.
AC_DEFUN([gl_CRYPTO_CHECK])
# Avoid gnulib's tests for HAVE_WORKING_O_NOATIME and HAVE_WORKING_O_NOFOLLOW,
# as we don't use them.
AC_DEFUN([gl_FCNTL_O_FLAGS])
# Avoid gnulib's test for pthread_sigmask.
funcs=
for func in $ac_func_list; do
test $func = pthread_sigmask || AS_VAR_APPEND([funcs], [" $func"])
done
ac_func_list=$funcs
# Emacs does not use the wchar or wctype-h modules.
AC_DEFUN([gt_TYPE_WINT_T],
[GNULIB_OVERRIDES_WINT_T=0
AC_SUBST([GNULIB_OVERRIDES_WINT_T])])
# Initialize gnulib right after choosing the compiler.
dnl Amongst other things, this sets AR and ARFLAGS.
gl_EARLY
if test "$ac_test_CFLAGS" != set; then
# It's helpful to have C macros available to GDB, so prefer -g3 to -g
# if -g3 works and the user does not specify CFLAGS.
# This test must follow gl_EARLY; otherwise AC_LINK_IFELSE complains.
case $CFLAGS in
'-g')
emacs_g3_CFLAGS='-g3';;
'-g -O2')
emacs_g3_CFLAGS='-g3 -O2';;
*)
emacs_g3_CFLAGS='';;
esac
if test -n "$emacs_g3_CFLAGS"; then
emacs_save_CFLAGS=$CFLAGS
CFLAGS=$emacs_g3_CFLAGS
AC_CACHE_CHECK([whether $CC accepts $emacs_g3_CFLAGS],
[emacs_cv_prog_cc_g3],
[AC_LINK_IFELSE([AC_LANG_PROGRAM()],
[emacs_cv_prog_cc_g3=yes],
[emacs_cv_prog_cc_g3=no])])
if test $emacs_cv_prog_cc_g3 != yes; then
CFLAGS=$emacs_save_CFLAGS
fi
if test $opsys = mingw32; then
CFLAGS="$CFLAGS -gdwarf-2"
fi
fi
case $CFLAGS in
*-O*) ;;
*)
# No optimization flag was inferred for this non-GCC compiler.
# Try -O. This is needed for xlc on AIX; see Bug#14258.
emacs_save_CFLAGS=$CFLAGS
test -z "$CFLAGS" || CFLAGS="$CFLAGS "
CFLAGS=${CFLAGS}-O
AC_CACHE_CHECK([whether $CC accepts -O],
[emacs_cv_prog_cc_o],
[AC_LINK_IFELSE([AC_LANG_PROGRAM()],
[emacs_cv_prog_cc_o=yes],
[emacs_cv_prog_cc_o=no])])
if test $emacs_cv_prog_cc_o != yes; then
CFLAGS=$emacs_save_CFLAGS
fi ;;
esac
fi
# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
# ---------------------------------------------------------------------------
# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
# Otherwise, run RUN-IF-NOT-FOUND.
AC_DEFUN([gl_GCC_VERSION_IFELSE],
[AC_PREPROC_IFELSE(
[AC_LANG_PROGRAM(
[[
#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
/* ok */
#else
# error "your version of gcc is older than $1.$2"
#endif
]]),
], [$3], [$4])
]
)
AC_ARG_ENABLE([gcc-warnings],
[AS_HELP_STRING([--enable-gcc-warnings@<:@=TYPE@:>@],
[control generation of GCC warnings. The TYPE 'yes'
means to fail if any warnings are issued; 'warn-only'
means issue warnings without failing (default for
developer builds); 'no' means disable warnings
(default for non-developer builds).])],
[case $enableval in
yes|no|warn-only) ;;
*) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
esac
gl_gcc_warnings=$enableval],
[# By default, use 'warn-only' if it looks like the invoker of 'configure'
# is a developer as opposed to a builder. This is most likely true
# if GCC is recent enough and there is a .git directory or file;
# however, if there is also a .tarball-version file it is probably
# just a release imported into Git for patch management.
gl_gcc_warnings=no
if test -e "$srcdir"/.git && test ! -f "$srcdir"/.tarball-version; then
gl_GCC_VERSION_IFELSE([5], [3], [gl_gcc_warnings=warn-only])
fi])
AC_ARG_ENABLE([check-lisp-object-type],
[AS_HELP_STRING([--enable-check-lisp-object-type],
[Enable compile time checks for the Lisp_Object data type,
which can catch some bugs during development.])])
if test "$enable_check_lisp_object_type" = yes; then
AC_DEFINE([CHECK_LISP_OBJECT_TYPE], 1,
[Define to enable compile-time checks for the Lisp_Object data type.])
fi
# clang is unduly picky about some things.
AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#ifndef __clang__
error "not clang";
#endif
]])],
[emacs_cv_clang=yes],
[emacs_cv_clang=no])])
WERROR_CFLAGS=
# When compiling with GCC, prefer -isystem to -I when including system
# include files, to avoid generating useless diagnostics for the files.
AS_IF([test $gl_gcc_warnings = no],