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configure.in
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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, 1999-2012 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 <http://www.gnu.org/licenses/>.
AC_PREREQ(2.65)
AC_INIT(emacs, 24.1.50)
AC_CONFIG_HEADER(src/config.h:src/config.in)
AC_CONFIG_SRCDIR(src/lisp.h)
AC_CONFIG_AUX_DIR(build-aux)
AM_INIT_AUTOMAKE
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'
leimdir='${datadir}/emacs/${version}/leim'
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
lisppath='${locallisppath}:${lispdir}:${datadir}/emacs/${version}/leim'
etcdir='${datadir}/emacs/${version}/etc'
archlibdir='${libexecdir}/emacs/${version}/${configuration}'
docdir='${datadir}/emacs/${version}/etc'
gamedir='${localstatedir}/games/emacs'
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_ON(NAME, HELP-STRING)
dnl Create a new --with option that defaults to being enabled. NAME
dnl 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_$1], [[^0-9a-z]], [_])=yes])dnl
])dnl
OPTION_DEFAULT_ON([pop],[don't support POP mail retrieval with movemail])
if test "$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([mmdf],[support MMDF mailboxes])
if test "$with_mmdf" != no; then
AC_DEFINE(MAIL_USE_MMDF, 1, [Define to support MMDF mailboxes in movemail.])
fi
OPTION_DEFAULT_OFF([mail-unlink],[unlink, rather than empty, mail spool after reading])
if test "$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, ["$withval"], [String giving fallback POP mail host.]))
OPTION_DEFAULT_ON([sound],[don't compile with sound support])
OPTION_DEFAULT_ON([sync-input],[process async input synchronously])
if test "$with_sync_input" = yes; then
AC_DEFINE(SYNC_INPUT, 1, [Process async input synchronously.])
fi
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 path 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, gtk3, lucid or athena, motif, no)])],
[ case "${withval}" in
y | ye | yes ) val=gtk ;;
n | no ) val=no ;;
l | lu | luc | luci | lucid ) val=lucid ;;
a | at | ath | athe | athen | athena ) val=athena ;;
m | mo | mot | moti | motif ) val=motif ;;
g | gt | gtk ) val=gtk ;;
gtk3 ) val=gtk3 ;;
* )
AC_MSG_ERROR([`--with-x-toolkit=$withval' is invalid;
this option's value should be `yes', `no', `lucid', `athena', `motif', `gtk' or
`gtk3'. `yes' and `gtk' are synonyms. `athena' and `lucid' are synonyms.])
;;
esac
with_x_toolkit=$val
])
OPTION_DEFAULT_OFF([wide-int], [prefer wide Emacs integers (typically 62-bit)])
if test "$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.
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([xml2],[don't compile with XML parsing support])
OPTION_DEFAULT_ON([imagemagick],[don't compile with ImageMagick image support])
OPTION_DEFAULT_ON([xft],[don't use XFT for anti aliased fonts])
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 or Xaw3d scroll bars])
OPTION_DEFAULT_ON([xaw3d],[don't use Xaw3d])
OPTION_DEFAULT_ON([xim],[don't use X11 XIM])
OPTION_DEFAULT_OFF([ns],[use NeXTstep (Cocoa or GNUstep) windowing system])
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])
OPTION_DEFAULT_ON([gconf],[don't compile with GConf support])
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])
## For the times when you want to build Emacs but don't have
## a suitable makeinfo, and can live without the manuals.
dnl http://lists.gnu.org/archive/html/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-info],[don't compress the installed Info pages])
if test $with_compress_info = yes; then
GZIP_INFO=yes
else
GZIP_INFO=
fi
AC_SUBST(GZIP_INFO)
AC_ARG_WITH([pkg-config-prog],dnl
[AS_HELP_STRING([--with-pkg-config-prog=PATH],
[path to pkg-config for finding GTK and librsvg])])
if test "X${with_pkg_config_prog}" != X; then
if test "${with_pkg_config_prog}" != yes; then
PKG_CONFIG="${with_pkg_config_prog}"
fi
fi
CRT_DIR=
AC_ARG_WITH([crt-dir],dnl
[AS_HELP_STRING([--with-crt-dir=DIR],[directory containing crtn.o etc.
The default is /usr/lib, or /usr/lib64 on some platforms.])])
CRT_DIR="${with_crt_dir}"
AC_ARG_WITH(gameuser,dnl
[AS_HELP_STRING([--with-gameuser=USER],[user for shared game score files])])
test "X${with_gameuser}" != X && test "${with_gameuser}" != yes \
&& gameuser="${with_gameuser}"
test "X$gameuser" = X && gameuser=games
AC_ARG_WITH([gnustep-conf],dnl
[AS_HELP_STRING([--with-gnustep-conf=PATH],[path to GNUstep.conf; 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)
AC_ARG_ENABLE(asserts,
[AS_HELP_STRING([--enable-asserts], [compile code with asserts enabled])],
USE_XASSERTS=$enableval,
USE_XASSERTS=no)
AC_ARG_ENABLE(locallisppath,
[AS_HELP_STRING([--enable-locallisppath=PATH],
[directories Emacs should search for lisp files specific
to this site])],
if test "${enableval}" = "no"; then
locallisppath=
elif test "${enableval}" != "yes"; then
locallisppath=${enableval}
fi)
AC_ARG_ENABLE(checking,
[AS_HELP_STRING([--enable-checking@<:@=LIST@:>@],
[enable expensive run-time checks. With LIST,
enable only specific categories of checks.
Categories are: all,yes,no.
Flags are: stringbytes, stringoverrun, stringfreelist,
xmallocoverrun, conslist])],
[ac_checking_flags="${enableval}"],[])
IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="$IFS,"
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= ;
ac_gc_check_stringbytes= ;
ac_gc_check_string_overrun= ;
ac_gc_check_string_free_list= ;
ac_xmalloc_overrun= ;
ac_gc_check_cons_list= ;;
all) ac_enable_checking=1 ;
ac_gc_check_stringbytes=1 ;
ac_gc_check_string_overrun=1 ;
ac_gc_check_string_free_list=1 ;
ac_xmalloc_overrun=1 ;
ac_gc_check_cons_list=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 ;;
xmallocoverrun) ac_xmalloc_overrun=1 ;;
conslist) ac_gc_check_cons_list=1 ;;
*) AC_MSG_ERROR(unknown check category $check) ;;
esac
done
IFS="$ac_save_IFS"
if test x$ac_enable_checking != x ; then
AC_DEFINE(ENABLE_CHECKING, 1,
[Enable expensive run-time checking of data types?])
fi
if test x$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$ac_xmalloc_overrun != x ; then
AC_DEFINE(XMALLOC_OVERRUN_CHECK, 1,
[Define this to check for malloc buffer overrun.])
fi
if test x$ac_gc_check_cons_list != x ; then
AC_DEFINE(GC_CHECK_CONS_LIST, 1,
[Define this to check for errors in cons list.])
fi
AC_ARG_ENABLE(use-lisp-union-type,
[AS_HELP_STRING([--enable-use-lisp-union-type],
[use a union for the Lisp_Object data type.
This is only useful for development for catching certain types of bugs.])],
if test "${enableval}" != "no"; then
AC_DEFINE(USE_LISP_UNION_TYPE, 1,
[Define this to use a lisp union for the Lisp_Object data type.])
fi)
AC_ARG_ENABLE(profiling,
[AS_HELP_STRING([--enable-profiling],
[build emacs with profiling support.
This might not work on all platforms])],
[ac_enable_profiling="${enableval}"],[])
if test x$ac_enable_profiling != x ; then
PROFILING_CFLAGS="-DPROFILING=1 -pg"
else
PROFILING_CFLAGS=
fi
AC_SUBST(PROFILING_CFLAGS)
AC_ARG_ENABLE(autodepend,
[AS_HELP_STRING([--enable-autodepend],
[automatically generate dependencies to .h-files.
Requires GNU Make and Gcc. Enabled if GNU Make and Gcc is
found])],
[ac_enable_autodepend="${enableval}"],[ac_enable_autodepend=yes])
#### Make srcdir absolute, if it isn't already. It's important to
#### avoid running the path through pwd unnecessarily, since pwd can
#### give you automounter prefixes, which can go away. We do all this
#### so Emacs can find its files when run uninstalled.
## Make sure CDPATH doesn't affect cd (in case PWD is relative).
unset CDPATH
case "${srcdir}" in
/* ) ;;
. )
## We may be able to use the $PWD environment variable to make this
## absolute. But sometimes PWD is inaccurate.
## Note: we used to use ${PWD} at the end instead of `pwd`,
## but that tested only for a well-formed and valid PWD,
## it did not object when PWD was well-formed and valid but just wrong.
if test ".${PWD}" != "." && test ".`(cd ${PWD} ; sh -c pwd)`" = ".`pwd`" ;
then
srcdir="$PWD"
else
srcdir="`(cd ${srcdir}; pwd)`"
fi
;;
* ) srcdir="`(cd ${srcdir}; pwd)`" ;;
esac
#### Given the configuration name, set opsysfile to the
#### name of s/*.h file we should use.
### Canonicalize the configuration name.
AC_CANONICAL_HOST
canonical=$host
configuration=${host_alias-${build_alias-$host}}
dnl This used to use changequote, but, apart from `changequote is evil'
dnl per the autoconf manual, we can speed up autoconf somewhat by quoting
dnl the great gob of text. Thus it's not processed for possible expansion.
dnl Just make sure the brackets remain balanced.
dnl
dnl Since Emacs can't find matching pairs of quotes, boundaries are
dnl indicated by comments.
dnl quotation begins
[
### If you add support for a new configuration, add code to this
### switch statement to recognize your configuration name and select
### the appropriate operating system file.
### You would hope that you could choose an s/*.h
### file based on the operating system portion. However, it turns out
### that each s/*.h file is pretty manufacturer-specific.
### So we basically have to have a special case for each
### configuration name.
###
### As far as handling version numbers on operating systems is
### concerned, make sure things will fail in a fixable way. If
### /etc/MACHINES doesn't say anything about version numbers, be
### prepared to handle anything reasonably. If version numbers
### matter, be sure /etc/MACHINES says something about it.
opsys='' unported=no
case "${canonical}" in
## GNU/Linux and similar ports
*-*-linux* )
opsys=gnu-linux
;;
## FreeBSD ports
*-*-freebsd* )
opsys=freebsd
;;
## FreeBSD kernel + glibc based userland
*-*-kfreebsd*gnu* )
opsys=gnu-kfreebsd
;;
## NetBSD ports
*-*-netbsd* )
opsys=netbsd
;;
## OpenBSD ports
*-*-openbsd* )
opsys=openbsd
;;
## Apple Darwin / Mac OS X
*-apple-darwin* )
case "${canonical}" in
i[3456]86-* ) ;;
powerpc-* ) ;;
x86_64-* ) ;;
* ) unported=yes ;;
esac
opsys=darwin
## Use fink packages if available.
## FIXME find a better way to do this: http://debbugs.gnu.org/11507
## if test -d /sw/include && test -d /sw/lib; then
## GCC_TEST_OPTIONS="-I/sw/include -L/sw/lib"
## NON_GCC_TEST_OPTIONS=${GCC_TEST_OPTIONS}
## fi
;;
## 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 $CFLAGS"
;;
## IBM machines
rs6000-ibm-aix4.[23]* )
opsys=aix4-2
;;
powerpc-ibm-aix4.[23]* )
opsys=aix4-2
;;
rs6000-ibm-aix[56]* )
opsys=aix4-2
;;
powerpc-ibm-aix[56]* )
opsys=aix4-2
;;
## Silicon Graphics machines
## Iris 4D
mips-sgi-irix6.5 )
opsys=irix6-5
# Without defining _LANGUAGE_C, things get masked out in the headers
# so that, for instance, grepping for `free' in stdlib.h fails and
# AC_HEADER_STD_C fails. (MIPSPro 7.2.1.2m compilers, Irix 6.5.3m).
NON_GCC_TEST_OPTIONS="-D_LANGUAGE_C"
;;
## Suns
*-sun-solaris* \
| i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
| x86_64-*-solaris2* | x86_64-*-sunos5*)
case "${canonical}" in
i[3456]86-*-* ) ;;
amd64-*-*|x86_64-*-*) ;;
sparc* ) ;;
* ) unported=yes ;;
esac
case "${canonical}" in
*-sunos5.6* | *-solaris2.6* )
opsys=sol2-6
RANLIB="ar -ts"
;;
*-sunos5.[7-9]* | *-solaris2.[7-9]* )
opsys=sol2-6
emacs_check_sunpro_c=yes
;;
*-sunos5* | *-solaris* )
opsys=sol2-10
emacs_check_sunpro_c=yes
;;
esac
## Watch out for a compiler that we know will not work.
case "${canonical}" in
*-solaris* | *-sunos5* )
if [ "x$CC" = x/usr/ucb/cc ]; then
## /usr/ucb/cc doesn't work;
## we should find some other compiler that does work.
unset CC
fi
;;
*) ;;
esac
;;
## Intel 386 machines where we don't care about the manufacturer.
i[3456]86-*-* )
case "${canonical}" in
*-cygwin ) opsys=cygwin ;;
*-darwin* ) opsys=darwin ;;
*-sysv4.2uw* ) opsys=unixware ;;
*-sysv5uw* ) opsys=unixware ;;
*-sysv5OpenUNIX* ) opsys=unixware ;;
## 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 $unported = yes; then
AC_MSG_ERROR([Emacs hasn't been ported to `${canonical}' systems.
Check `etc/MACHINES' for recognized configuration names.])
fi
opsysfile="s/${opsys}.h"
#### Choose a compiler.
dnl Sets GCC=yes if using gcc.
AC_PROG_CC
AM_PROG_CC_C_O
if test x$GCC = xyes; then
test "x$GCC_TEST_OPTIONS" != x && CC="$CC $GCC_TEST_OPTIONS"
else
test "x$NON_GCC_TEST_OPTIONS" != x && CC="$CC $NON_GCC_TEST_OPTIONS"
fi
# Initialize gnulib right after choosing the compiler.
gl_EARLY
AC_ARG_ENABLE([gcc-warnings],
[AS_HELP_STRING([--enable-gcc-warnings],
[turn on lots of GCC warnings (for developers)])],
[case $enableval in
yes|no) ;;
*) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
esac
gl_gcc_warnings=$enableval],
[gl_gcc_warnings=no]
)
# 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], [$4])
]
)
# When compiling with GCC, prefer -isystem to -I when including system
# include files, to avoid generating useless diagnostics for the files.
if test "$gl_gcc_warnings" != yes; then
isystem='-I'
else
isystem='-isystem '
# This, $nw, is the list of warnings we disable.
nw=
case $with_x_toolkit in
lucid | athena | motif)
# Old toolkits mishandle 'const'.
nw="$nw -Wwrite-strings"
;;
*)
gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
;;
esac
AC_SUBST([WERROR_CFLAGS])
nw="$nw -Waggregate-return" # anachronistic
nw="$nw -Wlong-long" # C90 is anachronistic
nw="$nw -Wc++-compat" # We don't care about C++ compilers
nw="$nw -Wundef" # Warns on '#if GNULIB_FOO' etc in gnulib
nw="$nw -Wtraditional" # Warns on #elif which we use often
nw="$nw -Wcast-qual" # Too many warnings for now
nw="$nw -Wconversion" # Too many warnings for now
nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
nw="$nw -Wsign-conversion" # Too many warnings for now
nw="$nw -Woverlength-strings" # Not a problem these days
nw="$nw -Wtraditional-conversion" # Too many warnings for now
nw="$nw -Wpadded" # Our structs are not padded
nw="$nw -Wredundant-decls" # We regularly (re)declare getenv etc.
nw="$nw -Wlogical-op" # any use of fwrite provokes this
nw="$nw -Wformat-nonliteral" # Emacs does this a lot
nw="$nw -Wvla" # warnings in gettext.h
nw="$nw -Wnested-externs" # use of XARGMATCH/verify_function__
nw="$nw -Wswitch-enum" # Too many warnings for now
nw="$nw -Wswitch-default" # Too many warnings for now
nw="$nw -Wfloat-equal" # e.g., ftoastr.c
nw="$nw -Winline" # e.g., dispnew.c's inlining of row_equal_p
# Emacs doesn't care about shadowing; see
# <http://lists.gnu.org/archive/html/emacs-diffs/2011-11/msg00265.html>.
nw="$nw -Wshadow"
# The following lines should be removable at some point.
nw="$nw -Wstack-protector"
nw="$nw -Wstrict-overflow"
nw="$nw -Wsuggest-attribute=const"
nw="$nw -Wsuggest-attribute=pure"
gl_MANYWARN_ALL_GCC([ws])
gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
for w in $ws; do
gl_WARN_ADD([$w])
done
gl_WARN_ADD([-Wno-missing-field-initializers]) # We need this one
gl_WARN_ADD([-Wno-sign-compare]) # Too many warnings for now
gl_WARN_ADD([-Wno-type-limits]) # Too many warnings for now
gl_WARN_ADD([-Wno-switch]) # Too many warnings for now
gl_WARN_ADD([-Wno-unused-parameter]) # Too many warnings for now
gl_WARN_ADD([-Wno-format-nonliteral])
# In spite of excluding -Wlogical-op above, it is enabled, as of
# gcc 4.5.0 20090517.
gl_WARN_ADD([-Wno-logical-op])
gl_WARN_ADD([-fdiagnostics-show-option])
gl_WARN_ADD([-funit-at-a-time])
AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
AC_DEFINE([_FORTIFY_SOURCE], [2],
[enable compile-time and run-time bounds-checking, and some warnings])
AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
# We use a slightly smaller set of warning options for lib/.
# Remove the following and save the result in GNULIB_WARN_CFLAGS.
nw=
nw="$nw -Wunused-macros"
gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
AC_SUBST([GNULIB_WARN_CFLAGS])
fi
dnl Some other nice autoconf tests.
dnl These are commented out, since gl_EARLY and/or Autoconf already does them.
dnl AC_PROG_INSTALL
dnl AC_PROG_MKDIR_P
dnl if test "x$RANLIB" = x; then
dnl AC_PROG_RANLIB
dnl fi
AC_PATH_PROG(INSTALL_INFO, install-info, :,
$PATH$PATH_SEPARATOR/usr/sbin$PATH_SEPARATOR/sbin)
dnl Don't use GZIP, which is used by gzip for additional parameters.
AC_PATH_PROG(GZIP_PROG, gzip)
AC_PATH_PROG(PAXCTL, paxctl,,
[$PATH$PATH_SEPARATOR/sbin$PATH_SEPARATOR/usr/sbin])
## Need makeinfo >= 4.7 (?) to build the manuals.
AC_PATH_PROG(MAKEINFO, makeinfo, no)
dnl By this stage, configure has already checked for egrep and set EGREP,
dnl or exited with an error if no egrep was found.
if test "$MAKEINFO" != "no" && \
test x"`$MAKEINFO --version 2> /dev/null | $EGREP 'texinfo[[^0-9]]*([[1-4]][[0-9]]+|[[5-9]]|4\.[[7-9]]|4\.[[1-6]][[0-9]]+)'`" = x; then
MAKEINFO=no
fi
## Makeinfo is unusual. For a released Emacs, the manuals are
## pre-built, and not deleted by the normal clean rules. makeinfo is
## therefore in the category of "special tools" not normally required, which
## configure does not have to check for (eg autoconf itself).
## In a Bazaar checkout on the other hand, the manuals are not included.
## So makeinfo is a requirement to build from Bazaar, and configure
## should test for it as it does for any other build requirement.
## We use the presence of $srcdir/info/emacs to distinguish a release,
## with pre-built manuals, from a Bazaar checkout.
HAVE_MAKEINFO=yes
if test "$MAKEINFO" = "no"; then
MAKEINFO=makeinfo
if test "x${with_makeinfo}" = "xno"; then
HAVE_MAKEINFO=no
elif test ! -e $srcdir/info/emacs; then
AC_MSG_ERROR( [You do not seem to have makeinfo >= 4.7, and your
source tree does not seem to have pre-built manuals in the `info' directory.
Either install a suitable version of makeinfo, or re-run configure
with the `--without-makeinfo' option to build without the manuals.] )
fi
fi
AC_SUBST(HAVE_MAKEINFO)
dnl Just so that there is only a single place we need to edit.
INFO_EXT=.info
INFO_OPTS=--no-split
AC_SUBST(INFO_EXT)
AC_SUBST(INFO_OPTS)
dnl Add our options to ac_link now, after it is set up.
if test x$GCC = xyes; then
test "x$GCC_LINK_TEST_OPTIONS" != x && \
ac_link="$ac_link $GCC_LINK_TEST_OPTIONS"
else
test "x$NON_GCC_LINK_TEST_OPTIONS" != x && \
ac_link="$ac_link $NON_GCC_LINK_TEST_OPTIONS"
fi
dnl We need -znocombreloc if we're using a relatively recent GNU ld.
dnl If we can link with the flag, it shouldn't do any harm anyhow.
dnl (Don't use `-z nocombreloc' as -z takes no arg on Irix.)
dnl Treat GCC specially since it just gives a non-fatal `unrecognized option'
dnl if not built to support GNU ld.
late_LDFLAGS=$LDFLAGS
if test x$GCC = xyes; then
LDFLAGS="$LDFLAGS -Wl,-znocombreloc"
else
LDFLAGS="$LDFLAGS -znocombreloc"
fi
AC_MSG_CHECKING([for -znocombreloc])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
[AC_MSG_RESULT(yes)],
LDFLAGS=$late_LDFLAGS
[AC_MSG_RESULT(no)])
dnl The function dump-emacs will not be defined and temacs will do
dnl (load "loadup") automatically unless told otherwise.
test "x$CANNOT_DUMP" = "x" && CANNOT_DUMP=no
case "$opsys" in
your-opsys-here) CANNOT_DUMP=yes ;;
esac
test "$CANNOT_DUMP" = "yes" && \
AC_DEFINE(CANNOT_DUMP, 1, [Define if Emacs cannot be dumped on your system.])
AC_SUBST(CANNOT_DUMP)
UNEXEC_OBJ=unexelf.o
case "$opsys" in
# MSDOS uses unexcoff.o
# MSWindows uses unexw32.o
aix4-2)
UNEXEC_OBJ=unexaix.o
;;
cygwin)
UNEXEC_OBJ=unexcw.o
;;
darwin)
UNEXEC_OBJ=unexmacosx.o
;;
hpux10-20 | hpux11)
UNEXEC_OBJ=unexhp9k800.o
;;
sol2-10)
# Use the Solaris dldump() function, called from unexsol.c, to dump
# emacs, instead of the generic ELF dump code found in unexelf.c.
# The resulting binary has a complete symbol table, and is better
# for debugging and other observability tools (debuggers, pstack, etc).
#
# If you encounter a problem using dldump(), please consider sending
# a message to the OpenSolaris tools-linking mailing list:
# http://mail.opensolaris.org/mailman/listinfo/tools-linking
#
# It is likely that dldump() works with older Solaris too, but this has
# not been tested, so for now this change is for Solaris 10 or newer.
UNEXEC_OBJ=unexsol.o
;;
esac
LD_SWITCH_SYSTEM=
case "$opsys" in
freebsd)
## Let `ld' find image libs and similar things in /usr/local/lib.
## The system compiler, GCC, has apparently been modified to not
## look there, contrary to what a stock GCC would do.
### It's not our place to do this. See bug#10313#17.
### LD_SWITCH_SYSTEM=-L/usr/local/lib
:
;;
gnu-linux)
## cpp test was "ifdef __mips__", but presumably this is equivalent...
case $host_cpu in mips*) LD_SWITCH_SYSTEM="-G 0";; esac
;;
netbsd)
### It's not our place to do this. See bug#10313#17.
### LD_SWITCH_SYSTEM="-Wl,-rpath,/usr/pkg/lib -L/usr/pkg/lib -Wl,-rpath,/usr/local/lib -L/usr/local/lib"
:
;;
openbsd)
## Han Boetes <han@mijncomputer.nl> says this is necessary,
## otherwise Emacs dumps core on elf systems.
LD_SWITCH_SYSTEM="-Z"
;;
esac
AC_SUBST(LD_SWITCH_SYSTEM)
ac_link="$ac_link $LD_SWITCH_SYSTEM"
## This setting of LD_SWITCH_SYSTEM references LD_SWITCH_X_SITE_RPATH,
## which has not been defined yet. When this was handled with cpp,
## it was expanded to null when configure sourced the s/*.h file.
## Thus LD_SWITCH_SYSTEM had different values in configure and the Makefiles.
## FIXME it would be cleaner to put this in LD_SWITCH_SYSTEM_TEMACS
## (or somesuch), but because it is supposed to go at the _front_
## of LD_SWITCH_SYSTEM, we cannot do that in exactly the same way.
## Compare with the gnu-linux case below, which added to the end
## of LD_SWITCH_SYSTEM, and so can instead go at the front of
## LD_SWITCH_SYSTEM_TEMACS.
case "$opsys" in
netbsd|openbsd)
LD_SWITCH_SYSTEM="\$(LD_SWITCH_X_SITE_RPATH) $LD_SWITCH_SYSTEM" ;;
esac
C_SWITCH_MACHINE=
case $canonical in
alpha*)
AC_CHECK_DECL([__ELF__])
if test "$ac_cv_have_decl___ELF__" = "yes"; then
## With ELF, make sure that all common symbols get allocated to in the
## data section. Otherwise, the dump of temacs may miss variables in
## the shared library that have been initialized. For example, with
## GNU libc, __malloc_initialized would normally be resolved to the
## shared library's .bss section, which is fatal.
if test "x$GCC" = "xyes"; then
C_SWITCH_MACHINE="-fno-common"
else
AC_MSG_ERROR([What gives? Fix me if DEC Unix supports ELF now.])
fi
else
UNEXEC_OBJ=unexalpha.o
fi
;;
esac
AC_SUBST(C_SWITCH_MACHINE)
AC_SUBST(UNEXEC_OBJ)
C_SWITCH_SYSTEM=
## Some programs in src produce warnings saying certain subprograms
## are too complex and need a MAXMEM value greater than 2000 for
## additional optimization. --nils@exp-math.uni-essen.de
test "$opsys" = "aix4.2" && test "x$GCC" != "xyes" && \
C_SWITCH_SYSTEM="-ma -qmaxmem=4000"
## gnu-linux might need -D_BSD_SOURCE on old libc5 systems.
## It is redundant in glibc2, since we define _GNU_SOURCE.
AC_SUBST(C_SWITCH_SYSTEM)
LIBS_SYSTEM=
case "$opsys" in
## IBM's X11R5 uses -lIM and -liconv in AIX 3.2.2.
aix4-2) LIBS_SYSTEM="-lrts -lIM -liconv" ;;
freebsd) LIBS_SYSTEM="-lutil" ;;
hpux*) LIBS_SYSTEM="-l:libdld.sl" ;;
sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
## Motif needs -lgen.
unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
esac
AC_SUBST(LIBS_SYSTEM)
### Make sure subsequent tests use flags consistent with the build flags.
if test x"${OVERRIDE_CPPFLAGS}" != x; then
CPPFLAGS="${OVERRIDE_CPPFLAGS}"
else
CPPFLAGS="$C_SWITCH_SYSTEM $C_SWITCH_MACHINE $CPPFLAGS"
fi
# Suppress obsolescent Autoconf test for size_t; Emacs assumes C89 or better.
AC_DEFUN([AC_TYPE_SIZE_T])
# Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
AC_DEFUN([AC_TYPE_UID_T])
LIB_MATH=-lm
LIB_STANDARD=
START_FILES=
dnl NB do not use CRT_DIR unquoted here, since it might not be set yet.
case $opsys in
cygwin )
LIB_MATH=
START_FILES='pre-crt0.o'
;;
darwin )
## Adding -lm confuses the dynamic linker, so omit it.
LIB_MATH=
START_FILES='pre-crt0.o'
;;
freebsd )
LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtend.o $(CRT_DIR)/crtn.o'
START_FILES='pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o $(CRT_DIR)/crtbegin.o'
;;
gnu-linux | gnu-kfreebsd )
LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtn.o'
START_FILES='pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o'
;;
hpux10-20 | hpux11 )
LIB_STANDARD=-lc
START_FILES='pre-crt0.o $(CRT_DIR)/crt0.o'
;;
dnl NB this may be adjusted below.
netbsd | openbsd )
LIB_STANDARD='-lgcc -lc -lgcc $(CRT_DIR)/crtend.o'
START_FILES='pre-crt0.o $(CRT_DIR)/crt0.o $(CRT_DIR)/crtbegin.o'
;;
esac
AC_SUBST(LIB_MATH)
AC_SUBST(START_FILES)
dnl Not all platforms use crtn.o files. Check if the current one does.
crt_files=
for file in x $LIB_STANDARD $START_FILES; do
case "$file" in
*CRT_DIR*) crt_files="$crt_files `echo $file | sed -e 's|.*/||'`" ;;
esac
done
if test "x$crt_files" != x; then
## If user specified a crt-dir, use that unconditionally.
crt_gcc=no
if test "X$CRT_DIR" = "X"; then
CRT_DIR=/usr/lib # default
case "$canonical" in
x86_64-*-linux-gnu* | s390x-*-linux-gnu*)
## On x86-64 and s390x GNU/Linux distributions, the standard library
## can be in a variety of places. We only try /usr/lib64 and /usr/lib.
## For anything else (eg /usr/lib32), it is up the user to specify
## the location (bug#5655).
## Test for crtn.o, not just the directory, because sometimes the
## directory exists but does not have the relevant files (bug#1287).
## FIXME better to test for binary compatibility somehow.
test -e /usr/lib64/crtn.o && CRT_DIR=/usr/lib64
;;