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mc/configure.ac

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dnl
dnl Configure.in file for the Midnight Commander
dnl
dnl 2.64 is required at least for m4_esyscmd_s()
AC_PREREQ(2.64)
AC_INIT([GNU Midnight Commander], m4_esyscmd_s([./version.sh .]),
[https://www.midnight-commander.org/wiki/NewTicket], [mc],
[https://www.midnight-commander.org/])
m4_pattern_forbid(MC_)
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR(config)
AC_CONFIG_SRCDIR(src/main.c)
AC_CONFIG_HEADERS(config.h)
dnl Apply "no-define" to avoid defining the VERSION macro in config.h
AM_INIT_AUTOMAKE([no-define])
dnl PACKAGE macro isn't defined if "no-define" is applied
AC_DEFINE([PACKAGE], ["mc"], [Name of package])
dnl Enable silent rules by default (if yes)
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
mc_VERSION
AM_MAINTAINER_MODE
AC_CANONICAL_HOST
AC_USE_SYSTEM_EXTENSIONS
dnl ############################################################################
dnl Check for compiler
dnl ############################################################################
dnl This should be checked before toolchain macros, otherwise they will remember
dnl that ar cannot be found and linking via libtool will fail at a later stage
AC_CHECK_TOOLS([AR], [ar gar])
AC_PROG_CC
AM_PROG_CC_C_O
mc_CHECK_CFLAGS
CFLAGS_OPTS=""
if test "x$CFLAGS" = "x"; then
CFLAGS_OPTS=" -O2 "
fi
if test x$USE_MAINTAINER_MODE = xyes; then
CFLAGS_OPTS="-g3 -O -ggdb"
AC_DEFINE(USE_MAINTAINER_MODE, 1, [Use maintainer mode])
fi
AC_ARG_ENABLE([werror],
AS_HELP_STRING([--enable-werror], [Handle all compiler warnings as errors]))
if test "x$enable_werror" = xyes; then
AX_APPEND_COMPILE_FLAGS([-Werror], [mc_configured_cflags])
fi
dnl Compiler can generate warnings for unrecognized flags added to CFLAGS
dnl which causes attribute checks to fail
ax_gcc_func_attribute_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS=
AX_GCC_FUNC_ATTRIBUTE([fallthrough])
_AC_LANG_PREFIX[]FLAGS=$ax_gcc_func_attribute_save_flags
unset ax_gcc_func_attribute_save_flags
LT_INIT
dnl ############################################################################
dnl Check for programs
dnl ############################################################################
AC_PROG_SED
PKG_PROG_PKG_CONFIG
AC_PROG_INSTALL
AC_PROG_LN_S
dnl See also the "OS specific stuff" section below.
dnl Check nroff and the options it supports
AC_CHECK_PROG(HAVE_nroff, nroff, true, false)
dnl Default values
MANDOC=-man
MAN_FLAGS=
if $HAVE_nroff; then
AC_MSG_CHECKING([for manual formatting macros])
AC_CACHE_VAL(mc_cv_mandoc, [
nroff -mandoc < /dev/null > /dev/null 2>&1
if test $? = 0; then
mc_cv_mandoc=-mandoc
else
mc_cv_mandoc=-man
fi
])
MANDOC=$mc_cv_mandoc
AC_MSG_RESULT([$MANDOC])
AC_MSG_CHECKING([for option to disable ANSI color in manuals])
AC_CACHE_VAL(mc_cv_man_nocolor, [
nroff -c < /dev/null > /dev/null 2>&1
if test $? = 0; then
mc_cv_man_nocolor=-c
else
mc_cv_man_nocolor=
fi
])
MAN_FLAGS=$mc_cv_man_nocolor
AC_MSG_RESULT([${MAN_NOCOLOR-none}])
AC_MSG_CHECKING([if nroff accepts -Tlatin1 or -Tascii])
AC_CACHE_VAL(mc_cv_nroff_tascii, [
mc_cv_nroff_tascii=
nroff -Tlatin1 < /dev/null > /dev/null 2>&1 /dev/null
if test $? = 0; then
mc_cv_nroff_tascii=-Tlatin1
else
nroff -Tascii < /dev/null > /dev/null 2>&1 /dev/null
if test $? = 0; then
mc_cv_nroff_tascii=-Tascii
fi
fi
])
AC_MSG_RESULT([${mc_cv_nroff_tascii-no}])
MAN_FLAGS="$MAN_FLAGS $mc_cv_nroff_tascii"
fi
AC_SUBST(MANDOC)
AC_SUBST(MAN_FLAGS)
dnl Check for -z, -b, -L, and -S options to file
AC_CHECK_PROG(HAVE_FILECMD, file, true, false)
if $HAVE_FILECMD; then
dnl Don't use the file command if it doesn't accept the -z option
AC_MSG_CHECKING([for -z option to file command])
AC_CACHE_VAL(mc_cv_file_z, [
file -z . > /dev/null 2>&1
if test $? = 0; then
mc_cv_file_z=yes
else
mc_cv_file_z=no
fi
])
AC_MSG_RESULT([$mc_cv_file_z])
if test x$mc_cv_file_z = xyes; then
AC_DEFINE(USE_FILE_CMD, 1, [Define if the file command accepts the -z option])
else
AC_MSG_WARN([The file command doesn't accept the -z option and will not be used])
fi
if test x$mc_cv_file_z = xyes; then
dnl file is used; check -b, -L and -S options
AC_MSG_CHECKING([for -b option to file command])
AC_CACHE_VAL(mc_cv_file_b, [
file -b . > /dev/null 2>&1
if test $? = 0; then
mc_cv_file_b=yes
else
mc_cv_file_b=no
fi
])
AC_MSG_RESULT([$mc_cv_file_b])
if test x$mc_cv_file_b = xyes; then
AC_DEFINE(FILE_B, "-b ", [Define if the file command accepts the -b option])
fi
AC_MSG_CHECKING([for -L option to file command])
AC_CACHE_VAL(mc_cv_file_L, [
file -L . > /dev/null 2>&1
if test $? = 0; then
mc_cv_file_L=yes
else
mc_cv_file_L=no
fi
])
AC_MSG_RESULT([$mc_cv_file_L])
if test x$mc_cv_file_L = xyes; then
AC_DEFINE(FILE_L, "-L ", [Define if the file command accepts the -L option])
else
AC_DEFINE(FILE_L, "", [Define if the file command accepts the -L option])
fi
dnl The file command accepts the -S option since 5.33
AC_MSG_CHECKING([for -S option to file command])
AC_CACHE_VAL(mc_cv_file_S, [
file -S . > /dev/null 2>&1
if test $? = 0; then
mc_cv_file_S=yes
else
mc_cv_file_S=no
fi
])
AC_MSG_RESULT([$mc_cv_file_S])
if test x$mc_cv_file_S = xyes; then
AC_DEFINE(FILE_S, "-S ", [Define if file command accepts the -S option])
else
AC_DEFINE(FILE_S, "", [Define if file command accepts the -S option])
fi
fi
fi
dnl Only list browsers here that can be run in background (i.e. with `&')
AC_CHECK_PROGS(X11_WWW, [gnome-moz-remote mozilla firefox konqueror opera])
dnl ############################################################################
dnl Check for other tools
dnl ############################################################################
AC_CHECK_TOOLS([INDENT], [gindent indent])
mc_UNIT_TESTS
dnl ############################################################################
dnl Check for main libraries
dnl ############################################################################
mc_CHECK_GLIB
mc_G_MODULE_SUPPORTED
mc_WITH_SCREEN
mc_CHECK_SEARCH_TYPE
dnl X11 support. Used to read keyboard modifiers when running under X11.
mc_WITH_X
dnl ############################################################################
dnl Check for header files
dnl ############################################################################
AC_CHECK_HEADERS([string.h memory.h limits.h malloc.h \
utime.h sys/statfs.h sys/vfs.h \
sys/select.h sys/ioctl.h stropts.h arpa/inet.h \
sys/socket.h])
dnl This macro is redefined in m4.include/gnulib/sys_types_h.m4
dnl to work around a buggy version in autoconf <= 2.69.
AC_HEADER_MAJOR
dnl ############################################################################
dnl Check for types
dnl ############################################################################
dnl Check largefile before type sizeof checks
AC_SYS_LARGEFILE
AC_CHECK_SIZEOF(long)
AC_TYPE_UINTMAX_T
AC_CHECK_SIZEOF(uintmax_t)
AC_TYPE_OFF_T
AC_CHECK_SIZEOF(off_t)
AC_TYPE_MODE_T
gl_PROMOTED_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_UID_T
AC_CHECK_TYPE([major_t], [], [AC_DEFINE([major_t], [int], [Type of major device numbers.])])
AC_CHECK_TYPE([minor_t], [], [AC_DEFINE([minor_t], [int], [Type of minor device numbers.])])
AC_STRUCT_ST_BLOCKS
AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_rdev, struct stat.st_mtim, struct stat.st_mtimespec, struct stat.st_mtimensec])
gl_STAT_SIZE
AH_TEMPLATE([sig_atomic_t],
[/* Define to `int' if <signal.h> doesn't define.])
AH_TEMPLATE([SIG_ATOMIC_VOLATILE_T],
[Some systems declare sig_atomic_t as volatile, some others -- no.
This define will have value `sig_atomic_t' or
`volatile sig_atomic_t' accordingly.])
AC_MSG_CHECKING(for sig_atomic_t in signal.h)
AC_EGREP_HEADER(sig_atomic_t,signal.h,
[
ac_cv_type_sig_atomic_t=yes;
AC_EGREP_HEADER(volatile.*sig_atomic_t,
signal.h,
[
is_sig_atomic_t_volatile=yes;
AC_MSG_RESULT([yes, volatile])
],
[
is_sig_atomic_t_volatile=no;
AC_MSG_RESULT([yes, non volatile])
])
],
[
AC_MSG_RESULT(no)
AC_CHECK_TYPE(sig_atomic_t, int)
is_sig_atomic_t_volatile=no
])
if test $is_sig_atomic_t_volatile = 'yes'
then
AC_DEFINE(SIG_ATOMIC_VOLATILE_T, sig_atomic_t)
else
AC_DEFINE(SIG_ATOMIC_VOLATILE_T, [volatile sig_atomic_t])
fi
dnl ############################################################################
dnl Check for functions
dnl ############################################################################
AC_CHECK_FUNCS([\
strverscmp \
strncasecmp \
realpath
])
dnl getpt is a GNU Extension (glibc 2.1.x)
AC_CHECK_FUNCS(posix_openpt, , [AC_CHECK_FUNCS(getpt)])
AC_CHECK_FUNCS(grantpt, , [AC_CHECK_LIB(pt, grantpt)])
dnl replacing lstat with statlstat on sco makes it more portable between
dnl sco clones
AC_CHECK_FUNCS(statlstat)
mc_GET_FS_INFO
dnl ############################################################################
dnl Internationalization
dnl ############################################################################
AC_CHECK_FUNCS([setlocale])
AM_GNU_GETTEXT([external], [need-ngettext])
AM_GNU_GETTEXT_VERSION([0.18.2])
mc_I18N
dnl ############################################################################
dnl OS specific stuff
dnl ############################################################################
case $host_os in
*os400)
AC_PATH_PROG([PERL], [perl], [/QOpenSys/pkgs/bin/perl])
AC_PATH_PROG([PERL_FOR_BUILD], [perl], [/QOpenSys/pkgs/bin/perl])
AC_PATH_PROG([PYTHON], [python], [/QOpenSys/pkgs/bin/python2])
AC_PATH_PROG([RUBY], [ruby], [/QOpenSys/pkgs/bin/ruby])
;;
*)
AC_PATH_PROG([PERL], [perl], [/usr/bin/perl])
AC_PATH_PROG([PERL_FOR_BUILD], [perl], [/usr/bin/perl])
AC_PATH_PROG([PYTHON], [python], [/usr/bin/python])
AC_PATH_PROG([RUBY], [ruby], [/usr/bin/ruby])
esac
case $host_os in
aux*)
# A/UX
LIBS="$LIBS -lposix"
AC_DEFINE(_POSIX_SOURCE)
;;
esac
dnl If running under AIX, AC_AIX does not tell us that
AC_MSG_CHECKING([for AIX defines])
AC_EGREP_CPP([yes],
[
#if defined(AIX) || defined(_AIX) || defined(__aix__) || defined(aix)
yes
#endif
],
[
AC_DEFINE(IS_AIX, 1, [Define if compiling for AIX])
AC_MSG_RESULT(yes)
],
[
AC_MSG_RESULT(no)
])
dnl utimensat is supported since glibc 2.6 and specified in POSIX.1-2008
AC_CHECK_FUNCS([utimensat])
case $host_os in
*os400)
AC_DEFINE([PTY_ZEROREAD], [1], [read(1) can return 0 for a non-closed fd])
esac
dnl Check linux/fs.h for FICLONE to support BTRFS's file clone operation
case $host_os in
linux*)
AC_CHECK_HEADERS([linux/fs.h])
esac
dnl Check if the OS is supported by the console saver.
cons_saver=""
case $host_os in
linux*)
cons_saver=yes
esac
dnl Check for gpm mouse support (Linux only)
mouse_lib="xterm only"
AC_ARG_WITH([gpm-mouse],
AS_HELP_STRING([--with-gpm-mouse], [Compile with gpm mouse support (Linux only) @<:@yes if found@:>@]))
case $host_os in
linux*)
if test x$with_gpm_mouse != xno; then
AC_CHECK_LIB(gpm, Gpm_Repeat,
[AC_DEFINE(HAVE_LIBGPM, 1,
[Define to enable gpm mouse support on Linux])
mouse_lib="gpm and xterm"
MCLIBS="$MCLIBS -lgpm"],
if test "x$with_gpm_mouse" = "xyes"; then
[AC_MSG_ERROR([libgpm is missing or older than 0.18])]
else
[AC_MSG_WARN([libgpm is missing or older than 0.18])]
fi
)
fi
;;
esac
dnl ############################################################################
dnl libmc
dnl ############################################################################
LIBMC_VERSION="0.0.1"
LIBMC_RELEASE="1"
AC_SUBST(LIBMC_VERSION)
AC_SUBST(LIBMC_RELEASE)
AC_ARG_ENABLE([mclib],
[AS_HELP_STRING([--enable-mclib], [Compile shared library libmc.so @<:@no@:>@])],
[
if test "x$enableval" = "xno" ; then
enable_mclib=no
else
if test "x$enable_shared" = "xno" ; then
AC_MSG_WARN([Build of shared library is disabled. Specify --enable-shared first])
enable_mclib=no
else
enable_mclib=yes
fi
fi
],
[enable_mclib=no])
AM_CONDITIONAL([ENABLE_MCLIB], [test x$enable_mclib = xyes])
dnl ############################################################################
dnl MC options
dnl ############################################################################
mc_ASSERT
mc_WITH_INTERNAL_EDIT
dnl Diff viewer support.
AC_ARG_WITH([diff_viewer],
AS_HELP_STRING([--with-diff-viewer], [Compile with diff viewer @<:@yes@:>@]))
if test x$with_diff_viewer != xno; then
AC_DEFINE(USE_DIFF_VIEW, 1, [Define to enable diff viewer])
use_diff=yes
diff_msg="yes"
AC_MSG_NOTICE([using diff viewer])
else
diff_msg="no"
fi
mc_SUBSHELL
mc_BACKGROUND
mc_EXT2FS_ATTR
mc_VFS_CHECKS
dnl ############################################################################
dnl Directories
dnl ############################################################################
dnl ${prefix} and ${exec_prefix} are undefined here if --prefix is not used in command line
dnl Let define ${prefix} and ${exec_prefix}
test "x$prefix" = "xNONE" && prefix="$ac_default_prefix"
test "x$exec_prefix" = "xNONE" && exec_prefix="${prefix}"
if test x${libexecdir} = x'${exec_prefix}/libexec'; then
EXTHELPERSDIR=${prefix}/libexec/${PACKAGE}/ext.d
elif test x${libexecdir} = x'${exec_prefix}/lib'; then
EXTHELPERSDIR=${prefix}/lib/${PACKAGE}/ext.d
else
EXTHELPERSDIR=${libexecdir}/${PACKAGE}/ext.d
fi
AC_SUBST(EXTHELPERSDIR)
dnl ############################################################################
dnl Documentation
dnl ############################################################################
MAN_DATE="$(LC_ALL=C date "+%B %Y")"
AC_SUBST(MAN_DATE)
dnl Determine which help translations we want to install.
ALL_DOC_LINGUAS="es hu it pl ru sr"
DOC_LINGUAS=
if test "x$USE_NLS" = xyes; then
if test -z "$LINGUAS"; then
langs="`grep -v '^#' $srcdir/po/LINGUAS`"
else
langs="$LINGUAS"
fi
else
langs=
fi
for h_lang in $ALL_DOC_LINGUAS; do
for lang in $langs; do
if test "$lang" = "$h_lang"; then
DOC_LINGUAS="$DOC_LINGUAS $lang"
break
fi
done
done
AC_SUBST(DOC_LINGUAS)
DX_HTML_FEATURE(ON)
DX_CHM_FEATURE(OFF)
DX_CHI_FEATURE(OFF)
DX_MAN_FEATURE(OFF)
DX_RTF_FEATURE(OFF)
DX_XML_FEATURE(OFF)
DX_PDF_FEATURE(OFF)
DX_PS_FEATURE(OFF)
DX_INIT_DOXYGEN(mc,doxygen.cfg,devel)
dnl ############################################################################
dnl Configure results
dnl ############################################################################
CFLAGS="$mc_configured_cflags $CFLAGS_OPTS $CFLAGS"
AC_SUBST(MCLIBS)
AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(LIBS)
AM_CONDITIONAL(USE_NLS, [test x"$USE_NLS" = xyes])
AM_CONDITIONAL(USE_MAINTAINER_MODE, [test x"$USE_MAINTAINER_MODE" = xyes])
AM_CONDITIONAL(USE_SCREEN_SLANG, [test x"$with_screen" = xslang])
AM_CONDITIONAL(USE_INTERNAL_EDIT, [test x"$use_internal_edit" = xyes ])
AM_CONDITIONAL(USE_ASPELL, [test x"$enable_aspell" = xyes ])
AM_CONDITIONAL(USE_DIFF, [test -n "$use_diff"])
AM_CONDITIONAL(CHARSET, [test -n "$have_charset"])
AM_CONDITIONAL(CONS_SAVER, [test -n "$cons_saver"])
dnl Clarify do we really need GModule
AM_CONDITIONAL([HAVE_GMODULE], [test -n "$g_module_supported" && \
test x"$textmode_x11_support" = x"yes" -o x"$enable_aspell" = x"yes"])
AC_ARG_ENABLE([configure-args],
AS_HELP_STRING([--enable-configure-args], [Embed ./configure arguments into binaries]))
if test "x$enable_configure_args" != xno; then
AC_DEFINE([ENABLE_CONFIGURE_ARGS], 1, [Define to enable showing configure arguments in help])
AC_DEFINE_UNQUOTED([MC_CONFIGURE_ARGS], ["$ac_configure_args"], [MC configure arguments])
fi
AC_CONFIG_FILES(
[
src/man2hlp/man2hlp
],
[
chmod +x src/man2hlp/man2hlp
])
AC_CONFIG_FILES([
Makefile
contrib/Makefile
misc/Makefile
misc/mc.charsets
misc/mc.menu
misc/mcedit.menu
misc/skins/Makefile
misc/ext.d/Makefile
misc/ext.d/doc.sh
misc/ext.d/misc.sh
misc/ext.d/text.sh
misc/ext.d/web.sh
misc/macros.d/Makefile
misc/mc.ext.ini
src/Makefile
src/consaver/Makefile
src/editor/Makefile
src/man2hlp/Makefile
src/subshell/Makefile
src/viewer/Makefile
src/diffviewer/Makefile
src/filemanager/Makefile
src/vfs/Makefile
src/vfs/cpio/Makefile
src/vfs/extfs/Makefile
src/vfs/extfs/helpers/Makefile
src/vfs/extfs/helpers/a+
src/vfs/extfs/helpers/apt+
src/vfs/extfs/helpers/audio
src/vfs/extfs/helpers/deb
src/vfs/extfs/helpers/deba
src/vfs/extfs/helpers/debd
src/vfs/extfs/helpers/dpkg+
src/vfs/extfs/helpers/iso9660
src/vfs/extfs/helpers/hp48+
src/vfs/extfs/helpers/lslR
src/vfs/extfs/helpers/mailfs
src/vfs/extfs/helpers/patchfs
src/vfs/extfs/helpers/rpms+
src/vfs/extfs/helpers/s3+
src/vfs/extfs/helpers/uace
src/vfs/extfs/helpers/ualz
src/vfs/extfs/helpers/uar
src/vfs/extfs/helpers/uarc
src/vfs/extfs/helpers/uarj
src/vfs/extfs/helpers/ucab
src/vfs/extfs/helpers/uha
src/vfs/extfs/helpers/ulha
src/vfs/extfs/helpers/ulib
src/vfs/extfs/helpers/unar
src/vfs/extfs/helpers/urar
src/vfs/extfs/helpers/uwim
src/vfs/extfs/helpers/uzip
src/vfs/extfs/helpers/uzoo
src/vfs/shell/Makefile
src/vfs/shell/helpers/Makefile
src/vfs/ftpfs/Makefile
src/vfs/sftpfs/Makefile
src/vfs/local/Makefile
src/vfs/sfs/Makefile
src/vfs/tar/Makefile
src/vfs/undelfs/Makefile
lib/Makefile
lib/event/Makefile
lib/filehighlight/Makefile
lib/mcconfig/Makefile
lib/search/Makefile
lib/skin/Makefile
lib/strutil/Makefile
lib/tty/Makefile
lib/vfs/Makefile
lib/widget/Makefile
misc/syntax/Makefile
doc/Makefile
doc/hints/Makefile
doc/hints/l10n/Makefile
doc/man/Makefile
doc/man/es/Makefile
doc/man/hu/Makefile
doc/man/it/Makefile
doc/man/pl/Makefile
doc/man/ru/Makefile
doc/man/sr/Makefile
doc/hlp/Makefile
doc/hlp/es/Makefile
doc/hlp/hu/Makefile
doc/hlp/it/Makefile
doc/hlp/pl/Makefile
doc/hlp/ru/Makefile
doc/hlp/sr/Makefile
po/Makefile.in
])
dnl https://stackoverflow.com/questions/30897170/ac-subst-does-not-expand-variable/30932102#30932102
AC_CONFIG_FILES(
[misc/syntax/Syntax], [${SED-sed} -e "s%\${prefix}%$PREFIX%" misc/syntax/Syntax > misc/syntax/Syntax.tmp && \
mv -f misc/syntax/Syntax.tmp misc/syntax/Syntax], [export PREFIX=$prefix]
)
AC_CONFIG_FILES([
tests/Makefile
tests/lib/Makefile
tests/lib/mcconfig/Makefile
tests/lib/search/Makefile
tests/lib/strutil/Makefile
tests/lib/vfs/Makefile
tests/lib/widget/Makefile
tests/src/Makefile
tests/src/filemanager/Makefile
tests/src/editor/Makefile
tests/src/editor/test-data.txt
tests/src/vfs/Makefile
tests/src/vfs/extfs/Makefile
tests/src/vfs/extfs/helpers-list/Makefile
tests/src/vfs/extfs/helpers-list/data/config.sh
tests/src/vfs/extfs/helpers-list/misc/Makefile
tests/src/vfs/ftpfs/Makefile
])
AC_OUTPUT
AC_MSG_NOTICE([
Configuration:
Source code location: ${srcdir}
Compiler: ${CC}
Compiler flags: ${CFLAGS}
Assertions: ${enable_assert}
Unit tests: ${tests_msg}
File system: ${vfs_type}
${vfs_flags}
Screen library: ${screen_msg}
Mouse support: ${mouse_lib}
X11 events support: ${textmode_x11_support}
With subshell support: ${subshell}
With background operations: ${enable_background}
With ext2fs attributes support: ${ext2fs_attr_msg}
Internal editor: ${edit_msg}
Diff viewer: ${diff_msg}
Support for charset: ${charset_msg}
Search type: ${SEARCH_TYPE}
])
dnl option checking is disable by default due to AC_CONFIG_SUBDIRS
dnl we enable it back for top-level ./configure
if test -n "$ac_unrecognized_opts"; then
case $enable_option_checking in
fatal) AC_MSG_ERROR([unrecognized options: $ac_unrecognized_opts]) ;;
*) AC_MSG_WARN( [unrecognized options: $ac_unrecognized_opts]) ;;
esac
fi
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