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configure.ac
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#
# Copyright (c) 1999-2004 Damien Miller
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR([ssh.c])
# Check for stale configure as early as possible.
for i in $srcdir/configure.ac $srcdir/m4/*.m4; do
if test "$i" -nt "$srcdir/configure"; then
AC_MSG_ERROR([$i newer than configure, run autoreconf])
fi
done
AC_LANG([C])
AC_CONFIG_HEADERS([config.h])
AC_PROG_CC([cc gcc clang])
# XXX relax this after reimplementing logit() etc.
AC_MSG_CHECKING([if $CC supports C99-style variadic macros])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
int f(int a, int b, int c) { return a + b + c; }
#define F(a, ...) f(a, __VA_ARGS__)
]], [[return F(1, 2, -3);]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_ERROR([*** OpenSSH requires support for C99-style variadic macros]) ]
)
AC_CANONICAL_HOST
AC_C_BIGENDIAN
# Checks for programs.
AC_PROG_AWK
AC_PROG_CPP
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_EGREP
AC_PROG_MKDIR_P
AC_CHECK_TOOLS([AR], [ar])
AC_PATH_PROG([CAT], [cat])
AC_PATH_PROG([KILL], [kill])
AC_PATH_PROG([SED], [sed])
AC_PATH_PROG([TEST_MINUS_S_SH], [bash])
AC_PATH_PROG([TEST_MINUS_S_SH], [ksh])
AC_PATH_PROG([TEST_MINUS_S_SH], [sh])
AC_PATH_PROG([SH], [bash])
AC_PATH_PROG([SH], [ksh])
AC_PATH_PROG([SH], [sh])
AC_PATH_PROG([GROFF], [groff])
AC_PATH_PROG([NROFF], [nroff awf])
AC_PATH_PROG([MANDOC], [mandoc])
AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
AC_SUBST([TEST_SHELL], [sh])
dnl select manpage formatter to be used to build "cat" format pages.
if test "x$MANDOC" != "x" ; then
MANFMT="$MANDOC"
elif test "x$NROFF" != "x" ; then
MANFMT="$NROFF -mandoc"
elif test "x$GROFF" != "x" ; then
MANFMT="$GROFF -mandoc -Tascii"
else
AC_MSG_WARN([no manpage formatter found])
MANFMT="false"
fi
AC_SUBST([MANFMT])
dnl for buildpkg.sh
AC_PATH_PROG([PATH_GROUPADD_PROG], [groupadd], [groupadd],
[/usr/sbin${PATH_SEPARATOR}/etc])
AC_PATH_PROG([PATH_USERADD_PROG], [useradd], [useradd],
[/usr/sbin${PATH_SEPARATOR}/etc])
AC_CHECK_PROG([MAKE_PACKAGE_SUPPORTED], [pkgmk], [yes], [no])
if test -x /sbin/sh; then
AC_SUBST([STARTUP_SCRIPT_SHELL], [/sbin/sh])
else
AC_SUBST([STARTUP_SCRIPT_SHELL], [/bin/sh])
fi
# System features
AC_SYS_LARGEFILE
if test -z "$AR" ; then
AC_MSG_ERROR([*** 'ar' missing, please install or fix your \$PATH ***])
fi
AC_PATH_PROG([PATH_PASSWD_PROG], [passwd])
if test ! -z "$PATH_PASSWD_PROG" ; then
AC_DEFINE_UNQUOTED([_PATH_PASSWD_PROG], ["$PATH_PASSWD_PROG"],
[Full path of your "passwd" program])
fi
dnl Since autoconf doesn't support it very well, we no longer allow users to
dnl override LD, however keeping the hook here for now in case there's a use
dnl use case we overlooked and someone needs to re-enable it. Unless a good
dnl reason is found we'll be removing this in future.
LD="$CC"
AC_SUBST([LD])
AC_C_INLINE
AC_CHECK_DECL([LLONG_MAX], [have_llong_max=1], , [#include <limits.h>])
AC_CHECK_DECL([LONG_LONG_MAX], [have_long_long_max=1], , [#include <limits.h>])
AC_CHECK_DECL([RLIMIT_NPROC],
[AC_DEFINE([HAVE_RLIMIT_NPROC], [], [sys/resource.h has RLIMIT_NPROC])], , [
#include <sys/types.h>
#include <sys/resource.h>
])
AC_CHECK_DECL([PR_SET_NO_NEW_PRIVS], [have_linux_no_new_privs=1], , [
#include <sys/types.h>
#include <linux/prctl.h>
])
openssl=yes
openssl_bin=openssl
AC_ARG_WITH([openssl],
[ --without-openssl Disable use of OpenSSL; use only limited internal crypto **EXPERIMENTAL** ],
[ if test "x$withval" = "xno" ; then
openssl=no
openssl_bin=""
fi
]
)
AC_MSG_CHECKING([whether OpenSSL will be used for cryptography])
if test "x$openssl" = "xyes" ; then
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED([WITH_OPENSSL], [1], [use libcrypto for cryptography])
else
AC_MSG_RESULT([no])
fi
use_stack_protector=1
use_toolchain_hardening=1
use_retpoline=1
AC_ARG_WITH([stackprotect],
[ --without-stackprotect Don't use compiler's stack protection], [
if test "x$withval" = "xno"; then
use_stack_protector=0
fi ])
AC_ARG_WITH([hardening],
[ --without-hardening Don't use toolchain hardening flags], [
if test "x$withval" = "xno"; then
use_toolchain_hardening=0
fi ])
AC_ARG_WITH([retpoline],
[ --without-retpoline Enable retpoline spectre mitigation], [
if test "x$withval" = "xno"; then
use_retpoline=0
fi ])
# We use -Werror for the tests only so that we catch warnings like "this is
# on by default" for things like -fPIE.
AC_MSG_CHECKING([if $CC supports -Werror])
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int main(void) { return 0; }]])],
[ AC_MSG_RESULT([yes])
WERROR="-Werror"],
[ AC_MSG_RESULT([no])
WERROR="" ]
)
CFLAGS="$saved_CFLAGS"
if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
AC_MSG_CHECKING([gcc version])
GCC_VER=`$CC -v 2>&1 | $AWK '/gcc version /{print $3}'`
case "$GCC_VER" in
1.*) no_attrib_nonnull=1 ;;
2.8* | 2.9*)
no_attrib_nonnull=1
;;
2.*) no_attrib_nonnull=1 ;;
*) ;;
esac
AC_MSG_RESULT([$GCC_VER])
AC_MSG_CHECKING([clang version])
ver="`$CC -v 2>&1`"
if echo "$ver" | grep "Apple" >/dev/null; then
CLANG_VER=apple-`echo "$ver" | grep 'clang version' | \
$SED 's/.*clang version //g' | $AWK '{print $1}'`
else
CLANG_VER=`echo "$ver" | grep 'clang version' | \
$SED 's/.*clang version //g' | $AWK '{print $1}'`
fi
AC_MSG_RESULT([$CLANG_VER])
OSSH_CHECK_CFLAG_COMPILE([-pipe])
OSSH_CHECK_CFLAG_COMPILE([-Wunknown-warning-option])
OSSH_CHECK_CFLAG_COMPILE([-Wno-error=format-truncation])
OSSH_CHECK_CFLAG_COMPILE([-Qunused-arguments])
OSSH_CHECK_CFLAG_COMPILE([-Wall])
OSSH_CHECK_CFLAG_COMPILE([-Wextra])
OSSH_CHECK_CFLAG_COMPILE([-Wpointer-arith])
OSSH_CHECK_CFLAG_COMPILE([-Wuninitialized])
OSSH_CHECK_CFLAG_COMPILE([-Wsign-compare])
OSSH_CHECK_CFLAG_COMPILE([-Wformat-security])
OSSH_CHECK_CFLAG_COMPILE([-Wsizeof-pointer-memaccess])
OSSH_CHECK_CFLAG_COMPILE([-Wpointer-sign], [-Wno-pointer-sign])
OSSH_CHECK_CFLAG_COMPILE([-Wunused-parameter], [-Wno-unused-parameter])
OSSH_CHECK_CFLAG_COMPILE([-Wunused-result], [-Wno-unused-result])
OSSH_CHECK_CFLAG_COMPILE([-Wimplicit-fallthrough])
OSSH_CHECK_CFLAG_COMPILE([-Wmisleading-indentation])
OSSH_CHECK_CFLAG_COMPILE([-Wbitwise-instead-of-logical])
OSSH_CHECK_CFLAG_COMPILE([-fno-strict-aliasing])
if test "x$use_toolchain_hardening" = "x1"; then
OSSH_CHECK_CFLAG_COMPILE([-D_FORTIFY_SOURCE=2])
OSSH_CHECK_LDFLAG_LINK([-Wl,-z,relro])
OSSH_CHECK_LDFLAG_LINK([-Wl,-z,now])
OSSH_CHECK_LDFLAG_LINK([-Wl,-z,noexecstack])
# NB. -ftrapv expects certain support functions to be present in
# the compiler library (libgcc or similar) to detect integer operations
# that can overflow. We must check that the result of enabling it
# actually links. The test program compiled/linked includes a number
# of integer operations that should exercise this.
OSSH_CHECK_CFLAG_LINK([-ftrapv])
# clang 15 seems to have a bug in -fzero-call-used-regs=all. See
# https://bugzilla.mindrot.org/show_bug.cgi?id=3475 and
# https://github.com/llvm/llvm-project/issues/59242
# clang 17 has a different bug that causes an ICE when using this
# flag at all (https://bugzilla.mindrot.org/show_bug.cgi?id=3629)
case "$CLANG_VER" in
apple-15*) OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
17*) ;;
*) OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
esac
OSSH_CHECK_CFLAG_COMPILE([-ftrivial-auto-var-init=zero])
fi
if test "x$use_retpoline" = "x1"; then
OSSH_CHECK_CFLAG_COMPILE([-mretpoline]) # clang
OSSH_CHECK_LDFLAG_LINK([-Wl,-z,retpolineplt])
fi
AC_MSG_CHECKING([if $CC accepts -fno-builtin-memset])
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fno-builtin-memset"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <string.h> ]],
[[ char b[10]; memset(b, 0, sizeof(b)); ]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
CFLAGS="$saved_CFLAGS" ]
)
# -fstack-protector-all doesn't always work for some GCC versions
# and/or platforms, so we test if we can. If it's not supported
# on a given platform gcc will emit a warning so we use -Werror.
if test "x$use_stack_protector" = "x1"; then
for t in -fstack-protector-strong -fstack-protector-all \
-fstack-protector; do
AC_MSG_CHECKING([if $CC supports $t])
saved_CFLAGS="$CFLAGS"
saved_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS $t -Werror"
LDFLAGS="$LDFLAGS $t -Werror"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
]],
[[
char x[256];
snprintf(x, sizeof(x), "XXX%d", func(1));
]])],
[ AC_MSG_RESULT([yes])
CFLAGS="$saved_CFLAGS $t"
LDFLAGS="$saved_LDFLAGS $t"
AC_MSG_CHECKING([if $t works])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdio.h>
int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
]],
[[
char x[256];
snprintf(x, sizeof(x), "XXX%d", func(1));
]])],
[ AC_MSG_RESULT([yes])
break ],
[ AC_MSG_RESULT([no]) ],
[ AC_MSG_WARN([cross compiling: cannot test])
break ]
)
],
[ AC_MSG_RESULT([no]) ]
)
CFLAGS="$saved_CFLAGS"
LDFLAGS="$saved_LDFLAGS"
done
fi
if test -z "$have_llong_max"; then
# retry LLONG_MAX with -std=gnu99, needed on some Linuxes
unset ac_cv_have_decl_LLONG_MAX
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -std=gnu99"
AC_CHECK_DECL([LLONG_MAX],
[have_llong_max=1],
[CFLAGS="$saved_CFLAGS"],
[#include <limits.h>]
)
fi
fi
AC_MSG_CHECKING([if compiler allows __attribute__ on return types])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
__attribute__((__unused__)) static void foo(void){return;}]],
[[ exit(0); ]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
AC_DEFINE(NO_ATTRIBUTE_ON_RETURN_TYPE, 1,
[compiler does not accept __attribute__ on return types]) ]
)
AC_MSG_CHECKING([if compiler allows __attribute__ prototype args])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
typedef void foo(const char *, ...) __attribute__((format(printf, 1, 2)));]],
[[ exit(0); ]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
AC_DEFINE(NO_ATTRIBUTE_ON_PROTOTYPE_ARGS, 1,
[compiler does not accept __attribute__ on prototype args]) ]
)
AC_MSG_CHECKING([if compiler supports variable length arrays])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <stdlib.h>]],
[[ int i; for (i=0; i<3; i++){int a[i]; a[i-1]=0;} exit(0); ]])],
[ AC_MSG_RESULT([yes])
AC_DEFINE(VARIABLE_LENGTH_ARRAYS, [1],
[compiler supports variable length arrays]) ],
[ AC_MSG_RESULT([no]) ]
)
AC_MSG_CHECKING([if compiler accepts variable declarations after code])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <stdlib.h>]],
[[ int a; a = 1; int b = 1; exit(a-b); ]])],
[ AC_MSG_RESULT([yes])
AC_DEFINE(VARIABLE_DECLARATION_AFTER_CODE, [1],
[compiler variable declarations after code]) ],
[ AC_MSG_RESULT([no]) ]
)
if test "x$no_attrib_nonnull" != "x1" ; then
AC_DEFINE([HAVE_ATTRIBUTE__NONNULL__], [1], [Have attribute nonnull])
fi
AC_ARG_WITH([rpath],
[ --without-rpath Disable auto-added -R linker paths],
[
if test "x$withval" = "xno" ; then
rpath_opt=""
elif test "x$withval" = "xyes" ; then
rpath_opt="-R"
else
rpath_opt="$withval"
fi
]
)
# Allow user to specify flags
AC_ARG_WITH([cflags],
[ --with-cflags Specify additional flags to pass to compiler],
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
CFLAGS="$CFLAGS $withval"
fi
]
)
AC_ARG_WITH([cflags-after],
[ --with-cflags-after Specify additional flags to pass to compiler after configure],
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
CFLAGS_AFTER="$withval"
fi
]
)
AC_ARG_WITH([cppflags],
[ --with-cppflags Specify additional flags to pass to preprocessor] ,
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
CPPFLAGS="$CPPFLAGS $withval"
fi
]
)
AC_ARG_WITH([ldflags],
[ --with-ldflags Specify additional flags to pass to linker],
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
LDFLAGS="$LDFLAGS $withval"
fi
]
)
AC_ARG_WITH([ldflags-after],
[ --with-ldflags-after Specify additional flags to pass to linker after configure],
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
LDFLAGS_AFTER="$withval"
fi
]
)
AC_ARG_WITH([libs],
[ --with-libs Specify additional libraries to link with],
[
if test -n "$withval" && test "x$withval" != "xno" && \
test "x${withval}" != "xyes"; then
LIBS="$LIBS $withval"
fi
]
)
AC_ARG_WITH([Werror],
[ --with-Werror Build main code with -Werror],
[
if test -n "$withval" && test "x$withval" != "xno"; then
werror_flags="-Werror"
if test "x${withval}" != "xyes"; then
werror_flags="$withval"
fi
fi
]
)
dnl On some old platforms, sys/stat.h requires sys/types.h, but autoconf-2.71's
dnl AC_CHECK_INCLUDES_DEFAULT checks for them in the opposite order. If we
dnl haven't detected it, recheck.
if test "x$ac_cv_header_sys_stat_h" != "xyes"; then
unset ac_cv_header_sys_stat_h
AC_CHECK_HEADERS([sys/stat.h])
fi
AC_CHECK_HEADERS([ \
blf.h \
bstring.h \
crypt.h \
crypto/sha2.h \
dirent.h \
endian.h \
elf.h \
err.h \
features.h \
fcntl.h \
floatingpoint.h \
fnmatch.h \
getopt.h \
glob.h \
ia.h \
iaf.h \
ifaddrs.h \
inttypes.h \
langinfo.h \
limits.h \
locale.h \
login.h \
maillock.h \
ndir.h \
net/if_tun.h \
netdb.h \
netgroup.h \
pam/pam_appl.h \
paths.h \
poll.h \
pty.h \
readpassphrase.h \
rpc/types.h \
security/pam_appl.h \
sha2.h \
shadow.h \
stddef.h \
stdint.h \
string.h \
strings.h \
sys/bitypes.h \
sys/byteorder.h \
sys/bsdtty.h \
sys/cdefs.h \
sys/dir.h \
sys/file.h \
sys/mman.h \
sys/label.h \
sys/ndir.h \
sys/param.h \
sys/poll.h \
sys/prctl.h \
sys/procctl.h \
sys/pstat.h \
sys/ptrace.h \
sys/random.h \
sys/select.h \
sys/stream.h \
sys/stropts.h \
sys/strtio.h \
sys/statvfs.h \
sys/sysmacros.h \
sys/time.h \
sys/timers.h \
sys/vfs.h \
time.h \
tmpdir.h \
ttyent.h \
ucred.h \
unistd.h \
usersec.h \
util.h \
utime.h \
utmp.h \
utmpx.h \
vis.h \
wchar.h \
])
AC_CHECK_DECLS([le32toh, le64toh, htole64], [], [], [
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
#ifdef HAVE_ENDIAN_H
# include <endian.h>
#endif
])
# On some platforms (eg SunOS4) sys/audit.h requires sys/[time|types|label.h]
# to be included first.
AC_CHECK_HEADERS([sys/audit.h], [], [], [
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_LABEL_H
# include <sys/label.h>
#endif
])
# sys/capsicum.h requires sys/types.h
AC_CHECK_HEADERS([sys/capsicum.h capsicum_helpers.h], [], [], [
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
])
AC_MSG_CHECKING([for caph_cache_tzdata])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[ #include <capsicum_helpers.h> ]],
[[caph_cache_tzdata();]])],
[
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_CAPH_CACHE_TZDATA], [1],
[Define if you have caph_cache_tzdata])
],
[ AC_MSG_RESULT([no]) ]
)
# net/route.h requires sys/socket.h and sys/types.h.
# sys/sysctl.h also requires sys/param.h
AC_CHECK_HEADERS([net/route.h sys/sysctl.h], [], [], [
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <sys/param.h>
#include <sys/socket.h>
])
# lastlog.h requires sys/time.h to be included first on Solaris
AC_CHECK_HEADERS([lastlog.h], [], [], [
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
])
# sys/ptms.h requires sys/stream.h to be included first on Solaris
AC_CHECK_HEADERS([sys/ptms.h], [], [], [
#ifdef HAVE_SYS_STREAM_H
# include <sys/stream.h>
#endif
])
# login_cap.h requires sys/types.h on NetBSD
AC_CHECK_HEADERS([login_cap.h], [], [], [
#include <sys/types.h>
])
# older BSDs need sys/param.h before sys/mount.h
AC_CHECK_HEADERS([sys/mount.h], [], [], [
#include <sys/param.h>
])
# Android requires sys/socket.h to be included before sys/un.h
AC_CHECK_HEADERS([sys/un.h], [], [], [
#include <sys/types.h>
#include <sys/socket.h>
])
# Messages for features tested for in target-specific section
SIA_MSG="no"
SPC_MSG="no"
SP_MSG="no"
SPP_MSG="no"
# Support for Solaris/Illumos privileges (this test is used by both
# the --with-solaris-privs option and --with-sandbox=solaris).
SOLARIS_PRIVS="no"
# Default shared library extension
SHLIBEXT=".so"
# Check for some target-specific stuff
case "$host" in
*-*-aix*)
# Some versions of VAC won't allow macro redefinitions at
# -qlanglevel=ansi, and autoconf 2.60 sometimes insists on using that
# particularly with older versions of vac or xlc.
# It also throws errors about null macro arguments, but these are
# not fatal.
AC_MSG_CHECKING([if compiler allows macro redefinitions])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#include <stdlib.h>
#define testmacro foo
#define testmacro bar]],
[[ exit(0); ]])],
[ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
CC="`echo $CC | sed 's/-qlanglvl\=ansi//g'`"
CFLAGS="`echo $CFLAGS | sed 's/-qlanglvl\=ansi//g'`"
CPPFLAGS="`echo $CPPFLAGS | sed 's/-qlanglvl\=ansi//g'`"
]
)
AC_MSG_CHECKING([how to specify blibpath for linker ($LD)])
if (test -z "$blibpath"); then
blibpath="/usr/lib:/lib"
fi
saved_LDFLAGS="$LDFLAGS"
if test "$GCC" = "yes"; then
flags="-Wl,-blibpath: -Wl,-rpath, -blibpath:"
else
flags="-blibpath: -Wl,-blibpath: -Wl,-rpath,"
fi
for tryflags in $flags ;do
if (test -z "$blibflags"); then
LDFLAGS="$saved_LDFLAGS $tryflags$blibpath"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[blibflags=$tryflags], [])
fi
done
if (test -z "$blibflags"); then
AC_MSG_RESULT([not found])
AC_MSG_ERROR([*** must be able to specify blibpath on AIX - check config.log])
else
AC_MSG_RESULT([$blibflags])
fi
LDFLAGS="$saved_LDFLAGS"
dnl Check for authenticate. Might be in libs.a on older AIXes
AC_CHECK_FUNC([authenticate], [AC_DEFINE([WITH_AIXAUTHENTICATE], [1],
[Define if you want to enable AIX4's authenticate function])],
[AC_CHECK_LIB([s], [authenticate],
[ AC_DEFINE([WITH_AIXAUTHENTICATE])
LIBS="$LIBS -ls"
])
])
dnl Check for various auth function declarations in headers.
AC_CHECK_DECLS([authenticate, loginrestrictions, loginsuccess,
passwdexpired, setauthdb], , , [#include <usersec.h>])
dnl Check if loginfailed is declared and takes 4 arguments (AIX >= 5.2)
AC_CHECK_DECLS([loginfailed],
[AC_MSG_CHECKING([if loginfailed takes 4 arguments])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <usersec.h> ]],
[[ (void)loginfailed("user","host","tty",0); ]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([AIX_LOGINFAILED_4ARG], [1],
[Define if your AIX loginfailed() function
takes 4 arguments (AIX >= 5.2)])], [AC_MSG_RESULT([no])
])],
[],
[#include <usersec.h>]
)
AC_CHECK_FUNCS([getgrset setauthdb])
AC_CHECK_DECL([F_CLOSEM],
AC_DEFINE([HAVE_FCNTL_CLOSEM], [1], [Use F_CLOSEM fcntl for closefrom]),
[],
[ #include <limits.h>
#include <fcntl.h> ]
)
check_for_aix_broken_getaddrinfo=1
AC_DEFINE([SETEUID_BREAKS_SETUID], [1],
[Define if your platform breaks doing a seteuid before a setuid])
AC_DEFINE([BROKEN_SETREUID], [1], [Define if your setreuid() is broken])
AC_DEFINE([BROKEN_SETREGID], [1], [Define if your setregid() is broken])
dnl AIX handles lastlog as part of its login message
AC_DEFINE([DISABLE_LASTLOG], [1], [Define if you don't want to use lastlog])
AC_DEFINE([LOGIN_NEEDS_UTMPX], [1],
[Some systems need a utmpx entry for /bin/login to work])
AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
[Define to a Set Process Title type if your system is
supported by bsd-setproctitle.c])
AC_DEFINE([SSHPAM_CHAUTHTOK_NEEDS_RUID], [1],
[AIX 5.2 and 5.3 (and presumably newer) require this])
AC_DEFINE([PTY_ZEROREAD], [1], [read(1) can return 0 for a non-closed fd])
AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
AC_DEFINE([BROKEN_STRNDUP], 1, [strndup broken, see APAR IY61211])
AC_DEFINE([BROKEN_STRNLEN], 1, [strnlen broken, see APAR IY62551])
;;
*-*-android*)
AC_DEFINE([DISABLE_UTMP], [1], [Define if you don't want to use utmp])
AC_DEFINE([DISABLE_WTMP], [1], [Define if you don't want to use wtmp])
;;
*-*-cygwin*)
LIBS="$LIBS /usr/lib/textreadmode.o"
AC_DEFINE([HAVE_CYGWIN], [1], [Define if you are on Cygwin])
AC_DEFINE([USE_PIPES], [1], [Use PIPES instead of a socketpair()])
AC_DEFINE([NO_UID_RESTORATION_TEST], [1],
[Define to disable UID restoration test])
AC_DEFINE([DISABLE_SHADOW], [1],
[Define if you want to disable shadow passwords])
AC_DEFINE([NO_X11_UNIX_SOCKETS], [1],
[Define if X11 doesn't support AF_UNIX sockets on that system])
AC_DEFINE([DISABLE_FD_PASSING], [1],
[Define if your platform needs to skip post auth
file descriptor passing])
AC_DEFINE([SSH_IOBUFSZ], [65535], [Windows is sensitive to read buffer size])
AC_DEFINE([FILESYSTEM_NO_BACKSLASH], [1], [File names may not contain backslash characters])
# Cygwin defines optargs, optargs as declspec(dllimport) for historical
# reasons which cause compile warnings, so we disable those warnings.
OSSH_CHECK_CFLAG_COMPILE([-Wno-attributes])
SHLIBEXT=".dll"
;;
*-*-dgux*)
AC_DEFINE([IP_TOS_IS_BROKEN], [1],
[Define if your system choked on IP TOS setting])
AC_DEFINE([SETEUID_BREAKS_SETUID])
AC_DEFINE([BROKEN_SETREUID])
AC_DEFINE([BROKEN_SETREGID])
;;
*-*-darwin*)
use_pie=auto
AC_MSG_CHECKING([if we have working getaddrinfo])
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <mach-o/dyld.h>
#include <stdlib.h>
int main(void) { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
exit(0);
else
exit(1);
}
]])],
[AC_MSG_RESULT([working])],
[AC_MSG_RESULT([buggy])
AC_DEFINE([BROKEN_GETADDRINFO], [1],
[getaddrinfo is broken (if present)])
],
[AC_MSG_RESULT([assume it is working])])
AC_DEFINE([SETEUID_BREAKS_SETUID])
AC_DEFINE([BROKEN_SETREUID])
AC_DEFINE([BROKEN_SETREGID])
AC_DEFINE([BROKEN_GLOB], [1], [OS X glob does not do what we expect])
AC_DEFINE_UNQUOTED([BIND_8_COMPAT], [1],
[Define if your resolver libs need this for getrrsetbyname])
AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
[Use tunnel device compatibility to OpenBSD])
AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
[Prepend the address family to IP tunnel traffic])
m4_pattern_allow([AU_IPv])
AC_CHECK_DECL([AU_IPv4], [],
AC_DEFINE([AU_IPv4], [0], [System only supports IPv4 audit records])
[#include <bsm/audit.h>]
AC_DEFINE([LASTLOG_WRITE_PUTUTXLINE], [1],
[Define if pututxline updates lastlog too])
)
AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
[Define to a Set Process Title type if your system is
supported by bsd-setproctitle.c])
AC_CHECK_FUNCS([sandbox_init])
AC_CHECK_HEADERS([sandbox.h])
AC_CHECK_LIB([sandbox], [sandbox_apply], [
SSHDLIBS="$SSHDLIBS -lsandbox"
])
# proc_pidinfo()-based closefrom() replacement.
AC_CHECK_HEADERS([libproc.h])
AC_CHECK_FUNCS([proc_pidinfo])
# poll(2) is broken for character-special devices (at least).
# cf. Apple bug 3710161 (not public, but searchable)
AC_DEFINE([BROKEN_POLL], [1],
[System poll(2) implementation is broken])
SHLIBEXT=".dylib"
;;
*-*-dragonfly*)
SSHDLIBS="$SSHDLIBS"
TEST_MALLOC_OPTIONS="AFGJPRX"
;;
*-*-haiku*)
LIBS="$LIBS -lbsd "
CFLAGS="$CFLAGS -D_BSD_SOURCE"
AC_CHECK_LIB([network], [socket])
AC_DEFINE([HAVE_U_INT64_T])
AC_DEFINE([DISABLE_UTMPX], [1], [no utmpx])
MANTYPE=man
;;
*-*-hpux*)
# first we define all of the options common to all HP-UX releases
CPPFLAGS="$CPPFLAGS -D_HPUX_SOURCE -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1"
IPADDR_IN_DISPLAY=yes
AC_DEFINE([USE_PIPES])
AC_DEFINE([LOGIN_NEEDS_UTMPX])
AC_DEFINE([LOCKED_PASSWD_STRING], ["*"],
[String used in /etc/passwd to denote locked account])
AC_DEFINE([SPT_TYPE], [SPT_PSTAT])
AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
maildir="/var/mail"
LIBS="$LIBS -lsec"
AC_CHECK_LIB([xnet], [t_error], ,
[AC_MSG_ERROR([*** -lxnet needed on HP-UX - check config.log ***])])
# next, we define all of the options specific to major releases
case "$host" in
*-*-hpux10*)
if test -z "$GCC"; then
CFLAGS="$CFLAGS -Ae"
fi
AC_DEFINE([BROKEN_GETLINE], [1], [getline is not what we expect])
;;
*-*-hpux11*)
AC_DEFINE([PAM_SUN_CODEBASE], [1],
[Define if you are using Solaris-derived PAM which
passes pam_messages to the conversation function
with an extra level of indirection])
AC_DEFINE([DISABLE_UTMP], [1],
[Define if you don't want to use utmp])
AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
check_for_hpux_broken_getaddrinfo=1
check_for_conflicting_getspnam=1
;;
esac
# lastly, we define options specific to minor releases
case "$host" in
*-*-hpux10.26)
AC_DEFINE([HAVE_SECUREWARE], [1],
[Define if you have SecureWare-based
protected password database])
disable_ptmx_check=yes
LIBS="$LIBS -lsecpw"
;;
esac
;;
*-*-irix5*)
PATH="$PATH:/usr/etc"
AC_DEFINE([BROKEN_INET_NTOA], [1],
[Define if you system's inet_ntoa is busted
(e.g. Irix gcc issue)])
AC_DEFINE([SETEUID_BREAKS_SETUID])
AC_DEFINE([BROKEN_SETREUID])
AC_DEFINE([BROKEN_SETREGID])
AC_DEFINE([WITH_ABBREV_NO_TTY], [1],
[Define if you shouldn't strip 'tty' from your
ttyname in [uw]tmp])
AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
;;
*-*-irix6*)
PATH="$PATH:/usr/etc"
AC_DEFINE([WITH_IRIX_ARRAY], [1],
[Define if you have/want arrays
(cluster-wide session management, not C arrays)])
AC_DEFINE([WITH_IRIX_PROJECT], [1],
[Define if you want IRIX project management])
AC_DEFINE([WITH_IRIX_AUDIT], [1],
[Define if you want IRIX audit trails])
AC_CHECK_FUNC([jlimit_startjob], [AC_DEFINE([WITH_IRIX_JOBS], [1],
[Define if you want IRIX kernel jobs])])
AC_DEFINE([BROKEN_INET_NTOA])
AC_DEFINE([SETEUID_BREAKS_SETUID])
AC_DEFINE([BROKEN_SETREUID])
AC_DEFINE([BROKEN_SETREGID])
AC_DEFINE([BROKEN_UPDWTMPX], [1], [updwtmpx is broken (if present)])
AC_DEFINE([WITH_ABBREV_NO_TTY])
AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
;;
*-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
AC_DEFINE([PAM_TTY_KLUDGE])
AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"])
AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
;;
*-*-linux*)
no_dev_ptmx=1
use_pie=auto
check_for_openpty_ctty_bug=1
dnl Target SUSv3/POSIX.1-2001 plus BSD specifics.
dnl _DEFAULT_SOURCE is the new name for _BSD_SOURCE
dnl _GNU_SOURCE is needed for setres*id prototypes.
CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_GNU_SOURCE"
AC_DEFINE([BROKEN_CLOSEFROM], [1], [broken in chroots on older kernels])
AC_DEFINE([PAM_TTY_KLUDGE], [1],
[Work around problematic Linux PAM modules handling of PAM_TTY])
AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"],
[String used in /etc/passwd to denote locked account])
AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
AC_DEFINE([LINK_OPNOTSUPP_ERRNO], [EPERM],
[Define to whatever link() returns for "not supported"
if it doesn't return EOPNOTSUPP.])
AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
AC_DEFINE([USE_BTMP])
AC_DEFINE([LINUX_OOM_ADJUST], [1], [Adjust Linux out-of-memory killer])
AC_DEFINE([SYSTEMD_NOTIFY], [1], [Have sshd notify systemd on start/reload])
inet6_default_4in6=yes
case `uname -r` in
1.*|2.0.*)
AC_DEFINE([BROKEN_CMSG_TYPE], [1],
[Define if cmsg_type is not passed correctly])
;;
esac
# tun(4) forwarding compat code
AC_CHECK_HEADERS([linux/if_tun.h])
if test "x$ac_cv_header_linux_if_tun_h" = "xyes" ; then
AC_DEFINE([SSH_TUN_LINUX], [1],
[Open tunnel devices the Linux tun/tap way])
AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
[Use tunnel device compatibility to OpenBSD])
AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
[Prepend the address family to IP tunnel traffic])
fi
AC_CHECK_HEADER([linux/if.h],
AC_DEFINE([SYS_RDOMAIN_LINUX], [1],
[Support routing domains using Linux VRF]), [], [
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
])
AC_CHECK_HEADERS([linux/seccomp.h linux/filter.h linux/audit.h], [],
[], [#include <linux/types.h>])
# Obtain MIPS ABI
case "$host" in
mips*)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if _MIPS_SIM != _ABIO32
#error
#endif
]])],[mips_abi="o32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if _MIPS_SIM != _ABIN32
#error
#endif
]])],[mips_abi="n32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if _MIPS_SIM != _ABI64
#error
#endif
]])],[mips_abi="n64"],[AC_MSG_ERROR([unknown MIPS ABI])
])
])
])
;;
esac
AC_MSG_CHECKING([for seccomp architecture])
seccomp_audit_arch=
case "$host" in
x86_64-*)
seccomp_audit_arch=AUDIT_ARCH_X86_64
;;
i*86-*)
seccomp_audit_arch=AUDIT_ARCH_I386
;;
arm*-*)
seccomp_audit_arch=AUDIT_ARCH_ARM
;;
aarch64*-*)
seccomp_audit_arch=AUDIT_ARCH_AARCH64
;;
s390x-*)
seccomp_audit_arch=AUDIT_ARCH_S390X
;;
s390-*)
seccomp_audit_arch=AUDIT_ARCH_S390
;;
powerpc-*)