ca18a5346f
work reliably on some platforms. So, avoid doing so on anything other than Linux/i386. For all other platforms, assume that the code is not linked against libpthread. For ShellInABox, this is always the correct assumption. But if the code gets embedded into other projects, this might have to be changed. git-svn-id: https://shellinabox.googlecode.com/svn/trunk@141 0da03de8-d603-11dd-86c2-0f8696b7b6f9
127 lines
5.2 KiB
Text
127 lines
5.2 KiB
Text
AC_PREREQ(2.57)
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dnl This is the one location where the authoritative version number is stored
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AC_INIT(shellinabox, 2.9, markus@shellinabox.com)
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VCS_REVISION=141
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AC_SUBST(VCS_REVISION)
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AC_DEFINE_UNQUOTED(VCS_REVISION, "${VCS_REVISION}",
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[Most recent revision number in the version control system])
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dnl Set up autoconf/automake for building C libraries and binaries with GCC
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CFLAGS="${CFLAGS:--Os}"
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AM_INIT_AUTOMAKE
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AM_CONFIG_HEADER(config.h)
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AC_PROG_CC
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AC_LANG_WERROR
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AC_PROG_INSTALL
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AC_PROG_LIBTOOL
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AC_SUBST(LIBTOOL_DEPS)
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AC_C_CONST
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AC_PROG_GCC_TRADITIONAL
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dnl Check for header files that do not exist on all platforms
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AC_CHECK_HEADERS([libutil.h pthread.h pty.h sys/prctl.h sys/uio.h util.h \
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utmp.h utmpx.h])
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dnl Most systems require linking against libutil.so in order to get login_tty()
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AC_CHECK_FUNCS(login_tty, [],
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[AC_CHECK_LIB(util, login_tty,
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[LIBS="-lutil $LIBS"
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AC_DEFINE(HAVE_LOGIN_TTY)])])
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dnl Use strlcat() instead of strncat() to avoid spurious warnings
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AC_CHECK_FUNCS([strlcat])
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dnl Prefer thread-safe functions, if available
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AC_CHECK_FUNCS([getgrgid_r getgrnam_r getpwnam_r getpwuid_r openpty \
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strcasestr ])
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dnl We prefer ptsname_r(), but will settle for ptsname() if necessary
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AC_TRY_LINK([#ifndef _XOPEN_SOURCE
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#define _XOPEN_SOURCE
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#endif
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdlib.h>],
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[char buf[10]; ptsname_r(0, buf, sizeof(buf));],
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[AC_DEFINE(HAVE_PTSNAME_R, 1,
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Define to 1 if you have a re-entrant version of ptsname)])
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dnl Apparently, some systems define sigwait() but fail to implement it
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AC_TRY_LINK([#include <pthread.h>
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#include <signal.h>],
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[sigset_t s; int n; sigwait(&s, &n);],
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[AC_DEFINE(HAVE_SIGWAIT, 1,
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Define to 1 if you have a working sigwait)])
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dnl We automatically detect SSL support, but allow users to disable it
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AC_ARG_ENABLE(ssl,
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[ --disable-ssl if available at built-time, support for SSL
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connections will be enabled. It can still be
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disabled at run-time, either on the daemon's
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command line or if the operating system does not
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have the OpenSSL libraries available.])
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dnl We automatically detect PAM support, but allow users to disable it
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AC_ARG_ENABLE(pam,
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[ --disable-pam PAM support is necessary in order to authenticate
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users for running programs other than their default
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login shell.])
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dnl We try to always use dlopen() instead of linking libraries dynamically, as
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dnl this reduces the hard run-time dependencies that our binary has. But we
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dnl allow users to disable this feature.
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AC_ARG_ENABLE(runtime-loading,
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[ --disable-runtime-loading ShellInABox will try to load the OpenSSL, and PAM
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libraries at run-time, if it has been compiled with
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support for these libraries, and if the operating
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system supports dynamic loading of libraries. This
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allows you to install the same binary on different
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systems independent of whether they have OpenSSL
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and PAM enabled. If you would rather directly link
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these libraries into the binary, thus making them a
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hard dependency, then disable runtime-loading.])
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dnl Only test for OpenSSL headers, if not explicitly disabled
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if test "x$enable_ssl" != xno; then
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AC_CHECK_HEADERS([openssl/bio.h openssl/err.h openssl/ssl.h])
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fi
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dnl Only test for PAM headers, if not explicitly disabled
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if test "x$enable_pam" != xno; then
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AC_CHECK_HEADERS([security/pam_appl.h security/pam_client.h \
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security/pam_misc.h ])
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fi
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dnl Only test for dlopen(), if not explicitly disabled. Add required libdl.so
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dnl library if necessary. Also, if dlopen() is not available on this system,
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dnl explicitly disable runtime loading.
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if test "x$enable_runtime_loading" != xno; then
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AC_CHECK_FUNCS(dlopen, [],
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[AC_CHECK_LIB(dl, dlopen,
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[LIBS="-ldl $LIBS"
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AC_DEFINE(HAVE_DLOPEN)],
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[enable_runtime_loading=no])])
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fi
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dnl If runtime loading has been disabled, add OpenSSL and PAM as hard
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dnl dependencies.
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if test "x$enable_runtime_loading" == xno; then
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dnl Link against OpenSSL libraries, unless SSL support has been disabled
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if test "x$enable_ssl" != xno; then
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AC_CHECK_HEADER(openssl/bio.h,
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[AC_CHECK_HEADER(openssl/err.h,
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[AC_CHECK_HEADER(openssl/ssl.h, [LIBS="-lssl -lcrypto $LIBS"])])])
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fi
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dnl Link against PAM libraries, unless PAM support has been disabled
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if test "x$enable_pam" != xno; then
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AC_CHECK_HEADER(security/pam_appl.h, [LIBS="-lpam $LIBS"])
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AC_CHECK_HEADER(security/pam_misc.h, [LIBS="-lpam_misc $LIBS"])
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fi
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fi
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dnl Generate output files
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AC_CONFIG_FILES([Makefile])
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AC_OUTPUT
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