3 dnl This is the one location where the authoritative version number is stored
4 AC_INIT(shellinabox, 2.10, markus@shellinabox.com)
7 AC_DEFINE_UNQUOTED(VCS_REVISION, "${VCS_REVISION}",
8 [Most recent revision number in the version control system])
10 dnl Set up autoconf/automake for building C libraries and binaries with GCC
11 CFLAGS="${CFLAGS:--Os}"
13 AM_CONFIG_HEADER(config.h)
18 AC_SUBST(LIBTOOL_DEPS)
20 AC_PROG_GCC_TRADITIONAL
22 dnl Check for header files that do not exist on all platforms
23 AC_CHECK_HEADERS([libutil.h pthread.h pty.h strings.h sys/prctl.h sys/uio.h \
24 util.h utmp.h utmpx.h])
26 dnl Most systems require linking against libutil.so in order to get login_tty()
27 AC_CHECK_FUNCS(login_tty, [],
28 [AC_CHECK_LIB(util, login_tty,
30 AC_DEFINE(HAVE_LOGIN_TTY)])])
32 dnl Use strlcat() instead of strncat() to avoid spurious warnings
33 AC_CHECK_FUNCS([strlcat])
35 dnl Prefer thread-safe functions, if available
36 AC_CHECK_FUNCS([getgrgid_r getgrnam_r getpwnam_r getpwuid_r openpty \
39 dnl We prefer ptsname_r(), but will settle for ptsname() if necessary
40 AC_TRY_LINK([#ifndef _XOPEN_SOURCE
47 [char buf[10]; ptsname_r(0, buf, sizeof(buf));],
48 [AC_DEFINE(HAVE_PTSNAME_R, 1,
49 Define to 1 if you have a re-entrant version of ptsname)])
51 dnl Apparently, some systems define sigwait() but fail to implement it
52 AC_TRY_LINK([#include <pthread.h>
54 [sigset_t s; int n; sigwait(&s, &n);],
55 [AC_DEFINE(HAVE_SIGWAIT, 1,
56 Define to 1 if you have a working sigwait)])
58 dnl Not every system has support for isnan()
59 AC_TRY_LINK([#include <math.h>],
61 [AC_DEFINE(HAVE_ISNAN, 1,
62 Define to 1 if you have support for isnan)])
64 dnl On some systems, calling /bin/login does not work. Disable the LOGIN
65 dnl feature, if the user tells us that it does not do the right thing.
67 [ --disable-login on some systems (e.g. Fedora), calling /bin/login
68 does not work well. If you know that your system
69 suffers from this problem, set this option to
70 remove support for the LOGIN keyword in the
71 service description.])
72 if test "x$enable_login" != xno; then
73 AC_DEFINE(HAVE_BIN_LOGIN, 1,
74 Set if you want support for calling /bin/login)
77 dnl We automatically detect SSL support, but allow users to disable it
79 [ --disable-ssl if available at built-time, support for SSL
80 connections will be enabled. It can still be
81 disabled at run-time, either on the daemon's
82 command line or if the operating system does not
83 have the OpenSSL libraries available.])
85 dnl We automatically detect PAM support, but allow users to disable it
87 [ --disable-pam PAM support is necessary in order to authenticate
88 users for running programs other than their default
91 dnl We try to always use dlopen() instead of linking libraries dynamically, as
92 dnl this reduces the hard run-time dependencies that our binary has. But we
93 dnl allow users to disable this feature.
94 AC_ARG_ENABLE(runtime-loading,
95 [ --disable-runtime-loading ShellInABox will try to load the OpenSSL, and PAM
96 libraries at run-time, if it has been compiled with
97 support for these libraries, and if the operating
98 system supports dynamic loading of libraries. This
99 allows you to install the same binary on different
100 systems independent of whether they have OpenSSL
101 and PAM enabled. If you would rather directly link
102 these libraries into the binary, thus making them a
103 hard dependency, then disable runtime-loading.])
105 dnl Only test for OpenSSL headers, if not explicitly disabled
106 if test "x$enable_ssl" != xno; then
107 AC_CHECK_HEADERS([openssl/bio.h openssl/err.h openssl/ssl.h])
110 dnl Only test for PAM headers, if not explicitly disabled
111 if test "x$enable_pam" != xno; then
112 AC_CHECK_HEADERS([security/pam_appl.h security/pam_client.h \
113 security/pam_misc.h ])
116 dnl Only test for dlopen(), if not explicitly disabled. Add required libdl.so
117 dnl library if necessary. Also, if dlopen() is not available on this system,
118 dnl explicitly disable runtime loading.
119 if test "x$enable_runtime_loading" != xno; then
120 AC_CHECK_FUNCS(dlopen, [],
121 [AC_CHECK_LIB(dl, dlopen,
123 AC_DEFINE(HAVE_DLOPEN)],
124 [enable_runtime_loading=no])])
127 dnl If runtime loading has been disabled, add OpenSSL and PAM as hard
129 if test "x$enable_runtime_loading" == xno; then
130 dnl Link against OpenSSL libraries, unless SSL support has been disabled
131 if test "x$enable_ssl" != xno; then
132 AC_CHECK_HEADER(openssl/bio.h,
133 [AC_CHECK_HEADER(openssl/err.h,
134 [AC_CHECK_HEADER(openssl/ssl.h, [LIBS="-lssl -lcrypto $LIBS"])])])
137 dnl Link against PAM libraries, unless PAM support has been disabled
138 if test "x$enable_pam" != xno; then
139 AC_CHECK_HEADER(security/pam_appl.h, [LIBS="-lpam $LIBS"])
140 AC_CHECK_HEADER(security/pam_misc.h, [LIBS="-lpam_misc $LIBS"])
144 AC_CHECK_LIB(z, deflate, [
145 AC_CHECK_HEADER(zlib.h, [LIBS="-lz $LIBS"
146 AC_DEFINE(HAVE_ZLIB, 1,
147 Define to 1 if zlib development files are installed)
150 dnl Generate output files
151 AC_CONFIG_FILES([Makefile])