configure.ac

AC_INIT([tlsdate],[0.0.4],[jacob at appelbaum.net])
AC_CONFIG_AUX_DIR([config])
AC_CONFIG_MACRO_DIR([m4])

AC_CANONICAL_TARGET
AC_ARG_PROGRAM
AC_USE_SYSTEM_EXTENSIONS

AM_INIT_AUTOMAKE([-Wall -Werror -Wno-portability subdir-objects foreign tar-ustar])

AC_PREREQ([2.63])

AC_CONFIG_HEADERS([config.h:config.in])dnl Keep filename to 8.3 for MS-DOS.

PKG_PROG_PKG_CONFIG
LT_PREREQ([2.2])
LT_INIT
LT_LANG([C])
gl_VISIBILITY
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

CONFIG_EXTRA

dnl Here we should build a small program to fetch the build system time in a portable
dnl manner. We have no Win32 users, we can fix this if we ever find one that
dnl cares.
COMPILE_DATE=`date +%s`
AC_SUBST([COMPILE_DATE])
AC_DEFINE_UNQUOTED([RECENT_COMPILE_DATE],
                   [(uint32_t) ${COMPILE_DATE}],
                   [Time in seconds since the Disco epoch at build time])

dnl Build up the directory we will use to install certs
TLSDATE_CA_ROOTS="${sysconfdir}/$PACKAGE_NAME/ca-roots"
AC_SUBST([TLSDATE_CA_ROOTS])

dnl Required headers
dnl First check to see if openssl is installed
AC_CHECK_HEADERS([openssl/ssl.h], ,[AC_MSG_ERROR([OpenSSL is not installed, openssl/sslh is missing])])

AC_CHECK_HEADERS([arpa/inet.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([getopt.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([grp.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([openssl/bio.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([openssl/err.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([openssl/evp.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([pwd.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([stdint.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([stdio.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([stdlib.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([sys/mman.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([sys/time.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([sys/types.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([sys/wait.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([time.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])
AC_CHECK_HEADERS([unistd.h], ,[AC_MSG_ERROR([Required headers missing; compilation will not succeed])])

AC_CHECK_FUNCS([setresuid])
AC_CHECK_FUNCS([gettimeofday])

AC_MSG_CHECKING([user/group to drop privs to])

AC_ARG_WITH([unpriv-user],
            [AS_HELP_STRING([--with-unpriv-user=<user>],
                            [User to drop privs to @<:@default: nobody@:>@])])
AS_CASE([$with_unpriv_user],
        [""|yes|no], [UNPRIV_USER="nobody"],
        [*], [UNPRIV_USER=$with_unpriv_user])
AC_DEFINE_UNQUOTED([UNPRIV_USER], ["${UNPRIV_USER}"], [Unprivileged user])

AC_ARG_WITH([unpriv-group],
            [AS_HELP_STRING([--with-unpriv-group=<group>],
                            [Group to drop privs to @<:@default: nogroup@:>@])])
AS_CASE([$with_unpriv_group],
        [""|yes|no], [UNPRIV_GROUP="nogroup"],
        [*], [UNPRIV_GROUP=$with_unpriv_group])
AC_DEFINE_UNQUOTED([UNPRIV_GROUP], ["${UNPRIV_GROUP}"], [Unprivileged group])

AC_MSG_RESULT(${UNPRIV_USER}:${UNPRIV_GROUP})

dnl Check for clock_gettime.  Some systems put it into -lc, while
dnl others use -lrt.  Try the first and fallback to the latter.
RT_LIB=
AC_CHECK_FUNC([clock_gettime], [:],
              [AC_CHECK_LIB([rt], [clock_gettime], [RT_LIB="-lrt"],
                            [AC_MSG_ERROR([Your system lacks clock_gettime])])])
AC_SUBST(RT_LIB)

AC_ARG_ENABLE([dbus],
              [AS_HELP_STRING([--disable-dbus],
                              [Disable automatically dbus support])])
AS_IF([test "x$enable_dbus" = xyes], [
    PKG_CHECK_MODULES([DBUS], [dbus-1], [
            AC_DEFINE([HAVE_DBUS], [1], [Enable dbus support])
            AC_MSG_CHECKING([user/group to use for dbus])
            AC_ARG_WITH([dbus-user],
                        [AS_HELP_STRING([--with-dbus-user=<user>],
                                        [User to send dbus signals from @<:@default: nobody@:>@])])
            AS_CASE([$with_dbus_user],
                    [""|yes|no], [DBUS_USER="nobody"],
                    [*], [DBUS_USER=$with_dbus_user])
            AC_ARG_WITH([dbus-group],
                        [AS_HELP_STRING([--with-dbus-group=<group>],
                                        [Group to send dbus signals from @<:@default: nogroup@:>@])])
            AS_CASE([$with_dbus_group],
                    [""|yes|no], [DBUS_GROUP="nogroup"],
                    [*], [DBUS_GROUP=$with_dbus_group])
            AC_MSG_RESULT(${DBUS_USER}:${DBUS_GROUP})
            AC_DEFINE_UNQUOTED([DBUS_USER], ["${DBUS_USER}"], [DBus user])
            AC_DEFINE_UNQUOTED([DBUS_GROUP], ["${DBUS_GROUP}"], [DBus group])
        ], [
            AS_IF([test "x$enable_dbus" = xyes],
                  [AC_MSG_ERROR([dbus requested but not found])])
        ])
    ])

AC_SUBST(DBUS_CFLAGS)
AC_SUBST(DBUS_LIBS)

dnl Debug and hardening flags all in one shot
dnl Always do this at the end, otherwise you end up filtering system/other libraries
AC_ARG_ENABLE([hardened-checks],
              [AS_HELP_STRING([--disable-hardened-checks],
                              [Disable automatically enabling hardened toolchain options])])
AC_DEFUN([LOCAL_CHECK_FLAGS],[
          AC_REQUIRE([AX_CHECK_LINK_FLAG])
          AC_REQUIRE([AX_APPEND_COMPILE_FLAGS])
          AC_LANG_PUSH([C])
          AS_IF([test "x$enable_hardened_checks" != xno], [
              CFLAGS=
              LIBS=
              AX_APPEND_COMPILE_FLAGS([-g -O1])
          ], [
              AC_MSG_WARN([using hardened flags is HIGHLY RECOMMENDED and disabling them is a BAD IDEA])
          ])
          AX_APPEND_COMPILE_FLAGS([-Wall -fno-strict-aliasing])
          AS_IF([test "x$enable_hardened_checks" != xno], [
              AX_APPEND_COMPILE_FLAGS([-D_FORTIFY_SOURCE=2 -fstack-protector-all])
              AX_APPEND_COMPILE_FLAGS([-fwrapv -fPIE -Wstack-protector])
              AX_APPEND_COMPILE_FLAGS([--param=ssp-buffer-size=1])
              AX_CHECK_LINK_FLAG([-z relro -z now])
              AX_CHECK_LINK_FLAG([-pie])
          ])
          AC_LANG_POP
          ])
LOCAL_CHECK_FLAGS

AC_CONFIG_FILES([Makefile])
AC_OUTPUT