configure.ac

#********************IMPORTANT DRAKVUF LICENSE TERMS**********************#
#                                                                         #
# DRAKVUF (C) 2014-2021 Tamas K Lengyel.                                  #
# Tamas K Lengyel is hereinafter referred to as the author.               #
# This program is free software; you may redistribute and/or modify it    #
# under the terms of the GNU General Public License as published by the   #
# Free Software Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE   #
# CLARIFICATIONS AND EXCEPTIONS DESCRIBED HEREIN.  This guarantees your   #
# right to use, modify, and redistribute this software under certain      #
# conditions.  If you wish to embed DRAKVUF technology into proprietary   #
# software, alternative licenses can be aquired from the author.          #
#                                                                         #
# Note that the GPL places important restrictions on "derivative works",  #
# yet it does not provide a detailed definition of that term.  To avoid   #
# misunderstandings, we interpret that term as broadly as copyright law   #
# allows.  For example, we consider an application to constitute a        #
# derivative work for the purpose of this license if it does any of the   #
# following with any software or content covered by this license          #
# ("Covered Software"):                                                   #
#                                                                         #
# o Integrates source code from Covered Software.                         #
#                                                                         #
# o Reads or includes copyrighted data files.                             #
#                                                                         #
# o Is designed specifically to execute Covered Software and parse the    #
# results (as opposed to typical shell or execution-menu apps, which will #
# execute anything you tell them to).                                     #
#                                                                         #
# o Includes Covered Software in a proprietary executable installer.  The #
# installers produced by InstallShield are an example of this.  Including #
# DRAKVUF with other software in compressed or archival form does not     #
# trigger this provision, provided appropriate open source decompression  #
# or de-archiving software is widely available for no charge.  For the    #
# purposes of this license, an installer is considered to include Covered #
# Software even if it actually retrieves a copy of Covered Software from  #
# another source during runtime (such as by downloading it from the       #
# Internet).                                                              #
#                                                                         #
# o Links (statically or dynamically) to a library which does any of the  #
# above.                                                                  #
#                                                                         #
# o Executes a helper program, module, or script to do any of the above.  #
#                                                                         #
# This list is not exclusive, but is meant to clarify our interpretation  #
# of derived works with some common examples.  Other people may interpret #
# the plain GPL differently, so we consider this a special exception to   #
# the GPL that we apply to Covered Software.  Works which meet any of     #
# these conditions must conform to all of the terms of this license,      #
# particularly including the GPL Section 3 requirements of providing      #
# source code and allowing free redistribution of the work as a whole.    #
#                                                                         #
# Any redistribution of Covered Software, including any derived works,    #
# must obey and carry forward all of the terms of this license, including #
# obeying all GPL rules and restrictions.  For example, source code of    #
# the whole work must be provided and free redistribution must be         #
# allowed.  All GPL references to "this License", are to be treated as    #
# including the terms and conditions of this license text as well.        #
#                                                                         #
# Because this license imposes special exceptions to the GPL, Covered     #
# Work may not be combined (even as part of a larger work) with plain GPL #
# software.  The terms, conditions, and exceptions of this license must   #
# be included as well.  This license is incompatible with some other open #
# source licenses as well.  In some cases we can relicense portions of    #
# DRAKVUF or grant special permissions to use it in other open source     #
# software.  Please contact tamas.k.lengyel@gmail.com with any such       #
# requests.  Similarly, we don't incorporate incompatible open source     #
# software into Covered Software without special permission from the      #
# copyright holders.                                                      #
#                                                                         #
# If you have any questions about the licensing restrictions on using     #
# DRAKVUF in other works, are happy to help.  As mentioned above,         #
# alternative license can be requested from the author to integrate       #
# DRAKVUF into proprietary applications and appliances.  Please email     #
# tamas.k.lengyel@gmail.com for further information.                      #
#                                                                         #
# If you have received a written license agreement or contract for        #
# Covered Software stating terms other than these, you may choose to use  #
# and redistribute Covered Software under those terms instead of these.   #
#                                                                         #
# Source is provided to this software because we believe users have a     #
# right to know exactly what a program is going to do before they run it. #
# This also allows you to audit the software for security holes.          #
#                                                                         #
# Source code also allows you to port DRAKVUF to new platforms, fix bugs, #
# and add new features.  You are highly encouraged to submit your changes #
# on https://github.com/tklengyel/drakvuf, or by other methods.           #
# By sending these changes, it is understood (unless you specify          #
# otherwise) that you are offering unlimited, non-exclusive right to      #
# reuse, modify, and relicense the code.  DRAKVUF will always be          #
# available Open Source, but this is important because the inability to   #
# relicense code has caused devastating problems for other Free Software  #
# projects (such as KDE and NASM).                                        #
# To specify special license conditions of your contributions, just say   #
# so when you send them.                                                  #
#                                                                         #
# This program is distributed in the hope that it will be useful, but     #
# WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the DRAKVUF   #
# license file for more details (it's in a COPYING file included with     #
# DRAKVUF, and also available from                                        #
# https://github.com/tklengyel/drakvuf/COPYING)                           #
#                                                                         #
#*************************************************************************#

AC_PREREQ([2.60])
AC_INIT([DRAKVUF],
        m4_join([], [0.8-git],
            m4_esyscmd_s([git log -1 --date=format:%Y%m%d%H%M%S --pretty=format:%cd]), [+], m4_esyscmd_s([git describe --always]), [-1]),
        [tamas@tklengyel.com], [],
        [https://drakvuf.com])
AM_INIT_AUTOMAKE([1.10 no-define foreign subdir-objects])
LT_INIT
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])

AC_PROG_CC_STDC
AC_PROG_CXX(clang++)
AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
AX_CXX_COMPILE_STDCXX([17], [ext], [mandatory])
CXXFLAGS="-std=gnu++17"

######################################################

AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[bool test[2] = { [1] = 1, [0] = 0 };]])], [],
    [AC_ERROR(Your C++ compiler ($CXX) is not supported. Please use clang++ (clang-9 or clang-10)!)])

#Check requirement of lstdc++fs
STDCPPFSLIB=""
AC_CHECK_HEADERS([filesystem])
AC_LINK_IFELSE(
    [AC_LANG_SOURCE([
        #if HAVE_FILESYSTEM
        #include <filesystem>
        #endif

        int main() {
            std::error_code ec;
            std::filesystem::create_directory("/dev/null", &ec);
        }
    ])], [],
    [STDCPPFSLIB="-lstdc++fs"]
)
AC_SUBST([STDCPPFSLIB])
#end requirement check

AC_LANG_POP([C++])

######################################################

AC_ARG_ENABLE([plugin_syscalls],
  [AS_HELP_STRING([--disable-plugin-syscalls],
    [Enable the syscall tracing plugin @<:@yes@:>@])],
  [plugin_syscalls="$enableval"],
  [plugin_syscalls="yes"])
AM_CONDITIONAL([PLUGIN_SYSCALLS], [test x$plugin_syscalls = xyes])
if test x$plugin_syscalls = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_SYSCALLS, 1, "")
fi

AC_ARG_ENABLE([plugin_poolmon],
  [AS_HELP_STRING([--disable-plugin-poolmon],
    [Enable the kernel heap allocation tracer @<:@yes@:>@])],
  [plugin_poolmon="$enableval"],
  [plugin_poolmon="yes"])
AM_CONDITIONAL([PLUGIN_POOLMON], [test x$plugin_poolmon = xyes])
if test x$plugin_poolmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_POOLMON, 1, "")
fi

AC_ARG_ENABLE([plugin_filetracer],
  [AS_HELP_STRING([--disable-plugin-filetracer],
    [Enable the file tracer plugin @<:@yes@:>@])],
  [plugin_filetracer="$enableval"],
  [plugin_filetracer="yes"])
AM_CONDITIONAL([PLUGIN_FILETRACER], [test x$plugin_filetracer = xyes])
if test x$plugin_filetracer = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_FILETRACER, 1, "")
fi

AC_ARG_ENABLE([plugin_filedelete],
  [AS_HELP_STRING([--disable-plugin-filedelete],
    [Enable the file delete catching plugin @<:@yes@:>@])],
  [plugin_filedelete="$enableval"],
  [plugin_filedelete="yes"])
AM_CONDITIONAL([PLUGIN_FILEDELETE], [test x$plugin_filedelete = xyes])
if test x$plugin_filedelete = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_FILEDELETE, 1, "")
fi

AC_ARG_ENABLE([plugin_objmon],
  [AS_HELP_STRING([--disable-plugin-objmon],
    [Enable the ObCreateObject watching plugin @<:@yes@:>@])],
  [plugin_objmon="$enableval"],
  [plugin_objmon="yes"])
AM_CONDITIONAL([PLUGIN_OBJMON], [test x$plugin_objmon = xyes])
if test x$plugin_objmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_OBJMON, 1, "")
fi

AC_ARG_ENABLE([plugin_exmon],
  [AS_HELP_STRING([--disable-plugin-exmon],
    [Enable the KiDispatchException watching plugin @<:@yes@:>@])],
  [plugin_exmon="$enableval"],
  [plugin_exmon="yes"])
AM_CONDITIONAL([PLUGIN_EXMON], [test x$plugin_exmon = xyes])
if test x$plugin_exmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_EXMON, 1, "")
fi

AC_ARG_ENABLE([plugin_ssdtmon],
  [AS_HELP_STRING([--disable-plugin-ssdtmon],
    [Enable the KiServiceTable watching plugin @<:@yes@:>@])],
  [plugin_ssdtmon="$enableval"],
  [plugin_ssdtmon="yes"])
AM_CONDITIONAL([PLUGIN_SSDTMON], [test x$plugin_ssdtmon = xyes])
if test x$plugin_ssdtmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_SSDTMON, 1, "")
fi

AC_ARG_ENABLE([plugin_debugmon],
  [AS_HELP_STRING([--disable-plugin-debugmon],
    [Enable the debug exception watching plugin @<:@yes@:>@])],
  [plugin_debugmon="$enableval"],
  [plugin_debugmon="yes"])
AM_CONDITIONAL([PLUGIN_DEBUGMON], [test x$plugin_debugmon = xyes])
if test x$plugin_debugmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_DEBUGMON, 1, "")
fi

AC_ARG_ENABLE([plugin_delaymon],
  [AS_HELP_STRING([--disable-plugin-delaymon],
    [Enable the debug exception watching plugin @<:@yes@:>@])],
  [plugin_delaymon="$enableval"],
  [plugin_delaymon="yes"])
AM_CONDITIONAL([PLUGIN_DELAYMON], [test x$plugin_delaymon = xyes])
if test x$plugin_delaymon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_DELAYMON, 1, "")
fi

AC_ARG_ENABLE([plugin_cpuidmon],
  [AS_HELP_STRING([--disable-plugin-cpuidmon],
    [Enable the CPUID watching plugin @<:@yes@:>@])],
  [plugin_cpuidmon="$enableval"],
  [plugin_cpuidmon="yes"])
AM_CONDITIONAL([PLUGIN_CPUIDMON], [test x$plugin_cpuidmon = xyes])
if test x$plugin_cpuidmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_CPUIDMON, 1, "")
fi

AC_ARG_ENABLE([plugin_socketmon],
  [AS_HELP_STRING([--disable-plugin-socketmon],
    [Enable the network socket watching plugin @<:@yes@:>@])],
  [plugin_socketmon="$enableval"],
  [plugin_socketmon="yes"])
AM_CONDITIONAL([PLUGIN_SOCKETMON], [test x$plugin_socketmon = xyes])
if test x$plugin_socketmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_SOCKETMON, 1, "")
fi

AC_ARG_ENABLE([plugin_regmon],
  [AS_HELP_STRING([--disable-plugin-regmon],
    [Enable the windows registry watching plugin @<:@yes@:>@])],
  [plugin_regmon="$enableval"],
  [plugin_regmon="yes"])
AM_CONDITIONAL([PLUGIN_REGMON], [test x$plugin_regmon = xyes])
if test x$plugin_regmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_REGMON, 1, "")
fi

AC_ARG_ENABLE([plugin_procmon],
  [AS_HELP_STRING([--disable-plugin-procmon],
    [Enable the windows process lifecycle watching plugin @<:@yes@:>@])],
  [plugin_procmon="$enableval"],
  [plugin_procmon="yes"])
AM_CONDITIONAL([PLUGIN_PROCMON], [test x$plugin_procmon = xyes])
if test x$plugin_procmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_PROCMON, 1, "")
fi

AC_ARG_ENABLE([plugin_bsodmon],
  [AS_HELP_STRING([--disable-plugin-bsodmon],
    [Enable the windows kernel bugcheck watching plugin @<:@yes@:>@])],
  [plugin_bsodmon="$enableval"],
  [plugin_bsodmon="yes"])
AM_CONDITIONAL([PLUGIN_BSODMON], [test x$plugin_bsodmon = xyes])
if test x$plugin_bsodmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_BSODMON, 1, "")
fi

AC_ARG_ENABLE([plugin_envmon],
  [AS_HELP_STRING([--disable-plugin-envmon],
    [Enable the windows environment watching plugin @<:@yes@:>@])],
  [plugin_envmon="$enableval"],
  [plugin_envmon="yes"])
AM_CONDITIONAL([PLUGIN_ENVMON], [test x$plugin_envmon = xyes])
if test x$plugin_envmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_ENVMON, 1, "")
fi

AC_ARG_ENABLE([plugin_crashmon],
  [AS_HELP_STRING([--disable-plugin-crashmon],
    [Enable the windows error reporting tool WerFault.exe watching plugin @<:@yes@:>@])],
  [plugin_crashmon="$enableval"],
  [plugin_crashmon="yes"])
AM_CONDITIONAL([PLUGIN_CRASHMON], [test x$plugin_crashmon = xyes])
if test x$plugin_crashmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_CRASHMON, 1, "")
fi

AC_ARG_ENABLE([plugin_clipboardmon],
  [AS_HELP_STRING([--disable-plugin-clipboardmon],
    [Enable the clipboard tracing plugin @<:@yes@:>@])],
  [plugin_clipboardmon="$enableval"],
  [plugin_clipboardmon="yes"])
AM_CONDITIONAL([PLUGIN_CLIPBOARDMON], [test x$plugin_clipboardmon = xyes])
if test x$plugin_clipboardmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_CLIPBOARDMON, 1, "")
fi

AC_ARG_ENABLE([plugin_windowmon],
  [AS_HELP_STRING([--disable-plugin-windowmon],
    [Enable the windows tracing plugin @<:@yes@:>@])],
  [plugin_windowmon="$enableval"],
  [plugin_windowmon="yes"])
AM_CONDITIONAL([PLUGIN_WINDOWMON], [test x$plugin_windowmon = xyes])
if test x$plugin_windowmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_WINDOWMON, 1, "")
fi

AC_ARG_ENABLE([plugin_librarymon],
  [AS_HELP_STRING([--disable-plugin-librarymon],
    [Enable the windows library monitor plugin @<:@yes@:>@])],
  [plugin_librarymon="$enableval"],
  [plugin_librarymon="yes"])
AM_CONDITIONAL([PLUGIN_LIBRARYMON], [test x$plugin_librarymon = xyes])
if test x$plugin_librarymon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_LIBRARYMON, 1, "")
fi

AC_ARG_ENABLE([plugin_dkommon],
  [AS_HELP_STRING([--disable-plugin-dkommon],
    [Enable the windows DKOM attacks watching plugin @<:@yes@:>@])],
  [plugin_dkommon="$enableval"],
  [plugin_dkommon="yes"])
AM_CONDITIONAL([PLUGIN_DKOMMON], [test x$plugin_dkommon = xyes])
if test x$plugin_dkommon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_DKOMMON, 1, "")
fi

AC_ARG_ENABLE([plugin_wmimon],
  [AS_HELP_STRING([--disable-plugin-wmimon],
    [Enable the WMI monitor plugin @<:@no@:>@])],
  [plugin_wmimon="$enableval"],
  [plugin_wmimon="no"])
AM_CONDITIONAL([PLUGIN_WMIMON], [test x$plugin_wmimon = xyes])
if test x$plugin_wmimon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_WMIMON, 1, "")
fi

AC_ARG_ENABLE([plugin_memdump],
  [AS_HELP_STRING([--disable-plugin-memdump],
    [Enable the windows memory dumping plugin @<:@yes@:>@])],
  [plugin_memdump="$enableval"],
  [plugin_memdump="yes"])
AM_CONDITIONAL([PLUGIN_MEMDUMP], [test x$plugin_memdump = xyes])
if test x$plugin_memdump = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_MEMDUMP, 1, "")
fi

AC_ARG_ENABLE([plugin_apimon],
  [AS_HELP_STRING([--disable-plugin-apimon],
    [Enable the WinAPI call tracing plugin @<:@yes@:>@])],
  [plugin_apimon="$enableval"],
  [plugin_apimon="yes"])
AM_CONDITIONAL([PLUGIN_APIMON], [test x$plugin_apimon = xyes])
if test x$plugin_apimon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_APIMON, 1, "")
fi

AC_ARG_ENABLE([plugin_procdump],
  [AS_HELP_STRING([--disable-plugin-procdump],
    [Enable the windows process dumping plugin @<:@yes@:>@])],
  [plugin_procdump="$enableval"],
  [plugin_procdump="yes"])
AM_CONDITIONAL([PLUGIN_PROCDUMP], [test x$plugin_procdump = xyes])
if test x$plugin_procdump = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_PROCDUMP, 1, "")
fi

AC_ARG_ENABLE([plugin_rpcmon],
  [AS_HELP_STRING([--disable-plugin-rpcmon],
    [Enable the RPC call tracing plugin @<:@yes@:>@])],
  [plugin_rpcmon="$enableval"],
  [plugin_rpcmon="yes"])
AM_CONDITIONAL([PLUGIN_RPCMON], [test x$plugin_rpcmon = xyes])
if test x$plugin_rpcmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_RPCMON, 1, "")
fi

AC_ARG_ENABLE([plugin_tlsmon],
  [AS_HELP_STRING([--disable-plugin-tlsmon],
    [Enable the RPC call tracing plugin @<:@yes@:>@])],
  [plugin_tlsmon="$enableval"],
  [plugin_tlsmon="yes"])
AM_CONDITIONAL([PLUGIN_TLSMON], [test x$plugin_tlsmon = xyes])
if test x$plugin_tlsmon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_TLSMON, 1, "")
fi

AC_ARG_ENABLE([plugin_codemon],
  [AS_HELP_STRING([--disable-plugin-codemon],
    [Enable the codemon plugin @<:@yes@:>@])],
  [plugin_codemon="$enableval"],
  [plugin_codemon="yes"])
AM_CONDITIONAL([PLUGIN_CODEMON], [test x$plugin_codemon = xyes])
if test x$plugin_codemon = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_CODEMON, 1, "")
fi

AC_ARG_ENABLE([plugin_libhooktest],
  [AS_HELP_STRING([--enable-plugin-libhooktest],
    [Enable libhooktest plugin for testing @<:@no@:>@])],
  [plugin_libhooktest="$enableval"],
  [plugin_libhooktest=""])
AM_CONDITIONAL([PLUGIN_LIBHOOKTEST], [test x$plugin_libhooktest = xyes])
if test x$plugin_libhooktest = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_PLUGIN_LIBHOOKTEST, 1, "")
fi

#####################################################

AC_ARG_ENABLE([repl],
  [AS_HELP_STRING([--enable-repl],
    [Enable the repl library @<:@no@:>@])],
  [repl="$enableval"],
  [repl="no"])
AM_CONDITIONAL([REPL], [test x$repl = xyes])

AC_ARG_ENABLE([hardening],
  [AS_HELP_STRING([--enable-hardening],
    [Enable compiler and linker options to frustrate memory corruption exploits @<:@yes@:>@])],
  [hardening="$enableval"],
  [hardening="yes"])
AM_CONDITIONAL([HARDENING], [test x$hardening = xyes])

AC_ARG_ENABLE([debug],
  [AS_HELP_STRING([--enable-debug],
    [Enable verbose debug output to be compiled @<:@no@:>@])],
  [debug="$enableval"],
  [debug="no"])
AM_CONDITIONAL([DEBUG], [test x$debug = xyes])

AC_ARG_ENABLE([sanitize],
  [AS_HELP_STRING([--enable-sanitize],
    [Enable sanitizers to be compiled @<:@no@:>@])],
  [sanitize="$enableval"],
  [sanitize="no"])
AM_CONDITIONAL([SANITIZE], [test x$sanitize = xyes])

AC_ARG_ENABLE([doppelganging],
  [AS_HELP_STRING([--enable-doppelganging-injection],
    [Enable doppelganging injection @<:@no@:>@])],
  [doppelganging="$enableval"],
  [doppelganging="no"])
if test x$doppelganging = xyes; then
  AC_DEFINE_UNQUOTED(ENABLE_DOPPELGANGING, 1, "")
fi

AC_ARG_WITH([stdlib],
  [AS_HELP_STRING([--with-stdlib=LIB], [specify the C++ standard library to use [default=system]])],
  [], [with_stdlib=system])
AS_IF([test "x$with_stdlib" != "xsystem"],
  [CXXFLAGS="$CXXFLAGS -stdlib=$with_stdlib"])

AC_ARG_ENABLE([ipt],
  [AS_HELP_STRING([--enable-ipt],
    [Enable Intel Processor Trace support (special Xen version required) @<:@no@:>@])],
  [enable_ipt="$enableval"],
  [enable_ipt="no"])
AM_CONDITIONAL([ENABLE_IPT], [test x$enable_ipt = xyes])

#####################################################
# AUTOHARDEN START
# We want to check for compiler flag support, but there is no way to make
# clang's "argument unused" warning fatal.  So we invoke the compiler through a
# wrapper script that greps for this message.
saved_CC="$CC"
saved_CXX="$CXX"
saved_LD="$LD"
flag_wrap="$srcdir/scripts/wrap-compiler-for-flag-check"
CC="$flag_wrap $CC"
CXX="$flag_wrap $CXX"
LD="$flag_wrap $LD"

# We use the same hardening flags for C and C++.  We must check that each flag
# is supported by both compilers.
AC_DEFUN([check_cc_cxx_flag],
 [AC_LANG_PUSH(C)
  AX_CHECK_COMPILE_FLAG([$1],
   [AC_LANG_PUSH(C++)
    AX_CHECK_COMPILE_FLAG([$1], [$2], [$3], [-Werror $4])
    AC_LANG_POP(C++)],
   [$3], [-Werror $4])
  AC_LANG_POP(C)])
AC_DEFUN([check_link_flag],
 [AX_CHECK_LINK_FLAG([$1], [$2], [$3], [-Werror $4])])

HARDEN_CFLAGS=""
HARDEN_LDFLAGS=""
AS_IF([test x"$hardening" != x"no"], [
  check_cc_cxx_flag([-fno-strict-overflow], [HARDEN_CFLAGS="$HARDEN_CFLAGS -fno-strict-overflow"])

# This one will likely succeed, even on platforms where it does nothing.
  check_cc_cxx_flag([-D_FORTIFY_SOURCE=2 -O2], [HARDEN_CFLAGS="$HARDEN_CFLAGS -D_FORTIFY_SOURCE=2 -O2"])

  check_cc_cxx_flag([-fstack-protector-all],
   [check_link_flag([-fstack-protector-all],
     [HARDEN_CFLAGS="$HARDEN_CFLAGS -fstack-protector-all"
      check_cc_cxx_flag([-Wstack-protector], [HARDEN_CFLAGS="$HARDEN_CFLAGS -Wstack-protector"],
        [], [-fstack-protector-all])
      check_cc_cxx_flag([--param ssp-buffer-size=1], [HARDEN_CFLAGS="$HARDEN_CFLAGS --param ssp-buffer-size=1"],
        [], [-fstack-protector-all])])])

  # At the link step, we might want -pie (GCC) or -Wl,-pie (Clang on OS X)
  #
  # The linker checks also compile code, so we need to include -fPIE as well.
  check_cc_cxx_flag([-fPIE],
   [check_link_flag([-fPIE -pie],
     [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
      HARDEN_LDFLAGS="$HARDEN_LDFLAGS -pie"],
     [check_link_flag([-fPIE -Wl,-pie],
       [HARDEN_CFLAGS="$HARDEN_CFLAGS -fPIE"
        HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-pie"])])])

  check_link_flag([-Wl,-z,noexecstack],
   [HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-z,noexecstack"])
  check_link_flag([-Wl,-z,relro],
   [HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-z,relro"])
  check_link_flag([-Wl,-z,now],
   [HARDEN_LDFLAGS="$HARDEN_LDFLAGS -Wl,-z,now"])
])

AC_SUBST([HARDEN_CFLAGS])
AC_SUBST([HARDEN_LDFLAGS])

# End of flag tests.
CC="$saved_CC"
CXX="$saved_CXX"
LD="$saved_LD"
# AUTOHARDEN END
#####################################################

#####################################################
# AUTOSANITIZE START

saved_CC="$CC"
saved_CXX="$CXX"
saved_LD="$LD"
flag_wrap="$srcdir/scripts/wrap-compiler-for-flag-check"
CC="$flag_wrap $CC"
CXX="$flag_wrap $CXX"
LD="$flag_wrap $LD"

SANITIZE_CFLAGS=""
SANITIZE_CXXFLAGS=""
SANITIZE_LDFLAGS=""

AS_IF([test x"$fsanitize" != x"no"], [
  check_cc_cxx_flag([-fno-omit-frame-pointer],
   [check_link_flag([-fno-omit-frame-pointer],
     [SANITIZE_CFLAGS="$SANITIZE_CFLAGS -fno-omit-frame-pointer"
      SANITIZE_CXXFLAGS="$SANITIZE_CXXFLAGS -fno-omit-frame-pointer"
      SANITIZE_LDFLAGS="$SANITIZE_LDFLAGS -fno-omit-frame-pointer"])])

  check_cc_cxx_flag([-fsanitize=address],
   [check_link_flag([-fsanitize=address],
     [SANITIZE_CFLAGS="$SANITIZE_CFLAGS -fsanitize=address"
      SANITIZE_CXXFLAGS="$SANITIZE_CXXFLAGS -fsanitize=address"
      SANITIZE_LDFLAGS="$SANITIZE_LDFLAGS -fsanitize=address"])])

  check_cc_cxx_flag([-fsanitize=leak],
   [check_link_flag([-fsanitize=leak],
     [SANITIZE_CFLAGS="$SANITIZE_CFLAGS -fsanitize=leak"
      SANITIZE_CXXFLAGS="$SANITIZE_CXXFLAGS -fsanitize=leak"
      SANITIZE_LDFLAGS="$SANITIZE_LDFLAGS -fsanitize=leak"])])

  check_cc_cxx_flag([-fsanitize=undefined],
   [check_link_flag([-fsanitize=undefined],
     [SANITIZE_CFLAGS="$SANITIZE_CFLAGS -fsanitize=undefined"
      SANITIZE_CXXFLAGS="$SANITIZE_CXXFLAGS -fsanitize=undefined"
      SANITIZE_LDFLAGS="$SANITIZE_LDFLAGS -fsanitize=undefined"])])
])

AC_SUBST([SANITIZE_CFLAGS])
AC_SUBST([SANITIZE_CXXFLAGS])
AC_SUBST([SANITIZE_LDFLAGS])

# End of flag tests.
CC="$saved_CC"
CXX="$saved_CXX"
LD="$saved_LD"
# AUTOSANITIZE END
#####################################################

AC_HEADER_STDC
AC_CHECK_HEADERS([fcntl.h malloc.h stdio.h stdlib.h string.h sys/time.h sys/mman.h sys/inotify.h unistd.h errno.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_HEADER_STDBOOL
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM

# Checks for library functions.
AC_FUNC_MALLOC

# Make sure we get standard PRI... definitions.
AH_VERBATIM([__STDC_FORMAT_MACROS],
            [/* C99 says: define this to get the PRI... macros from stdint.h */
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS 1
#endif])

PKG_CHECK_MODULES([GLIB], [glib-2.0 >= 2.28], [], [AC_ERROR([glib-2.0 (version 2.28+) has to be installed!])])
PKG_CHECK_MODULES([VMI], [libvmi >= 0.11], [], [AC_ERROR([LibVMI not found])])
PKG_CHECK_MODULES([JSONC], [json-c >= 0.15], [AC_DEFINE([JSONC5], [1], [json-c5 installed])],
    [PKG_CHECK_MODULES([JSONC], [json-c], [], [AC_ERROR([libjson-c not found])])])
AS_IF([test x$plugin_procdump == xyes],
    [PKG_CHECK_MODULES([ZLIB],[zlib], [], [AC_ERROR([zlib not found])])])
PKG_CHECK_MODULES([LIBXC], [xencontrol], [], [AC_ERROR([libxc not found])])
PKG_CHECK_MODULES([LIBXL], [xenlight], [], [AC_ERROR([libxl not found])])
PKG_CHECK_MODULES([XENFMEM], [xenforeignmemory], [], [AC_ERROR([xenforeignmemory not found])])
PKG_CHECK_MODULES([XENTOOLLOG], [xentoollog], [], [AC_ERROR([xentoollog not found])])

if test x$repl = xyes; then
  PKG_CHECK_MODULES([PYTHON3], [python3])
  PKG_CHECK_MODULES([PYTHON3_EMBED], [python3-embed], [], [AC_MSG_NOTICE(python3-embed not found)])
  AC_PATH_PROG(PYTHON3, python3, nopython)
  AS_IF([test "$ac_cv_path_PYTHON3" = "nopython"],
    AC_MSG_ERROR([could not find python or python3]),
    [
      PYTHON_CFLAGS=`${PYTHON3}-config --includes`
	  AC_SUBST([PYTHON_CFLAGS])
      PYTHON_LIBS=`${PYTHON3}-config --libs`
	  AC_SUBST([PYTHON_LIBS])
	]
  )

  AC_PATH_PROG([CTYPESGEN], [ctypesgen], [])
  AS_IF([test x"$CTYPESGEN" = x],
    AC_MSG_ERROR([could not find ctypesgen])
  )

  AC_DEFINE_UNQUOTED(ENABLE_REPL, 1, "")
fi

#####################################################

AC_CONFIG_FILES([Makefile src/Makefile
                 src/libdrakvuf/Makefile
                 src/libinjector/Makefile
                 src/xen_helper/Makefile
                 src/plugins/Makefile
                 src/dirwatch/Makefile
                 src/libusermode/Makefile
                 src/librepl/Makefile
                 src/libhook/Makefile
               ])

AC_OUTPUT

AC_MSG_RESULT([-------------------------------------------------------------------------------
DRAKVUF is configured as follows. Please verify that this configuration
matches your expectations.

Host system type: $host
Build system type: $build
Installation prefix: $prefix
-------------------------------------------------------------------------------
DRAKVUF Plugins
Syscalls:     $plugin_syscalls
Poolmon:      $plugin_poolmon
Filetracer:   $plugin_filetracer
Filedelete:   $plugin_filedelete
Objmon:       $plugin_objmon
Exmon:        $plugin_exmon
SSDTmon:      $plugin_ssdtmon
CPUIDmon:     $plugin_cpuidmon
Debugmon:     $plugin_debugmon
Socketmon:    $plugin_socketmon
Regmon:       $plugin_regmon
Procmon:      $plugin_procmon
BSODmon:      $plugin_bsodmon
EnvMon:       $plugin_envmon
CrashMon:     $plugin_crashmon
ClipboardMon: $plugin_clipboardmon
WindowMon:    $plugin_windowmon
LibraryMon:   $plugin_librarymon
DKOMmon:      $plugin_dkommon
MEMDump:      $plugin_memdump
ProcDump:     $plugin_procdump
APIMon:       $plugin_apimon
RPCMon:       $plugin_rpcmon
TLSMon:       $plugin_tlsmon
Codemon:      $plugin_codemon
LibHookTest:  $plugin_libhooktest
-------------------------------------------------------------------------------
Deprecated Plugins
WMIMon:       $plugin_wmimon
-------------------------------------------------------------------------------
REPL:         $repl
-------------------------------------------------------------------------------])