# This file contains all the logic for running configure-time checks

include(CheckSymbolExists)
include(CheckIncludeFile)
include(CheckIncludeFiles)
include(CheckLibraryExists)

set(CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE)
check_symbol_exists(ppoll poll.h HAVE_PPOLL)
set(CMAKE_REQUIRED_DEFINITIONS)
check_symbol_exists(sigaction signal.h HAVE_SIGACTION)
check_cxx_symbol_exists(accept4 "sys/socket.h" HAVE_ACCEPT4)

check_include_file(termios.h HAVE_TERMIOS_H)
check_include_files("sys/types.h;sys/event.h" HAVE_SYS_EVENT_H)

check_cxx_source_compiles("
  #include <sys/uio.h>
  int main() { process_vm_readv(0, nullptr, 0, nullptr, 0, 0); return 0; }"
  HAVE_PROCESS_VM_READV)
check_cxx_source_compiles("
    #include <sys/syscall.h>
    int main() { return __NR_process_vm_readv; }"
    HAVE_NR_PROCESS_VM_READV)

check_library_exists(compression compression_encode_buffer "" HAVE_LIBCOMPRESSION)

# These checks exist in LLVM's configuration, so I want to match the LLVM names
# so that the check isn't duplicated, but we translate them into the LLDB names
# so that I don't have to change all the uses at the moment.
set(LLDB_CONFIG_TERMIOS_SUPPORTED ${HAVE_TERMIOS_H})
if(NOT UNIX)
  set(LLDB_DISABLE_POSIX 1)
endif()

if(NOT LLDB_CONFIG_HEADER_INPUT)
 set(LLDB_CONFIG_HEADER_INPUT ${LLDB_INCLUDE_ROOT}/lldb/Host/Config.h.cmake)
endif()

if(NOT LLDB_CONFIG_HEADER_OUTPUT)
 set(LLDB_CONFIG_HEADER_OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/include/lldb/Host/Config.h)
endif()

# This should be done at the end
configure_file(
  ${LLDB_CONFIG_HEADER_INPUT}
  ${LLDB_CONFIG_HEADER_OUTPUT}
  )