cmake_minimum_required(VERSION 2.8)
project(LLBROWSE)

set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules/")

# Macros we'll need
include(FindwxWidgets)
include(CheckIncludeFile)
include(CheckIncludeFileCXX)
include(CheckCXXSourceCompiles)

# Check for the existence of include files.
check_include_file(assert.h HAVE_ASSERT_H)
check_include_file(auto_ptr.h HAVE_AUTO_PTR_H)
check_include_file_cxx(memory HAVE_MEMORY)
check_include_file_cxx(llvm/Support/Signals.h HAVE_LLVM_SUPPORT_SIGNALS_H)

# Find WxWidgets
if (CMAKE_BUILD_TYPE STREQUAL Debug)
  set(wxWidgets_USE_DEBUG ON CACHE BOOL "Use wxWidgets Debugging")
endif (CMAKE_BUILD_TYPE STREQUAL Debug)
set(wxWidgets_USE_UNICODE true)
find_package(wxWidgets REQUIRED core base)
include(${wxWidgets_USE_FILE})

# Find LLVM
find_package(LLVM REQUIRED)

# Definitions needed by LLVM headers
if (NOT ${COMPILE_DEFINITIONS} MATCHES ".*__STDC_LIMIT_MACROS.*")
  add_definitions(
      -D__STDC_LIMIT_MACROS
      -D__STDC_CONSTANT_MACROS
      -D_GNU_SOURCE)
endif (NOT ${COMPILE_DEFINITIONS} MATCHES ".*__STDC_LIMIT_MACROS.*")

# Include directory paths
include_directories(${CMAKE_CURRENT_BINARY_DIR})
include_directories(${LLBROWSE_SOURCE_DIR}/include)
include_directories(${LLVM_INCLUDE_DIR})

# Check for LLVM 2.9 features
check_cxx_source_compiles("
  #include <llvm/Type.h>
  int main() {
    llvm::Type::TypeID id = llvm::Type::X86_FP80TyID;
    return 0;
  }"
  HAVE_LLVM_TYPE_X86_FP80TY_ID)
check_cxx_source_compiles("
  #include <llvm/Analysis/DebugInfo.h>
  int main() {
    llvm::DISubprogram sp;
    return sp.isPrivate() ? 0 : 1;
  }"
  HAVE_LLVM_DISUBPROGRAM_IS_PRIVATE)

# Generate the config.h file
configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/config.h.in
    ${CMAKE_CURRENT_BINARY_DIR}/config.h)

file(GLOB LLBROWSE_SOURCES lib/*.cpp)
file(GLOB LLBROWSE_HEADERS include/llbrowse/*.h)

# Set up the resources target
# Set the list of resource to be the empty list initially.
set(RESOURCES)

# Convert PNG image resources to embeddable header files.
file(GLOB PNG_RESOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} resources/icons/*.png)
file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/resources/icons")
foreach(IN_FILE ${PNG_RESOURCES})
  string(REGEX REPLACE ".png\$" ".png.h" OUT_FILE "${IN_FILE}")
  set(ABS_IN_FILE "${CMAKE_CURRENT_SOURCE_DIR}/${IN_FILE}")
  set(ABS_OUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${OUT_FILE}")
  add_custom_command(
      OUTPUT ${ABS_OUT_FILE}
      MAIN_DEPENDENCY ${ABS_IN_FILE}
      COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/scripts/png2c" ${ABS_IN_FILE}
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/resources/icons
      COMMENT "Converting PNG image file ${IN_FILE}")
  set(RESOURCES ${RESOURCES} "${ABS_OUT_FILE}")
endforeach(IN_FILE)

# Declare the llbrowse executable
add_executable(llbrowse MACOSX_BUNDLE ${LLBROWSE_SOURCES} ${LLBROWSE_HEADERS} ${RESOURCES})
target_link_libraries(llbrowse ${wxWidgets_LIBRARIES} ${LLVM_MODULE_LIBS})
set_target_properties(llbrowse PROPERTIES
    COMPILE_FLAGS ${LLVM_CFLAGS}
    LINK_FLAGS ${LLVM_LFLAGS})

install(TARGETS llbrowse RUNTIME DESTINATION bin BUNDLE DESTINATION lib)