--- /dev/null
+#
+# BackwardMacros.cmake
+# Copyright 2013 Google Inc. All Rights Reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+###############################################################################
+# OPTIONS
+###############################################################################
+
+set(STACK_WALKING_UNWIND TRUE CACHE BOOL
+ "Use compiler's unwind API")
+set(STACK_WALKING_BACKTRACE FALSE CACHE BOOL
+ "Use backtrace from (e)glibc for stack walking")
+
+set(STACK_DETAILS_AUTO_DETECT TRUE CACHE BOOL
+ "Auto detect backward's stack details dependencies")
+
+set(STACK_DETAILS_BACKTRACE_SYMBOL FALSE CACHE BOOL
+ "Use backtrace from (e)glibc for symbols resolution")
+set(STACK_DETAILS_DW FALSE CACHE BOOL
+ "Use libdw to read debug info")
+set(STACK_DETAILS_BFD FALSE CACHE BOOL
+ "Use libbfd to read debug info")
+set(STACK_DETAILS_DWARF FALSE CACHE BOOL
+ "Use libdwarf/libelf to read debug info")
+
+set(BACKWARD_TESTS FALSE CACHE BOOL "Enable tests")
+
+###############################################################################
+# CONFIGS
+###############################################################################
+if (${STACK_DETAILS_AUTO_DETECT})
+ include(FindPackageHandleStandardArgs)
+
+ # find libdw
+ find_path(LIBDW_INCLUDE_DIR NAMES "elfutils/libdw.h" "elfutils/libdwfl.h")
+ find_library(LIBDW_LIBRARY dw)
+ set(LIBDW_INCLUDE_DIRS ${LIBDW_INCLUDE_DIR} )
+ set(LIBDW_LIBRARIES ${LIBDW_LIBRARY} )
+ find_package_handle_standard_args(libdw DEFAULT_MSG
+ LIBDW_LIBRARY LIBDW_INCLUDE_DIR)
+ mark_as_advanced(LIBDW_INCLUDE_DIR LIBDW_LIBRARY)
+
+ # find libbfd
+ find_path(LIBBFD_INCLUDE_DIR NAMES "bfd.h")
+ find_path(LIBDL_INCLUDE_DIR NAMES "dlfcn.h")
+ find_library(LIBBFD_LIBRARY bfd)
+ find_library(LIBDL_LIBRARY dl)
+ set(LIBBFD_INCLUDE_DIRS ${LIBBFD_INCLUDE_DIR} ${LIBDL_INCLUDE_DIR})
+ set(LIBBFD_LIBRARIES ${LIBBFD_LIBRARY} ${LIBDL_LIBRARY})
+ find_package_handle_standard_args(libbfd DEFAULT_MSG
+ LIBBFD_LIBRARY LIBBFD_INCLUDE_DIR
+ LIBDL_LIBRARY LIBDL_INCLUDE_DIR)
+ mark_as_advanced(LIBBFD_INCLUDE_DIR LIBBFD_LIBRARY
+ LIBDL_INCLUDE_DIR LIBDL_LIBRARY)
+
+ # find libdwarf
+ find_path(LIBDWARF_INCLUDE_DIR NAMES "libdwarf.h" PATH_SUFFIXES libdwarf)
+ find_path(LIBELF_INCLUDE_DIR NAMES "libelf.h")
+ find_path(LIBDL_INCLUDE_DIR NAMES "dlfcn.h")
+ find_library(LIBDWARF_LIBRARY dwarf)
+ find_library(LIBELF_LIBRARY elf)
+ find_library(LIBDL_LIBRARY dl)
+ set(LIBDWARF_INCLUDE_DIRS ${LIBDWARF_INCLUDE_DIR} ${LIBELF_INCLUDE_DIR} ${LIBDL_INCLUDE_DIR})
+ set(LIBDWARF_LIBRARIES ${LIBDWARF_LIBRARY} ${LIBELF_LIBRARY} ${LIBDL_LIBRARY})
+ find_package_handle_standard_args(libdwarf DEFAULT_MSG
+ LIBDWARF_LIBRARY LIBDWARF_INCLUDE_DIR
+ LIBELF_LIBRARY LIBELF_INCLUDE_DIR
+ LIBDL_LIBRARY LIBDL_INCLUDE_DIR)
+ mark_as_advanced(LIBDWARF_INCLUDE_DIR LIBDWARF_LIBRARY
+ LIBELF_INCLUDE_DIR LIBELF_LIBRARY
+ LIBDL_INCLUDE_DIR LIBDL_LIBRARY)
+
+ if (LIBDW_FOUND)
+ LIST(APPEND _BACKWARD_INCLUDE_DIRS ${LIBDW_INCLUDE_DIRS})
+ LIST(APPEND _BACKWARD_LIBRARIES ${LIBDW_LIBRARIES})
+ set(STACK_DETAILS_DW TRUE)
+ set(STACK_DETAILS_BFD FALSE)
+ set(STACK_DETAILS_DWARF FALSE)
+ set(STACK_DETAILS_BACKTRACE_SYMBOL FALSE)
+ elseif(LIBBFD_FOUND)
+ LIST(APPEND _BACKWARD_INCLUDE_DIRS ${LIBBFD_INCLUDE_DIRS})
+ LIST(APPEND _BACKWARD_LIBRARIES ${LIBBFD_LIBRARIES})
+
+ # If we attempt to link against static bfd, make sure to link its dependencies, too
+ get_filename_component(bfd_lib_ext "${LIBBFD_LIBRARY}" EXT)
+ if (bfd_lib_ext STREQUAL "${CMAKE_STATIC_LIBRARY_SUFFIX}")
+ list(APPEND _BACKWARD_LIBRARIES iberty z)
+ endif()
+
+ set(STACK_DETAILS_DW FALSE)
+ set(STACK_DETAILS_BFD TRUE)
+ set(STACK_DETAILS_DWARF FALSE)
+ set(STACK_DETAILS_BACKTRACE_SYMBOL FALSE)
+ elseif(LIBDWARF_FOUND)
+ LIST(APPEND _BACKWARD_INCLUDE_DIRS ${LIBDWARF_INCLUDE_DIRS})
+ LIST(APPEND BACKWARD_LIBRARIES ${LIBDWARF_LIBRARIES})
+
+ set(STACK_DETAILS_DW FALSE)
+ set(STACK_DETAILS_BFD FALSE)
+ set(STACK_DETAILS_DWARF TRUE)
+ set(STACK_DETAILS_BACKTRACE_SYMBOL FALSE)
+ else()
+ set(STACK_DETAILS_DW FALSE)
+ set(STACK_DETAILS_BFD FALSE)
+ set(STACK_DETAILS_DWARF FALSE)
+ set(STACK_DETAILS_BACKTRACE_SYMBOL TRUE)
+ endif()
+else()
+ if (STACK_DETAILS_DW)
+ LIST(APPEND _BACKWARD_LIBRARIES dw)
+ endif()
+
+ if (STACK_DETAILS_BFD)
+ LIST(APPEND _BACKWARD_LIBRARIES bfd dl)
+ endif()
+
+ if (STACK_DETAILS_DWARF)
+ LIST(APPEND _BACKWARD_LIBRARIES dwarf elf)
+ endif()
+endif()
+
+macro(map_definitions var_prefix define_prefix)
+ foreach(def ${ARGN})
+ if (${${var_prefix}${def}})
+ LIST(APPEND _BACKWARD_DEFINITIONS "${define_prefix}${def}=1")
+ else()
+ LIST(APPEND _BACKWARD_DEFINITIONS "${define_prefix}${def}=0")
+ endif()
+ endforeach()
+endmacro()
+
+if (NOT _BACKWARD_DEFINITIONS)
+ map_definitions("STACK_WALKING_" "BACKWARD_HAS_" UNWIND BACKTRACE)
+ map_definitions("STACK_DETAILS_" "BACKWARD_HAS_" BACKTRACE_SYMBOL DW BFD DWARF)
+endif()
+
+set(BACKWARD_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}")
+
+set(BACKWARD_HAS_EXTERNAL_LIBRARIES FALSE)
+set(FIND_PACKAGE_REQUIRED_VARS BACKWARD_INCLUDE_DIR)
+if(DEFINED _BACKWARD_LIBRARIES)
+ set(BACKWARD_HAS_EXTERNAL_LIBRARIES TRUE)
+ list(APPEND FIND_PACKAGE_REQUIRED_VARS _BACKWARD_LIBRARIES)
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Backward
+ REQUIRED_VARS ${FIND_PACKAGE_REQUIRED_VARS}
+)
+list(APPEND _BACKWARD_INCLUDE_DIRS ${BACKWARD_INCLUDE_DIR})
+
+macro(add_backward target)
+ target_include_directories(${target} PRIVATE ${BACKWARD_INCLUDE_DIRS})
+ set_property(TARGET ${target} APPEND PROPERTY COMPILE_DEFINITIONS ${BACKWARD_DEFINITIONS})
+ set_property(TARGET ${target} APPEND PROPERTY LINK_LIBRARIES ${BACKWARD_LIBRARIES})
+endmacro()
+
+set(BACKWARD_INCLUDE_DIRS ${_BACKWARD_INCLUDE_DIRS} CACHE INTERNAL "_BACKWARD_INCLUDE_DIRS")
+set(BACKWARD_DEFINITIONS ${_BACKWARD_DEFINITIONS} CACHE INTERNAL "BACKWARD_DEFINITIONS")
+set(BACKWARD_LIBRARIES ${_BACKWARD_LIBRARIES} CACHE INTERNAL "BACKWARD_LIBRARIES")
+mark_as_advanced(BACKWARD_INCLUDE_DIRS BACKWARD_DEFINITIONS BACKWARD_LIBRARIES)
+
+# Expand each definition in BACKWARD_DEFINITIONS to its own cmake var and export
+# to outer scope
+foreach(var ${BACKWARD_DEFINITIONS})
+ string(REPLACE "=" ";" var_as_list ${var})
+ list(GET var_as_list 0 var_name)
+ list(GET var_as_list 1 var_value)
+ set(${var_name} ${var_value})
+ mark_as_advanced(${var_name})
+endforeach()
+
+if (NOT TARGET Backward::Backward)
+ add_library(Backward::Backward INTERFACE IMPORTED)
+ set_target_properties(Backward::Backward PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${BACKWARD_INCLUDE_DIRS}"
+ INTERFACE_COMPILE_DEFINITIONS "${BACKWARD_DEFINITIONS}"
+ )
+ if(BACKWARD_HAS_EXTERNAL_LIBRARIES)
+ set_target_properties(Backward::Backward PROPERTIES
+ INTERFACE_LINK_LIBRARIES "${BACKWARD_LIBRARIES}"
+ )
+ endif()
+endif()
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