91 lines
3.2 KiB
CMake
91 lines
3.2 KiB
CMake
|
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
||
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
||
|
|
|
||
|
|
#.rst:
|
||
|
|
# FindBacktrace
|
||
|
|
# -------------
|
||
|
|
#
|
||
|
|
# Find provider for backtrace(3).
|
||
|
|
#
|
||
|
|
# Checks if OS supports backtrace(3) via either libc or custom library.
|
||
|
|
# This module defines the following variables:
|
||
|
|
#
|
||
|
|
# ``Backtrace_HEADER``
|
||
|
|
# The header file needed for backtrace(3). Cached.
|
||
|
|
# Could be forcibly set by user.
|
||
|
|
# ``Backtrace_INCLUDE_DIRS``
|
||
|
|
# The include directories needed to use backtrace(3) header.
|
||
|
|
# ``Backtrace_LIBRARIES``
|
||
|
|
# The libraries (linker flags) needed to use backtrace(3), if any.
|
||
|
|
# ``Backtrace_FOUND``
|
||
|
|
# Is set if and only if backtrace(3) support detected.
|
||
|
|
#
|
||
|
|
# The following cache variables are also available to set or use:
|
||
|
|
#
|
||
|
|
# ``Backtrace_LIBRARY``
|
||
|
|
# The external library providing backtrace, if any.
|
||
|
|
# ``Backtrace_INCLUDE_DIR``
|
||
|
|
# The directory holding the backtrace(3) header.
|
||
|
|
#
|
||
|
|
# Typical usage is to generate of header file using configure_file() with the
|
||
|
|
# contents like the following::
|
||
|
|
#
|
||
|
|
# #cmakedefine01 Backtrace_FOUND
|
||
|
|
# #if Backtrace_FOUND
|
||
|
|
# # include <${Backtrace_HEADER}>
|
||
|
|
# #endif
|
||
|
|
#
|
||
|
|
# And then reference that generated header file in actual source.
|
||
|
|
|
||
|
|
include(CMakePushCheckState)
|
||
|
|
include(CheckSymbolExists)
|
||
|
|
include(FindPackageHandleStandardArgs)
|
||
|
|
|
||
|
|
# List of variables to be provided to find_package_handle_standard_args()
|
||
|
|
set(_Backtrace_STD_ARGS Backtrace_INCLUDE_DIR)
|
||
|
|
|
||
|
|
if(Backtrace_HEADER)
|
||
|
|
set(_Backtrace_HEADER_TRY "${Backtrace_HEADER}")
|
||
|
|
else(Backtrace_HEADER)
|
||
|
|
set(_Backtrace_HEADER_TRY "execinfo.h")
|
||
|
|
endif(Backtrace_HEADER)
|
||
|
|
|
||
|
|
find_path(Backtrace_INCLUDE_DIR "${_Backtrace_HEADER_TRY}")
|
||
|
|
set(Backtrace_INCLUDE_DIRS ${Backtrace_INCLUDE_DIR})
|
||
|
|
|
||
|
|
if (NOT DEFINED Backtrace_LIBRARY)
|
||
|
|
# First, check if we already have backtrace(), e.g., in libc
|
||
|
|
cmake_push_check_state(RESET)
|
||
|
|
set(CMAKE_REQUIRED_INCLUDES ${Backtrace_INCLUDE_DIRS})
|
||
|
|
set(CMAKE_REQUIRED_QUIET ${Backtrace_FIND_QUIETLY})
|
||
|
|
check_symbol_exists("backtrace" "${_Backtrace_HEADER_TRY}" _Backtrace_SYM_FOUND)
|
||
|
|
cmake_pop_check_state()
|
||
|
|
endif()
|
||
|
|
|
||
|
|
if(_Backtrace_SYM_FOUND)
|
||
|
|
# Avoid repeating the message() call below each time CMake is run.
|
||
|
|
if(NOT Backtrace_FIND_QUIETLY AND NOT DEFINED Backtrace_LIBRARY)
|
||
|
|
message(STATUS "backtrace facility detected in default set of libraries")
|
||
|
|
endif()
|
||
|
|
set(Backtrace_LIBRARY "" CACHE FILEPATH "Library providing backtrace(3), empty for default set of libraries")
|
||
|
|
else()
|
||
|
|
# Check for external library, for non-glibc systems
|
||
|
|
if(Backtrace_INCLUDE_DIR)
|
||
|
|
# OpenBSD has libbacktrace renamed to libexecinfo
|
||
|
|
find_library(Backtrace_LIBRARY "execinfo")
|
||
|
|
elseif() # respect user wishes
|
||
|
|
set(_Backtrace_HEADER_TRY "backtrace.h")
|
||
|
|
find_path(Backtrace_INCLUDE_DIR ${_Backtrace_HEADER_TRY})
|
||
|
|
find_library(Backtrace_LIBRARY "backtrace")
|
||
|
|
endif()
|
||
|
|
|
||
|
|
# Prepend list with library path as it's more common practice
|
||
|
|
set(_Backtrace_STD_ARGS Backtrace_LIBRARY ${_Backtrace_STD_ARGS})
|
||
|
|
endif()
|
||
|
|
|
||
|
|
set(Backtrace_LIBRARIES ${Backtrace_LIBRARY})
|
||
|
|
set(Backtrace_HEADER "${_Backtrace_HEADER_TRY}" CACHE STRING "Header providing backtrace(3) facility")
|
||
|
|
|
||
|
|
find_package_handle_standard_args(Backtrace FOUND_VAR Backtrace_FOUND REQUIRED_VARS ${_Backtrace_STD_ARGS})
|
||
|
|
mark_as_advanced(Backtrace_HEADER Backtrace_INCLUDE_DIR Backtrace_LIBRARY)
|