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https://github.com/reactos/CMake.git
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58b2d760ee
Convert several preformatted code block literals that enumerate lists of options or variables to use reST definition lists instead. Manually wrap other long lines in code blocks.
102 lines
3.7 KiB
CMake
102 lines
3.7 KiB
CMake
#.rst:
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# FindBacktrace
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# -------------
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#
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# Find provider for backtrace(3).
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#
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# Checks if OS supports backtrace(3) via either libc or custom library.
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# This module defines the following variables:
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#
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# ``Backtrace_HEADER``
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# The header file needed for backtrace(3). Cached.
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# Could be forcibly set by user.
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# ``Backtrace_INCLUDE_DIRS``
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# The include directories needed to use backtrace(3) header.
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# ``Backtrace_LIBRARIES``
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# The libraries (linker flags) needed to use backtrace(3), if any.
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# ``Backtrace_FOUND``
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# Is set if and only if backtrace(3) support detected.
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#
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# The following cache variables are also available to set or use:
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#
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# ``Backtrace_LIBRARY``
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# The external library providing backtrace, if any.
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# ``Backtrace_INCLUDE_DIR``
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# The directory holding the backtrace(3) header.
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#
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# Typical usage is to generate of header file using configure_file() with the
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# contents like the following::
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#
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# #cmakedefine01 Backtrace_FOUND
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# #if Backtrace_FOUND
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# # include <${Backtrace_HEADER}>
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# #endif
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#
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# And then reference that generated header file in actual source.
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#=============================================================================
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# Copyright 2013 Vadim Zhukov
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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include(CMakePushCheckState)
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include(CheckSymbolExists)
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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# List of variables to be provided to find_package_handle_standard_args()
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set(_Backtrace_STD_ARGS Backtrace_INCLUDE_DIR)
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if(Backtrace_HEADER)
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set(_Backtrace_HEADER_TRY "${Backtrace_HEADER}")
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else(Backtrace_HEADER)
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set(_Backtrace_HEADER_TRY "execinfo.h")
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endif(Backtrace_HEADER)
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find_path(Backtrace_INCLUDE_DIR "${_Backtrace_HEADER_TRY}")
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set(Backtrace_INCLUDE_DIRS ${Backtrace_INCLUDE_DIR})
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if (NOT DEFINED Backtrace_LIBRARY)
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# First, check if we already have backtrace(), e.g., in libc
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cmake_push_check_state(RESET)
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set(CMAKE_REQUIRED_INCLUDES ${Backtrace_INCLUDE_DIRS})
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set(CMAKE_REQUIRED_QUIET ${Backtrace_FIND_QUIETLY})
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check_symbol_exists("backtrace" "${_Backtrace_HEADER_TRY}" _Backtrace_SYM_FOUND)
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cmake_pop_check_state()
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endif()
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if(_Backtrace_SYM_FOUND)
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# Avoid repeating the message() call below each time CMake is run.
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if(NOT Backtrace_FIND_QUIETLY AND NOT DEFINED Backtrace_LIBRARY)
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message(STATUS "backtrace facility detected in default set of libraries")
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endif()
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set(Backtrace_LIBRARY "" CACHE FILEPATH "Library providing backtrace(3), empty for default set of libraries")
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else()
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# Check for external library, for non-glibc systems
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if(Backtrace_INCLUDE_DIR)
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# OpenBSD has libbacktrace renamed to libexecinfo
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find_library(Backtrace_LIBRARY "execinfo")
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elseif() # respect user wishes
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set(_Backtrace_HEADER_TRY "backtrace.h")
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find_path(Backtrace_INCLUDE_DIR ${_Backtrace_HEADER_TRY})
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find_library(Backtrace_LIBRARY "backtrace")
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endif()
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# Prepend list with library path as it's more common practice
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set(_Backtrace_STD_ARGS Backtrace_LIBRARY ${_Backtrace_STD_ARGS})
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endif()
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set(Backtrace_LIBRARIES ${Backtrace_LIBRARY})
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set(Backtrace_HEADER "${_Backtrace_HEADER_TRY}" CACHE STRING "Header providing backtrace(3) facility")
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find_package_handle_standard_args(Backtrace FOUND_VAR Backtrace_FOUND REQUIRED_VARS ${_Backtrace_STD_ARGS})
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mark_as_advanced(Backtrace_HEADER Backtrace_INCLUDE_DIR Backtrace_LIBRARY)
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