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# Ceres Solver - A fast non-linear least squares minimizer
# Copyright 2023 Google Inc. All rights reserved.
# http://ceres-solver.org/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of Google Inc. nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Author: alexs.mac@gmail.com (Alex Stewart)
# Usage: enable_sanitizer(REQUIRED_SANITIZERS) where REQUIRED_SANITIZERS should
# contain the list of sanitizers to enable by updating CMAKE_CXX_FLAGS and
# CMAKE_EXE_LINKER_FLAGS.
#
# The specified sanitizers will be checked both for compatibility with the
# current compiler and with each other as some sanitizers are mutually
# exclusive.
macro(enable_sanitizer)
# According to the Clang documentation [1] the following sanitizers are
# mututally exclusive.
# [1]: https://clang.llvm.org/docs/UsersManual.html#controlling-code-generation
set(INCOMPATIBLE_SANITIZERS address thread memory)
# Set the recommended additional common compile flags for any sanitizer to
# get the best possible output, e.g [2] but make them visible in the cache
# so that the user can edit them if required.
# [2]: https://clang.llvm.org/docs/AddressSanitizer.html#usage
set(COMMON_SANITIZER_COMPILE_OPTIONS
"-g -fno-omit-frame-pointer -fno-optimize-sibling-calls"
CACHE STRING "Common compile flags enabled for any sanitizer")
# Check that the specified list of sanitizers to enable does not include
# multiple entries from the incompatible list.
set(MERGED_SANITIZERS ${ARGN} ${INCOMPATIBLE_SANITIZERS})
list(LENGTH MERGED_SANITIZERS COMBINED_LENGTH)
list(REMOVE_DUPLICATES MERGED_SANITIZERS)
list(LENGTH MERGED_SANITIZERS COMBINED_LENGTH_NO_DUPLICATES)
math(EXPR VALID_LENGTH "${COMBINED_LENGTH} - 1")
if (COMBINED_LENGTH_NO_DUPLICATES LESS VALID_LENGTH)
include(PrettyPrintCMakeList)
pretty_print_cmake_list(REQUESTED_SANITIZERS ${ARGN})
pretty_print_cmake_list(
PRETTY_INCOMPATIBLE_SANITIZERS ${INCOMPATIBLE_SANITIZERS})
message(FATAL_ERROR "Found incompatible sanitizers in requested set: "
"${REQUESTED_SANITIZERS}. The following sanitizers are mutually "
"exclusive: ${PRETTY_INCOMPATIBLE_SANITIZERS}")
endif()
# Until CMake 3.14 and CMAKE_REQUIRED_LINK_OPTIONS there was no equivalent to
# CMAKE_REQUIRED_FLAGS for try_compile() for linker flags. However, in CMake
# 3.2 CMP0056 was introduced that when enabled passes CMAKE_EXE_LINKER_FLAGS
# to try_compile() which allows us to achieve the same effect.
cmake_policy(SET CMP0056 NEW)
include(CheckCXXCompilerFlag)
unset(ADDED_SANITIZER)
foreach(REQUESTED_SANITIZER ${ARGN})
set(SANITIZER_FLAG -fsanitize=${REQUESTED_SANITIZER})
# Save the current CMAKE_EXE_LINKER_FLAGS before modifying it to test for
# the existence of the sanitizer flag so that we can revert after the test.
set(INITIAL_CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_FLAG}")
check_cxx_compiler_flag(${SANITIZER_FLAG} HAVE_SANITIZER)
set(CMAKE_EXE_LINKER_FLAGS "${INITIAL_CMAKE_EXE_LINKER_FLAGS}")
if (NOT HAVE_SANITIZER)
message(FATAL_ERROR "Specified sanitizer: ${REQUESTED_SANITIZER} is not "
"supported by the compiler.")
endif()
message(STATUS "Enabling sanitizer: ${REQUESTED_SANITIZER}")
set(ADDED_SANITIZER TRUE)
# As per the Clang documentation, the sanitizer flags must be added to both
# the compiler and linker flags.
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SANITIZER_FLAG}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_FLAG}")
endforeach()
if (ADDED_SANITIZER)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COMMON_SANITIZER_COMPILE_OPTIONS}")
endif()
endmacro()