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77 lines
3.4 KiB
CMake
77 lines
3.4 KiB
CMake
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# Ceres Solver - A fast non-linear least squares minimizer
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# Copyright 2019 Google Inc. All rights reserved.
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# http://ceres-solver.org/
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# * Neither the name of Google Inc. nor the names of its contributors may be
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# used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# Author: alexs.mac@gmail.com (Alex Stewart)
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# As detailed in [1] the combination of macOS 10.15.x (Catalina) and Xcode 11
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# (up to at least 10.15.1 / Xcode 11.1) enables by default -fstack-check which
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# can break the alignment requirements for SIMD instructions resulting in
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# segfaults from within Eigen.
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#
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# [1]: https://forums.developer.apple.com/thread/121887
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function(detect_simd_hostile_stack_check_macos_xcode_pairing OUT_VAR)
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set(${OUT_VAR} FALSE PARENT_SCOPE)
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if (NOT APPLE)
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return()
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endif()
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execute_process(COMMAND sw_vers -productVersion
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OUTPUT_VARIABLE MACOS_VERSION
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ERROR_QUIET
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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execute_process(COMMAND xcodebuild -version
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OUTPUT_VARIABLE XCODE_VERSION
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ERROR_QUIET
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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string(REGEX MATCH "Xcode [0-9\\.]+" XCODE_VERSION "${XCODE_VERSION}")
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string(REGEX REPLACE "Xcode ([0-9\\.]+)" "\\1" XCODE_VERSION "${XCODE_VERSION}")
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include(CheckCXXSourceRuns)
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set(CMAKE_REQUIRED_FLAGS "-mavx -O3")
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# Minimal test case taken from [1], author: snowcat, segfaults if
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# -fstack-check is enabled by default on affected macOS / Xcode pairing.
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check_cxx_source_runs(
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"int main(void) {
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register char a __asm(\"rbx\") = 0;
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char b[5000];
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char c[100] = {0};
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asm volatile(\"\" : : \"r,m\"(a), \"r,m\"(b), \"r,m\"(c) : \"memory\");
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return 0;
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}"
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BROKEN_STACK_CHECK_DISABLED_BY_DEFAULT)
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if (NOT BROKEN_STACK_CHECK_DISABLED_BY_DEFAULT)
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message("-- Detected macOS version: ${MACOS_VERSION} and Xcode version: "
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"${XCODE_VERSION} with SIMD-hostile -fstack-check enabled by default. "
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"Unless -fno-stack-check is used, segfaults may occur in any code that "
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"uses SIMD instructions.")
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set(${OUT_VAR} TRUE PARENT_SCOPE)
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endif()
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endfunction()
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