109 lines
5.2 KiB
CMake
109 lines
5.2 KiB
CMake
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# Ceres Solver - A fast non-linear least squares minimizer
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# Copyright 2015 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: sergey.vfx@gmail.com (Sergey Sharybin)
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#
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# FindSharedPtr.cmake - Find shared pointer header and namespace.
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#
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# This module defines the following variables:
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#
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# SHARED_PTR_FOUND: TRUE if shared_ptr found.
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# SHARED_PTR_TR1_MEMORY_HEADER: True if <tr1/memory> header is to be used
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# for the shared_ptr object, otherwise use <memory>.
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# SHARED_PTR_TR1_NAMESPACE: TRUE if shared_ptr is defined in std::tr1 namespace,
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# otherwise it's assumed to be defined in std namespace.
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macro(FIND_SHARED_PTR)
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# To support CXX11 option, clear the results of all check_xxx() functions
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# s/t we always perform the checks each time, otherwise CMake fails to
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# detect that the tests should be performed again after CXX11 is toggled.
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unset(HAVE_STD_MEMORY_HEADER CACHE)
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unset(HAVE_SHARED_PTR_IN_STD_NAMESPACE CACHE)
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unset(HAVE_SHARED_PTR_IN_TR1_NAMESPACE CACHE)
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unset(HAVE_TR1_MEMORY_HEADER CACHE)
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unset(HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER CACHE)
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set(SHARED_PTR_FOUND FALSE)
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check_include_file_cxx(memory HAVE_STD_MEMORY_HEADER)
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if (HAVE_STD_MEMORY_HEADER)
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# Finding the memory header doesn't mean that shared_ptr is in std
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# namespace.
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#
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# In particular, MSVC 2008 has shared_ptr declared in std::tr1. In
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# order to support this, we do an extra check to see which namespace
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# should be used.
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include(CheckCXXSourceCompiles)
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check_cxx_source_compiles("#include <memory>
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int main() {
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std::shared_ptr<int> int_ptr;
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return 0;
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}"
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HAVE_SHARED_PTR_IN_STD_NAMESPACE)
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if (HAVE_SHARED_PTR_IN_STD_NAMESPACE)
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message("-- Found shared_ptr in std namespace using <memory> header.")
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set(SHARED_PTR_FOUND TRUE)
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else (HAVE_SHARED_PTR_IN_STD_NAMESPACE)
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check_cxx_source_compiles("#include <memory>
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int main() {
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std::tr1::shared_ptr<int> int_ptr;
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return 0;
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}"
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HAVE_SHARED_PTR_IN_TR1_NAMESPACE)
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if (HAVE_SHARED_PTR_IN_TR1_NAMESPACE)
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message("-- Found shared_ptr in std::tr1 namespace using <memory> header.")
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set(SHARED_PTR_TR1_NAMESPACE TRUE)
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set(SHARED_PTR_FOUND TRUE)
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endif (HAVE_SHARED_PTR_IN_TR1_NAMESPACE)
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endif (HAVE_SHARED_PTR_IN_STD_NAMESPACE)
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endif (HAVE_STD_MEMORY_HEADER)
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if (NOT SHARED_PTR_FOUND)
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# Further, gcc defines shared_ptr in std::tr1 namespace and
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# <tr1/memory> is to be included for this. And what makes things
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# even more tricky is that gcc does have <memory> header, so
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# all the checks above wouldn't find shared_ptr.
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check_include_file_cxx("tr1/memory" HAVE_TR1_MEMORY_HEADER)
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if (HAVE_TR1_MEMORY_HEADER)
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check_cxx_source_compiles("#include <tr1/memory>
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int main() {
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std::tr1::shared_ptr<int> int_ptr;
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return 0;
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}"
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HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER)
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if (HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER)
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message("-- Found shared_ptr in std::tr1 namespace using <tr1/memory> header.")
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set(SHARED_PTR_TR1_MEMORY_HEADER TRUE)
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set(SHARED_PTR_TR1_NAMESPACE TRUE)
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set(SHARED_PTR_FOUND TRUE)
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endif (HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER)
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endif (HAVE_TR1_MEMORY_HEADER)
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endif (NOT SHARED_PTR_FOUND)
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endmacro(FIND_SHARED_PTR)
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