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Diffstat (limited to 'cmake/FindSharedPtr.cmake')
| -rw-r--r-- | cmake/FindSharedPtr.cmake | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/cmake/FindSharedPtr.cmake b/cmake/FindSharedPtr.cmake new file mode 100644 index 0000000..3d2ba6c --- /dev/null +++ b/cmake/FindSharedPtr.cmake @@ -0,0 +1,99 @@ +# Ceres Solver - A fast non-linear least squares minimizer +# Copyright 2014 Google Inc. All rights reserved. +# http://code.google.com/p/ceres-solver/ +# +# 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: sergey.vfx@gmail.com (Sergey Sharybin) +# + +# FindSharedPtr.cmake - Find shared pointer header and namespace. +# +# This module defines the following variables: +# +# SHARED_PTR_FOUND: TRUE if shared_ptr found. +# SHARED_PTR_TR1_MEMORY_HEADER: True if <tr1/memory> header is to be used +# for the shared_ptr object, otherwise use <memory>. +# SHARED_PTR_TR1_NAMESPACE: TRUE if shared_ptr is defined in std::tr1 namespace, +# otherwise it's assumed to be defined in std namespace. + +MACRO(FIND_SHARED_PTR) + SET(SHARED_PTR_FOUND FALSE) + CHECK_INCLUDE_FILE_CXX(memory HAVE_STD_MEMORY_HEADER) + IF (HAVE_STD_MEMORY_HEADER) + # Finding the memory header doesn't mean that shared_ptr is in std + # namespace. + # + # In particular, MSVC 2008 has shared_ptr declared in std::tr1. In + # order to support this, we do an extra check to see which namespace + # should be used. + INCLUDE(CheckCXXSourceCompiles) + CHECK_CXX_SOURCE_COMPILES("#include <memory> + int main() { + std::shared_ptr<int> int_ptr; + return 0; + }" + HAVE_SHARED_PTR_IN_STD_NAMESPACE) + + IF (HAVE_SHARED_PTR_IN_STD_NAMESPACE) + MESSAGE("-- Found shared_ptr in std namespace using <memory> header.") + SET(SHARED_PTR_FOUND TRUE) + ELSE (HAVE_SHARED_PTR_IN_STD_NAMESPACE) + CHECK_CXX_SOURCE_COMPILES("#include <memory> + int main() { + std::tr1::shared_ptr<int> int_ptr; + return 0; + }" + HAVE_SHARED_PTR_IN_TR1_NAMESPACE) + IF (HAVE_SHARED_PTR_IN_TR1_NAMESPACE) + MESSAGE("-- Found shared_ptr in std::tr1 namespace using <memory> header.") + SET(SHARED_PTR_TR1_NAMESPACE TRUE) + SET(SHARED_PTR_FOUND TRUE) + ENDIF (HAVE_SHARED_PTR_IN_TR1_NAMESPACE) + ENDIF (HAVE_SHARED_PTR_IN_STD_NAMESPACE) + ENDIF (HAVE_STD_MEMORY_HEADER) + + IF (NOT SHARED_PTR_FOUND) + # Further, gcc defines shared_ptr in std::tr1 namespace and + # <tr1/memory> is to be included for this. And what makes things + # even more tricky is that gcc does have <memory> header, so + # all the checks above wouldn't find shared_ptr. + CHECK_INCLUDE_FILE_CXX("tr1/memory" HAVE_TR1_MEMORY_HEADER) + IF (HAVE_TR1_MEMORY_HEADER) + CHECK_CXX_SOURCE_COMPILES("#include <tr1/memory> + int main() { + std::tr1::shared_ptr<int> int_ptr; + return 0; + }" + HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER) + IF (HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER) + MESSAGE("-- Found shared_ptr in std::tr1 namespace using <tr1/memory> header.") + SET(SHARED_PTR_TR1_MEMORY_HEADER TRUE) + SET(SHARED_PTR_TR1_NAMESPACE TRUE) + SET(SHARED_PTR_FOUND TRUE) + ENDIF (HAVE_SHARED_PTR_IN_TR1_NAMESPACE_FROM_TR1_MEMORY_HEADER) + ENDIF (HAVE_TR1_MEMORY_HEADER) + ENDIF (NOT SHARED_PTR_FOUND) +ENDMACRO(FIND_SHARED_PTR) |