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def FindSharedPtr(conf):
"""
Detect shared_ptr availability
"""
found = False
namespace = None
header = None
if conf.CheckCXXHeader("memory"):
# 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.
if conf.CheckType('std::shared_ptr<int>', language = 'C++', includes="#include <memory>"):
print("-- Found shared_ptr in std namespace using <memory> header.")
namespace = 'std'
header = 'memory'
elif conf.CheckType('std::tr1::shared_ptr<int>', language = 'C++', includes="#include <memory>"):
print("-- Found shared_ptr in std::tr1 namespace using <memory> header..")
namespace = 'std::tr1'
header = 'memory'
if not namespace and conf.CheckCXXHeader("tr1/memory"):
# 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.
if conf.CheckType('std::tr1::shared_ptr<int>', language = 'C++', includes="#include <tr1/memory>"):
print("-- Found shared_ptr in std::tr1 namespace using <tr1/memory> header..")
namespace = 'std::tr1'
header = 'tr1/memory'
if not namespace:
print("-- Unable to find shared_ptrred_map>.")
conf.env['WITH_SHARED_PTR_SUPPORT'] = namespace and header
conf.env['SHARED_PTR_NAMESPACE'] = namespace
conf.env['SHARED_PTR_HEADER'] = header
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