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include(CheckCXXSourceCompiles)
function(find_hash_map)
set(HAVE_HASH_MAP 1 PARENT_SCOPE)
set(HAVE_HASH_SET 1 PARENT_SCOPE)
# Search for hash_map in the following order:
# 1. <unordered_map> ::std::unordered_map
# 2. <tr1/unordered_map> ::std::tr1::unordered_map
# 3. <hash_map> ::hash_map
# 4. <hash_map> ::stdext::hash_map
# 5. <ext/hash_map> ::std::hash_map
# 6. <ext/hash_map> ::__gnu_cxx::hash_map
check_cxx_source_compiles("
#include <unordered_map>
int main() { ::std::unordered_map<int, int> v; return v[0]; }
" HAS_STD_UNORDERED_MAP)
if (HAS_STD_UNORDERED_MAP)
set(HASH_NAMESPACE ::std PARENT_SCOPE)
set(HASH_MAP_H <unordered_map> PARENT_SCOPE)
set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
set(HASH_SET_H <unordered_set> PARENT_SCOPE)
set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
return()
endif (HAS_STD_UNORDERED_MAP)
check_cxx_source_compiles("
#include <tr1/unordered_map>
int main() { ::std::tr1::unordered_map<int, int> v; return v[0]; }
" HAS_STD_TR1_UNORDERED_MAP)
if (HAS_STD_TR1_UNORDERED_MAP)
set(HASH_NAMESPACE ::std::tr1 PARENT_SCOPE)
set(HASH_MAP_H <tr1/unordered_map> PARENT_SCOPE)
set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
set(HASH_SET_H <tr1/unordered_set> PARENT_SCOPE)
set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
return()
endif (HAS_STD_TR1_UNORDERED_MAP)
check_cxx_source_compiles("
#include <hash_map>
int main() { ::hash_map<int, int> v; return v[0]; }
" HAS_HASH_MAP)
if (HAS_HASH_MAP)
set(HASH_NAMESPACE :: PARENT_SCOPE)
set(HASH_MAP_H <hash_map> PARENT_SCOPE)
set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
set(HASH_SET_H <hash_set> PARENT_SCOPE)
set(HASH_SET_CLASS hash_set PARENT_SCOPE)
return()
endif (HAS_HASH_MAP)
check_cxx_source_compiles("
#include <hash_map>
int main() { ::stdext::hash_map<int, int> v; return v[0]; }
" HAS_STDEXT_HASH_MAP)
if (HAS_STDEXT_HASH_MAP)
set(HASH_NAMESPACE ::stdext PARENT_SCOPE)
set(HASH_MAP_H <hash_map> PARENT_SCOPE)
set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
set(HASH_SET_H <hash_set> PARENT_SCOPE)
set(HASH_SET_CLASS hash_set PARENT_SCOPE)
return()
endif (HAS_STDEXT_HASH_MAP)
check_cxx_source_compiles("
#include <ext/hash_map>
int main() { ::std::hash_map<int, int> v; return v[0]; }
" HAS_STD_HASH_MAP)
if (HAS_STD_HASH_MAP)
set(HASH_NAMESPACE ::std PARENT_SCOPE)
set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
set(HASH_SET_CLASS hash_set PARENT_SCOPE)
return()
endif (HAS_STD_HASH_MAP)
check_cxx_source_compiles("
#include <ext/hash_map>
int main() { ::__gnu_cxx::hash_map<int, int> v; return v[0]; }
" HAS_GNU_CXX_HASH_MAP)
if (HAS_GNU_CXX_HASH_MAP)
set(HASH_NAMESPACE ::gnu_cxx PARENT_SCOPE)
set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
set(HASH_SET_CLASS hash_set PARENT_SCOPE)
return()
endif (HAS_GNU_CXX_HASH_MAP)
set(HAVE_HASH_MAP 0 PARENT_SCOPE)
set(HAVE_HASH_SET 0 PARENT_SCOPE)
endfunction()
function(find_hash_compare)
if (MSVC)
check_cxx_source_compiles("
#include ${HASH_MAP_H}
int main() { ::std::hash_compare<int> cp; return cp(0); }
" HAS_STD_HASH_COMPARE)
if (HAS_STD_HASH_COMPARE)
set(HASH_COMPARE ::std::hash_compare PARENT_SCOPE)
return()
endif (HAS_STD_HASH_COMPARE)
check_cxx_source_compiles("
#include ${HASH_MAP_H}
int main() { ::stdext::hash_compare<int> cp; return cp(0); }
" HAS_STDEXT_HASH_COMPARE)
if (HAS_STDEXT_HASH_COMPARE)
set(HASH_COMPARE ::stdext::hash_compare PARENT_SCOPE)
return()
endif (HAS_STDEXT_HASH_COMPARE)
endif (MSVC)
set(HASH_COMPARE PARENT_SCOPE)
endfunction()
find_hash_map()
find_hash_compare()
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