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# - Check if for hash_set.
# CHECK_HASHSET ()
#
include(CheckCXXSourceCompiles)
macro(CHECK_HASHSET)
message(STATUS "Checking for C++ hash_set implementation...")
check_cxx_source_compiles("
#include <ext/hash_set>
int main() {
__gnu_cxx::hash_set<int> t;
}
"
HAVE_GNU_EXT_HASH_SET
)
if(HAVE_GNU_EXT_HASH_SET)
message(STATUS "C++ hash_set found in 'ext' dir in namespace __gnu_cxx::")
endif(HAVE_GNU_EXT_HASH_SET)
check_cxx_source_compiles("
#include <ext/hash_set>
int main() {
std::hash_set<int> t;
}
"
HAVE_STD_EXT_HASH_SET
)
if(HAVE_STD_EXT_HASH_SET)
message(STATUS "C++ hash_set found in 'ext' dir in namespace std::")
endif(HAVE_STD_EXT_HASH_SET)
check_cxx_source_compiles("
#include <hash_set>
int main() {
hash_set<int> t;
}
"
HAVE_GLOBAL_HASH_SET
)
if(HAVE_GLOBAL_HASH_SET)
message(STATUS "C++ hash_set found in global namespace")
endif(HAVE_GLOBAL_HASH_SET)
if(NOT HAVE_GNU_EXT_HASH_SET)
if(NOT HAVE_STD_EXT_HASH_SET)
if(NOT HAVE_GLOBAL_HASH_SET)
message(STATUS "C++ hash_set not found")
endif(NOT HAVE_GLOBAL_HASH_SET)
endif(NOT HAVE_STD_EXT_HASH_SET)
endif(NOT HAVE_GNU_EXT_HASH_SET)
endmacro(CHECK_HASHSET)
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