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function(check_functions FUNCTIONS REQUIRED)
foreach(FUNC ${FUNCTIONS})
string(TOUPPER "SAUNAFS_HAVE_${FUNC}" VAR)
CHECK_FUNCTION_EXISTS(${FUNC} ${VAR})
if(${REQUIRED})
if("${${VAR}}" STREQUAL "" OR NOT ${${VAR}} EQUAL 1)
message(SEND_ERROR "function ${FUNC} is required")
endif()
endif()
endforeach()
endfunction()
function(check_template_function_exists HEADER CALL OUTPUT_VARIABLE)
if (NOT DEFINED ${OUTPUT_VARIABLE})
check_cxx_source_compiles("
#include <${HEADER}>
int main(int, char**) {
${CALL};
return 0;
}" ${OUTPUT_VARIABLE})
endif()
endfunction()
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