add handling for other linux distros

src/qc/CMakeLists.txt

@@ -7,7 +7,10 @@ target_link_libraries(qc
 )
 
 if (WIN32)
-	target_link_libraries(qc ws2_32)
+    target_link_libraries(qc ws2_32)
 else()
-	target_link_libraries(qc pthread md)
+    target_link_libraries(qc pthread)
+    if (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+        target_link_libraries(qc md)
+    endif()
 endif()

src/qc/qc.cpp

@@ -29,6 +29,7 @@ extern "C"
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
+#include <cstring>
 
 #include "crc32.h"