Fix build on FreeBSD. (#7206)

Author: aisakovic

src/tools/io-benchmark.cpp

@@ -1,3 +1,7 @@
+#ifdef __FreeBSD__
+#pragma clang diagnostic ignored "-Wunreachable-code"
+#endif
+
 #include "util/exception.hpp"
 #include "util/exception_utils.hpp"
 #include "util/log.hpp"
@@ -9,6 +13,9 @@
 #ifdef __linux__
 #include <malloc.h>
 #endif
+#ifdef __FreeBSD__
+#include <unistd.h>
+#endif
 
 #include <algorithm>
 #include <filesystem>
@@ -89,6 +96,14 @@ int main(int argc, char *argv[])
         TIMER_STOP(write_1gb);
         fclose(fd);
 #endif
+#ifdef __FreeBSD__
+        int fd = open(test_path.string().c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_DIRECT, 0644);
+        fcntl(fd, F_RDAHEAD, 0);
+        TIMER_START(write_1gb);
+        write(fd, (char *)random_array, osrm::tools::NUMBER_OF_ELEMENTS * sizeof(unsigned));
+        TIMER_STOP(write_1gb);
+        close(fd);
+#endif
 #ifdef __linux__
         int file_desc =
             open(test_path.string().c_str(), O_CREAT | O_TRUNC | O_WRONLY | O_SYNC, S_IRWXU);