device: 0.878
other: 0.869
graphic: 0.834
semantic: 0.829
permissions: 0.800
debug: 0.798
performance: 0.794
KVM: 0.776
PID: 0.773
files: 0.741
socket: 0.740
vnc: 0.723
boot: 0.710
network: 0.705

Errors while compiling source

OS type: Mac OS X 10.11.6
List of errors:
qemu-io-cmds.c:837:5: warning: implicit declaration of function 'clock_gettime' is invalid in C99 [-Wimplicit-function-declaration]
    clock_gettime(CLOCK_MONOTONIC, &t1);
    ^
qemu-io-cmds.c:837:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t1);
                  ^
qemu-io-cmds.c:843:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:970:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t1);
                  ^
qemu-io-cmds.c:972:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:1184:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t1);
                  ^
qemu-io-cmds.c:1194:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:1306:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t1);
                  ^
qemu-io-cmds.c:1308:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:1351:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:1383:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
qemu-io-cmds.c:1518:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
                  ^
qemu-io-cmds.c:1663:23: error: use of undeclared identifier 'CLOCK_MONOTONIC'
        clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
                      ^
qemu-io-cmds.c:1885:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t1);
                  ^
qemu-io-cmds.c:1887:19: error: use of undeclared identifier 'CLOCK_MONOTONIC'
    clock_gettime(CLOCK_MONOTONIC, &t2);
                  ^
1 warning and 14 errors generated.
make: *** [qemu-io-cmds.o] Error 1

Hi. The CLOCK_MONOTONIC facility was added in OSX 10.12; the version of OSX you're using is too old to build QEMU on, I'm afraid. QEMU's policy is to support the last two releases of OSX, so at the moment that's 10.14 and 10.15. Compiling on older versions might work, but it also might not, as you've discovered.