| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | feature_test_macros | 7 | 1,228 |
| php | feature_test_macros | 7 | 831 |
| centos | feature_test_macros | 7 | 802 |
| debian | feature_test_macros | 7 | 762 |
| posix | feature_test_macros | 7 | 726 |
| v7 | feature_test_macros | 7 | 689 |
| suse | feature_test_macros | 7 | 670 |
| x11r4 | feature_test_macros | 7 | 641 |
| xfree86 | feature_test_macros | 7 | 639 |
| opendarwin | feature_test_macros | 7 | 613 |
| osx | feature_test_macros | 7 | 602 |
| minix | feature_test_macros | 7 | 566 |
| plan9 | feature_test_macros | 7 | 560 |
| bsd | feature_test_macros | 7 | 517 |
| hpux | feature_test_macros | 7 | 512 |
| mojave | feature_test_macros | 7 | 505 |
| freebsd | feature_test_macros | 7 | 486 |
| redhat | feature_test_macros | 7 | 473 |
| sunos | feature_test_macros | 7 | 457 |
| osf1 | feature_test_macros | 7 | 450 |
| opensolaris | feature_test_macros | 7 | 445 |
| ultrix | feature_test_macros | 7 | 445 |
| netbsd | feature_test_macros | 7 | 386 |