| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | feature_test_macros | 7 | 706 |
| centos | feature_test_macros | 7 | 430 |
| posix | feature_test_macros | 7 | 420 |
| php | feature_test_macros | 7 | 388 |
| debian | feature_test_macros | 7 | 372 |
| xfree86 | feature_test_macros | 7 | 370 |
| opendarwin | feature_test_macros | 7 | 346 |
| suse | feature_test_macros | 7 | 345 |
| x11r4 | feature_test_macros | 7 | 345 |
| v7 | feature_test_macros | 7 | 335 |
| plan9 | feature_test_macros | 7 | 299 |
| minix | feature_test_macros | 7 | 295 |
| osx | feature_test_macros | 7 | 294 |
| freebsd | feature_test_macros | 7 | 279 |
| bsd | feature_test_macros | 7 | 263 |
| redhat | feature_test_macros | 7 | 261 |
| hpux | feature_test_macros | 7 | 250 |
| mojave | feature_test_macros | 7 | 246 |
| ultrix | feature_test_macros | 7 | 239 |
| sunos | feature_test_macros | 7 | 225 |
| opensolaris | feature_test_macros | 7 | 218 |
| osf1 | feature_test_macros | 7 | 210 |
| netbsd | feature_test_macros | 7 | 180 |