https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99406
Bug ID: 99406 Summary: [11 regression] MAP_ANONYMOUS undeclared in libgcov.h Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: gcov-profile Assignee: unassigned at gcc dot gnu.org Reporter: ro at gcc dot gnu.org CC: iains at gcc dot gnu.org, marxin at gcc dot gnu.org Target Milestone: --- Target: *-apple-darwin11 The unconditional use of MAP_ANONYMOUS in libgcov.h broke Mac OS X 10.7/Darwin 11 bootstrap: In file included from /vol/gcc/src/hg/master/darwin/libgcc/libgcov-merge.c:26: /vol/gcc/src/hg/master/darwin/libgcc/libgcov.h: In function 'malloc_mmap': In file included from /vol/gcc/src/hg/master/darwin/libgcc/libgcov-merge.c:26: /vol/gcc/src/hg/master/darwin/libgcc/libgcov.h: In function 'malloc_mmap': /vol/gcc/src/hg/master/darwin/libgcc/libgcov.h:420:30: error: 'MAP_ANONYMOUS' undeclared (first use in this function); did you mean 'MAP_ANON'? 420 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | ^~~~~~~~~~~~~ | MAP_ANON /vol/gcc/src/hg/master/darwin/libgcc/libgcov.h:420:30: note: each undeclared identifier is reported only once for each function it appears in I haven't checked which macOS version introduced MAP_ANONYMOUS as alias for MAP_ANON, but macOS 11/Darwin 20 has it.