Starting with commit c793430 (Limit file descriptors used by packs, 2011-02-28), git uses getrlimit to tell how many file descriptors it can use. Unfortunately it does not include the header declaring that function, resulting in compilation errors:
sha1_file.c: In function 'open_packed_git_1': sha1_file.c:718: error: storage size of 'lim' isn't known sha1_file.c:721: warning: implicit declaration of function 'getrlimit' sha1_file.c:721: error: 'RLIMIT_NOFILE' undeclared (first use in this function) sha1_file.c:718: warning: unused variable 'lim'
The standard header to include for this is <sys/resource.h> (which on some systems itself requires declarations from <sys/types.h> or <sys/time.h>). Probably the problem was missed until now because in current glibc sys/resource.h happens to be included by sys/wait.h.
MinGW does not provide sys/resource.h (and compat/mingw takes care of providing getrlimit some other way), so add the missing #include to the "#ifndef __MINGW32__" block in git-compat-util.h.
Reported-by: Stefan Sperling <firstname.lastname@example.org> Tested-by: Stefan Sperling <email@example.com> [on OpenBSD] Tested-by: Arnaud Lacombe <firstname.lastname@example.org> [on FreeBSD 8] Signed-off-by: Jonathan Nieder <email@example.com> Signed-off-by: Junio C Hamano <firstname.lastname@example.org>