Bazel build doesn't set correct compile flags.

[plmuon]

We're using the bazel build (bazel/glog.bzl).
It contains 2 genrules that generate some of the header files.
In addition, it has a build rule (native.cc_library) that compiles the source (using the generated header files) with -D flags. These flags are fixed in the rule and not derived from the system (like with the cmake build or autogen/configure/make.

Amongst others, -DHAVE_UNISTD_H is not defined. This results in symlinks not being created.

For our local build, I have now overridden the bazel build file and added a few flags that are appropriate to our environment manually, which is only a workaround for our local context:
"-DHAVE_UNISTD_H",
"-DHAVE_PWD_H",
"-DHAVE_SYSLOG_H",
"-DHAVE_PWRITE",
"-DHAVE_FCNTL",

I assume google's internal version uses blaze (?) and might have solved this?