I managed to use a workaround for now, something like this:

alias bzb="bazel build //my_target"
bzb -s --spawn_strategy=standalone
We need to compile precompiled headers with the same options as source files. From output of previous command, find a line compiling any of .cpp files from //my_target (should start with /usr/bin/gcc)
- Remove options: -Wl,..., -o /output/path
- Replace -c /input/path by path of your precompiled header
- Add -x c++-header
After executing this command, .h.gch file should be generated in the same directory as input .h.

Check if compile use our new .h.gch instead of original .h:

Add to your cc_binary/cc_library rule: copts = ["-H"]

bazel clean
bzb --spawn_strategy=standalone

In the output, in case of success there must be ! before our header and x in case of failure. From man gcc:

-H  Print the name of each header file used, in addition to other normal
   activities.  Each name is indented to show how deep in the #include stack
   it is.  Precompiled header files are also printed, even if they are found
   to be invalid; an invalid precompiled header file is printed with ...x
   and a valid one with ...! .

Add support for C++ precompiled headers #1215

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