Some questions about package.mk structure

Quote from mglae

This is not working as expected, see packages/readme.mk:

Code

Further to this, toolchain variables that are defined in `setup_toolchain()` must not be referenced "globally" in the package as they will only be configured reliably after `setup_toolchain()` has been called during `scripts/build`. Any variable in the following list must instead be referenced in a package function such as `pre_build_*`, `pre_configure_*`, `pre_make_*` etc.:
```
  TARGET_CFLAGS TARGET_CXXFLAGS TARGET_LDFLAGS
  NINJA_OPTS MAKEFLAGS
  DESTIMAGE
  CC CXX CPP LD
  AS AR NM RANLIB
  OBJCOPY OBJDUMP
  STRIP
  CPPFLAGS CFLAGS CXXFLAGS LDFLAGS
  PKG_CONFIG
  PKG_CONFIG_PATH
  PKG_CONFIG_LIBDIR
  PKG_CONFIG_SYSROOT_DIR
  PKG_CONFIG_ALLOW_SYSTEM_CFLAGS
  PKG_CONFIG_ALLOW_SYSTEM_LIBS
  CMAKE_CONF CMAKE
  HOST_CC HOST_CXX HOSTCC HOSTCXX
  CC_FOR_BUILD CXX_FOR_BUILD BUILD_CC BUILD_CXX
  _python_sysroot _python_prefix _python_exec_prefix

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I suposed that and I didn't understand why it was put there, but as it was in the original pacakge.mk of espeak, I didn't deleted it. The package is built propperly without that variables.