The new 'raise' function can be used instead of 'throw' to keep the
framework headers void of C++ throw statements, which would otherwise
prevent the compilation of the headers with -fno-exceptions.
In the presence of the C++ runtime, the 'raise' implementation reflects
the supplied error value(s) as C++ exceptions of the appropriate type.
In the (future) optional absence of the C++ runtime, 'raise' remains
unresolved, which then gives us the assurance that the binary contains
no code path leading to 'raise', all error conditions must have been
covered in other ways than 'raise'.
For this reason, 'Genode::raise' is not provided by the base library
but the cxx library (C++ runtime). Once we allow components to opt out
of the cxx library, 'raise' will automatically become unresolved for
those strict components.
Issue #5245
This patch moves the base library from src/base to src/lib/base,
flattens the library-internal directory structure, and moves the common
parts of the library-description files to base/lib/mk/base.inc and
base/lib/mk/base-common.inc.
Furthermore, the patch fixes a few cosmetic issues (whitespace and
comments only) that I encountered while browsing the result.
Fixes#1952
The wrapper functions (e.g., 'Unwind_*' and friends) now have the same signature
as the original function in 'libgcc', reside in a separate C file which is
archived to cxx.lib.a. In supc++.o we prefix the wrapped functions with '_cxx_'.
This also enables support for riscv.
related to #1880
This patch changes the top-level directory layout as a preparatory
step for improving the tools for managing 3rd-party source codes.
The rationale is described in the issue referenced below.
Issue #1082
