When building with the GNU toolchain, /usr/local/lib and
/usr/local/include are among the default search paths for the compiler
and linker. It seems that this is not the case for Clang/LLVM, and thus
some packages fail to build, while others silently drop optional deps.
This commit adds those paths back, fixing multiple packages at once.
Additionally, it removes legacy -I/-L includes in various Ports which
are no longer needed.
Co-Authored-By: Nico Weber <thakis@chromium.org>
We should build file natively as well so it can be used to compile the
target build (for serenity). The Makefile doesn't do this automatically
so to ensure it will not fail due to version mismatch between the host
version and target version, we ensure we always have a native binary at
hand.
This is essentially the de facto way to interface with FUSE, and as
such, pretty much every port that uses FUSE in any way will depend on
this. Of all the examples that we compile, 'hello', 'hello_ll' and
'passthrough' have been verified to work.
Apart from bumping the toolchain Clang's and port's version, this commit
completely overhauls the way LLVM toolchain is built.
First, it gets rid of a complicated two-stage process of first compiling
clang and compiler-rt builtins and then building libunwind, libc++abi,
and libc++ -- it is possible to create a complete cross-compilation
toolchain in a single CMake invocation with a modern LLVM. Moreover, the
old method was inherently unsupported and subtly broken.
Next, it utilizes full potential of the Stubs "framework". Now we are
even able to compile Clang with -Wl,-z,defs which makes one of the
patches obsolete and the whole installation less error-prone. Note that
it comes at a cost of complicating the bootstrap process on a completely
novel architecture but this hopefully won't happen often.
Lastly, it fixes handling of the -no*lib* family of flags in the
Serenity LLVM driver and correctly uses -nostartfiles in conjunction
with stubs to make necessary CMake configure-time checks succeed.
