add scripts for building llvm (for inclusion in addon root)

.gitignore

@@ -4,3 +4,11 @@ native/projects/riscv/ref
 
 .cache/
 .vscode/
+
+
+# temporary
+llvm_src/
+llvm_build/
+
+# pre-'mv' filenames
+llvm-project-*/

build_llvm.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# this script builds llvm components
+
+LLVM_VERSION=16.0.0
+LLVM_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-$LLVM_VERSION/llvm-project-$LLVM_VERSION.src.tar.xz"
+LLVM_FILENAME="llvm-project-$LLVM_VERSION.src.tar.xz"
+
+
+# download/extract LLVM (if need be)
+[[ ! -d 'llvm_src' ]] && {
+	curl -LO $LLVM_URL
+	tar xf $LLVM_FILENAME
+	mv llvm-project-$LLVM_VERSION.src llvm_src/
+	rm $LLVM_FILENAME
+};
+
+# Configure LLVM. THis is a mouthful, but it's only a mouthful because we specialize things we don't
+# want in our minimal build of the LLVM project/clang.
+# -DLLVM_ENABLE_LTO=Thin 
+cmake -GNinja -S llvm_src/llvm -B llvm_build \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DCMAKE_C_COMPILER=clang \
+	-DCMAKE_CXX_COMPILER=clang++ \
+	-DCMAKE_INSTALL_PREFIX="$PWD/lua/bin/llvm" \
+	-DLLVM_USE_LINKER=lld \
+	-DLLVM_INCLUDE_TESTS=OFF \
+	-DLLVM_ENABLE_PROJECTS="clang;lld" \
+	-DLLVM_TARGETS_TO_BUILD="RISCV" \
+	-DLLVM_DEFAULT_TARGET_TRIPLE="riscv32-none-gnu"
+
+# TODO: Configure and build compiler-rt with our toolchain.
+#cmake -GNinja -S llvm_src/compiler-rt \
+#	-DCOMPILER_RT_BUILD_SANITIZERS=OFF \
+#	-DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
+#	-DCOMPILER_RT_BUILD_PROFILE=OFF \
+#	-DCOMPILER_RT_BUILD_MEMPROF=OFF \
+#	-DCOMPILER_RT_BUILD_ORC=OFF \
+#	-DCOMPILER_RT_BAREMETAL_BUILD=ON
+
+# Build it
+cmake --build llvm_build -j $(($(nproc) + 1))

ideas.md

@@ -8,6 +8,7 @@ This is basically the working ideas for the LCPU project.
 	- RISC-V rv32ima core
 		- Would supporting more than one CPU core type be worthwhile? If so, the project is relatively setup for such workflow...
 	- Controllable paramaters (RAM size, ...)
+- Our own frambuffer screen SENT (since wiremod decided to go stupid mode and saw off the gpu)
 
 ## Code upload/project workflow
 
@@ -17,12 +18,16 @@ This is basically the working ideas for the LCPU project.
 
 ### Integrated simple project workflow
 
-- Write assembly/maybe C code using a tiny project system (data for them would go in server data folder ?)
+### LLVM integration
-	- LLVM assembler is used
+- LLVM assembler (llvm-mc) is used
-		- Integrated clang for C code? (if it's not prohibitively expensive)
+	- clang for C code? (if it's not prohibitively expensive)
 	- In all cases (as/clang), the tools will all be firewalled to the given project data directory.
 		In the case of clang, an addional path will be allowed (clang freestanding headers), but that's the only exception. 
 
+	- LLVM tools integrated into server library? Or installed in lua/bin?
+
+- Write assembly/maybe C code using a tiny project system (data for them would go in server data folder ?)
+
 - Text editor used to edit project source files
 
 - Some example projects?
@@ -33,9 +38,9 @@ This is basically the working ideas for the LCPU project.
 	- possibly override for "respectful" users and admins (admins probably wouldn't even count)?
 
 - Admin controlled per-user max LCPU entity count (default 8)
-	- admins can override/do not count?
+	- Admins don't count
 
-- Admin controled global (affects all placed LCPUs) scheduler timeslice.
+- Admin controled global (affects all placed LCPUs) scheduler cycle rate.
 	- Couldn't be faster than tickrate though or we might block source (and.. well, i dont think i have to explain)
 		- I decided not to go with the cpu thread stuff just because its annoying, and would require more state tracking. just ticking in lua using `ENTITY:Think` should be more than good enough (even if theres a risk of hitching source, but I don't think it's that big of a problem...)
 		- Project compilations however will definitely end up in a different thread though. Running them in the engine thread would undoubtably cause issues.
@@ -45,4 +50,3 @@ This is basically the working ideas for the LCPU project.
 - Wiremod interopability
 	- Wiremod GPIO (which uses normal wire stuff)
 	- Console Screen
-	- Wire GPU (if it's not painful to do so)?

lua/autorun/lcpu_load.lua

@@ -2,3 +2,9 @@
 -- this will contain files later on in life.
 
 print("hello world?")
+
+-- detect if wiremod is installed
+if not istable(WireLib) then
+	print("[LCPU] we need wiremod..")
+	return
+end