[WIP] Use newer C++, target IMC platform, fix Ubuntu image version

.github/workflows/build-spike.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   verilator:
     name: Build Spike
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       TOOL_NAME: spike
       TOOL_VERSION: d70ea67d

.github/workflows/build-verilator.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   verilator:
     name: Build Verilator
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         include:

.github/workflows/gh-pages-pr-closed.yml

@@ -10,7 +10,7 @@ jobs:
     name: PR Remove
     concurrency:
       group: gh-pages
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       contents: write
     steps:

.github/workflows/gh-pages-pr-comment.yml

@@ -12,7 +12,7 @@ env:
 jobs:
   comment:
     name: PR Comment
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       pull-requests: write
     if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success' }}

.github/workflows/gh-pages-pr-deploy.yml

@@ -11,7 +11,7 @@ jobs:
     name: PR Deploy
     concurrency:
       group: gh-pages
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       contents: write
     if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success' }}

.github/workflows/gh-pages-pr-remove.yml

@@ -14,7 +14,7 @@ jobs:
     name: PR Remove Deploy
     concurrency:
       group: gh-pages
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       contents: write
     steps:

.github/workflows/publish-webpage.yml

@@ -8,7 +8,7 @@ jobs:
     name: Build and Main Deploy
     concurrency:
       group: gh-pages
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       contents: write
     steps:

.github/workflows/report-coverage.yml

@@ -7,7 +7,7 @@ jobs:
 
   coverage-report:
     name: Coverage report
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       DEBIAN_FRONTEND: "noninteractive"
 

.github/workflows/test-regression.yml

@@ -7,7 +7,7 @@ jobs:
 
   regression-tests:
     name: Regression tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         bus: ["axi", "ahb"]

.github/workflows/test-riscof.yml

@@ -7,7 +7,7 @@ jobs:
 
   tests:
     name: Run RISCOF tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:

.github/workflows/test-riscv-dv.yml

@@ -10,7 +10,7 @@ jobs:
 #--------------#
   renode:
     name: Download Renode
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       CCACHE_DIR: "/opt/veer-el2/.cache/"
       DEBIAN_FRONTEND: "noninteractive"
@@ -55,7 +55,7 @@ jobs:
 #--------------#
   veer-iss:
     name: Build VeeR-ISS
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       CCACHE_DIR: "/opt/veer-el2/.cache/"
       DEBIAN_FRONTEND: "noninteractive"
@@ -106,7 +106,7 @@ jobs:
 #--------------#
   generate-config:
     name: Generate configs
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     outputs:
       test-types: ${{ steps.test-types.outputs.tests }}
       test-include-generate: ${{ steps.test-types.outputs.include-generate }}
@@ -192,7 +192,7 @@ jobs:
 
   run-tests:
     name: Run RISC-V DV tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: [ veer-iss, renode, generate-config, generate-code ]
     strategy:
       fail-fast: false

.github/workflows/test-uarch.yml

@@ -9,7 +9,7 @@ env:
 jobs:
   lint:
     name: Lint microarchitectural tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Setup repository
         uses: actions/checkout@v3
@@ -34,7 +34,7 @@ jobs:
           popd
   tests:
     name: Microarchitectural tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         test:

.github/workflows/test-uvm.yml

@@ -6,7 +6,7 @@ on:
 jobs:
   tests:
     name: UVM tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     env:
       CCACHE_DIR: "/opt/uvm/.cache/"
       VERILATOR_VERSION: uvm

.github/workflows/test-verification.yml

@@ -9,7 +9,7 @@ env:
 jobs:
   tests:
     name: Verification tests
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         test: ["test_pyuvm"]

.github/workflows/verible-format.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   format-review:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       checks: write
       contents: read

.github/workflows/verible-lint.yml

@@ -5,7 +5,7 @@ on:
 
 jobs:
   lint-review:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       checks: write
       contents: read

README.md

@@ -37,8 +37,8 @@ installed so that it can be used to prepare RISCV binaries to run.
 ## Quickstart guide
 
 1. Clone the repository, clone submodules with `git submodule update --init --recursive`
-1. Setup `RV_ROOT` to point to the path in your local filesystem
-1. Determine your configuration (optional)
+1. Set `RV_ROOT` to the root path of this repository in your filesystem
+1. Apply optional configuration (see _Configurations_ section)
 1. Run `make` with `tools/Makefile`
 
 ## Release Notes for this version

tools/Makefile

@@ -121,9 +121,8 @@ defines += ${RV_ROOT}/design/include/el2_def.sv
 defines += $(BUILD_DIR)/el2_pdef.vh
 includes = -I${BUILD_DIR}
 
-# CFLAGS for verilator generated Makefiles. Without -std=c++11 it
-# complains for `auto` variables
-CFLAGS += -std=c++11
+# Verilator supports only C++14 and newer
+CFLAGS += -std=c++14
 
 # Optimization for better performance; alternative is nothing for
 # slower runtime (faster compiles) -O2 for faster runtime (slower

tools/picolibc.mk

@@ -43,7 +43,7 @@ $(INSTALL_PATH)/picolibc.specs: $(BUILD_PATH)/cross.txt | $(BUILD_PATH)
 
 	cd $(PICOLIBC_PATH) && meson $(BUILD_PATH) \
 		-Dmultilib=true \
-		-Dmultilib-list=rv32imac/ilp32 \
+		-Dmultilib-list=rv32imc/ilp32 \
 		-Dpicocrt=false \
 		-Datomic-ungetc=false \
 		-Dthread-local-storage=false \