add support for linux_riscv64 and freestanding_riscv64

misc/featuregen/README.md

@@ -5,7 +5,7 @@ for features regarding microarchitecture and target features of the compiler.
 
 It is not pretty! But LLVM has no way to query this information with their C API.
 
-It generates these globals (intended for `src/build_settings.cpp`:
+It generates these globals (intended for `src/build_settings_microarch.cpp`:
 
 - `target_microarch_list`: an array of strings indexed by the architecture, each string is a comma-seperated list of microarchitectures available on that architecture
 - `target_features_list`: an array of strings indexed by the architecture, each string is a comma-seperated list of target features available on that architecture
@@ -23,6 +23,6 @@ does not impact much at all, the only thing it will do is make LLVM print a mess
 ## Usage
 
 1. Make sure the table of architectures at the top of the python script is up-to-date (the triple can be any valid triple for the architecture)
-1. `./build.sh`
+1. `./build_featuregen.sh`
 1. `python3 featuregen.py`
 1. Copy the output into `src/build_settings.cpp`

misc/featuregen/build_featuregen.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+set -ex
+
+$(llvm-config --bindir)/clang++ $(llvm-config --cxxflags --ldflags --libs) featuregen.cpp -o featuregen

misc/featuregen/featuregen.py

@@ -4,12 +4,13 @@ import os
 import sys
 
 archs = [
-	("amd64",     "linux_amd64", "x86_64-pc-linux-gnu", [], []),
-	("i386",      "linux_i386",  "i386-pc-linux-gnu",   [], []),
-	("arm32",     "linux_arm32", "arm-linux-gnu",       [], []),
-	("arm64",     "linux_arm64", "aarch64-linux-elf",   [], []),
-	("wasm32",    "js_wasm32",   "wasm32-js-js",        [], []),
-	("wasm64p32", "js_wasm64p32","wasm32-js-js",        [], []),
+	("amd64",     "linux_amd64",   "x86_64-pc-linux-gnu", [], []),
+	("i386",      "linux_i386",    "i386-pc-linux-gnu",   [], []),
+	("arm32",     "linux_arm32",   "arm-linux-gnu",       [], []),
+	("arm64",     "linux_arm64",   "aarch64-linux-elf",   [], []),
+	("wasm32",    "js_wasm32",     "wasm32-js-js",        [], []),
+	("wasm64p32", "js_wasm64p32",  "wasm32-js-js",        [], []),
+	("riscv64",   "linux_riscv64", "riscv64-linux-gnu",   [], []),
 ];
 
 SEEKING_CPUS     = 0
@@ -78,7 +79,8 @@ print("\t// TargetArch_Invalid:")
 print('\tstr_lit(""),')
 for arch, target, triple, cpus, features in archs:
 	print(f"\t// TargetArch_{arch}:")
-	print(f'\tstr_lit("{','.join(cpus)}"),')
+	cpus_str = ','.join(cpus)
+	print(f'\tstr_lit("{cpus_str}"),')
 print("};")
 
 print("")
@@ -89,7 +91,8 @@ print("\t// TargetArch_Invalid:")
 print('\tstr_lit(""),')
 for arch, target, triple, cpus, features in archs:
 	print(f"\t// TargetArch_{arch}:")
-	print(f'\tstr_lit("{','.join(features)}"),')
+	features_str = ','.join(features)
+	print(f'\tstr_lit("{features_str}"),')
 print("};")
 
 print("")