Migrate build system to CMake

See #5895 for details.

This commit does not include CI or documentation changes.

misc/cmake/check_missing_depends.sh

@@ -0,0 +1,9 @@
+# Builds each Yosys component individually to make sure there aren't any missing static dependencies.
+# Checking for dynamic dependencies would involve running the testsuite, which is much slower.
+
+set -e
+cmake .. -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_LINKER_TYPE=LLD
+for comp in $(ninja --quiet print-yosys-components); do
+	cmake . -DCOMPONENTS=$comp
+	ninja --quiet yosys
+done

misc/cmake/script_pass_depends.py

@@ -0,0 +1,29 @@
+"""Extracts a list of requirements from a `ScriptPass` command.
+
+Not entirely accurate, but very easy to implement. Should probably be replaced with an implementation
+in the kernel that performs the same extraction in a principled way.
+"""
+
+import re
+import sys
+import subprocess
+
+for name in sys.argv[1:]:
+	output = subprocess.check_output(["./yosys", "-QT", "-p", f"help {name}"], encoding="ascii")
+	header = False
+	passes = []
+	for line in output.splitlines():
+		if line == "The following commands are executed by this synthesis command:":
+			header = True
+			continue
+		if header:
+			if m := re.match(r"^        \s*(\w+)", line):
+				passes.append(m[1])
+	if not header:
+		print(output)
+		sys.exit(1)
+	print()
+	print(f"===> {name}")
+	for p in sorted(set(passes)):
+		print(f"\t\t{p}")
+	print()