switch to CGO-free builds

vendor/modernc.org/libc/Makefile

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+# Copyright 2024 The Libc Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+.PHONY:	all build_all_targets check clean download edit editor generate dev membrk-test test work xtest short-test xlibc libc-test surface
+
+SHELL=/bin/bash -o pipefail	
+
+DIR = /tmp/libc
+TAR = musl-7ada6dde6f9dc6a2836c3d92c2f762d35fd229e0.tar.gz
+URL = https://git.musl-libc.org/cgit/musl/snapshot/$(TAR)
+
+all: editor
+	golint 2>&1
+	staticcheck 2>&1
+
+build_all_targets:
+	./build_all_targets.sh
+	echo done
+
+clean:
+	rm -f log-* cpu.test mem.test *.out
+	git clean -fd
+	find testdata/nsz.repo.hu/ -name \*.go -delete
+	make -C testdata/nsz.repo.hu/libc-test/ cleanall
+	go clean
+
+check:
+	staticcheck 2>&1 | grep -v U1000
+
+download:
+	@if [ ! -f $(TAR) ]; then wget $(URL) ; fi
+
+edit:
+	@touch log
+	@if [ -f "Session.vim" ]; then novim -S & else novim -p Makefile all_musl_test.go generator.go libc.go libc_musl.go & fi
+
+editor:
+	gofmt -l -s -w *.go 2>&1 | tee log-editor
+	go test -c -o /dev/null 2>&1 | tee -a log-editor
+	go install -v  2>&1 | tee -a log-editor
+	go build -o /dev/null generator*.go
+
+generate: download
+	mkdir -p $(DIR) || true
+	rm -rf $(DIR)/*
+	GO_GENERATE_DIR=$(DIR) go run generator*.go 2>&1 | tee log-generate
+	go build -v
+	# go install github.com/mdempsky/unconvert@latest
+	go build -v 2>&1 | tee -a log-generate
+	go test -v -short -count=1 ./... | tee -a log-generate
+	git status | tee -a log-generate
+	grep 'TRC\|TODO\|ERRORF\|FAIL' log-generate || true
+
+dev: download
+	mkdir -p $(DIR) || true
+	rm -rf $(DIR)/*
+	echo -n > /tmp/ccgo.log
+	GO_GENERATE_DIR=$(DIR) GO_GENERATE_DEV=1 go run -tags=ccgo.dmesg,ccgo.assert generator*.go 2>&1 | tee log-generate
+	go build -v | tee -a log-generate
+	go test -v -short -count=1 ./... | tee -a log-generate
+	git status | tee -a log-generate
+	grep 'TRC\|TODO\|ERRORF\|FAIL' log-generate || true
+	grep 'TRC\|TODO\|ERRORF\|FAIL' /tmp/ccgo.log || true
+
+membrk-test:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 -tags=libc.membrk 2>&1 | tee log-test
+	grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+
+test:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 2>&1 | tee log-test
+
+short-test:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 -short 2>&1 | tee log-test
+	grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+
+xlibc:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 -tags=ccgo.dmesg,ccgo.assert 2>&1 -run TestLibc | tee log-test
+	grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+
+xpthread:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 2>&1 -run TestLibc -re pthread | tee log-test
+	grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+
+libc-test:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 2>&1 -run TestLibc | tee log-test
+	# grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+	grep -o 'undefined: \<.*\>' log-test | sort -u
+
+xtest:
+	echo -n > /tmp/ccgo.log
+	touch log-test
+	cp log-test log-test0
+	go test -v -timeout 24h -count=1 -tags=ccgo.dmesg,ccgo.assert 2>&1 | tee log-test
+	grep -a 'TRC\|TODO\|ERRORF\|FAIL' log-test || true 2>&1 | tee -a log-test
+
+work:
+	rm -f go.work*
+	go work init
+	go work use .
+	go work use ../ccgo/v4
+	go work use ../ccgo/v3
+	go work use ../cc/v4
+
+surface:
+	surface > surface.new
+	surface surface.old surface.new > log-todo-surface || true