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nocgo.go RawHistoryFolder

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
3
4//go:build !cgo && (darwin || freebsd || linux || netbsd)
5
6package purego
7
8// if CGO_ENABLED=0 import fakecgo to setup the Cgo runtime correctly.
9// This is required since some frameworks need TLS setup the C way which Go doesn't do.
10// We currently don't support ios in fakecgo mode so force Cgo or fail
11//
12// The way that the Cgo runtime (runtime/cgo) works is by setting some variables found
13// in runtime with non-null GCC compiled functions. The variables that are replaced are
14// var (
15//		iscgo             bool 							// in runtime/cgo.go
16//		_cgo_init         unsafe.Pointer 				// in runtime/cgo.go
17//		_cgo_thread_start unsafe.Pointer				// in runtime/cgo.go
18//		_cgo_notify_runtime_init_done unsafe.Pointer 	// in runtime/cgo.go
19//		_cgo_setenv unsafe.Pointer  					// in runtime/env_posix.go
20//		_cgo_unsetenv unsafe.Pointer					// in runtime/env_posix.go
21// )
22// importing fakecgo will set these (using //go:linkname) with functions written
23// entirely in Go (except for some assembly trampolines to change GCC ABI to Go ABI).
24// Doing so makes it possible to build applications that call into C without CGO_ENABLED=1.
25import _ "github.com/bnema/purego/internal/fakecgo"

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