// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

/*
#cgo LDFLAGS: -fsanitize=memory
#cgo CPPFLAGS: -fsanitize=memory

#include <string.h>
#include <stdint.h>
#include <stdlib.h>

void f(int32_t *p, int n) {
  int32_t * volatile q = (int32_t *)malloc(sizeof(int32_t) * n);
  memcpy(p, q, n * sizeof(*p));

#cgo solaris LDFLAGS: -lsocket

// Use -fno-stack-protector to avoid problems locating the
// proper support functions. See issues #52919, #54313, #58385.
#cgo CFLAGS: -Wall -Werror -fno-stack-protector

#cgo solaris CPPFLAGS: -D_POSIX_PTHREAD_SEMANTICS

*/
import "C"

import "runtime/internal/sys"

// Incomplete is used specifically for the semantics of incomplete C types.
type Incomplete struct {
	_ sys.NotInHeap

// stack marked as uninitialized, potentially causing a later error
// when the stack is used for something else. Issue 26209.

/*
#cgo LDFLAGS: -fsanitize=memory
#cgo CPPFLAGS: -fsanitize=memory

#include <stdint.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
	uintptr_t a[20];
} S;

S f() {
	S *p;

	p = (S *)(malloc(sizeof(S)));
	p->a[0] = 0;

			}
			args[i] = arg
		}

		switch verb {
		case "CFLAGS", "CPPFLAGS", "CXXFLAGS", "FFLAGS", "LDFLAGS":
			// Change relative paths to absolute.
			ctxt.makePathsAbsolute(args, di.Dir)
		}

		switch verb {
		case "CFLAGS":
			di.CgoCFLAGS = append(di.CgoCFLAGS, args...)
		case "CPPFLAGS":
			di.CgoCPPFLAGS = append(di.CgoCPPFLAGS, args...)
		case "CXXFLAGS":

are not subject to the security limitations described above.

All the cgo CPPFLAGS and CFLAGS directives in a package are concatenated and
used to compile C files in that package. All the CPPFLAGS and CXXFLAGS
directives in a package are concatenated and used to compile C++ files in that
package. All the CPPFLAGS and FFLAGS directives in a package are concatenated

// but are costly to evaluate.
func ExtraEnvVarsCostly() []cfg.EnvVar {
	b := work.NewBuilder("")
	defer func() {
		if err := b.Close(); err != nil {
			base.Fatal(err)
		}
	}()

	cppflags, cflags, cxxflags, fflags, ldflags, err := b.CFlags(&load.Package{})
	if err != nil {
		// Should not happen - b.CFlags was given an empty package.
		fmt.Fprintf(os.Stderr, "go: invalid cflags: %v\n", err)
		return nil

			}
			args[i] = arg
		}

		switch verb {
		case "CFLAGS", "CPPFLAGS", "CXXFLAGS", "FFLAGS", "LDFLAGS":
			// Change relative paths to absolute.
			ctxt.makePathsAbsolute(args, di.Dir)
		}

		switch verb {
		case "CFLAGS":
			di.CgoCFLAGS = append(di.CgoCFLAGS, args...)
		case "CPPFLAGS":
			di.CgoCPPFLAGS = append(di.CgoCPPFLAGS, args...)
		case "CXXFLAGS":

	}
	return args
}

// CFlags returns the flags to use when invoking the C, C++ or Fortran compilers, or cgo.
func (b *Builder) CFlags(p *load.Package) (cppflags, cflags, cxxflags, fflags, ldflags []string, err error) {
	if cppflags, err = buildFlags("CPPFLAGS", "", p.CgoCPPFLAGS, checkCompilerFlags); err != nil {
		return
	}
	if cflags, err = buildFlags("CFLAGS", DefaultCFlags, p.CgoCFLAGS, checkCompilerFlags); err != nil {