src/syscall/mkall.sh - go - Git at Google

 #!/usr/bin/env bash
 # Copyright 2009 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.

 # The syscall package provides access to the raw system call
 # interface of the underlying operating system.  Porting Go to
 # a new architecture/operating system combination requires
 # some manual effort, though there are tools that automate
 # much of the process.  The auto-generated files have names
 # beginning with z.
 #
 # This script runs or (given -n) prints suggested commands to generate z files
 # for the current system.  Running those commands is not automatic.
 # This script is documentation more than anything else.
 #
 # * asm_${GOOS}_${GOARCH}.s
 #
 # This hand-written assembly file implements system call dispatch.
 # There are three entry points:
 #
 # 	func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
 # 	func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
 # 	func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
 #
 # The first and second are the standard ones; they differ only in
 # how many arguments can be passed to the kernel.
 # The third is for low-level use by the ForkExec wrapper;
 # unlike the first two, it does not call into the scheduler to
 # let it know that a system call is running.
 #
 # * syscall_${GOOS}.go
 #
 # This hand-written Go file implements system calls that need
 # special handling and lists "//sys" comments giving prototypes
 # for ones that can be auto-generated.  Mksyscall reads those
 # comments to generate the stubs.
 #
 # * syscall_${GOOS}_${GOARCH}.go
 #
 # Same as syscall_${GOOS}.go except that it contains code specific
 # to ${GOOS} on one particular architecture.
 #
 # * types_${GOOS}.c
 #
 # This hand-written C file includes standard C headers and then
 # creates typedef or enum names beginning with a dollar sign
 # (use of $ in variable names is a gcc extension).  The hardest
 # part about preparing this file is figuring out which headers to
 # include and which symbols need to be #defined to get the
 # actual data structures that pass through to the kernel system calls.
 # Some C libraries present alternate versions for binary compatibility
 # and translate them on the way in and out of system calls, but
 # there is almost always a #define that can get the real ones.
 # See types_darwin.c and types_linux.c for examples.
 #
 # * zerror_${GOOS}_${GOARCH}.go
 #
 # This machine-generated file defines the system's error numbers,
 # error strings, and signal numbers.  The generator is "mkerrors.sh".
 # Usually no arguments are needed, but mkerrors.sh will pass its
 # arguments on to godefs.
 #
 # * zsyscall_${GOOS}_${GOARCH}.go
 #
 # Generated by mksyscall.pl; see syscall_${GOOS}.go above.
 #
 # * zsysnum_${GOOS}_${GOARCH}.go
 #
 # Generated by mksysnum_${GOOS}.
 #
 # * ztypes_${GOOS}_${GOARCH}.go
 #
 # Generated by godefs; see types_${GOOS}.c above.

 GOOSARCH="${GOOS}_${GOARCH}"

 # defaults
 mksyscall="./mksyscall.pl"
 mkerrors="./mkerrors.sh"
 zerrors="zerrors_$GOOSARCH.go"
 mksysctl=""
 zsysctl="zsysctl_$GOOSARCH.go"
 mksysnum=
 mktypes=
 mkasm=
 run="sh"

 case "$1" in
 -syscalls)
 	shift
 	for i in ${@:-zsyscall*go}
 	do
 		# Run the command line that appears in the first line
 		# of the generated file to regenerate it.
 		sed 1q $i | sed 's;^// ;./;' | sh > _$i && gofmt < _$i > $i
 		rm _$i
 	done
 	exit 0
 	;;
 -n)
 	run="cat"
 	shift
 esac

 case "$#" in
 0)
 	;;
 *)
 	echo 'usage: mkall.sh [-n]' 1>&2
 	exit 2
 esac

 GOOSARCH_in=syscall_$GOOSARCH.go
 case "$GOOSARCH" in
 _* | *_ | _)
 	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
 	exit 1
 	;;
 aix_ppc64)
 	mkerrors="$mkerrors -maix64"
 	mksyscall="./mksyscall_libc.pl -aix"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 darwin_amd64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -darwin"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	mkasm="go run mkasm.go"
 	;;
 darwin_arm64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -darwin"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	mkasm="go run mkasm.go"
 	;;
 dragonfly_amd64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -dragonfly"
 	mksysnum="curl -s 'http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master' | ./mksysnum_dragonfly.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 freebsd_386)
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32"
 	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 freebsd_amd64)
 	mkerrors="$mkerrors -m64"
 	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 freebsd_arm)
 	mkerrors="$mkerrors"
 	mksyscall="./mksyscall.pl -l32 -arm"
 	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
 freebsd_arm64)
 	mkerrors="$mkerrors"
 	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' | ./mksysnum_freebsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
 freebsd_riscv64)
 	mkerrors="$mkerrors"
 	mksysnum="curl -s 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12' | ./mksysnum_freebsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
 linux_386)
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32"
 	mksysnum="./mksysnum_linux.pl /usr/include/asm/unistd_32.h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_amd64)
 	unistd_h=$(ls -1 /usr/include/asm/unistd_64.h /usr/include/x86_64-linux-gnu/asm/unistd_64.h 2>/dev/null | head -1)
 	if [ "$unistd_h" = "" ]; then
 		echo >&2 cannot find unistd_64.h
 		exit 1
 	fi
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_arm)
 	mkerrors="$mkerrors"
 	mksyscall="./mksyscall.pl -l32 -arm"
 	mksysnum="curl -s 'http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/arch/arm/include/uapi/asm/unistd.h' | ./mksysnum_linux.pl -"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_arm64)
 	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null | head -1)
 	if [ "$unistd_h" = "" ]; then
 		echo >&2 cannot find unistd_64.h
 		exit 1
 	fi
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
 linux_loong64)
         GOOSARCH_in=syscall_linux_loong64.go
         unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null | head -1)
         if [ "$unistd_h" = "" ]; then
                 echo >&2 cannot find unistd.h
                 exit 1
         fi
         mksysnum="./mksysnum_linux.pl $unistd_h"
         mktypes="GOARCH=$GOARCH go tool cgo -godefs"
         ;;
 linux_mips)
 	GOOSARCH_in=syscall_linux_mipsx.go
 	unistd_h=/usr/include/asm/unistd.h
 	mksyscall="./mksyscall.pl -b32 -arm"
 	mkerrors="$mkerrors"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_mipsle)
 	GOOSARCH_in=syscall_linux_mipsx.go
 	unistd_h=/usr/include/asm/unistd.h
 	mksyscall="./mksyscall.pl -l32 -arm"
 	mkerrors="$mkerrors"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_mips64)
 	GOOSARCH_in=syscall_linux_mips64x.go
 	unistd_h=/usr/include/asm/unistd.h
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_mips64le)
 	GOOSARCH_in=syscall_linux_mips64x.go
 	unistd_h=/usr/include/asm/unistd.h
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_ppc64)
 	GOOSARCH_in=syscall_linux_ppc64x.go
 	unistd_h=/usr/include/asm/unistd.h
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_ppc64le)
 	GOOSARCH_in=syscall_linux_ppc64x.go
 	unistd_h=/usr/include/powerpc64le-linux-gnu/asm/unistd.h
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_riscv64)
 	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null | head -1)
 	if [ "$unistd_h" = "" ]; then
 		echo >&2 cannot find unistd_64.h
 		exit 1
 	fi
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 linux_s390x)
 	GOOSARCH_in=syscall_linux_s390x.go
 	unistd_h=/usr/include/asm/unistd.h
 	mkerrors="$mkerrors -m64"
 	mksysnum="./mksysnum_linux.pl $unistd_h"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 netbsd_386)
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32 -netbsd"
 	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 netbsd_amd64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -netbsd"
 	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 netbsd_arm)
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32 -netbsd -arm"
 	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 netbsd_arm64)
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -netbsd"
 	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 openbsd_386)
 	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32 -openbsd -libc"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	mkasm="go run mkasm.go"
 	;;
 openbsd_amd64)
 	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -openbsd -libc"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	mkasm="go run mkasm.go"
 	;;
 openbsd_arm)
 	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors"
 	mksyscall="./mksyscall.pl -l32 -openbsd -arm -libc"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	mkasm="go run mkasm.go"
 	;;
 openbsd_arm64)
 	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -openbsd -libc"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	mkasm="go run mkasm.go"
 	;;
 openbsd_mips64)
 	GOOSARCH_in="syscall_openbsd1.go syscall_openbsd_$GOARCH.go"
 	mkerrors="$mkerrors -m64"
 	mksyscall="./mksyscall.pl -openbsd"
 	mksysctl="./mksysctl_openbsd.pl"
 	zsysctl="zsysctl_openbsd.go"
 	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_openbsd.pl"
 	# Let the type of C char be signed to make the bare syscall
 	# API consistent between platforms.
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
 	;;
 plan9_386)
 	mkerrors=
 	mksyscall="./mksyscall.pl -l32 -plan9"
 	mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
 	mktypes="XXX"
 	;;
 solaris_amd64)
 	mksyscall="./mksyscall_libc.pl -solaris"
 	mkerrors="$mkerrors -m64"
 	mksysnum=
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
 windows_*)
 	echo 'run "go generate" instead' 1>&2
 	exit 1
 	;;
 *)
 	echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
 	exit 1
 	;;
 esac

 (
 	if [ -n "$mkerrors" ]; then echo "$mkerrors |gofmt >$zerrors"; fi
 	syscall_goos="syscall_$GOOS.go"
  	case "$GOOS" in
 	darwin | dragonfly | freebsd | netbsd | openbsd)
 		syscall_goos="syscall_bsd.go $syscall_goos"
  		;;
  	esac
 	if [ -n "$mksyscall" ]; then echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in |gofmt >zsyscall_$GOOSARCH.go"; fi
 	if [ -n "$mksysctl" ]; then echo "$mksysctl |gofmt >$zsysctl"; fi
 	if [ -n "$mksysnum" ]; then echo "$mksysnum |gofmt >zsysnum_$GOOSARCH.go"; fi
 	if [ -n "$mktypes" ]; then
 		# ztypes_$GOOSARCH.go could be erased before "go run mkpost.go" is called.
 		# Therefore, "go run" tries to recompile syscall package but ztypes is empty and it fails.
 		echo "$mktypes types_$GOOS.go |go run mkpost.go >ztypes_$GOOSARCH.go.NEW && mv ztypes_$GOOSARCH.go.NEW ztypes_$GOOSARCH.go";
 	fi
 	if [ -n "$mkasm" ]; then echo "$mkasm $GOOS $GOARCH"; fi
 ) | $run
	#!/usr/bin/env bash
	# Copyright 2009 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.

	# The syscall package provides access to the raw system call
	# interface of the underlying operating system. Porting Go to
	# a new architecture/operating system combination requires
	# some manual effort, though there are tools that automate
	# much of the process. The auto-generated files have names
	# beginning with z.
	#
	# This script runs or (given -n) prints suggested commands to generate z files
	# for the current system. Running those commands is not automatic.
	# This script is documentation more than anything else.
	#
	# * asm_${GOOS}_${GOARCH}.s
	#
	# This hand-written assembly file implements system call dispatch.
	# There are three entry points:
	#
	# func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
	# func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
	# func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr);
	#
	# The first and second are the standard ones; they differ only in
	# how many arguments can be passed to the kernel.
	# The third is for low-level use by the ForkExec wrapper;
	# unlike the first two, it does not call into the scheduler to
	# let it know that a system call is running.
	#
	# * syscall_${GOOS}.go
	#
	# This hand-written Go file implements system calls that need
	# special handling and lists "//sys" comments giving prototypes
	# for ones that can be auto-generated. Mksyscall reads those
	# comments to generate the stubs.
	#
	# * syscall_${GOOS}_${GOARCH}.go
	#
	# Same as syscall_${GOOS}.go except that it contains code specific
	# to ${GOOS} on one particular architecture.
	#
	# * types_${GOOS}.c
	#
	# This hand-written C file includes standard C headers and then
	# creates typedef or enum names beginning with a dollar sign
	# (use of $ in variable names is a gcc extension). The hardest
	# part about preparing this file is figuring out which headers to
	# include and which symbols need to be #defined to get the
	# actual data structures that pass through to the kernel system calls.
	# Some C libraries present alternate versions for binary compatibility
	# and translate them on the way in and out of system calls, but
	# there is almost always a #define that can get the real ones.
	# See types_darwin.c and types_linux.c for examples.
	#
	# * zerror_${GOOS}_${GOARCH}.go
	#
	# This machine-generated file defines the system's error numbers,
	# error strings, and signal numbers. The generator is "mkerrors.sh".
	# Usually no arguments are needed, but mkerrors.sh will pass its
	# arguments on to godefs.
	#
	# * zsyscall_${GOOS}_${GOARCH}.go
	#
	# Generated by mksyscall.pl; see syscall_${GOOS}.go above.
	#
	# * zsysnum_${GOOS}_${GOARCH}.go
	#
	# Generated by mksysnum_${GOOS}.
	#
	# * ztypes_${GOOS}_${GOARCH}.go
	#
	# Generated by godefs; see types_${GOOS}.c above.

	GOOSARCH="${GOOS}_${GOARCH}"

	# defaults
	mksyscall="./mksyscall.pl"
	mkerrors="./mkerrors.sh"
	zerrors="zerrors_$GOOSARCH.go"
	mksysctl=""
	zsysctl="zsysctl_$GOOSARCH.go"
	mksysnum=
	mktypes=
	mkasm=
	run="sh"

	case "$1" in
	-syscalls)
	shift
	for i in ${@:-zsyscall*go}
	do
	# Run the command line that appears in the first line
	# of the generated file to regenerate it.
	sed 1q $i \| sed 's;^// ;./;' \| sh > _$i && gofmt < _$i > $i
	rm _$i
	done
	exit 0
	;;
	-n)
	run="cat"
	shift
	esac

	case "$#" in
	0)
	;;
	*)
	echo 'usage: mkall.sh [-n]' 1>&2
	exit 2
	esac

	GOOSARCH_in=syscall_$GOOSARCH.go
	case "$GOOSARCH" in
	_* \| *_ \| _)
	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
	exit 1
	;;
	aix_ppc64)
	mkerrors="$mkerrors -maix64"
	mksyscall="./mksyscall_libc.pl -aix"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	darwin_amd64)
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -darwin"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	mkasm="go run mkasm.go"
	;;
	darwin_arm64)
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -darwin"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	mkasm="go run mkasm.go"
	;;
	dragonfly_amd64)
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -dragonfly"
	mksysnum="curl -s 'http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/sys/kern/syscalls.master' \| ./mksysnum_dragonfly.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	freebsd_386)
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32"
	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' \| ./mksysnum_freebsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	freebsd_amd64)
	mkerrors="$mkerrors -m64"
	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' \| ./mksysnum_freebsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	freebsd_arm)
	mkerrors="$mkerrors"
	mksyscall="./mksyscall.pl -l32 -arm"
	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' \| ./mksysnum_freebsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	;;
	freebsd_arm64)
	mkerrors="$mkerrors"
	mksysnum="curl -s 'http://svn.freebsd.org/base/stable/10/sys/kern/syscalls.master' \| ./mksysnum_freebsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	;;
	freebsd_riscv64)
	mkerrors="$mkerrors"
	mksysnum="curl -s 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12' \| ./mksysnum_freebsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	;;
	linux_386)
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32"
	mksysnum="./mksysnum_linux.pl /usr/include/asm/unistd_32.h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_amd64)
	unistd_h=$(ls -1 /usr/include/asm/unistd_64.h /usr/include/x86_64-linux-gnu/asm/unistd_64.h 2>/dev/null \| head -1)
	if [ "$unistd_h" = "" ]; then
	echo >&2 cannot find unistd_64.h
	exit 1
	fi
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_arm)
	mkerrors="$mkerrors"
	mksyscall="./mksyscall.pl -l32 -arm"
	mksysnum="curl -s 'http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/arch/arm/include/uapi/asm/unistd.h' \| ./mksysnum_linux.pl -"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_arm64)
	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null \| head -1)
	if [ "$unistd_h" = "" ]; then
	echo >&2 cannot find unistd_64.h
	exit 1
	fi
	mksysnum="./mksysnum_linux.pl $unistd_h"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	;;
	linux_loong64)
	GOOSARCH_in=syscall_linux_loong64.go
	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null \| head -1)
	if [ "$unistd_h" = "" ]; then
	echo >&2 cannot find unistd.h
	exit 1
	fi
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_mips)
	GOOSARCH_in=syscall_linux_mipsx.go
	unistd_h=/usr/include/asm/unistd.h
	mksyscall="./mksyscall.pl -b32 -arm"
	mkerrors="$mkerrors"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_mipsle)
	GOOSARCH_in=syscall_linux_mipsx.go
	unistd_h=/usr/include/asm/unistd.h
	mksyscall="./mksyscall.pl -l32 -arm"
	mkerrors="$mkerrors"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_mips64)
	GOOSARCH_in=syscall_linux_mips64x.go
	unistd_h=/usr/include/asm/unistd.h
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_mips64le)
	GOOSARCH_in=syscall_linux_mips64x.go
	unistd_h=/usr/include/asm/unistd.h
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_ppc64)
	GOOSARCH_in=syscall_linux_ppc64x.go
	unistd_h=/usr/include/asm/unistd.h
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_ppc64le)
	GOOSARCH_in=syscall_linux_ppc64x.go
	unistd_h=/usr/include/powerpc64le-linux-gnu/asm/unistd.h
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_riscv64)
	unistd_h=$(ls -1 /usr/include/asm/unistd.h /usr/include/asm-generic/unistd.h 2>/dev/null \| head -1)
	if [ "$unistd_h" = "" ]; then
	echo >&2 cannot find unistd_64.h
	exit 1
	fi
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	linux_s390x)
	GOOSARCH_in=syscall_linux_s390x.go
	unistd_h=/usr/include/asm/unistd.h
	mkerrors="$mkerrors -m64"
	mksysnum="./mksysnum_linux.pl $unistd_h"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	netbsd_386)
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32 -netbsd"
	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_netbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	netbsd_amd64)
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -netbsd"
	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_netbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	netbsd_arm)
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32 -netbsd -arm"
	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_netbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	netbsd_arm64)
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -netbsd"
	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_netbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	openbsd_386)
	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors -m32"
	mksyscall="./mksyscall.pl -l32 -openbsd -libc"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_openbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	mkasm="go run mkasm.go"
	;;
	openbsd_amd64)
	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -openbsd -libc"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_openbsd.pl"
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	mkasm="go run mkasm.go"
	;;
	openbsd_arm)
	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors"
	mksyscall="./mksyscall.pl -l32 -openbsd -arm -libc"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_openbsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	mkasm="go run mkasm.go"
	;;
	openbsd_arm64)
	GOOSARCH_in="syscall_openbsd_libc.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -openbsd -libc"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_openbsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	mkasm="go run mkasm.go"
	;;
	openbsd_mips64)
	GOOSARCH_in="syscall_openbsd1.go syscall_openbsd_$GOARCH.go"
	mkerrors="$mkerrors -m64"
	mksyscall="./mksyscall.pl -openbsd"
	mksysctl="./mksysctl_openbsd.pl"
	zsysctl="zsysctl_openbsd.go"
	mksysnum="curl -s 'http://cvsweb.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/syscalls.master' \| ./mksysnum_openbsd.pl"
	# Let the type of C char be signed to make the bare syscall
	# API consistent between platforms.
	mktypes="GOARCH=$GOARCH go tool cgo -godefs -- -fsigned-char"
	;;
	plan9_386)
	mkerrors=
	mksyscall="./mksyscall.pl -l32 -plan9"
	mksysnum="./mksysnum_plan9.sh /n/sources/plan9/sys/src/libc/9syscall/sys.h"
	mktypes="XXX"
	;;
	solaris_amd64)
	mksyscall="./mksyscall_libc.pl -solaris"
	mkerrors="$mkerrors -m64"
	mksysnum=
	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
	windows_*)
	echo 'run "go generate" instead' 1>&2
	exit 1
	;;
	*)
	echo 'unrecognized $GOOS_$GOARCH: ' "$GOOSARCH" 1>&2
	exit 1
	;;
	esac

	(
	if [ -n "$mkerrors" ]; then echo "$mkerrors \|gofmt >$zerrors"; fi
	syscall_goos="syscall_$GOOS.go"
	case "$GOOS" in
	darwin \| dragonfly \| freebsd \| netbsd \| openbsd)
	syscall_goos="syscall_bsd.go $syscall_goos"
	;;
	esac
	if [ -n "$mksyscall" ]; then echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in \|gofmt >zsyscall_$GOOSARCH.go"; fi
	if [ -n "$mksysctl" ]; then echo "$mksysctl \|gofmt >$zsysctl"; fi
	if [ -n "$mksysnum" ]; then echo "$mksysnum \|gofmt >zsysnum_$GOOSARCH.go"; fi
	if [ -n "$mktypes" ]; then
	# ztypes_$GOOSARCH.go could be erased before "go run mkpost.go" is called.
	# Therefore, "go run" tries to recompile syscall package but ztypes is empty and it fails.
	echo "$mktypes types_$GOOS.go \|go run mkpost.go >ztypes_$GOOSARCH.go.NEW && mv ztypes_$GOOSARCH.go.NEW ztypes_$GOOSARCH.go";
	fi
	if [ -n "$mkasm" ]; then echo "$mkasm $GOOS $GOARCH"; fi
	) \| $run