mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-03 02:27:48 +00:00
Ayke van Laethem
9cad8bd0c8
On Debian, all LLVM commands have a version suffix (clang-8, ld.lld-8, wasm-ld-8, etc.). However. Most other distributions only provide a version prefix for Clang and not for all the other commands. This commit fixes the issue by trying the command with the version suffix first and falling back to one without if needed.
69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
// +build byollvm
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package main
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// This file provides a Link() function that uses the bundled lld if possible.
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import (
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"errors"
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"os"
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"os/exec"
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"unsafe"
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)
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/*
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#include <stdbool.h>
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#include <stdlib.h>
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bool tinygo_link_elf(int argc, char **argv);
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bool tinygo_link_wasm(int argc, char **argv);
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*/
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import "C"
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// Link invokes a linker with the given name and flags.
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//
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// This version uses the built-in linker when trying to use lld.
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func Link(linker string, flags ...string) error {
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switch linker {
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case "ld.lld":
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flags = append([]string{"tinygo:" + linker}, flags...)
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var cflag *C.char
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buf := C.calloc(C.size_t(len(flags)), C.size_t(unsafe.Sizeof(cflag)))
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cflags := (*[1 << 10]*C.char)(unsafe.Pointer(buf))[:len(flags):len(flags)]
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for i, flag := range flags {
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cflag := C.CString(flag)
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cflags[i] = cflag
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defer C.free(unsafe.Pointer(cflag))
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}
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ok := C.tinygo_link_elf(C.int(len(flags)), (**C.char)(buf))
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if !ok {
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return errors.New("failed to link using built-in ld.lld")
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}
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return nil
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case "wasm-ld":
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flags = append([]string{"tinygo:" + linker}, flags...)
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var cflag *C.char
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buf := C.calloc(C.size_t(len(flags)), C.size_t(unsafe.Sizeof(cflag)))
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defer C.free(buf)
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cflags := (*[1 << 10]*C.char)(unsafe.Pointer(buf))[:len(flags):len(flags)]
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for i, flag := range flags {
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cflag := C.CString(flag)
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cflags[i] = cflag
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defer C.free(unsafe.Pointer(cflag))
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}
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ok := C.tinygo_link_wasm(C.int(len(flags)), (**C.char)(buf))
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if !ok {
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return errors.New("failed to link using built-in wasm-ld")
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}
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return nil
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default:
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// Fall back to external command.
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if cmdNames, ok := commands[linker]; ok {
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return execCommand(cmdNames, flags...)
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}
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cmd := exec.Command(linker, flags...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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return cmd.Run()
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}
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}
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