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v/vlib/compiler/cc.v

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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module compiler
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import (
os
time
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filepath
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v.pref
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)
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fn todo() {
}
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fn (v &V) no_cc_installed() bool {
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$if windows {
os.exec('$v.pref.ccompiler -v')or{
if v.pref.is_verbose {
println('C compiler not found, trying to build with msvc...')
}
return true
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}
}
return false
}
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fn (v mut V) cc() {
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if os.executable().contains('vfmt') {
return
}
v.build_thirdparty_obj_files()
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vexe := pref.vexe_path()
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vdir := filepath.dir(vexe)
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// Just create a C/JavaScript file and exit
// for example: `v -o v.c compiler`
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ends_with_c := v.pref.out_name.ends_with('.c')
ends_with_js := v.pref.out_name.ends_with('.js')
if v.pref.is_pretty_c && !ends_with_js {
format_result := os.exec('clang-format -i -style=file "$v.out_name_c"') or {
eprintln('clang-format not found')
os.Result{exit_code:-1}
}
if format_result.exit_code > 0 {
eprintln('clang-format failed to format $v.out_name_c')
eprintln(format_result.output)
}
}
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if ends_with_c || ends_with_js {
// Translating V code to JS by launching vjs.
// Using a separate process for V.js is for performance mostly,
// to avoid constant is_js checks.
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$if !js {
if ends_with_js {
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vjs_path := vexe + 'js'
if !os.exists(vjs_path) {
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println('V.js compiler not found, building...')
// Build V.js. Specifying `-os js` makes V include
// only _js.v files and ignore _c.v files.
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ret := os.system('$vexe -o $vjs_path -os js $vdir/cmd/v')
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if ret == 0 {
println('Done.')
}
else {
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println('Failed.')
exit(1)
}
}
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ret := os.system('$vjs_path -o $v.pref.out_name $v.pref.path')
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if ret == 0 {
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println('Done. Run it with `node $v.pref.out_name`')
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println('JS backend is at a very early stage.')
}
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}
}
// v.out_name_c may be on a different partition than v.out_name
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os.mv_by_cp(v.out_name_c, v.pref.out_name)or{
panic(err)
}
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exit(0)
}
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// Cross compiling for Windows
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if v.pref.os == .windows {
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$if !windows {
v.cc_windows_cross()
return
}
}
$if windows {
if v.pref.ccompiler == 'msvc' || v.no_cc_installed() {
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v.cc_msvc()
return
}
}
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// arguments for the C compiler
mut a := [v.pref.cflags, '-std=gnu11', '-Wall', '-Wextra',
// TODO : activate -Werror once no warnings remain
// '-Werror',
// TODO : try and remove the below workaround options when the corresponding
// warnings are totally fixed/removed
'-Wno-unused-variable',
// '-Wno-unused-but-set-variable',
'-Wno-unused-parameter', '-Wno-unused-result', '-Wno-unused-function', '-Wno-missing-braces', '-Wno-unused-label']
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// TCC on Linux by default, unless -cc was provided
// TODO if -cc = cc, TCC is still used, default compiler should be
// used instead.
if v.pref.fast {
$if linux {
$if !android {
tcc_3rd := '$vdir/thirdparty/tcc/bin/tcc'
// println('tcc third "$tcc_3rd"')
tcc_path := '/var/tmp/tcc/bin/tcc'
if os.exists(tcc_3rd) && !os.exists(tcc_path) {
// println('moving tcc')
// if there's tcc in thirdparty/, that means this is
// a prebuilt V_linux.zip.
// Until the libtcc1.a bug is fixed, we neeed to move
// it to /var/tmp/
os.system('mv $vdir/thirdparty/tcc /var/tmp/')
}
if v.pref.ccompiler == 'cc' && os.exists(tcc_path) {
// TODO tcc bug, needs an empty libtcc1.a fila
// os.mkdir('/var/tmp/tcc/lib/tcc/') or { panic(err) }
// os.create('/var/tmp/tcc/lib/tcc/libtcc1.a')
v.pref.ccompiler = tcc_path
a << '-m64'
}
}
} $else {
verror('-fast is only supported on Linux right now')
}
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}
if !v.pref.is_so
&& v.pref.build_mode != .build_module
&& os.user_os() == 'windows'
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&& !v.pref.out_name.ends_with('.exe')
{
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v.pref.out_name += '.exe'
}
// linux_host := os.user_os() == 'linux'
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v.log('cc() isprod=$v.pref.is_prod outname=$v.pref.out_name')
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if v.pref.is_so {
a << '-shared -fPIC ' // -Wl,-z,defs'
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v.pref.out_name += '.so'
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}
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if v.pref.is_bare {
a << '-fno-stack-protector -static -ffreestanding -nostdlib'
}
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if v.pref.build_mode == .build_module {
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// Create the modules & out directory if it's not there.
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mut out_dir := if v.pref.path.starts_with('vlib') { '$v_modules_path${filepath.separator}cache${filepath.separator}$v.pref.path' } else { '$v_modules_path${filepath.separator}$v.pref.path' }
pdir := out_dir.all_before_last(filepath.separator)
if !os.is_dir(pdir) {
os.mkdir_all(pdir)
}
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v.pref.out_name = '${out_dir}.o' // v.out_name
println('Building ${v.pref.out_name}...')
}
debug_mode := v.pref.is_debug
mut debug_options := '-g'
mut optimization_options := '-O2'
mut guessed_compiler := v.pref.ccompiler
if guessed_compiler == 'cc' && v.pref.is_prod {
// deliberately guessing only for -prod builds for performance reasons
if ccversion:=os.exec('cc --version'){
if ccversion.exit_code == 0 {
if ccversion.output.contains('This is free software;') && ccversion.output.contains('Free Software Foundation, Inc.') {
guessed_compiler = 'gcc'
}
if ccversion.output.contains('clang version ') {
guessed_compiler = 'clang'
}
}
}
}
if v.pref.ccompiler.contains('clang') || guessed_compiler == 'clang' {
if debug_mode {
debug_options = '-g -O0 -no-pie'
}
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optimization_options = '-O3'
mut have_flto := true
$if openbsd {
have_flto = false
}
if have_flto {
optimization_options += ' -flto'
}
}
if v.pref.ccompiler.contains('gcc') || guessed_compiler == 'gcc' {
if debug_mode {
debug_options = '-g3 -no-pie'
}
optimization_options = '-O3 -fno-strict-aliasing -flto'
}
if debug_mode {
a << debug_options
}
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if v.pref.is_prod {
a << optimization_options
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}
if debug_mode && os.user_os() != 'windows' {
a << ' -rdynamic ' // needed for nicer symbolic backtraces
}
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if v.pref.ccompiler != 'msvc' && v.pref.os != .freebsd {
a << '-Werror=implicit-function-declaration'
}
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for f in v.generate_hotcode_reloading_compiler_flags() {
a << f
}
mut libs := '' // builtin.o os.o http.o etc
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if v.pref.build_mode == .build_module {
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a << '-c'
}
else if v.pref.is_cache {
builtin_o_path := filepath.join(v_modules_path,'cache','vlib','builtin.o')
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a << builtin_o_path.replace('builtin.o', 'strconv.o') // TODO hack no idea why this is needed
if os.exists(builtin_o_path) {
libs = builtin_o_path
}
else {
println('$builtin_o_path not found... building module builtin')
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os.system('$vexe build module vlib${filepath.separator}builtin')
}
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for imp in v.table.imports {
if imp.contains('vweb') {
continue
} // not working
if imp == 'webview' {
continue
}
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imp_path := imp.replace('.', filepath.separator)
path := '$v_modules_path${filepath.separator}cache${filepath.separator}vlib${filepath.separator}${imp_path}.o'
// println('adding ${imp_path}.o')
if os.exists(path) {
libs += ' ' + path
}
else {
println('$path not found... building module $imp')
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if path.ends_with('vlib/ui.o') {
println('copying ui...')
os.cp('$vdir/thirdparty/ui/ui.o', path)or{
panic('error copying ui files')
}
os.cp('$vdir/thirdparty/ui/ui.vh', v_modules_path + '/vlib/ui.vh')or{
panic('error copying ui files')
}
}
else {
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os.system('$vexe build module vlib${filepath.separator}$imp_path')
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}
}
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if path.ends_with('vlib/ui.o') {
a << '-framework Cocoa -framework Carbon'
}
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}
}
if v.pref.sanitize {
a << '-fsanitize=leak'
}
// Cross compiling linux TODO
/*
sysroot := '/tmp/lld/linuxroot/'
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if v.os == .linux && !linux_host {
// Build file.o
a << '-c --sysroot=$sysroot -target x86_64-linux-gnu'
// Right now `out_name` can be `file`, not `file.o`
if !v.out_name.ends_with('.o') {
v.out_name = v.out_name + '.o'
}
}
*/
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// Cross compiling windows
//
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// Output executable name
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a << '-o "$v.pref.out_name"'
if os.is_dir(v.pref.out_name) {
verror("\'$v.pref.out_name\' is a directory")
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}
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// macOS code can include objective C TODO remove once objective C is replaced with C
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if v.pref.os == .mac {
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a << '-x objective-c'
}
// The C file we are compiling
a << '"$v.out_name_c"'
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if v.pref.os == .mac {
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a << '-x none'
}
// Min macos version is mandatory I think?
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if v.pref.os == .mac {
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a << '-mmacosx-version-min=10.7'
}
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if v.pref.os == .windows {
a << '-municode'
}
cflags := v.get_os_cflags()
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// add .o files
a << cflags.c_options_only_object_files()
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// add all flags (-I -l -L etc) not .o files
a << cflags.c_options_without_object_files()
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a << libs
// Without these libs compilation will fail on Linux
// || os.user_os() == 'linux'
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if !v.pref.is_bare && v.pref.build_mode != .build_module && v.pref.os in [.linux, .freebsd, .openbsd, .netbsd, .dragonfly, .solaris, .haiku] {
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a << '-lm -lpthread '
// -ldl is a Linux only thing. BSDs have it in libc.
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if v.pref.os == .linux {
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a << ' -ldl '
}
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if v.pref.os == .freebsd {
// FreeBSD: backtrace needs execinfo library while linking
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a << ' -lexecinfo '
}
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}
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if !v.pref.is_bare && v.pref.os == .js && os.user_os() == 'linux' {
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a << '-lm'
}
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args := a.join(' ')
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start:
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todo()
// TODO remove
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cmd := '${v.pref.ccompiler} $args'
// Run
if v.pref.show_c_cmd || v.pref.is_verbose {
println('\n==========')
println(cmd)
}
ticks := time.ticks()
res := os.exec(cmd)or{
// C compilation failed.
// If we are on Windows, try msvc
println('C compilation failed.')
/*
if os.user_os() == 'windows' && v.pref.ccompiler != 'msvc' {
println('Trying to build with MSVC')
v.cc_msvc()
return
}
*/
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verror(err)
return
}
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if res.exit_code != 0 {
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// the command could not be found by the system
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if res.exit_code == 127 {
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$if linux {
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// TCC problems on linux? Try GCC.
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if v.pref.ccompiler.contains('tcc') {
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v.pref.ccompiler = 'cc'
goto start
}
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}
verror('C compiler error, while attempting to run: \n' + '-----------------------------------------------------------\n' + '$cmd\n' + '-----------------------------------------------------------\n' + 'Probably your C compiler is missing. \n' + 'Please reinstall it, or make it available in your PATH.\n\n' + missing_compiler_info())
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}
if v.pref.is_debug {
println(res.output)
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verror("
==================
C error. This should never happen.
V compiler version: V $Version $vhash()
Host OS: ${pref.get_host_os().str()}
Target OS: $v.pref.os.str()
If you were not working with C interop and are not sure about what's happening,
please put the whole output in a pastebin and contact us through the following ways with a link to the pastebin:
- Raise an issue on GitHub: https://github.com/vlang/v/issues/new/choose
- Ask a question in #help on Discord: https://discord.gg/vlang")
}
else {
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if res.output.len < 30 {
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println(res.output)
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} else {
q := res.output.all_after('error: ').limit(150)
println('==================')
println(q)
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println('...')
println('==================')
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println('(Use `v -cg` to print the entire error message)\n')
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}
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verror("C error.
Please make sure that:
- You have all V dependencies installed.
- You did not declare a C function that was not included. (Try commenting your code that involves C interop)
- You are running the latest version of V. (Try running `v up` and rerunning your command)
If you're confident that all of the above is true, please try running V with the `-cg` option which enables more debugging capabilities.\n")
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}
}
diff := time.ticks() - ticks
// Print the C command
if v.pref.show_c_cmd || v.pref.is_verbose {
println('${v.pref.ccompiler} took $diff ms')
println('=========\n')
}
// Link it if we are cross compiling and need an executable
/*
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if v.os == .linux && !linux_host && v.pref.build_mode != .build {
v.out_name = v.out_name.replace('.o', '')
obj_file := v.out_name + '.o'
println('linux obj_file=$obj_file out_name=$v.out_name')
ress := os.exec('/usr/local/Cellar/llvm/8.0.0/bin/ld.lld --sysroot=$sysroot ' +
'-v -o $v.out_name ' +
'-m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 ' +
'/usr/lib/x86_64-linux-gnu/crt1.o ' +
'$sysroot/lib/x86_64-linux-gnu/libm-2.28.a ' +
'/usr/lib/x86_64-linux-gnu/crti.o ' +
obj_file +
' /usr/lib/x86_64-linux-gnu/libc.so ' +
'/usr/lib/x86_64-linux-gnu/crtn.o') or {
verror(err)
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return
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}
println(ress.output)
println('linux cross compilation done. resulting binary: "$v.out_name"')
}
*/
if !v.pref.is_keep_c && v.out_name_c != 'v.c' {
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os.rm(v.out_name_c)
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}
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if v.pref.compress {
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$if windows {
println('-compress does not work on Windows for now')
return
}
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ret := os.system('strip $v.pref.out_name')
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if ret != 0 {
println('strip failed')
return
}
// NB: upx --lzma can sometimes fail with NotCompressibleException
// See https://github.com/vlang/v/pull/3528
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mut ret2 := os.system('upx --lzma -qqq $v.pref.out_name')
if ret2 != 0 {
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ret2 = os.system('upx -qqq $v.pref.out_name')
}
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if ret2 != 0 {
println('upx failed')
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$if macos {
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println('install upx with `brew install upx`')
}
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$if linux {
println('install upx\n' + 'for example, on Debian/Ubuntu run `sudo apt install upx`')
}
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$if windows {
// :)
}
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}
}
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}
fn (c mut V) cc_windows_cross() {
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println('Cross compiling for Windows...')
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if !c.pref.out_name.ends_with('.exe') {
c.pref.out_name += '.exe'
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}
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mut args := '-o $c.pref.out_name -w -L. '
cflags := c.get_os_cflags()
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// -I flags
args += if c.pref.ccompiler == 'msvc' { cflags.c_options_before_target_msvc() } else { cflags.c_options_before_target() }
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mut libs := ''
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if false && c.pref.build_mode == .default_mode {
libs = '"$v_modules_path/vlib/builtin.o"'
if !os.exists(libs) {
println('`$libs` not found')
exit(1)
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}
for imp in c.table.imports {
libs += ' "$v_modules_path/vlib/${imp}.o"'
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}
}
args += ' $c.out_name_c '
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args += if c.pref.ccompiler == 'msvc' { cflags.c_options_after_target_msvc() } else { cflags.c_options_after_target() }
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/*
winroot := '$v_modules_path/winroot'
if !os.is_dir(winroot) {
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winroot_url := 'https://github.com/vlang/v/releases/download/v0.1.10/winroot.zip'
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println('"$winroot" not found.')
println('Download it from $winroot_url and save it in $v_modules_path')
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println('Unzip it afterwards.\n')
println('winroot.zip contains all library and header files needed ' + 'to cross-compile for Windows.')
exit(1)
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}
mut obj_name := c.out_name
obj_name = obj_name.replace('.exe', '')
obj_name = obj_name.replace('.o.o', '.o')
include := '-I $winroot/include '
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*/
mut cmd := ''
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cmd = ''
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$if macos {
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cmd = 'x86_64-w64-mingw32-gcc -std=gnu11 $args -municode'
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}
$else {
panic('your platform is not supported yet')
}
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println(cmd)
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//cmd := 'clang -o $obj_name -w $include -m32 -c -target x86_64-win32 $v_modules_path/$c.out_name_c'
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if c.pref.show_c_cmd {
println(cmd)
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}
if os.system(cmd) != 0 {
println('Cross compilation for Windows failed. Make sure you have clang installed.')
exit(1)
}
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/*
if c.pref.build_mode != .build_module {
link_cmd := 'lld-link $obj_name $winroot/lib/libcmt.lib ' + '$winroot/lib/libucrt.lib $winroot/lib/kernel32.lib $winroot/lib/libvcruntime.lib ' + '$winroot/lib/uuid.lib'
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if c.pref.show_c_cmd {
println(link_cmd)
}
if os.system(link_cmd) != 0 {
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println('Cross compilation for Windows failed. Make sure you have lld linker installed.')
exit(1)
}
// os.rm(obj_name)
}
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*/
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println('Done!')
}
fn (c &V) build_thirdparty_obj_files() {
for flag in c.get_os_cflags() {
if flag.value.ends_with('.o') {
rest_of_module_flags := c.get_rest_of_module_cflags(flag)
if c.pref.ccompiler == 'msvc' || c.no_cc_installed() {
build_thirdparty_obj_file_with_msvc(flag.value, rest_of_module_flags)
}
else {
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c.build_thirdparty_obj_file(flag.value, rest_of_module_flags)
}
}
}
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}
fn missing_compiler_info() string {
$if windows {
return 'https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Windows'
}
$if linux {
return 'On Debian/Ubuntu, run `sudo apt install build-essential`'
}
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$if macos {
return 'Install command line XCode tools with `xcode-select --install`'
}
return ''
}