// findgoversion determines the Go version to use in the version string.
static char*
findgoversion(void)
{
char *tag, *rev, *p;
int i, nrev;
Buf b, path, bmore, branch;
Vec tags;
binit(&b);
binit(&path);
binit(&bmore);
binit(&branch);
vinit(&tags);
// The $GOROOT/VERSION file takes priority, for distributions
// without the Mercurial repo.
bpathf(&path, "%s/VERSION", goroot);
if(isfile(bstr(&path))) {
readfile(&b, bstr(&path));
chomp(&b);
// Commands such as "dist version > VERSION" will cause
// the shell to create an empty VERSION file and set dist's
// stdout to its fd. dist in turn looks at VERSION and uses
// its content if available, which is empty at this point.
if(b.len > 0)
goto done;
}
// The $GOROOT/VERSION.cache file is a cache to avoid invoking
// hg every time we run this command. Unlike VERSION, it gets
// deleted by the clean command.
bpathf(&path, "%s/VERSION.cache", goroot);
if(isfile(bstr(&path))) {
readfile(&b, bstr(&path));
chomp(&b);
goto done;
}
// Otherwise, use Mercurial.
// What is the current branch?
run(&branch, goroot, CheckExit, "hg", "identify", "-b", nil);
chomp(&branch);
// What are the tags along the current branch?
tag = "devel";
rev = ".";
run(&b, goroot, CheckExit, "hg", "log", "-b", bstr(&branch), "-r", ".:0", "--template", "{tags} + ", nil);
splitfields(&tags, bstr(&b));
nrev = 0;
for(i=0; i<tags.len; i++) {
p = tags.p[i];
if(streq(p, "+"))
nrev++;
// NOTE: Can reenable the /* */ code when we want to
// start reporting versions named 'weekly' again.
if(/*hasprefix(p, "weekly.") ||*/ hasprefix(p, "go")) {
tag = xstrdup(p);
// If this tag matches the current checkout
// exactly (no "+" yet), don't show extra
// revision information.
if(nrev == 0)
rev = "";
break;
}
}
if(tag[0] == '\0') {
// Did not find a tag; use branch name.
bprintf(&b, "branch.%s", bstr(&branch));
tag = btake(&b);
}
if(rev[0]) {
// Tag is before the revision we're building.
// Add extra information.
run(&bmore, goroot, CheckExit, "hg", "log", "--template", " +{node|short} {date|date}", "-r", rev, nil);
chomp(&bmore);
}
bprintf(&b, "%s", tag);
if(bmore.len > 0)
bwriteb(&b, &bmore);
// Cache version.
writefile(&b, bstr(&path), 0);
done:
p = btake(&b);
bfree(&b);
bfree(&path);
bfree(&bmore);
bfree(&branch);
vfree(&tags);
return p;
}
// install installs the library, package, or binary associated with dir,
// which is relative to $GOROOT/src.
static void
install(char *dir)
{
char *name, *p, *elem, *prefix, *exe;
bool islib, ispkg, isgo, stale;
Buf b, b1, path;
Vec compile, files, link, go, missing, clean, lib, extra;
Time ttarg, t;
int i, j, k, n, doclean, targ, usecpp;
if(vflag) {
if(!streq(goos, gohostos) || !streq(goarch, gohostarch))
errprintf("%s (%s/%s)\n", dir, goos, goarch);
else
errprintf("%s\n", dir);
}
binit(&b);
binit(&b1);
binit(&path);
vinit(&compile);
vinit(&files);
vinit(&link);
vinit(&go);
vinit(&missing);
vinit(&clean);
vinit(&lib);
vinit(&extra);
// path = full path to dir.
bpathf(&path, "%s/src/%s", goroot, dir);
name = lastelem(dir);
// For misc/prof, copy into the tool directory and we're done.
if(hasprefix(dir, "misc/")) {
copy(bpathf(&b, "%s/%s", tooldir, name),
bpathf(&b1, "%s/misc/%s", goroot, name), 1);
goto out;
}
// For release, cmd/prof and cmd/cov are not included.
if((streq(dir, "cmd/cov") || streq(dir, "cmd/prof")) && !isdir(bstr(&path))) {
if(vflag > 1)
errprintf("skipping %s - does not exist\n", dir);
goto out;
}
// set up gcc command line on first run.
if(gccargs.len == 0) {
xgetenv(&b, "CC");
if(b.len == 0)
bprintf(&b, "gcc");
splitfields(&gccargs, bstr(&b));
for(i=0; i<nelem(proto_gccargs); i++)
vadd(&gccargs, proto_gccargs[i]);
if(xstrstr(bstr(&b), "clang") != nil) {
vadd(&gccargs, "-Wno-dangling-else");
vadd(&gccargs, "-Wno-unused-value");
}
}
islib = hasprefix(dir, "lib") || streq(dir, "cmd/cc") || streq(dir, "cmd/gc");
ispkg = hasprefix(dir, "pkg");
isgo = ispkg || streq(dir, "cmd/go") || streq(dir, "cmd/cgo");
exe = "";
if(streq(gohostos, "windows"))
exe = ".exe";
// Start final link command line.
// Note: code below knows that link.p[targ] is the target.
if(islib) {
// C library.
vadd(&link, "ar");
if(streq(gohostos, "plan9"))
vadd(&link, "rc");
else
vadd(&link, "rsc");
prefix = "";
if(!hasprefix(name, "lib"))
prefix = "lib";
targ = link.len;
vadd(&link, bpathf(&b, "%s/pkg/obj/%s_%s/%s%s.a", goroot, gohostos, gohostarch, prefix, name));
} else if(ispkg) {
// Go library (package).
vadd(&link, bpathf(&b, "%s/pack", tooldir));
vadd(&link, "grc");
p = bprintf(&b, "%s/pkg/%s_%s/%s", goroot, goos, goarch, dir+4);
*xstrrchr(p, '/') = '\0';
xmkdirall(p);
targ = link.len;
vadd(&link, bpathf(&b, "%s/pkg/%s_%s/%s.a", goroot, goos, goarch, dir+4));
} else if(streq(dir, "cmd/go") || streq(dir, "cmd/cgo")) {
// Go command.
vadd(&link, bpathf(&b, "%s/%sl", tooldir, gochar));
vadd(&link, "-o");
elem = name;
if(streq(elem, "go"))
elem = "go_bootstrap";
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s%s", tooldir, elem, exe));
} else {
// C command. Use gccargs.
if(streq(gohostos, "plan9")) {
vadd(&link, bprintf(&b, "%sl", gohostchar));
vadd(&link, "-o");
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s", tooldir, name));
} else {
vcopy(&link, gccargs.p, gccargs.len);
vadd(&link, "-o");
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s%s", tooldir, name, exe));
if(streq(gohostarch, "amd64"))
vadd(&link, "-m64");
else if(streq(gohostarch, "386"))
vadd(&link, "-m32");
}
}
ttarg = mtime(link.p[targ]);
// Gather files that are sources for this target.
// Everything in that directory, and any target-specific
// additions.
xreaddir(&files, bstr(&path));
// Remove files beginning with . or _,
// which are likely to be editor temporary files.
// This is the same heuristic build.ScanDir uses.
// There do exist real C files beginning with _,
// so limit that check to just Go files.
n = 0;
for(i=0; i<files.len; i++) {
p = files.p[i];
if(hasprefix(p, ".") || (hasprefix(p, "_") && hassuffix(p, ".go")))
xfree(p);
else
files.p[n++] = p;
}
files.len = n;
for(i=0; i<nelem(deptab); i++) {
if(hasprefix(dir, deptab[i].prefix)) {
for(j=0; (p=deptab[i].dep[j])!=nil; j++) {
breset(&b1);
bwritestr(&b1, p);
bsubst(&b1, "$GOROOT", goroot);
bsubst(&b1, "$GOOS", goos);
bsubst(&b1, "$GOARCH", goarch);
p = bstr(&b1);
if(hassuffix(p, ".a")) {
if(streq(gohostos, "plan9") && hassuffix(p, "libbio.a"))
continue;
vadd(&lib, bpathf(&b, "%s", p));
continue;
}
if(hassuffix(p, "/*")) {
bpathf(&b, "%s/%s", bstr(&path), p);
b.len -= 2;
xreaddir(&extra, bstr(&b));
bprintf(&b, "%s", p);
b.len -= 2;
for(k=0; k<extra.len; k++)
vadd(&files, bpathf(&b1, "%s/%s", bstr(&b), extra.p[k]));
continue;
}
if(hasprefix(p, "-")) {
p++;
n = 0;
for(k=0; k<files.len; k++) {
if(hasprefix(files.p[k], p))
xfree(files.p[k]);
else
files.p[n++] = files.p[k];
}
files.len = n;
continue;
}
vadd(&files, p);
}
}
}
vuniq(&files);
// Convert to absolute paths.
for(i=0; i<files.len; i++) {
if(!isabs(files.p[i])) {
bpathf(&b, "%s/%s", bstr(&path), files.p[i]);
xfree(files.p[i]);
files.p[i] = btake(&b);
}
}
// Is the target up-to-date?
stale = rebuildall;
n = 0;
for(i=0; i<files.len; i++) {
p = files.p[i];
for(j=0; j<nelem(depsuffix); j++)
if(hassuffix(p, depsuffix[j]))
goto ok;
xfree(files.p[i]);
continue;
ok:
t = mtime(p);
if(t != 0 && !hassuffix(p, ".a") && !shouldbuild(p, dir)) {
xfree(files.p[i]);
continue;
}
if(hassuffix(p, ".go"))
vadd(&go, p);
if(t > ttarg)
stale = 1;
if(t == 0) {
vadd(&missing, p);
files.p[n++] = files.p[i];
continue;
}
files.p[n++] = files.p[i];
}
files.len = n;
// If there are no files to compile, we're done.
if(files.len == 0)
goto out;
for(i=0; i<lib.len && !stale; i++)
if(mtime(lib.p[i]) > ttarg)
stale = 1;
if(!stale)
goto out;
// For package runtime, copy some files into the work space.
if(streq(dir, "pkg/runtime")) {
copy(bpathf(&b, "%s/arch_GOARCH.h", workdir),
bpathf(&b1, "%s/arch_%s.h", bstr(&path), goarch), 0);
copy(bpathf(&b, "%s/defs_GOOS_GOARCH.h", workdir),
bpathf(&b1, "%s/defs_%s_%s.h", bstr(&path), goos, goarch), 0);
copy(bpathf(&b, "%s/os_GOOS.h", workdir),
bpathf(&b1, "%s/os_%s.h", bstr(&path), goos), 0);
copy(bpathf(&b, "%s/signals_GOOS.h", workdir),
bpathf(&b1, "%s/signals_%s.h", bstr(&path), goos), 0);
}
// Generate any missing files; regenerate existing ones.
for(i=0; i<files.len; i++) {
p = files.p[i];
elem = lastelem(p);
for(j=0; j<nelem(gentab); j++) {
if(hasprefix(elem, gentab[j].nameprefix)) {
if(vflag > 1)
errprintf("generate %s\n", p);
gentab[j].gen(bstr(&path), p);
// Do not add generated file to clean list.
// In pkg/runtime, we want to be able to
// build the package with the go tool,
// and it assumes these generated files already
// exist (it does not know how to build them).
// The 'clean' command can remove
// the generated files.
goto built;
}
}
// Did not rebuild p.
if(find(p, missing.p, missing.len) >= 0)
fatal("missing file %s", p);
built:;
}
// One more copy for package runtime.
// The last batch was required for the generators.
// This one is generated.
if(streq(dir, "pkg/runtime")) {
copy(bpathf(&b, "%s/zasm_GOOS_GOARCH.h", workdir),
bpathf(&b1, "%s/zasm_%s_%s.h", bstr(&path), goos, goarch), 0);
}
// Generate .c files from .goc files.
if(streq(dir, "pkg/runtime")) {
for(i=0; i<files.len; i++) {
p = files.p[i];
if(!hassuffix(p, ".goc"))
continue;
// b = path/zp but with _goos_goarch.c instead of .goc
bprintf(&b, "%s%sz%s", bstr(&path), slash, lastelem(p));
b.len -= 4;
bwritef(&b, "_%s_%s.c", goos, goarch);
goc2c(p, bstr(&b));
vadd(&files, bstr(&b));
}
vuniq(&files);
}
if((!streq(goos, gohostos) || !streq(goarch, gohostarch)) && isgo) {
// We've generated the right files; the go command can do the build.
if(vflag > 1)
errprintf("skip build for cross-compile %s\n", dir);
goto nobuild;
}
// The files generated by GNU Bison use macros that aren't
// supported by the Plan 9 compilers so we have to use the
// external preprocessor when compiling.
usecpp = 0;
if(streq(gohostos, "plan9")) {
for(i=0; i<files.len; i++) {
p = files.p[i];
if(hassuffix(p, "y.tab.c") || hassuffix(p, "y.tab.h")){
usecpp = 1;
break;
}
}
}
// Compile the files.
for(i=0; i<files.len; i++) {
if(!hassuffix(files.p[i], ".c") && !hassuffix(files.p[i], ".s"))
continue;
name = lastelem(files.p[i]);
vreset(&compile);
if(!isgo) {
// C library or tool.
if(streq(gohostos, "plan9")) {
vadd(&compile, bprintf(&b, "%sc", gohostchar));
vadd(&compile, "-FTVw");
if(usecpp)
vadd(&compile, "-Bp+");
vadd(&compile, bpathf(&b, "-I%s/include/plan9", goroot));
vadd(&compile, bpathf(&b, "-I%s/include/plan9/%s", goroot, gohostarch));
} else {
vcopy(&compile, gccargs.p, gccargs.len);
vadd(&compile, "-c");
if(streq(gohostarch, "amd64"))
vadd(&compile, "-m64");
else if(streq(gohostarch, "386"))
vadd(&compile, "-m32");
if(streq(dir, "lib9"))
vadd(&compile, "-DPLAN9PORT");
vadd(&compile, "-I");
vadd(&compile, bpathf(&b, "%s/include", goroot));
}
vadd(&compile, "-I");
vadd(&compile, bstr(&path));
// lib9/goos.c gets the default constants hard-coded.
if(streq(name, "goos.c")) {
vadd(&compile, bprintf(&b, "-DGOOS=\"%s\"", goos));
vadd(&compile, bprintf(&b, "-DGOARCH=\"%s\"", goarch));
bprintf(&b1, "%s", goroot_final);
bsubst(&b1, "\\", "\\\\"); // turn into C string
vadd(&compile, bprintf(&b, "-DGOROOT=\"%s\"", bstr(&b1)));
vadd(&compile, bprintf(&b, "-DGOVERSION=\"%s\"", goversion));
}
// gc/lex.c records the GOEXPERIMENT setting used during the build.
if(streq(name, "lex.c")) {
xgetenv(&b, "GOEXPERIMENT");
vadd(&compile, bprintf(&b1, "-DGOEXPERIMENT=\"%s\"", bstr(&b)));
}
} else {
// Supporting files for a Go package.
if(hassuffix(files.p[i], ".s"))
vadd(&compile, bpathf(&b, "%s/%sa", tooldir, gochar));
else {
vadd(&compile, bpathf(&b, "%s/%sc", tooldir, gochar));
vadd(&compile, "-FVw");
}
vadd(&compile, "-I");
vadd(&compile, workdir);
vadd(&compile, bprintf(&b, "-DGOOS_%s", goos));
vadd(&compile, bprintf(&b, "-DGOARCH_%s", goarch));
}
bpathf(&b, "%s/%s", workdir, lastelem(files.p[i]));
doclean = 1;
if(!isgo && streq(gohostos, "darwin")) {
// To debug C programs on OS X, it is not enough to say -ggdb
// on the command line. You have to leave the object files
// lying around too. Leave them in pkg/obj/, which does not
// get removed when this tool exits.
bpathf(&b1, "%s/pkg/obj/%s", goroot, dir);
xmkdirall(bstr(&b1));
bpathf(&b, "%s/%s", bstr(&b1), lastelem(files.p[i]));
doclean = 0;
}
// Change the last character of the output file (which was c or s).
if(streq(gohostos, "plan9"))
b.p[b.len-1] = gohostchar[0];
else
b.p[b.len-1] = 'o';
vadd(&compile, "-o");
vadd(&compile, bstr(&b));
vadd(&compile, files.p[i]);
bgrunv(bstr(&path), CheckExit, &compile);
vadd(&link, bstr(&b));
if(doclean)
vadd(&clean, bstr(&b));
}
bgwait();
if(isgo) {
// The last loop was compiling individual files.
// Hand the Go files to the compiler en masse.
vreset(&compile);
vadd(&compile, bpathf(&b, "%s/%sg", tooldir, gochar));
bpathf(&b, "%s/_go_.%s", workdir, gochar);
vadd(&compile, "-o");
vadd(&compile, bstr(&b));
vadd(&clean, bstr(&b));
vadd(&link, bstr(&b));
vadd(&compile, "-p");
if(hasprefix(dir, "pkg/"))
vadd(&compile, dir+4);
else
vadd(&compile, "main");
if(streq(dir, "pkg/runtime"))
vadd(&compile, "-+");
vcopy(&compile, go.p, go.len);
runv(nil, bstr(&path), CheckExit, &compile);
}
if(!islib && !isgo) {
// C binaries need the libraries explicitly, and -lm.
vcopy(&link, lib.p, lib.len);
if(!streq(gohostos, "plan9"))
vadd(&link, "-lm");
}
// Remove target before writing it.
xremove(link.p[targ]);
runv(nil, nil, CheckExit, &link);
nobuild:
// In package runtime, we install runtime.h and cgocall.h too,
// for use by cgo compilation.
if(streq(dir, "pkg/runtime")) {
copy(bpathf(&b, "%s/pkg/%s_%s/cgocall.h", goroot, goos, goarch),
bpathf(&b1, "%s/src/pkg/runtime/cgocall.h", goroot), 0);
copy(bpathf(&b, "%s/pkg/%s_%s/runtime.h", goroot, goos, goarch),
bpathf(&b1, "%s/src/pkg/runtime/runtime.h", goroot), 0);
}
out:
for(i=0; i<clean.len; i++)
xremove(clean.p[i]);
bfree(&b);
bfree(&b1);
bfree(&path);
vfree(&compile);
vfree(&files);
vfree(&link);
vfree(&go);
vfree(&missing);
vfree(&clean);
vfree(&lib);
vfree(&extra);
}
// genrun is the generic run implementation.
static void
genrun(Buf *b, char *dir, int mode, Vec *argv, int wait)
{
int i, p[2], pid;
Buf b1, cmd;
char *q;
while(nbg >= maxnbg)
bgwait1();
binit(&b1);
binit(&cmd);
if(!isabs(argv->p[0])) {
bpathf(&b1, "/bin/%s", argv->p[0]);
free(argv->p[0]);
argv->p[0] = xstrdup(bstr(&b1));
}
// Generate a copy of the command to show in a log.
// Substitute $WORK for the work directory.
for(i=0; i<argv->len; i++) {
if(i > 0)
bwritestr(&cmd, " ");
q = argv->p[i];
if(workdir != nil && hasprefix(q, workdir)) {
bwritestr(&cmd, "$WORK");
q += strlen(workdir);
}
bwritestr(&cmd, q);
}
if(vflag > 1)
errprintf("%s\n", bstr(&cmd));
if(b != nil) {
breset(b);
if(pipe(p) < 0)
fatal("pipe");
}
switch(pid = fork()) {
case -1:
fatal("fork");
case 0:
if(b != nil) {
close(0);
close(p[0]);
dup(p[1], 1);
dup(p[1], 2);
if(p[1] > 2)
close(p[1]);
}
if(dir != nil) {
if(chdir(dir) < 0) {
fprint(2, "chdir: %r\n");
_exits("chdir");
}
}
vadd(argv, nil);
exec(argv->p[0], argv->p);
fprint(2, "%s\n", bstr(&cmd));
fprint(2, "exec: %r\n");
_exits("exec");
}
if(b != nil) {
close(p[1]);
breadfrom(b, p[0]);
close(p[0]);
}
if(nbg < 0)
fatal("bad bookkeeping");
bg[nbg].pid = pid;
bg[nbg].mode = mode;
bg[nbg].cmd = btake(&cmd);
bg[nbg].b = b;
nbg++;
if(wait)
bgwait();
bfree(&cmd);
bfree(&b1);
}
// genrun is the generic run implementation.
static void
genrun(Buf *b, char *dir, int mode, Vec *argv, int wait)
{
int i, p[2], pid;
Buf cmd;
char *q;
while(nbg >= maxnbg)
bgwait1();
// Generate a copy of the command to show in a log.
// Substitute $WORK for the work directory.
binit(&cmd);
for(i=0; i<argv->len; i++) {
if(i > 0)
bwritestr(&cmd, " ");
q = argv->p[i];
if(workdir != nil && hasprefix(q, workdir)) {
bwritestr(&cmd, "$WORK");
q += strlen(workdir);
}
bwritestr(&cmd, q);
}
//if(vflag > 1)
xprintf("%s\n", bstr(&cmd));
if(b != nil) {
breset(b);
if(pipe(p) < 0)
fatal("pipe: %s", strerror(errno));
}
switch(pid = fork()) {
case -1:
fatal("fork: %s", strerror(errno));
case 0:
if(b != nil) {
close(0);
close(p[0]);
dup2(p[1], 1);
dup2(p[1], 2);
if(p[1] > 2)
close(p[1]);
}
if(dir != nil) {
if(chdir(dir) < 0) {
fprintf(stderr, "chdir %s: %s\n", dir, strerror(errno));
_exit(1);
}
}
vadd(argv, nil);
execvp(argv->p[0], argv->p);
fprintf(stderr, "%s\n", bstr(&cmd));
fprintf(stderr, "exec %s: %s\n", argv->p[0], strerror(errno));
_exit(1);
}
if(b != nil) {
close(p[1]);
breadfrom(b, p[0]);
close(p[0]);
}
if(nbg < 0)
fatal("bad bookkeeping");
bg[nbg].pid = pid;
bg[nbg].mode = mode;
bg[nbg].cmd = btake(&cmd);
bg[nbg].b = b;
nbg++;
if(wait)
bgwait();
bfree(&cmd);
}
// init handles initialization of the various global state, like goroot and goarch.
void
init(void)
{
char *p;
int i;
Buf b;
binit(&b);
xgetenv(&b, "GOROOT");
if(b.len > 0) {
// if not "/", then strip trailing path separator
if(b.len >= 2 && b.p[b.len - 1] == slash[0])
b.len--;
goroot = btake(&b);
}
xgetenv(&b, "GOBIN");
if(b.len == 0)
bprintf(&b, "%s%sbin", goroot, slash);
gobin = btake(&b);
xgetenv(&b, "GOOS");
if(b.len == 0)
bwritestr(&b, gohostos);
goos = btake(&b);
if(find(goos, okgoos, nelem(okgoos)) < 0)
fatal("unknown $GOOS %s", goos);
xgetenv(&b, "GOARM");
if(b.len == 0)
bwritestr(&b, xgetgoarm());
goarm = btake(&b);
xgetenv(&b, "GO386");
if(b.len == 0) {
if(cansse2())
bwritestr(&b, "sse2");
else
bwritestr(&b, "387");
}
go386 = btake(&b);
p = bpathf(&b, "%s/include/u.h", goroot);
if(!isfile(p)) {
fatal("$GOROOT is not set correctly or not exported\n"
"\tGOROOT=%s\n"
"\t%s does not exist", goroot, p);
}
xgetenv(&b, "GOHOSTARCH");
if(b.len > 0)
gohostarch = btake(&b);
i = find(gohostarch, okgoarch, nelem(okgoarch));
if(i < 0)
fatal("unknown $GOHOSTARCH %s", gohostarch);
bprintf(&b, "%c", gochars[i]);
gohostchar = btake(&b);
xgetenv(&b, "GOARCH");
if(b.len == 0)
bwritestr(&b, gohostarch);
goarch = btake(&b);
i = find(goarch, okgoarch, nelem(okgoarch));
if(i < 0)
fatal("unknown $GOARCH %s", goarch);
bprintf(&b, "%c", gochars[i]);
gochar = btake(&b);
xgetenv(&b, "GO_EXTLINK_ENABLED");
if(b.len > 0) {
goextlinkenabled = btake(&b);
if(!streq(goextlinkenabled, "0") && !streq(goextlinkenabled, "1"))
fatal("unknown $GO_EXTLINK_ENABLED %s", goextlinkenabled);
}
xgetenv(&b, "CC");
if(b.len == 0) {
// Use clang on OS X, because gcc is deprecated there.
// Xcode for OS X 10.9 Mavericks will ship a fake "gcc" binary that
// actually runs clang. We prepare different command
// lines for the two binaries, so it matters what we call it.
// See golang.org/issue/5822.
if(defaultclang)
bprintf(&b, "clang");
else
bprintf(&b, "gcc");
}
defaultcc = btake(&b);
xgetenv(&b, "CXX");
if(b.len == 0) {
if(defaultclang)
bprintf(&b, "clang++");
else
bprintf(&b, "g++");
}
defaultcxx = btake(&b);
xsetenv("GOROOT", goroot);
xsetenv("GOARCH", goarch);
xsetenv("GOOS", goos);
xsetenv("GOARM", goarm);
xsetenv("GO386", go386);
// Make the environment more predictable.
xsetenv("LANG", "C");
xsetenv("LANGUAGE", "en_US.UTF8");
goversion = findgoversion();
workdir = xworkdir();
xatexit(rmworkdir);
bpathf(&b, "%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch);
tooldir = btake(&b);
bfree(&b);
}
// init handles initialization of the various global state, like goroot and goarch.
void
init(void)
{
char *p;
int i;
Buf b;
binit(&b);
xgetenv(&b, "GOROOT");
if(b.len > 0) {
// if not "/", then strip trailing path separator
if(b.len >= 2 && b.p[b.len - 1] == slash[0])
b.len--;
goroot = btake(&b);
}
xgetenv(&b, "GOBIN");
if(b.len == 0)
bprintf(&b, "%s%sbin", goroot, slash);
gobin = btake(&b);
xgetenv(&b, "GOOS");
if(b.len == 0)
bwritestr(&b, gohostos);
goos = btake(&b);
if(find(goos, okgoos, nelem(okgoos)) < 0)
fatal("unknown $GOOS %s", goos);
p = bpathf(&b, "%s/include/u.h", goroot);
if(!isfile(p)) {
fatal("$GOROOT is not set correctly or not exported\n"
"\tGOROOT=%s\n"
"\t%s does not exist", goroot, p);
}
xgetenv(&b, "GOHOSTARCH");
if(b.len > 0)
gohostarch = btake(&b);
i = find(gohostarch, okgoarch, nelem(okgoarch));
if(i < 0)
fatal("unknown $GOHOSTARCH %s", gohostarch);
bprintf(&b, "%c", gochars[i]);
gohostchar = btake(&b);
xgetenv(&b, "GOARCH");
if(b.len == 0)
bwritestr(&b, gohostarch);
goarch = btake(&b);
i = find(goarch, okgoarch, nelem(okgoarch));
if(i < 0)
fatal("unknown $GOARCH %s", goarch);
bprintf(&b, "%c", gochars[i]);
gochar = btake(&b);
xsetenv("GOROOT", goroot);
xsetenv("GOARCH", goarch);
xsetenv("GOOS", goos);
// Make the environment more predictable.
xsetenv("LANG", "C");
xsetenv("LANGUAGE", "en_US.UTF8");
goversion = findgoversion();
workdir = xworkdir();
xatexit(rmworkdir);
bpathf(&b, "%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch);
tooldir = btake(&b);
bfree(&b);
}
// install installs the library, package, or binary associated with dir,
// which is relative to $GOROOT/src.
static void
install(char *dir)
{
char *name, *p, *elem, *prefix, *exe;
bool islib, ispkg, isgo, stale, ispackcmd;
Buf b, b1, path, final_path, final_name, archive;
Vec compile, files, link, go, missing, clean, lib, extra;
Time ttarg, t;
int i, j, k, n, doclean, targ;
if(vflag) {
if(!streq(goos, gohostos) || !streq(goarch, gohostarch))
errprintf("%s (%s/%s)\n", dir, goos, goarch);
else
errprintf("%s\n", dir);
}
binit(&b);
binit(&b1);
binit(&path);
binit(&final_path);
binit(&final_name);
binit(&archive);
vinit(&compile);
vinit(&files);
vinit(&link);
vinit(&go);
vinit(&missing);
vinit(&clean);
vinit(&lib);
vinit(&extra);
// path = full path to dir.
bpathf(&path, "%s/src/%s", goroot, dir);
bpathf(&final_path, "%s/src/%s", goroot_final, dir);
name = lastelem(dir);
// set up gcc command line on first run.
if(gccargs.len == 0) {
bprintf(&b, "%s %s", defaultcc, defaultcflags);
splitfields(&gccargs, bstr(&b));
for(i=0; i<nelem(proto_gccargs); i++)
vadd(&gccargs, proto_gccargs[i]);
if(defaultcflags[0] == '\0') {
for(i=0; i<nelem(proto_gccargs2); i++)
vadd(&gccargs, proto_gccargs2[i]);
}
if(contains(gccargs.p[0], "clang")) {
// disable ASCII art in clang errors, if possible
vadd(&gccargs, "-fno-caret-diagnostics");
// clang is too smart about unused command-line arguments
vadd(&gccargs, "-Qunused-arguments");
}
// disable word wrapping in error messages
vadd(&gccargs, "-fmessage-length=0");
if(streq(gohostos, "darwin")) {
// golang.org/issue/5261
vadd(&gccargs, "-mmacosx-version-min=10.6");
}
}
if(ldargs.len == 0 && defaultldflags[0] != '\0') {
bprintf(&b, "%s", defaultldflags);
splitfields(&ldargs, bstr(&b));
}
islib = hasprefix(dir, "lib") || streq(dir, "cmd/gc");
ispkg = !islib && !hasprefix(dir, "cmd/");
isgo = ispkg || streq(dir, "cmd/go") || streq(dir, "cmd/cgo");
exe = "";
if(streq(gohostos, "windows"))
exe = ".exe";
// Start final link command line.
// Note: code below knows that link.p[targ] is the target.
ispackcmd = 0;
if(islib) {
// C library.
vadd(&link, "ar");
if(streq(gohostos, "plan9"))
vadd(&link, "rc");
else
vadd(&link, "rsc");
prefix = "";
if(!hasprefix(name, "lib"))
prefix = "lib";
targ = link.len;
vadd(&link, bpathf(&b, "%s/pkg/obj/%s_%s/%s%s.a", goroot, gohostos, gohostarch, prefix, name));
} else if(ispkg) {
// Go library (package).
ispackcmd = 1;
vadd(&link, "pack"); // program name - unused here, but all the other cases record one
p = bprintf(&b, "%s/pkg/%s_%s/%s", goroot, goos, goarch, dir);
*xstrrchr(p, '/') = '\0';
xmkdirall(p);
targ = link.len;
vadd(&link, bpathf(&b, "%s/pkg/%s_%s/%s.a", goroot, goos, goarch, dir));
} else if(streq(dir, "cmd/go") || streq(dir, "cmd/cgo")) {
// Go command.
vadd(&link, bpathf(&b, "%s/%sl", tooldir, gochar));
vadd(&link, "-o");
elem = name;
if(streq(elem, "go"))
elem = "go_bootstrap";
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s%s", tooldir, elem, exe));
} else {
// C command. Use gccargs and ldargs.
if(streq(gohostos, "plan9")) {
vadd(&link, bprintf(&b, "%sl", gohostchar));
vadd(&link, "-o");
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s", tooldir, name));
} else {
vcopy(&link, gccargs.p, gccargs.len);
vcopy(&link, ldargs.p, ldargs.len);
if(sflag)
vadd(&link, "-static");
vadd(&link, "-o");
targ = link.len;
vadd(&link, bpathf(&b, "%s/%s%s", tooldir, name, exe));
if(streq(gohostarch, "amd64"))
vadd(&link, "-m64");
else if(streq(gohostarch, "386"))
vadd(&link, "-m32");
}
}
ttarg = mtime(link.p[targ]);
// Gather files that are sources for this target.
// Everything in that directory, and any target-specific
// additions.
xreaddir(&files, bstr(&path));
// Remove files beginning with . or _,
// which are likely to be editor temporary files.
// This is the same heuristic build.ScanDir uses.
// There do exist real C files beginning with _,
// so limit that check to just Go files.
n = 0;
for(i=0; i<files.len; i++) {
p = files.p[i];
if(hasprefix(p, ".") || (hasprefix(p, "_") && hassuffix(p, ".go")))
xfree(p);
else
files.p[n++] = p;
}
files.len = n;
for(i=0; i<nelem(deptab); i++) {
if(streq(dir, deptab[i].prefix) ||
(hassuffix(deptab[i].prefix, "/") && hasprefix(dir, deptab[i].prefix))) {
for(j=0; (p=deptab[i].dep[j])!=nil; j++) {
breset(&b1);
bwritestr(&b1, p);
bsubst(&b1, "$GOROOT", goroot);
bsubst(&b1, "$GOOS", goos);
bsubst(&b1, "$GOARCH", goarch);
bsubst(&b1, "$GOHOSTOS", gohostos);
bsubst(&b1, "$GOHOSTARCH", gohostarch);
p = bstr(&b1);
if(hassuffix(p, ".a")) {
vadd(&lib, bpathf(&b, "%s", p));
continue;
}
if(hassuffix(p, "/*")) {
bpathf(&b, "%s/%s", bstr(&path), p);
b.len -= 2;
xreaddir(&extra, bstr(&b));
bprintf(&b, "%s", p);
b.len -= 2;
for(k=0; k<extra.len; k++)
vadd(&files, bpathf(&b1, "%s/%s", bstr(&b), extra.p[k]));
continue;
}
if(hasprefix(p, "-")) {
p++;
n = 0;
for(k=0; k<files.len; k++) {
if(hasprefix(files.p[k], p))
xfree(files.p[k]);
else
files.p[n++] = files.p[k];
}
files.len = n;
continue;
}
vadd(&files, p);
}
}
}
vuniq(&files);
// Convert to absolute paths.
for(i=0; i<files.len; i++) {
if(!isabs(files.p[i])) {
bpathf(&b, "%s/%s", bstr(&path), files.p[i]);
xfree(files.p[i]);
files.p[i] = btake(&b);
}
}
// Is the target up-to-date?
stale = rebuildall;
n = 0;
for(i=0; i<files.len; i++) {
p = files.p[i];
for(j=0; j<nelem(depsuffix); j++)
if(hassuffix(p, depsuffix[j]))
goto ok;
xfree(files.p[i]);
continue;
ok:
t = mtime(p);
if(t != 0 && !hassuffix(p, ".a") && !shouldbuild(p, dir)) {
xfree(files.p[i]);
continue;
}
if(hassuffix(p, ".go"))
vadd(&go, p);
if(t > ttarg)
stale = 1;
if(t == 0) {
vadd(&missing, p);
files.p[n++] = files.p[i];
continue;
}
files.p[n++] = files.p[i];
}
files.len = n;
// If there are no files to compile, we're done.
if(files.len == 0)
goto out;
for(i=0; i<lib.len && !stale; i++)
if(mtime(lib.p[i]) > ttarg)
stale = 1;
if(!stale)
goto out;
// For package runtime, copy some files into the work space.
if(streq(dir, "runtime")) {
copyfile(bpathf(&b, "%s/pkg/%s_%s/textflag.h", goroot, goos, goarch),
bpathf(&b1, "%s/src/cmd/ld/textflag.h", goroot), 0);
copyfile(bpathf(&b, "%s/pkg/%s_%s/funcdata.h", goroot, goos, goarch),
bpathf(&b1, "%s/src/runtime/funcdata.h", goroot), 0);
}
// Generate any missing files; regenerate existing ones.
for(i=0; i<files.len; i++) {
p = files.p[i];
elem = lastelem(p);
for(j=0; j<nelem(gentab); j++) {
if(gentab[j].gen == nil)
continue;
if(hasprefix(elem, gentab[j].nameprefix)) {
if(vflag > 1)
errprintf("generate %s\n", p);
gentab[j].gen(bstr(&path), p);
// Do not add generated file to clean list.
// In runtime, we want to be able to
// build the package with the go tool,
// and it assumes these generated files already
// exist (it does not know how to build them).
// The 'clean' command can remove
// the generated files.
goto built;
}
}
// Did not rebuild p.
if(find(p, missing.p, missing.len) >= 0)
fatal("missing file %s", p);
built:;
}
if((!streq(goos, gohostos) || !streq(goarch, gohostarch)) && isgo) {
// We've generated the right files; the go command can do the build.
if(vflag > 1)
errprintf("skip build for cross-compile %s\n", dir);
goto nobuild;
}
if(isgo) {
// The next loop will compile individual non-Go files.
// Hand the Go files to the compiler en masse.
// For package runtime, this writes go_asm.h, which
// the assembly files will need.
vreset(&compile);
vadd(&compile, bpathf(&b, "%s/%sg", tooldir, gochar));
bpathf(&b, "%s/_go_.a", workdir);
vadd(&compile, "-pack");
vadd(&compile, "-o");
vadd(&compile, bstr(&b));
vadd(&clean, bstr(&b));
if(!ispackcmd)
vadd(&link, bstr(&b));
else
bwriteb(&archive, &b);
vadd(&compile, "-p");
if(hasprefix(dir, "cmd/"))
vadd(&compile, "main");
else
vadd(&compile, dir);
if(streq(dir, "runtime")) {
vadd(&compile, "-+");
vadd(&compile, "-asmhdr");
bpathf(&b1, "%s/go_asm.h", workdir);
vadd(&compile, bstr(&b1));
}
vcopy(&compile, go.p, go.len);
runv(nil, bstr(&path), CheckExit, &compile);
}
// Compile the files.
for(i=0; i<files.len; i++) {
if(!hassuffix(files.p[i], ".c") && !hassuffix(files.p[i], ".s"))
continue;
name = lastelem(files.p[i]);
vreset(&compile);
if(!isgo) {
// C library or tool.
if(streq(gohostos, "plan9")) {
vadd(&compile, bprintf(&b, "%sc", gohostchar));
vadd(&compile, "-FTVwp");
vadd(&compile, "-DPLAN9");
vadd(&compile, "-D__STDC__=1");
vadd(&compile, "-D__SIZE_TYPE__=ulong"); // for GNU Bison
vadd(&compile, bpathf(&b, "-I%s/include/plan9", goroot));
vadd(&compile, bpathf(&b, "-I%s/include/plan9/%s", goroot, gohostarch));
} else {
vcopy(&compile, gccargs.p, gccargs.len);
vadd(&compile, "-c");
if(streq(gohostarch, "amd64"))
vadd(&compile, "-m64");
else if(streq(gohostarch, "386"))
vadd(&compile, "-m32");
vadd(&compile, "-I");
vadd(&compile, bpathf(&b, "%s/include", goroot));
}
if(streq(dir, "lib9"))
vadd(&compile, "-DPLAN9PORT");
vadd(&compile, "-I");
vadd(&compile, bstr(&path));
// lib9/goos.c gets the default constants hard-coded.
if(streq(name, "goos.c")) {
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOOS=\"%s\"", goos));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOARCH=\"%s\"", goarch));
bprintf(&b1, "%s", goroot_final);
bsubst(&b1, "\\", "\\\\"); // turn into C string
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOROOT=\"%s\"", bstr(&b1)));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOVERSION=\"%s\"", goversion));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOARM=\"%s\"", goarm));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GO386=\"%s\"", go386));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GO_EXTLINK_ENABLED=\"%s\"", goextlinkenabled));
}
// gc/lex.c records the GOEXPERIMENT setting used during the build.
if(streq(name, "lex.c")) {
xgetenv(&b, "GOEXPERIMENT");
vadd(&compile, "-D");
vadd(&compile, bprintf(&b1, "GOEXPERIMENT=\"%s\"", bstr(&b)));
}
} else {
// Supporting files for a Go package.
if(hassuffix(files.p[i], ".s"))
vadd(&compile, bpathf(&b, "%s/%sa", tooldir, gochar));
else {
vadd(&compile, bpathf(&b, "%s/%sc", tooldir, gochar));
vadd(&compile, "-F");
vadd(&compile, "-V");
vadd(&compile, "-w");
}
vadd(&compile, "-I");
vadd(&compile, workdir);
vadd(&compile, "-I");
vadd(&compile, bprintf(&b, "%s/pkg/%s_%s", goroot, goos, goarch));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOOS_%s", goos));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOARCH_%s", goarch));
vadd(&compile, "-D");
vadd(&compile, bprintf(&b, "GOOS_GOARCH_%s_%s", goos, goarch));
}
bpathf(&b, "%s/%s", workdir, lastelem(files.p[i]));
doclean = 1;
if(!isgo && streq(gohostos, "darwin")) {
// To debug C programs on OS X, it is not enough to say -ggdb
// on the command line. You have to leave the object files
// lying around too. Leave them in pkg/obj/, which does not
// get removed when this tool exits.
bpathf(&b1, "%s/pkg/obj/%s", goroot, dir);
xmkdirall(bstr(&b1));
bpathf(&b, "%s/%s", bstr(&b1), lastelem(files.p[i]));
doclean = 0;
}
// Change the last character of the output file (which was c or s).
if(streq(gohostos, "plan9"))
b.p[b.len-1] = gohostchar[0];
else
b.p[b.len-1] = 'o';
vadd(&compile, "-o");
vadd(&compile, bstr(&b));
vadd(&compile, files.p[i]);
bgrunv(bstr(&path), CheckExit, &compile);
vadd(&link, bstr(&b));
if(doclean)
vadd(&clean, bstr(&b));
}
bgwait();
if(isgo && ispackcmd) {
xremove(link.p[targ]);
dopack(link.p[targ], bstr(&archive), &link.p[targ+1], link.len - (targ+1));
goto nobuild;
}
if(!islib && !isgo) {
// C binaries need the libraries explicitly, and -lm.
vcopy(&link, lib.p, lib.len);
if(!streq(gohostos, "plan9"))
vadd(&link, "-lm");
}
// Remove target before writing it.
xremove(link.p[targ]);
runv(nil, nil, CheckExit, &link);
nobuild:
out:
for(i=0; i<clean.len; i++)
xremove(clean.p[i]);
bfree(&b);
bfree(&b1);
bfree(&path);
bfree(&archive);
vfree(&compile);
vfree(&files);
vfree(&link);
vfree(&go);
vfree(&missing);
vfree(&clean);
vfree(&lib);
vfree(&extra);
}