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gopack: allow ELF/Mach-O objects in .a files without clearing allobj

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R=iant
CC=golang-dev
https://golang.org/cl/3503041
This commit is contained in:
Russ Cox 2010-12-08 13:53:13 -05:00
parent 8132f1d016
commit f16c280fe5
1 changed files with 14 additions and 0 deletions
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14
src/cmd/gopack/ar.c
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@ -593,12 +593,26 @@ scanobj(Biobuf *b, Arfile *ap, long size)
vlong offset;
Dir *d;
static int lastobj = -1;
uchar buf[4];
if (!allobj) /* non-object file encountered */
return;
offset = Boffset(b);
obj = objtype(b, 0);
if (obj < 0) { /* not an object file */
/* maybe a foreign object file */
Bseek(b, offset, 0);
memset(buf, 0, sizeof buf);
Bread(b, buf, 4);
/* maybe a foreign object file? that's okay */
if((buf[0] == 0x7F && buf[1] == 'E' && buf[2] == 'L' && buf[3] == 'F') || // ELF
(buf[0] == 0xFE && buf[1] == 0xED && buf[2] == 0xFA && (buf[3]&~1) == 0xCE) || // Mach-O big-endian
(buf[3] == 0xFE && buf[2] == 0xED && buf[1] == 0xFA && (buf[0]&~1) == 0xCE)) { // Mach-O little-endian
Bseek(b, offset, 0);
return;
}
if (!gflag || strcmp(file, pkgdef) != 0) { /* don't clear allobj if it's pkg defs */
fprint(2, "gopack: non-object file %s\n", file);
errors++;