OpenWrt中的FEATURES:=broken jffs2

target/linux/goldfish中有：

FEATURES:=broken

（這個參數在make menuconfig 中 [*] Advanced configuration options (for developers) --->[ *] Show broken platforms / packages）

或者其他的如：

FEATURES:=jffs2 squashfs

scripts/metadata.pl中有 關於FEATURES的定義：

1 利用這個perl腳本可以把下面的如jffs2，broken這些轉化為BROKEN，USES_JFFS2這些實際的CONFIG_參數。

2 同時注意區別depends BROKEN 和 select USES_JFFS2，這也就是為什麼FEATURES:=broken的效果和FEATURES:=jffs2不一樣的原因！

1. sub target_config_features(@) {
2. my $ret;
4. while ($_ = shift @_) {
5. /broken/ and $ret .= "\tdepends BROKEN\n";
6. /audio/ and $ret .= "\tselect AUDIO_SUPPORT\n";
7. /display/ and $ret .= "\tselect DISPLAY_SUPPORT\n";
8. /gpio/ and $ret .= "\tselect GPIO_SUPPORT\n";
9. /pci/ and $ret .= "\tselect PCI_SUPPORT\n";
10. /pcie/ and $ret .= "\tselect PCIE_SUPPORT\n";
11. /usb/ and $ret .= "\tselect USB_SUPPORT\n";
12. /pcmcia/ and $ret .= "\tselect PCMCIA_SUPPORT\n";
13. /squashfs/ and $ret .= "\tselect USES_SQUASHFS\n";
14. /jffs2/ and $ret .= "\tselect USES_JFFS2\n";
15. /ext2/ and $ret .= "\tselect USES_EXT2\n";
16. /targz/ and $ret .= "\tselect USES_TARGZ\n";
17. /cpiogz/ and $ret .= "\tselect USES_CPIOGZ\n";
18. /ubifs/ and $ret .= "\tselect USES_UBIFS\n";
19. /fpu/ and $ret .= "\tselect HAS_FPU\n";
20. /ramdisk/ and $ret .= "\tselect USES_INITRAMFS\n";
21. /powerpc64/ and $ret .= "\tselect powerpc64\n";
22. /nommu/ and $ret .= "\tselect NOMMU\n";
23. }
24. return $ret;
25. }