[已解决]如何unmask被profile mask的包？

erlv

!!! All ebuilds that could satisfy "=sys-devel/binutils-2.16.1-r3" have been masked.
!!! One of the following masked packages is required to complete your request:
- sys-devel/binutils-2.16.1-r3 (masked by: profile)

我想安装 protage中最老版本的binutils
sys-devel/binutils
     Available versions:  [P]2.16.1-r3 [P]*2.16.91.0.6 2.18-r3 ~2.18-r4 ~2.19.1-r1 **2.19.51.0.13 **2.19.51.0.14 ~2.20 ~2.20[1] **2.20.51.0.1 **2.20.51.0.2 **2.20.51.0.3 **2.20.51.0.4 **2.20.51.0.5 **9999[1] {multislot multitarget nls test vanilla}

谢谢

在/usr/portage/profiles/中找到自己机器和release版本对应的profile，修改相应mask即可，这些profile中仅对工具链中的包要求了版本，我的如下：
$cat /usr/portage/profiles/releases/10.0/packages

>=sys-apps/baselayout-1.12.10-r5
>=sys-devel/binutils-2.18-r1
>=sys-libs/glibc-2.4-r4
>=sys-apps/portage-2.1.6.8