使用apt-cache search搜索想要的软件包

使用apt-cache search搜索想要的软件包

环境： Ubuntu14.10

我在编译u-boot代码遇到以下问题：

  LD      test/dm/built-in.o   CC      examples/standalone/stubs.o   LD      examples/standalone/libstubs.o   CC      examples/standalone/hello_world.o   LD      examples/standalone/hello_world   OBJCOPY examples/standalone/hello_world.srec   OBJCOPY examples/standalone/hello_world.bin   LDS     u-boot.lds   LD      u-boot   OBJCOPY u-boot.srec   OBJCOPY u-boot.bin   CFG     u-boot.cfg ./scripts/dtc-version.sh: line 17: dtc: command not found ./scripts/dtc-version.sh: line 18: dtc: command not found *** Your dtc is too old, please upgrade to dtc 1.4 or newer Makefile:1298: recipe for target 'checkdtc' failed make: *** [checkdtc] Error 1 

从提示信息可以看到是因为u-boot设备树配置，但编译设备树时找不到工具dtc。

如果我想通过的话apt-get install 来安装dtc该安装软件包了？如果你直接写dtc，会出现以下错误：

pengdl@pengdl-HP:~/work/study/qemu_study/u-boot/u-boot$ sudo apt-get install dtc Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package dtc 

显然不叫dtc的软件包。

解决办法：

使用apt-cache search搜索包含命令和搜索dtc软件包的名称：

pengdl@pengdl-HP:~/work/study/qemu_study/u-boot/u-boot$ sudo apt-cache search dtc [sudo] password for pengdl:  device-tree-compiler - Device Tree Compiler for Flat Device Trees ddtc - Deal with ddts mails dtc-xen - SOAP daemon and scripts to allow control panel management for Xen VMs dtc-xen-firewall - small firewall script for your dom0 sbox-dtc - CGI chroot wrapper script for safer hosting environment 

可见，第一个 device-tree-compiler 我们要找的是最合适的。
下面安装这个软件包：

pengdl@pengdl-HP:~/work/study/qemu_study/u-boot/u-boot$ sudo apt-get install device-tree-compiler  Reading package lists... Done Building dependency tree        Reading state information... Done The following NEW packages will be installed:   device-tree-compiler 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded. Need to get 356 kB of archives. After this operation, 546 kB of additional disk space will be used. Get:1 http://mirrors.namecheap.com/ubuntu/ utopic/main device-tree-compiler amd64 1.4.0 dfsg-1 [356 kB] Fetched 356 kB in 12s (27.7 kB/s)                                                                                                                                                     Selecting previously unselected package device-tree-compiler. (Reading database ... 305587 files and directories currently installed.) Preparing to unpack .../device-tree-compiler_1.4.0 dfsg-1_amd64.deb ... Unpacking device-tree-compiler (1.4.0 dfsg-1) ... Processing triggers for man-db (2.7.0.2-2) ... Processing triggers for doc-base (0.10.6) ...
Processing 2 added doc-base files...
Registering documents with scrollkeeper...

安装完后，就可以找到dtc这个工具了：

pengdl@pengdl-HP:~/work/study/qemu_study/u-boot/u-boot$ which dtc
/usr/bin/dtc

再次编译u-boot：

  LD      common/built-in.o
  CC      drivers/usb/gadget/f_thor.o
  LD      drivers/usb/gadget/built-in.o
  CC      lib/display_options.o
  LD      lib/built-in.o
  LD      u-boot
  OBJCOPY u-boot.srec
  OBJCOPY u-boot.bin
  DTC     arch/arm/dts/exynos4210-origen.dtb
  DTC     arch/arm/dts/exynos4210-smdkv310.dtb
  DTC     arch/arm/dts/exynos4210-universal_c210.dtb
  DTC     arch/arm/dts/exynos4210-trats.dtb
  DTC     arch/arm/dts/exynos4412-trats2.dtb
  DTC     arch/arm/dts/exynos4412-odroid.dtb
  DTC     arch/arm/dts/exynos4412-tiny4412.dtb
  SHIPPED dts/dt.dtb
  COPY    u-boot.dtb
  CAT     u-boot-dtb.bin
===================== WARNING ======================
This board uses CONFIG_DM_I2C_COMPAT. Please remove
(possibly in a subsequent patch in your series)
before sending patches to the mailing list.
====================================================

可以看到编译通过。