sid@flashpoint:~/Desktop/cp-fw$ sudo apt-cache showpkg gcc-avr
Package: gcc-avr
Versions:
1:4.5.3-3 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages) (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages
                  MD5: 747859ccf40ae64bdd980d06c0896d57
 Description Language: en
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Translation-en
                  MD5: 747859ccf40ae64bdd980d06c0896d57


Reverse Depends:
  arduino-core,gcc-avr
  gcc-avr:i386,gcc-avr
  simulavr,gcc-avr
  science-electronics,gcc-avr
  expeyes-firmware-dev,gcc-avr
  avr-libc,gcc-avr 1:4.5.3-1
  arduino-core,gcc-avr
Dependencies:
1:4.5.3-3 - libc6 (2 2.11) libgmp10 (0 (null)) libmpc2 (0 (null)) libmpfr4 (2 3.1.0) zlib1g (2 1:1.1.4) binutils-avr (2 2.18-4) task-c-devel (0 (null)) gcc-doc (2 4:4.0.2-1) gcc-4.2 (0 (null)) avr-libc (2 1:1.6.2-2) avr-libc (1 1:1.6.2-1) avr-libc:i386 (1 1:1.6.2-1) gcc-avr:i386 (0 (null))
Provides:
1:4.5.3-3 - c-compiler-avr
Reverse Provides:


sid@flashpoint:~/Desktop/cp-fw$ sudo apt-cache showpkg libc-avr
N: Unable to locate package libc-avr
sid@flashpoint:~/Desktop/cp-fw$ sudo apt-cache showpkg avr-libc
Package: avr-libc
Versions:
1:1.7.1-2 (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages) (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_binary-amd64_Packages
                  MD5: f8da43e684408fb968aa4789b21feef2
 Description Language: en
                 File: /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Translation-en
                  MD5: f8da43e684408fb968aa4789b21feef2


Reverse Depends:
  arduino-core,avr-libc
  gcc-avr:i386,avr-libc 1:1.6.2-1
  gcc-avr,avr-libc 1:1.6.2-1
  gcc-avr,avr-libc 1:1.6.2-2
  arduino-core,avr-libc
Dependencies:
1:1.7.1-2 - gcc-avr (2 1:4.5.3-1) binutils-avr (2 2.20.1-2)
Provides:
1:1.7.1-2 -
Reverse Provides: