Description
https://github.com/Proxmark/proxmark3/wiki/Gentoo-Linux reads
sudo emerge git p7zip make gcc readline dev-libs/libusb perl wget dev-qt/qt-meta:4 sys-apps/pcsc-lite
there is confusion in the name of ebuilds, so it should be something like
sudo emerge dev-vcs/git p7zip make sys-devel/gcc sys-libs/readline dev-libs/libusb perl wget dev-qt/qt-meta:4 sys-apps/pcsc-lite
furthermore, dev-qt/qt-meta does not exist anymore in the repositories.
furthermore still,
Get devkitARM release 41 from SourceForge (choose either the 64/32 –bit depending on your architecture, it is assumed you know how to check and recognize your architecture):
(64-bit) http://sourceforge.net/projects/devkitpro/files/devkitARM/previous/devkitARM_r41-x86_64-linux.tar.bz2/download
(32-bit) http://sourceforge.net/projects/devkitpro/files/devkitARM/previous/devkitARM_r41-i686-linux.tar.bz2/download
both links point to pages that will loop back on themselves and will not allow a download ; this is in both the Reflashing Proxmark3 and Driver Installation sections.
Some other webpage related to devkitpro https://devkitpro.org/wiki/devkitPro_pacman#Gentoo is also way beyond obsolete, as sys-apps/pacman does not exist anymore.
instructions to compile on Linux in https://github.com/Proxmark/proxmark3/blob/master/COMPILING.txt are 1) wrong and 2) incomplete.