Update README.md with instructions for arch.

e29d01d4 · Florian Goth · 51287787 · e29d01d4
Commit e29d01d4 authored Feb 15, 2018 by Florian Goth
--- a/README.md
+++ b/README.md
@@ -19,8 +19,9 @@ In the following we give hints on how to install relevant packages.
 #### OpenSuSE / SLES
 - sudo zypper install gcc-gfortran make lapack-devel

+#### Arch Linux
+- pacman -S make gcc-fortran lapack
 ToDo:
-Arch Linux. Has a couple of derivatives. We will assume they are equal...

 ### Other Unixes
 gfortran and the lapack implementation from netlib.org should be available for