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Commit 515205cf authored by giannozz's avatar giannozz
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Merge branch 'master' into 'develop'

Updates to user guide

See merge request QEF/q-e!395
parents 54b4064e 2abe3336
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......@@ -947,6 +947,7 @@ the last written output file to understand why.
\begin{itemize}
\item
Working Fortran and C compilers, compliant with F2003 and C89 standards
(see Sec.\ref{Sec:Installation})
respectively, are needed in order to compile \qe. Most recent Fortran
compilers will do the job.
......@@ -1111,6 +1112,10 @@ add preprocessing option \texttt{-Dzdotc=zdotc\_wrapper} to \texttt{DFLAGS}.
\paragraph{Linux PCs with Intel compiler (ifort)}
IMPORTANT NOTE: ifort versions earlier than v.15 miscompile the new
XML code in QE v.6.4 and later. Please install this patch:\\
\texttt{https://gitlab.com/QEF/q-e/wikis/Patch-for-old-Intel-compilers}.
The Intel compiler ifort \texttt{http://software.intel.com/}
produces fast executables, at least on Intel CPUs, but not all versions
work as expected. In case of trouble, update your version
......@@ -1134,8 +1139,6 @@ The warning: {\em feupdateenv is not implemented and will always fail},
can be safely ignored. Warnings on ``bad preprocessing option'' when compiling
iotk and complains about ``recommended formats'' may also be ignored.
Versions v.12 and earlier of ifort are no longer supported by QE v.\version.
\paragraph{Linux PCs with MKL libraries}
On Intel CPUs it is very convenient to use Intel MKL libraries
(freely available at
......
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