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-rw-r--r--doc/UsersGuide/RunningCactus.tex4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/UsersGuide/RunningCactus.tex b/doc/UsersGuide/RunningCactus.tex
index 702714fd..dc0a1166 100644
--- a/doc/UsersGuide/RunningCactus.tex
+++ b/doc/UsersGuide/RunningCactus.tex
@@ -720,6 +720,7 @@ the configure options are
PETSC = yes | no | <blank>
[ PETSC_DIR = <dir> ]
[ PETSC_ARCH = <architecture> ]
+[ PETSC_ARCH_LIBS = <architecture-specific libraries> ]
\end{verbatim}
If {\t PETSC\_DIR} is not given the configuration process will search for an
@@ -727,6 +728,9 @@ installed PETSc package in some standard places (defined in
{\tt lib/make/extras/PETSC}).
If {\t PETSC\_ARCH} is not given the configuration process will choose the
first PETSc configuration found in {\tt \$PETSC\_DIR/lib/libO/}.
+If {\t PETSC\_ARCH\_LIBS} is not given the configuration process will choose
+architecture-specific libraries as required by a PETSc configuration (usually
+PETSc needs the LAPACK library).
\subsubsection{PTHREADS: POSIX threads}