From 6f44e3c192155aa665214b2631f0187498800201 Mon Sep 17 00:00:00 2001
From: nils meyer <nils.meyer@ur.de>
Date: Thu, 23 Apr 2020 11:18:50 +0200
Subject: [PATCH] reverted changes in configure.ac ; included SVE configure
 readme

---
 SVE_README.txt | 10 ++++++++++
 configure.ac   |  8 +++-----
 2 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 SVE_README.txt

diff --git a/SVE_README.txt b/SVE_README.txt
new file mode 100644
index 00000000..b60d0427
--- /dev/null
+++ b/SVE_README.txt
@@ -0,0 +1,10 @@
+armclang 20.0 VLA
+
+../configure --with-lime=/home/men04359/lime/c-lime --without-hdf5 --enable-gen-simd-width=64 --enable-simd=GEN --enable-precision=double --enable-comms=none --enable-openmp CXX=g++-10.0.1 CC=gcc-10.0.1 CXXFLAGS="-std=c++11 -march=armv8-a+sve -msve-vector-bits=512 -fno-gcse -DA64FX -DA64FXASM -DDSLASHINTRIN" LDFLAGS=-static GRID_LDFLAGS=-static MPI_CXXLDFLAGS=-static
+
+
+gcc 10.0.1 VLA
+
+../configure --with-lime=/home/men04359/lime/c-lime --without-hdf5 --enable-gen-simd-width=64 --enable-simd=GEN --enable-precision=double --enable-comms=none --enable-openmp CXX=armclang++ CC=armclang CXXFLAGS="-std=c++11 -fno-unroll-loops -mllvm -vectorizer-min-trip-count=2 -march=armv8-a+sve -DA64FX -DA64FXASM -DDSLASHINTRIN" LDFLAGS=-static GRID_LDFLAGS=-static MPI_CXXLDFLAGS=-static
+
+should remove "-fno-strict-aliasing" for gcc 10
diff --git a/configure.ac b/configure.ac
index ec774b49..2980a6d5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -286,13 +286,11 @@ case ${CXX} in
        CXXFLAGS="$CXXFLAGS -Xcompiler -fopenmp"
     fi
     ;;
-  g++-10.0.1)
-  # removed -fno-strict-aliasing for gcc 10 dev build only
-  CXXFLAGS="$CXXFLAGS"
-  ;;
   *)
     CXXLD=${CXX}
-    CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
+    #
+    #CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
+    CXXFLAGS="$CXXFLAGS"
     ;;
 esac