From 7360ddff81224feed23de0ba5bb8da2617ddb75f Mon Sep 17 00:00:00 2001
From: Matthieu Schaller <schaller@strw.leidenuniv.nl>
Date: Thu, 17 Oct 2019 22:16:36 +0200
Subject: [PATCH] Add the new variable to the help message
---
configure.ac | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/configure.ac b/configure.ac
index cabb62559b..4d4c9ef31d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -457,20 +457,21 @@ if test "$enable_opt" = "yes" ; then
# Choose the best flags for the gravity sub-library on this compiler and architecture
if test "$ax_cv_c_compiler_vendor" = "intel"; then
if test "$detected_ax_icc_flag" = "-xCORE-AVX512"; then
- GRAVITY_CFLAGS="-qopt-zmm-usage=high"
+ GRAVITY_CFLAGS="$GRAVITY_CFLAGS -qopt-zmm-usage=high"
else
AC_MSG_WARN([No additional flags needed for gravity on this platform])
fi
elif test "$ax_cv_c_compiler_vendor" = "gnu"; then
if test "$detected_ax_gcc_arch" = "skylake-avx512"; then
- GRAVITY_CFLAGS="-mprefer-vector-width=512"
+ GRAVITY_CFLAGS="$GRAVITY_CFLAGS -mprefer-vector-width=512"
else
AC_MSG_WARN([No additional flags needed for gravity on this platform])
fi
else
AC_MSG_WARN([Do not know what best gravity vectorization flags to choose for this compiler])
fi
- AC_SUBST([GRAVITY_CFLAGS])
+ AC_ARG_VAR([GRAVITY_CFLAGS], [C compiler flags added to the basic CFLAGS to compile
+ the gravity-related files.])
# Check SSE & AVX support (some overlap with AX_CC_MAXOPT).
# Don't use the SIMD_FLAGS result with Intel compilers. The -x<code>
--
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