From 674c5953b9e5ab1eee675c25d9462767bb2df8f5 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Thu, 10 Dec 2020 19:58:49 +0200
Subject: [PATCH] qrupdate: Fix FFLAGS

Apparently, undetected in #98499, trying to use the flags written makes
the build fail due to -O3.
---
 pkgs/development/libraries/qrupdate/default.nix | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/libraries/qrupdate/default.nix b/pkgs/development/libraries/qrupdate/default.nix
index 90d4cb45ce2..b941021cb68 100644
--- a/pkgs/development/libraries/qrupdate/default.nix
+++ b/pkgs/development/libraries/qrupdate/default.nix
@@ -25,10 +25,10 @@ stdenv.mkDerivation rec {
       "BLAS=-L${blas}/lib -lblas"
       "PREFIX=${placeholder "out"}"
       ${stdenv.lib.optionalString blas.isILP64
-      # Use their FFLAGS along with `-fdefault-integer-8`. If another
-      # application intends to use arpack, it should add this to it's FFLAGS as
-      # well. Otherwise (e.g): https://savannah.gnu.org/bugs/?50339
-      "FFLAGS=-fimplicit-none -O3 -funroll-loops -fdefault-integer-8"
+      # If another application intends to use qrupdate compiled with blas with
+      # 64 bit support, it should add this to it's FFLAGS as well. See (e.g):
+      # https://savannah.gnu.org/bugs/?50339
+      "FFLAGS=-fdefault-integer-8"
       }
     )
   '';