From 084994db9c858b79ffe37dd1fc7205150d0a2447 Mon Sep 17 00:00:00 2001
From: TZ <tz-rrze@users.noreply.github.com>
Date: Wed, 8 Jul 2020 08:42:49 +0200
Subject: [PATCH] ncl: fix compilation errors with Intel compilers (#17391)
The Intel compilers are more strict and require special command
line options (like -std=c99) to properly compile NCL.
---
var/spack/repos/builtin/packages/ncl/package.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/var/spack/repos/builtin/packages/ncl/package.py b/var/spack/repos/builtin/packages/ncl/package.py
index 4d9980ecc5..046dd9b3a8 100644
--- a/var/spack/repos/builtin/packages/ncl/package.py
+++ b/var/spack/repos/builtin/packages/ncl/package.py
@@ -144,7 +144,9 @@ def prepare_site_config(self):
c2f_flags.extend(['-lgfortran', '-lm'])
elif self.compiler.name == 'intel':
fc_flags.append('-fp-model precise')
- cc_flags.append('-fp-model precise')
+ cc_flags.append('-fp-model precise'
+ ' -std=c99'
+ ' -D_POSIX_C_SOURCE=2 -D_GNU_SOURCE')
c2f_flags.extend(['-lifcore', '-lifport'])
if self.spec.satisfies('%gcc@10:'):
--
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