From 9a05dce3bf88ebe9c4d2a7b6f0a156d2d6fe2468 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <39388941+boomanaiden154@users.noreply.github.com>
Date: Tue, 18 Jul 2023 14:02:51 -0700
Subject: fftw: fix build with clang15+ (#38889)

In Clang 15, -Wint-conversion became an error instead of a warning,
breaking the fftw build for clang versions > 15. This patch fixes fftw
builds with clang 15+ by passing -Wno-error=int-conversion as a cflag.
---
 var/spack/repos/builtin/packages/fftw/package.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'var')

diff --git a/var/spack/repos/builtin/packages/fftw/package.py b/var/spack/repos/builtin/packages/fftw/package.py
index 9b87254451..0aab3f71f7 100644
--- a/var/spack/repos/builtin/packages/fftw/package.py
+++ b/var/spack/repos/builtin/packages/fftw/package.py
@@ -63,6 +63,13 @@ class FftwBase(AutotoolsPackage):
 
         return find_libraries(libraries, root=self.prefix, recursive=True)
 
+    def flag_handler(self, name, flags):
+        if name == "cflags":
+            if self.spec.satisfies("%clang@15:"):
+                flags.append("-Wno-error=int-conversion")
+
+        return flags, None, None
+
     def patch(self):
         # If fftw/config.h exists in the source tree, it will take precedence
         # over the copy in build dir.  As only the latter has proper config
-- 
cgit v1.2.3-60-g2f50