From 7b907517a15f06687bf5f9ae7792a255a11e2d39 Mon Sep 17 00:00:00 2001
From: marvinfriede <51965259+marvinfriede@users.noreply.github.com>
Date: Sat, 15 Feb 2025 10:30:03 +0100
Subject: [PATCH] Catch empty `-Dcustom_libraries` for custom LAPACK

---
 config/meson.build | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/config/meson.build b/config/meson.build
index 695f161f..6f0049d3 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -107,6 +107,9 @@ elif lapack_vendor == 'openblas'
 elif lapack_vendor == 'custom'
   custom_deps = []
   libs = get_option('custom_libraries')
+  if libs.length() == 0
+    error('Custom LAPACK vendor selected, but no custom libraries were provided. Please specify the custom libraries using the "-Dcustom_libraries" option.')
+  endif
   if libs[0].startswith('-L')
     foreach lib: libs
       if lib != libs[0]