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-rw-r--r--gnu/packages/maths.scm6
1 files changed, 4 insertions, 2 deletions
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index a1bd7846f8..e432ed5c05 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -563,7 +563,10 @@ incompatible with HDF5.")
(inputs
`(("zlib" ,zlib)))
(arguments
- `(#:phases
+ `(;; Some of the users, notably Flann, need the C++ interface.
+ #:configure-flags '("--enable-cxx")
+
+ #:phases
(modify-phases %standard-phases
(add-before 'configure 'patch-configure
(lambda _
@@ -2723,7 +2726,6 @@ set.")
;; Custom install because docs/Makefile doesn't honor ${docdir}.
(let* ((doc (assoc-ref outputs "doc"))
(docdir (string-append doc "/share/doc/hypre-" ,version)))
- (mkdir-p docdir)
(with-directory-excursion "docs"
(for-each (lambda (base)
(install-file (string-append base ".pdf") docdir)