gnu: povray: Fix rendering problems.

GCC 12 introduced aggressive optimizations with the -ffast-maths flag,
which prevent POV-Ray from functionning normally.

Merges: https://codeberg.org/guix/guix/pulls/10259
References: https://github.com/POV-Ray/povray/issues/482#issuecomment-3477471942
Signed-off-by: Nguyễn Gia Phong <cnx@loang.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/gnu/packages/graphics.scm b/gnu/packages/graphics.scm
index 1bda6186240..be4bd8f3c9f 100644
--- a/gnu/packages/graphics.scm
+++ b/gnu/packages/graphics.scm
@@ -2094,7 +2094,10 @@ in Julia).")
       #~(list "COMPILED_BY=Guix"
               (string-append "--with-boost-libdir="
                              #$(this-package-input "boost") "/lib")
-              "--disable-optimiz-arch")
+              "--disable-optimiz-arch"
+              ;; Render breaks with -ffast-math optimizations:
+              ;; https://github.com/POV-Ray/povray/issues/482
+              "CXXFLAGS=-fno-finite-math-only")
        #:phases
        '(modify-phases %standard-phases
           (add-after 'unpack 'run-prebuild