Subject: [bug#49713] [PATCH 2/3] gnu: Add libigl.

From: Ivan Gankevich <[email-masked]>
Date: Sat, 24 Jul 2021 00:07:32 +0300

* gnu/packages/engineering.scm (libigl): New variable.
---
 gnu/packages/engineering.scm | 62 ++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/gnu/packages/engineering.scm b/gnu/packages/engineering.scm
index fc932ddb28..eec12814ff 100644
--- a/gnu/packages/engineering.scm
+++ b/gnu/packages/engineering.scm
@@ -2862,3 +2862,65 @@ for hooking Linux system calls in user space.  This is achieved by
 hot-patching the machine code of the standard C library in the memory of
 a process.")
       (license license:bsd-2))))
+
+(define-public libigl
+  (package
+    (name "libigl")
+    (version "2.3.0")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/libigl/libigl")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+          (base32
+            "004a22ifq2vibgkgvrlyihqimpsfizvq5l448204kwfg3lkycajj"))))
+    (build-system cmake-build-system)
+    (arguments
+      `(#:configure-flags
+        (list "-DLIBIGL_USE_STATIC_LIBRARY=OFF"
+              "-DLIBIGL_BUILD_TESTS=OFF" ;; tests need to download test data
+              "-DLIBIGL_BUILD_TUTORIALS=OFF"
+              "-DLIBIGL_EXPORT_TARGETS=ON"
+              "-DLIBIGL_WITH_CGAL=ON"
+              "-DLIBIGL_WITH_COMISO=OFF"
+              "-DLIBIGL_WITH_CORK=OFF"
+              "-DLIBIGL_WITH_EMBREE=OFF"
+              "-DLIBIGL_WITH_MATLAB=OFF"
+              "-DLIBIGL_WITH_MOSEK=OFF"
+              "-DLIBIGL_WITH_OPENGL=OFF"
+              "-DLIBIGL_WITH_OPENGL_GLFW=OFF"
+              "-DLIBIGL_WITH_OPENGL_GLFW_IMGUI=OFF"
+              "-DLIBIGL_WITH_PNG=OFF"
+              "-DLIBIGL_WITH_TETGEN=OFF"
+              "-DLIBIGL_WITH_TRIANGLE=OFF"
+              "-DLIBIGL_WITH_PREDICATES=OFF"
+              "-DLIBIGL_WITH_XML=OFF")
+        #:tests? #f
+        #:phases
+        (modify-phases %standard-phases
+          (add-before 'configure 'do-not-download-dependencies
+            (lambda _
+              (substitute* "cmake/libigl.cmake"
+                (("if\\(NOT TARGET Eigen3::Eigen\\)" all)
+                 (string-append "find_package(Eigen3 CONFIG REQUIRED)\n" all))
+                (("if\\(NOT TARGET CGAL::CGAL\\)" all)
+                 (string-append "find_package(CGAL CONFIG COMPONENTS Core)\n" all)))))
+          (add-after 'install 'install-all-subdirs
+            (lambda _
+              (copy-recursively
+                "../source/include"
+                (string-append (assoc-ref %outputs "out") "/include")))))))
+    (inputs
+      `(("eigen" ,eigen)
+        ("cgal" ,cgal)
+        ("gmp" ,gmp)
+        ("mpfr" ,mpfr)
+        ("boost" ,boost)))
+    (home-page "https://libigl.github.io/")
+    (synopsis "Simple C++ geometry processing library")
+    (description "The library provides functionality for shape modelling,
+visualization, matrix manipulation.")
+    (license (list license:gpl3 license:mpl2.0))))
-- 
2.32.0