gnu: glew: Fix cross-compiling.

* gnu/packages/gl.scm (mesa)[native-inputs]: When cross-compiling, add
cmake-minimal-cross.
[arguments]: Adjust 'fix-cross-compiling to find llvm.
* gnu/packages/llvm.scm (llvm-for-mesa)
[arguments]<#:configure-flags>: When cross-compiling, set
-DBUILD_SHARED_LIBS:BOOL=TRUE and -DCMAKE_BUILD_WITH_INSTALL_RPATH=TRUE,
remove -DLLVM_LINK_LLVM_DYLIB.*.
<#:phases>: When cross-compiling, remove the 'delete-static-libraries phase.

Change-Id: If10dec7695e62604e080230e10f2b8d7167f660b
Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

2 files changed, 32 insertions, 15 deletions

diff --git a/gnu/packages/gl.scm b/gnu/packages/gl.scm
index ee76fe0ec0..7998142b4d 100644
--- a/gnu/packages/gl.scm
+++ b/gnu/packages/gl.scm
@@ -18,7 +18,7 @@
 ;;; Copyright © 2021, 2022, 2023 John Kehayias <john.kehayias@protonmail.com>
 ;;; Copyright © 2022 Petr Hodina <phodina@protonmail.com>
 ;;; Copyright © 2023 Kaelyn Takata <kaelyn.alexi@protonmail.com>
-;;; Copyright © 2023 Zheng Junjie <873216071@qq.com>
+;;; Copyright © 2023, 2024 Zheng Junjie <873216071@qq.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -62,6 +62,7 @@
   #:use-module (guix download)
   #:use-module (guix git-download)
   #:use-module (guix hg-download)
+  #:use-module (gnu packages cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system meson)
@@ -338,7 +339,8 @@ also known as DXTn or DXTC) for Mesa.")
             python-wrapper
             (@ (gnu packages base) which)
             (if (%current-target-system)
-              (list pkg-config-for-build
+              (list cmake-minimal-cross
+                    pkg-config-for-build
                     wayland
                     wayland-protocols)
               '())))
@@ -415,10 +417,13 @@ svga,swrast,virgl,zink")))
        #~(modify-phases %standard-phases
          #$@(if (%current-target-system)
               #~((add-after 'unpack 'fix-cross-compiling
-                   (lambda* (#:key inputs #:allow-other-keys)
-                     ;; It isn't a problem to use the host's llvm-config.
-                     (setenv "LLVM_CONFIG"
-                             (search-input-file inputs "/bin/llvm-config")))))
+                   (lambda* (#:key native-inputs #:allow-other-keys)
+                     ;; When cross compiling, we use cmake to find llvm, not
+                     ;; llvm-config, because llvm-config cannot be executed
+                     ;; see https://github.com/llvm/llvm-project/issues/58984
+                     (setenv "CMAKE"
+                             (search-input-file
+                              native-inputs "/bin/cmake")))))
               #~())
          (add-after 'unpack 'disable-failing-test
            (lambda _
diff --git a/gnu/packages/llvm.scm b/gnu/packages/llvm.scm
index 6abd1a67d7..4a7cb8033d 100644
--- a/gnu/packages/llvm.scm
+++ b/gnu/packages/llvm.scm
@@ -27,6 +27,7 @@
 ;;; Copyright © 2022 Clément Lassieur <clement@lassieur.org>
 ;;; Copyright © 2022 Zhu Zihao <all_but_last@163.com>
 ;;; Copyright © 2023 Hilton Chain <hako@ultrarare.space>
+;;; Copyright © 2023, 2024 Zheng Junjie <873216071@qq.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -2169,20 +2170,31 @@ using @code{clang-rename}.")))
               ;; AMDGPU is needed by the vulkan drivers.
               #$(string-append "-DLLVM_TARGETS_TO_BUILD="
                                (system->llvm-target) ";AMDGPU")
+              #$@(if (%current-target-system)
+                     '("-DBUILD_SHARED_LIBS:BOOL=TRUE"
+                       "-DCMAKE_BUILD_WITH_INSTALL_RPATH=TRUE")
+                    '())
               ;; Skipping tools and utils decreases the output by ~100 MiB.
               "-DLLVM_BUILD_TOOLS=NO"
-              (remove (cut string-match
-                           "-DLLVM_(TARGETS_TO_BUILD|INSTALL_UTILS).*" <>)
+              (remove
+               (cut string-match
+                    #$(if (%current-target-system)
+                          "-DLLVM_(LINK_LLVM_DYLIB|TARGETS_TO_BUILD|INSTALL_UTILS).*"
+                          "-DLLVM_(TARGETS_TO_BUILD|INSTALL_UTILS).*") <>)
                       #$cf)))
          ((#:phases phases '%standard-phases)
           #~(modify-phases #$phases
-              (add-after 'install 'delete-static-libraries
-                ;; If these are just relocated then llvm-config can't find them.
-                (lambda* (#:key outputs #:allow-other-keys)
-                  (for-each delete-file
-                            (find-files (string-append
-                                          (assoc-ref outputs "out") "/lib")
-                                        "\\.a$"))))
+              #$@(if (%current-target-system)
+                     '()
+                     #~((add-after 'install 'delete-static-libraries
+                          ;; If these are just relocated then llvm-config
+                          ;; can't find them.
+                          (lambda* (#:key outputs #:allow-other-keys)
+                            (for-each delete-file
+                                      (find-files
+                                       (string-append
+                                        (assoc-ref outputs "out") "/lib")
+                                       "\\.a$"))))))
               ;; llvm-config is how mesa and others find the various
               ;; libraries and headers they use.
               (add-after 'install 'build-and-install-llvm-config