mesa: avoid opportunistic usage of libelf

Author: barracuda156

x11/mesa/Portfile

@@ -60,7 +60,8 @@ patchfiles              patch-meson-spec-python.diff \
                         patch-fix-build.diff \
                         patch-fix-linking.diff \
                         patch-fix-32-bit.diff \
-                        patch-meson.build.diff
+                        patch-meson.build.diff \
+                        patch-no-libelf-on-darwin.diff
 
 # To be replaced with upstream fix, hopefully:
 patchfiles-append       patch-frontend_screen.diff

x11/mesa/files/patch-no-libelf-on-darwin.diff

@@ -0,0 +1,18 @@
+--- meson.build.orig	2024-12-16 14:55:52.000000000 +0800
++++ meson.build	2024-12-16 17:38:27.000000000 +0800
+@@ -1902,6 +1902,7 @@
+   dep_version = cpp.find_library('version')
+ endif
+ 
++if host_machine.system() != 'darwin'
+ dep_elf = dependency('libelf', required : false)
+ if not with_platform_windows and not dep_elf.found()
+   dep_elf = cc.find_library('elf', required : false)
+@@ -1911,6 +1912,7 @@
+ elif with_gallium_radeonsi
+   error('Gallium driver radeonsi requires libelf')
+ endif
++endif
+ 
+ dep_valgrind = dependency('valgrind', required : get_option('valgrind'))
+ if dep_valgrind.found()