simplify cross arch preloading

This commit does a couple of things. In the mangohud launch script, the library will be found using $LIB with ld, so the correct path is selected depending on the cpu arch. The same is done for mangohud.json (vulkan layer). In addition some now unused files have been deleted.

Signed-off-by: Stephan Lachnit <stephanlachnit@protonmail.com>

bin/mangohud.in

@@ -1,10 +1,5 @@
 #!/bin/sh
 
-MANGOHUD_LIB_NAME="libMangoHud.so"
-if [ "$MANGOHUD_DLSYM" = "1" ]; then
-	MANGOHUD_LIB_NAME="libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
-fi
-
 if [ "$#" -eq 0 ]; then
 	programname=`basename "$0"`
 	echo "ERROR: No program supplied"
@@ -13,13 +8,16 @@ if [ "$#" -eq 0 ]; then
 	exit 1
 fi
 
-# Execute the program under a clean environment
-# pass through the overriden LD_PRELOAD environment variables
-LD_PRELOAD="${LD_PRELOAD}:${MANGOHUD_LIB_NAME}"
-LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:@libdir_mangohud@"
+MANGOHUD_LIB_NAME="libMangoHud.so"
 
-if hash @mangohud_sh@ 2>/dev/null; then
-  exec env MANGOHUD=1 LD_LIBRARY_PATH="${LD_LIBRARY_PATH}" LD_PRELOAD="${LD_PRELOAD}" @mangohud_sh@ "$@"
-else
-  exec env MANGOHUD=1 LD_LIBRARY_PATH="${LD_LIBRARY_PATH}" LD_PRELOAD="${LD_PRELOAD}" "$@"
+if [ "$MANGOHUD_DLSYM" = "1" ]; then
+	MANGOHUD_LIB_NAME="libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
 fi
+
+# Preload using the plain filesnames of the libs, the dynamic linker will
+# figure out whether the 32 or 64 bit version should be used, and will search
+# for it in the correct directory
+LD_PRELOAD="${LD_PRELOAD}:${MANGOHUD_LIB_NAME}"
+LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:@ld_libdir_mangohud@"
+
+exec env MANGOHUD=1 LD_LIBRARY_PATH="${LD_LIBRARY_PATH}" LD_PRELOAD="${LD_PRELOAD}" "$@"

src/mangohud.json.in

@@ -1,10 +1,10 @@
 {
     "file_format_version" : "1.0.0",
     "layer" : {
-      "name": "@PROJECT_NAME@@LAYER_SUFFIX@",
+      "name": "VK_LAYER_@PROJECT_NAME@_overlay",
       "type": "GLOBAL",
       "api_version": "1.2.135",
-      "library_path": "@libdir_mangohud@libMangoHud.so",
+      "library_path": "@ld_libdir_mangohud@libMangoHud.so",
       "implementation_version": "1",
       "description": "Vulkan Hud Overlay",
       "functions": {
@@ -19,4 +19,3 @@
       }
     }
 }
-

src/meson.build

@@ -2,9 +2,11 @@ glslang = find_program('glslangValidator')
 
 # Needs prefix for configure_file()
 if get_option('append_libdir_mangohud')
-  libdir_mangohud = join_paths(get_option('prefix'), get_option('libdir'), 'mangohud')
+  libdir_mangohud = join_paths(get_option('libdir'), 'mangohud')
+  ld_libdir_mangohud = get_option('prefix') + '/\$LIB/mangohud/'
 else
-  libdir_mangohud = join_paths(get_option('prefix'), get_option('libdir'))
+  libdir_mangohud = get_option('libdir')
+  ld_libdir_mangohud = get_option('prefix') + '/\$LIB/'
 endif
 
 overlay_shaders = [
@@ -163,26 +165,16 @@ mangohud_dlsym = shared_library(
 )
 
 configure_file(input : 'mangohud.json.in',
-  output : '@0@.@1@.json'.format(meson.project_name(), target_machine.cpu_family()),
-  configuration : {'libdir_mangohud' : libdir_mangohud + '/',
-                  'PROJECT_NAME' : meson.project_name() + ' ',
-                  'LAYER_SUFFIX' : target_machine.cpu_family()},
+  output : '@0@.json'.format(meson.project_name()),
+  configuration : {'ld_libdir_mangohud' : ld_libdir_mangohud,
+                  'PROJECT_NAME' : meson.project_name()},
   install : true,
   install_dir : join_paths(get_option('datadir'), 'vulkan', 'implicit_layer.d'),
 )
 
-if target_machine.cpu_family() == 'x86_64'
-  mangohud_cpu_family = ''
-  mangohud_opposite_bin = 'mangohud.x86'
-else
-  mangohud_cpu_family = '.@0@'.format(target_machine.cpu_family())
-#this is probably dumb but works for now
-  mangohud_opposite_bin = 'intentionally_borked'
-endif
-
 configure_file(input : '../bin/mangohud.in',
-  output : 'mangohud@0@'.format(mangohud_cpu_family),
-  configuration : {'libdir_mangohud' : libdir_mangohud, 'mangohud_sh' : mangohud_opposite_bin},
+  output : 'mangohud',
+  configuration : {'ld_libdir_mangohud' : ld_libdir_mangohud},
   install_dir : get_option('bindir'),
 )