Meson option to have absolute paths in LD_PRELOAD

bin/mangohud.in

@@ -13,10 +13,10 @@ if [ "$1" = "--dlsym" ]; then
 	shift
 fi
 
-MANGOHUD_LIB_NAME="libMangoHud.so"
+MANGOHUD_LIB_NAME="@ld_libdir_mangohud_abs@libMangoHud.so"
 
 if [ "$MANGOHUD_DLSYM" = "1" ]; then
-	MANGOHUD_LIB_NAME="libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
+	MANGOHUD_LIB_NAME="@ld_libdir_mangohud_abs@libMangoHud_dlsym.so:${MANGOHUD_LIB_NAME}"
 fi
 
 # Preload using the plain filesnames of the libs, the dynamic linker will

build.sh

@@ -142,14 +142,14 @@ configure() {
     dependencies
     git submodule update --init --depth 50
     if [[ ! -f "build/meson64/build.ninja" ]]; then
-        meson build/meson64 --libdir lib/mangohud/lib --prefix /usr -Dappend_libdir_mangohud=false -Dld_libdir_prefix=true $@ ${CONFIGURE_OPTS}
+        meson build/meson64 --libdir lib/mangohud/lib --prefix /usr -Dappend_libdir_mangohud=false -Dld_libdir_prefix=true -Dld_libdir_abs=true $@ ${CONFIGURE_OPTS}
     fi
     if [[ ! -f "build/meson32/build.ninja" ]]; then
         export CC="gcc -m32"
         export CXX="g++ -m32"
         export PKG_CONFIG_PATH="/usr/lib32/pkgconfig:/usr/lib/i386-linux-gnu/pkgconfig:/usr/lib/pkgconfig:${PKG_CONFIG_PATH_32}"
         export LLVM_CONFIG="/usr/bin/llvm-config32"
-        meson build/meson32 --libdir lib/mangohud/lib32 --prefix /usr -Dappend_libdir_mangohud=false -Dld_libdir_prefix=true $@ ${CONFIGURE_OPTS}
+        meson build/meson32 --libdir lib/mangohud/lib32 --prefix /usr -Dappend_libdir_mangohud=false -Dld_libdir_prefix=true -Dld_libdir_abs=true $@ ${CONFIGURE_OPTS}
     fi
 }
 

meson_options.txt

@@ -2,6 +2,7 @@ option('glibcxx_asserts', type : 'boolean', value : false)
 option('use_system_vulkan', type : 'feature', value : 'disabled', description: 'Use system vulkan headers instead of the provided ones')
 option('append_libdir_mangohud', type : 'boolean', value : true, description: 'Append "mangohud" to libdir path or not.')
 option('ld_libdir_prefix', type : 'boolean', value : false, description: 'Set ld libdir to "$prefix/lib/mangohud/\$LIB"')
+option('ld_libdir_abs', type : 'boolean', value : false, description: 'Use absolute path in LD_PRELOAD')
 option('include_doc', type : 'boolean', value : true, description: 'Include the example config')
 option('with_nvml', type : 'combo', value : 'enabled', choices: ['enabled', 'system', 'disabled'], description: 'Enable NVML support')
 option('with_xnvctrl', type : 'feature', value : 'enabled', description: 'Enable XNVCtrl support')

src/meson.build

@@ -1,5 +1,6 @@
 glslang = find_program('glslangValidator')
 
+ld_libdir_mangohud_abs = ''
 # Needs prefix for configure_file()
 if get_option('append_libdir_mangohud')
   libdir_mangohud = join_paths(get_option('libdir'), 'mangohud')
@@ -15,6 +16,10 @@ if get_option('ld_libdir_prefix')
   ld_libdir_mangohud = get_option('prefix') + '/lib/mangohud/\$LIB/'
 endif
 
+if get_option('ld_libdir_abs')
+  ld_libdir_mangohud_abs = ld_libdir_mangohud
+endif
+
 overlay_shaders = [
   'overlay.frag',
   'overlay.vert',
@@ -205,7 +210,8 @@ configure_file(input : 'mangohud.json.in',
 
 configure_file(input : '../bin/mangohud.in',
   output : 'mangohud',
-  configuration : {'ld_libdir_mangohud' : ld_libdir_mangohud},
+  configuration : {'ld_libdir_mangohud' : ld_libdir_mangohud,
+                   'ld_libdir_mangohud_abs': ld_libdir_mangohud_abs},
   install_dir : get_option('bindir'),
 )