anv: Give the installed intel_icd.json file an absolute path

Not providing a path allows the ICD to work on multi-arch systems but
breaks it if you install anywhere other than /usr/lib.  Given that users
may be installing locally in .local or similar, we probably do want to
provide a filename.  Distros can carry a revert of this commit if they want
an intel_icd.json file without the path.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Chad Versace <chad@kiwitree.net>

src/intel/vulkan/.gitignore

@@ -3,3 +3,4 @@
 /anv_entrypoints.h
 /anv_timestamp.h
 /dev_icd.json
+/intel_icd.json

src/intel/vulkan/Makefile.am

@@ -141,7 +141,7 @@ anv_timestamp.h:
 	$(AM_V_GEN) echo "#define ANV_TIMESTAMP \"$(TIMESTAMP_CMD)\"" > $@
 
 BUILT_SOURCES = $(VULKAN_GENERATED_FILES)
-CLEANFILES = $(BUILT_SOURCES) dev_icd.json
+CLEANFILES = $(BUILT_SOURCES) dev_icd.json intel_icd.json
 EXTRA_DIST = \
 	$(top_srcdir)/include/vulkan/vk_icd.h \
 	anv_entrypoints_gen.py \
@@ -170,6 +170,11 @@ dev_icd.json : dev_icd.json.in
 		-e "s#@build_libdir@#${abs_top_builddir}/${LIB_DIR}#" \
 		< $(srcdir)/dev_icd.json.in > $@
 
+intel_icd.json : intel_icd.json.in
+	$(AM_V_GEN) $(SED) \
+		-e "s#@install_libdir@#${libdir}#" \
+		< $(srcdir)/intel_icd.json.in > $@
+
 # Libvulkan with dummy gem. Used for unit tests.
 libvulkan_test_la_SOURCES = $(VULKAN_GEM_STUB_FILES)
 libvulkan_test_la_LIBADD = $(VULKAN_LIB_DEPS) -lX11-xcb

src/intel/vulkan/intel_icd.json.in

@@ -1,7 +1,7 @@
 {
     "file_format_version": "1.0.0",
     "ICD": {
-        "library_path": "libvulkan_intel.so",
+        "library_path": "@install_libdir@/libvulkan_intel.so",
         "abi_versions": "1.0.3"
     }
 }