feat: switch build sytem to meson, asm optimization as a feature

Author: Masaiki

ports/libass/CMakeLists.txt

@@ -0,0 +1,59 @@
+diff --git a/libass/meson.build b/libass/meson.build
+index 5251c2f..a3429bb 100644
+--- a/libass/meson.build
++++ b/libass/meson.build
+@@ -70,6 +70,28 @@ if enable_asm
+ 
+     if asm_is_nasm
+         libass_src += asm_sources
++    elif asm_is_clang
++        clang = find_program('clang')
++        foreach asm_source : asm_sources
++            asm_output = fs.stem(asm_source.full_path()) + '.obj'
++            libass_src += custom_target(
++                asm_output,
++                input: asm_source,
++                output: asm_output,
++                depends: config_h,
++                command: [
++                    clang,
++                ] + asm_clang_args + [
++                    '-I' + meson.project_build_root(),
++                    '-I' + meson.current_source_dir(),
++                ] + asm_args + [
++                    '-c',
++                    '@INPUT@',
++                    '-o',
++                    '@OUTPUT@',
++                ],
++            )
++        endforeach
+     else
+         asm_lib = static_library(
+             'libass_asm',
+diff --git a/meson.build b/meson.build
+index 4b1c24e..b82233e 100644
+--- a/meson.build
++++ b/meson.build
+@@ -207,7 +207,9 @@ endif
+ enable_asm = false
+ # used in libass/meson.build
+ asm_is_nasm = false
++asm_is_clang = false
+ asm_args = []
++asm_clang_args = []
+ 
+ # ASM architecture variables
+ asm_option = get_option('asm')
+@@ -276,6 +278,10 @@ if not asm_option.disabled()
+         enable_asm = true
+         conf.set('ARCH_AARCH64', 1)
+         if host_system == 'darwin'
+             asm_args += '-DPREFIX'
++        elif host_system == 'windows' and cc.get_argument_syntax() == 'msvc' and cc.get_id() != 'clang-cl'
++            # MSVC cannot compile GNU-style AArch64 .S sources.
++            asm_is_clang = true
++            asm_clang_args += '--target=arm64-pc-windows-msvc'
+         endif
+     else
+         warning(

ports/libass/arm64-windows-asm.patch

@@ -4,29 +4,48 @@ vcpkg_from_github(
     REF ${VERSION}
     SHA512 08762623dd09e3034699ba9d11b70d1f6cc6b2e3b38aa897b07efef1364e76141df484e70ed27888cf3595b77d072cdb5e8abbbfa560e33ca21f87872e24df8d
     HEAD_REF master
+    PATCHES
+        arm64-windows-asm.patch
 )
 
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/config.h.in DESTINATION ${SOURCE_PATH})
-
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/libass.def DESTINATION ${SOURCE_PATH})
-
-# Since libass uses automake, make and configure, we use a custom CMake file
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
-
-file(COPY ${SOURCE_PATH}/libass/ass.h ${SOURCE_PATH}/libass/ass_types.h DESTINATION ${CURRENT_PACKAGES_DIR}/include/ass)
-
 vcpkg_find_acquire_program(PKGCONFIG)
 get_filename_component(PKGCONFIG_EXE_PATH ${PKGCONFIG} DIRECTORY)
 vcpkg_add_to_path(${PKGCONFIG_EXE_PATH})
 
-vcpkg_cmake_configure(
-    OPTIONS -DLIBASS_VERSION=${VERSION}
-    SOURCE_PATH ${SOURCE_PATH}
+list(APPEND options
+    -Dcheckasm=disabled
+    -Dcompare=disabled
+    -Dfuzz=disabled
+    -Dprofile=disabled
+    -Dtest=disabled
+)
+
+set(additional_binaries "")
+if("asm" IN_LIST FEATURES)
+    list(APPEND options -Dasm=enabled)
+    if(VCPKG_TARGET_ARCHITECTURE MATCHES "^(x86|x64)$")
+        vcpkg_find_acquire_program(NASM)
+        get_filename_component(NASM_EXE_PATH "${NASM}" DIRECTORY)
+        vcpkg_add_to_path("${NASM_EXE_PATH}")
+    elseif(VCPKG_TARGET_IS_WINDOWS AND VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
+        vcpkg_find_acquire_program(CLANG)
+        list(APPEND additional_binaries "clang = ['${CLANG}']")
+    endif()
+else()
+    list(APPEND options -Dasm=disabled)
+endif()
+
+vcpkg_configure_meson(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        ${options}
+    ADDITIONAL_BINARIES
+        ${additional_binaries}
 )
 
-vcpkg_cmake_install()
+vcpkg_install_meson()
 vcpkg_copy_pdbs()
 vcpkg_fixup_pkgconfig()
 
 # Handle copyright
-file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/COPYING")

ports/libass/config.h.in

@@ -1,6 +1,7 @@
 {
   "name": "libass",
   "version": "0.17.4",
+  "port-version": 1,
   "description": "libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format",
   "homepage": "https://github.com/libass/libass",
   "license": "ISC",
@@ -13,8 +14,16 @@
     "fribidi",
     "harfbuzz",
     {
-      "name": "vcpkg-cmake",
+      "name": "vcpkg-tool-meson",
       "host": true
     }
-  ]
+  ],
+  "default-features": [
+    "asm"
+  ],
+  "features": {
+    "asm": {
+      "description": "Enable assembly optimizations"
+    }
+  }
 }

ports/libass/libass.def

@@ -4694,7 +4694,7 @@
     },
     "libass": {
       "baseline": "0.17.4",
-      "port-version": 0
+      "port-version": 1
     },
     "libassert": {
       "baseline": "2.2.1",

ports/libass/portfile.cmake

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "eb2f8e390cf39d20ab5ba8e955c91470cb6efda4",
+      "version": "0.17.4",
+      "port-version": 1
+    },
     {
       "git-tree": "a6cabb21ea77d49d7cc9bb55b53fcf7fe4f28e72",
       "version": "0.17.4",