vcpkg(mfx-dispatch): pre-run libtoolize before autoreconf for autotools 1.17+

res/vcpkg/mfx-dispatch/portfile.cmake

@@ -18,17 +18,26 @@ vcpkg_from_github(
         ${MISSING_CSTDINT_IMPORT_PATCH}
 )
 
-# autotools 1.17+ (Debian 13, Ubuntu 24.04+) doesn't trace the deprecated
-# `AC_PROG_LIBTOOL` for libtoolize, so the libtool m4 macros never get pulled
-# in and automake fails with "Libtool library used but 'LIBTOOL' is undefined".
-# Swap to the modern `LT_INIT` macro at extract time so this works on any
-# distro. No-op on hosts that already have AC_PROG_LIBTOOL working.
-if(EXISTS "${SOURCE_PATH}/configure.ac")
-    file(READ "${SOURCE_PATH}/configure.ac" _mfx_configure_ac)
-    string(REPLACE "AC_PROG_LIBTOOL" "LT_INIT" _mfx_configure_ac_patched "${_mfx_configure_ac}")
-    if(NOT _mfx_configure_ac STREQUAL _mfx_configure_ac_patched)
-        file(WRITE "${SOURCE_PATH}/configure.ac" "${_mfx_configure_ac_patched}")
-        message(STATUS "mfx-dispatch: replaced AC_PROG_LIBTOOL with LT_INIT for autotools >= 1.17")
+# mfx_dispatch's configure.ac uses LT_INIT, but autoreconf 1.17+ (Debian 13,
+# Ubuntu 24.04+) sometimes fails to trace it -- reporting "not using Libtool"
+# and skipping libtoolize. When libtoolize doesn't run, libtool's m4 macros
+# never get installed into the source tree, and automake then fails with
+# "Libtool library used but 'LIBTOOL' is undefined" on Makefile.am:7.
+#
+# Force libtoolize to run before autoreconf so the m4 macros are guaranteed
+# to be present regardless of autoreconf's introspection result.
+if(NOT VCPKG_TARGET_IS_WINDOWS OR VCPKG_TARGET_IS_MINGW)
+    find_program(LIBTOOLIZE NAMES libtoolize glibtoolize)
+    if(LIBTOOLIZE)
+        message(STATUS "mfx-dispatch: pre-running libtoolize to install libtool m4 macros")
+        file(MAKE_DIRECTORY "${SOURCE_PATH}/m4")
+        vcpkg_execute_required_process(
+            COMMAND "${LIBTOOLIZE}" --force --copy --install
+            WORKING_DIRECTORY "${SOURCE_PATH}"
+            LOGNAME "libtoolize-${TARGET_TRIPLET}"
+        )
+    else()
+        message(WARNING "libtoolize not found; mfx-dispatch build is likely to fail")
     endif()
 endif()