build: Stop installing libxml.m4

This file is deprecated and unmaintained. It will be kept in the source
tree for a while.

CMakeLists.txt

@@ -682,10 +682,6 @@ endif()
 configure_file(xml2-config.in xml2-config @ONLY)
 install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/xml2-config DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT development)
 
-if(UNIX)
-    install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/libxml.m4 DESTINATION ${CMAKE_INSTALL_DATADIR}/aclocal)
-endif()
-
 set(XML_INCLUDEDIR "-I${CMAKE_INSTALL_FULL_INCLUDEDIR}/libxml2")
 set(XML_LIBDIR "-L${CMAKE_INSTALL_FULL_LIBDIR}")
 

Makefile.am

@@ -110,10 +110,6 @@ endif
 DEPS = libxml2.la
 LDADDS = libxml2.la
 
-
-m4datadir = $(datadir)/aclocal
-dist_m4data_DATA = libxml.m4
-
 runtest_SOURCES=runtest.c
 runtest_DEPENDENCIES = $(DEPS)
 runtest_LDADD= $(BASE_THREAD_LIBS) $(THREAD_LIBS) $(LDADDS)

libxml.m4

@@ -1,6 +1,8 @@
 dnl AM_PATH_XML2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
 dnl Test for XML, and define XML_CPPFLAGS and XML_LIBS
 dnl
+dnl Deprecated and unmaintained. Use pkg-config or xslt-config.
+dnl
 AC_DEFUN([AM_PATH_XML2],[
   m4_warn([obsolete], [AM_PATH_XML2 is deprecated, use PKG_CHECK_MODULES instead])
   AC_REQUIRE([PKG_PROG_PKG_CONFIG])

meson.build

@@ -776,8 +776,6 @@ configure_file(
     install_dir: dir_lib / 'cmake' / 'libxml2',
 )
 
-install_data(files('libxml.m4'), install_dir: dir_data / 'aclocal')
-
 if support_tls == false
     message('===============================================================')
     message('WARNING: Your C compiler appears to not support thread-local')