meson.build: adapt to alloca removal

meson.build

@@ -93,9 +93,7 @@ config.set('WITH_LIBIDN', enable_runtime == 'libidn')
 config.set('ENABLE_BUILTIN', enable_builtin)
 config.set('HAVE_UNISTD_H', cc.check_header('unistd.h'))
 config.set('HAVE_STDINT_H', cc.check_header('stdint.h'))
-config.set('HAVE_ALLOCA_H', cc.check_header('alloca.h'))
 config.set('HAVE_DIRENT_H', cc.check_header('dirent.h'))
-config.set('HAVE_ALLOCA', cc.has_function('alloca'))
 config.set('HAVE_STRNDUP', cc.has_function('strndup'))
 config.set('HAVE_CLOCK_GETTIME', cc.has_function('clock_gettime'))
 config.set('HAVE_FMEMOPEN', cc.has_function('fmemopen'))
@@ -127,9 +125,6 @@ if cc.get_id() == 'msvc'
       add_project_arguments('-Dsnprintf=_snprintf', language: 'c')
     endif
   endif
-  if cc.has_header_symbol('malloc.h', '_alloca')
-    add_project_arguments('-Dalloca=_alloca', language: 'c')
-  endif
 endif
 
 subdir('include')

tests/meson.build

@@ -30,12 +30,15 @@ if enable_builtin
   tests += ['test-is-public-builtin', 'test-registrable-domain']
 endif
 
+libtestcommon = static_library('testcommon', 'common.c',
+  build_by_default: false)
+
 foreach test_name : tests
   sources = [test_name + '.c', 'common.c', 'common.h']
   exe = executable(test_name, sources,
     build_by_default: false,
     c_args : tests_cargs,
-    link_with : libpsl,
+    link_with : [libpsl, libtestcommon],
     include_directories : configinc,
     link_language : link_language,
     dependencies : [libpsl_dep, networking_deps])