tests/common/141: Fix build on mingw64

test cases/common/141 c cpp and asm/meson.build

@@ -1,6 +1,7 @@
 project('c cpp and asm', 'c', 'cpp')
 
 cpu = host_machine.cpu_family()
+cc = meson.get_compiler('c')
 
 supported_cpus = ['arm', 'x86', 'x86_64']
 
@@ -12,6 +13,10 @@ if meson.get_compiler('c').get_id() == 'msvc'
   error('MESON_SKIP_TEST MSVC can\'t compile assembly')
 endif
 
+if cc.symbols_have_underscore_prefix()
+  add_project_arguments('-DMESON_TEST__UNDERSCORE_SYMBOL', language: 'c')
+endif
+
 test('test-c-asm', executable('c-asm', ['main.c', 'retval-' + cpu + '.S']))
 test('test-cpp-asm', executable('cpp-asm', ['main.cpp', 'retval-' + cpu + '.S']))
 test('test-c-cpp-asm', executable('c-cpp-asm', ['somelib.c', 'main.cpp', 'retval-' + cpu + '.S']))

test cases/common/141 c cpp and asm/symbol-underscore.h

@@ -1,4 +1,4 @@
-#if defined(__WIN32__) || defined(__APPLE__)
+#if defined(MESON_TEST__UNDERSCORE_SYMBOL)
 # define SYMBOL_NAME(name) _##name
 #else
 # define SYMBOL_NAME(name) name