From 38f6fee86defebc6ccbc68c21ff857f6111ed874 Mon Sep 17 00:00:00 2001
From: Nirbheek Chauhan <nirbheek@centricular.com>
Date: Wed, 23 Nov 2016 21:34:48 +0530
Subject: [PATCH] Test that g++ and Clang++ can compile assembly

When there's no C compiler available
---
 test cases/common/127 cpp and asm/meson.build    | 16 ++++++++++++++++
 test cases/common/127 cpp and asm/retval-arm.S   |  8 ++++++++
 test cases/common/127 cpp and asm/retval-x86.S   |  8 ++++++++
 .../common/127 cpp and asm/retval-x86_64.S       |  8 ++++++++
 .../common/127 cpp and asm/symbol-underscore.h   |  5 +++++
 test cases/common/127 cpp and asm/trivial.cc     | 16 ++++++++++++++++
 6 files changed, 61 insertions(+)
 create mode 100644 test cases/common/127 cpp and asm/meson.build
 create mode 100644 test cases/common/127 cpp and asm/retval-arm.S
 create mode 100644 test cases/common/127 cpp and asm/retval-x86.S
 create mode 100644 test cases/common/127 cpp and asm/retval-x86_64.S
 create mode 100644 test cases/common/127 cpp and asm/symbol-underscore.h
 create mode 100644 test cases/common/127 cpp and asm/trivial.cc

diff --git a/test cases/common/127 cpp and asm/meson.build b/test cases/common/127 cpp and asm/meson.build
new file mode 100644
index 000000000..55c3d3c6f
--- /dev/null
+++ b/test cases/common/127 cpp and asm/meson.build	
@@ -0,0 +1,16 @@
+project('c++ and assembly test', 'cpp')
+
+sources = ['trivial.cc']
+# If the compiler cannot compile assembly, don't use it
+if meson.get_compiler('cpp').get_id() != 'msvc'
+  cpu = host_machine.cpu_family()
+  sources += ['retval-' + cpu + '.S']
+  cpp_args = ['-DUSE_ASM']
+  message('Using ASM')
+else
+  cpp_args = ['-DNO_USE_ASM']
+endif
+
+exe = executable('trivialprog', sources,
+  cpp_args : cpp_args)
+test('runtest', exe)
diff --git a/test cases/common/127 cpp and asm/retval-arm.S b/test cases/common/127 cpp and asm/retval-arm.S
new file mode 100644
index 000000000..8b3719765
--- /dev/null
+++ b/test cases/common/127 cpp and asm/retval-arm.S	
@@ -0,0 +1,8 @@
+#include "symbol-underscore.h"
+
+.text
+.globl SYMBOL_NAME(get_retval)
+
+SYMBOL_NAME(get_retval):
+	mov	r0, #0
+	mov	pc, lr
diff --git a/test cases/common/127 cpp and asm/retval-x86.S b/test cases/common/127 cpp and asm/retval-x86.S
new file mode 100644
index 000000000..06bd75c28
--- /dev/null
+++ b/test cases/common/127 cpp and asm/retval-x86.S	
@@ -0,0 +1,8 @@
+#include "symbol-underscore.h"
+
+.text
+.globl SYMBOL_NAME(get_retval)
+
+SYMBOL_NAME(get_retval):
+	xorl	%eax, %eax
+	retl
diff --git a/test cases/common/127 cpp and asm/retval-x86_64.S b/test cases/common/127 cpp and asm/retval-x86_64.S
new file mode 100644
index 000000000..638921e3e
--- /dev/null
+++ b/test cases/common/127 cpp and asm/retval-x86_64.S	
@@ -0,0 +1,8 @@
+#include "symbol-underscore.h"
+
+.text
+.globl SYMBOL_NAME(get_retval)
+
+SYMBOL_NAME(get_retval):
+	xorl	%eax, %eax
+	retq
diff --git a/test cases/common/127 cpp and asm/symbol-underscore.h b/test cases/common/127 cpp and asm/symbol-underscore.h
new file mode 100644
index 000000000..508cf50c5
--- /dev/null
+++ b/test cases/common/127 cpp and asm/symbol-underscore.h	
@@ -0,0 +1,5 @@
+#if defined(__WIN32__) || defined(__APPLE__)
+# define SYMBOL_NAME(name) _##name
+#else
+# define SYMBOL_NAME(name) name
+#endif
diff --git a/test cases/common/127 cpp and asm/trivial.cc b/test cases/common/127 cpp and asm/trivial.cc
new file mode 100644
index 000000000..d2928c0c9
--- /dev/null
+++ b/test cases/common/127 cpp and asm/trivial.cc	
@@ -0,0 +1,16 @@
+#include<iostream>
+
+extern "C" {
+  int get_retval(void);
+}
+
+int main(int argc, char **argv) {
+  std::cout << "C++ seems to be working." << std::endl;
+#if defined(USE_ASM)
+  return get_retval();
+#elif defined(NO_USE_ASM)
+  return 0;
+#else
+  #error "Forgot to pass asm define"
+#endif
+}