Add unit test for cc.preprocess()

test cases/common/255 preprocess/bar.c

@@ -0,0 +1,3 @@
+int bar(void) {
+    return BAR;
+}

test cases/common/255 preprocess/foo.c

@@ -0,0 +1 @@
+#include <foo.h>

test cases/common/255 preprocess/foo.h

@@ -0,0 +1,2 @@
+int bar(void);
+int main(void) { return FOO + bar(); }

test cases/common/255 preprocess/meson.build

@@ -0,0 +1,15 @@
+project('preprocess', 'c')
+
+cc = meson.get_compiler('c')
+
+add_project_arguments(['-DFOO=0', '-DBAR=0'], language: 'c')
+
+pp_files = cc.preprocess('foo.c', 'bar.c', output: '@PLAINNAME@')
+
+foreach f : pp_files
+  message(f.full_path())
+endforeach
+
+subdir('src')
+
+test('test-foo', executable('app', pp_files, link_depends: file_map))

test cases/common/255 preprocess/src/file.map.in

@@ -0,0 +1,3 @@
+#if 1
+Hello World
+#endif

test cases/common/255 preprocess/src/meson.build

@@ -0,0 +1,4 @@
+file_map = cc.preprocess('file.map.in',
+  output: '@BASENAME@',
+  compile_args: ['-x', 'assembler-with-cpp'],
+)