Extended test case for special characters to compiler arguments

test cases/common/145 special characters/arg-char-test.c

@@ -0,0 +1,10 @@
+#include <assert.h>
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+  char c = CHAR;
+  assert(argc == 2);
+  if (c != argv[1][0])
+    fprintf(stderr, "Expected %x, got %x\n", (unsigned int) c, (unsigned int) argv[1][0]);
+  assert(c == argv[1][0]);
+}

test cases/common/145 special characters/arg-string-test.c

@@ -0,0 +1,12 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+  const char *s = CHAR;
+  assert(argc == 2);
+  assert(strlen(s) == 1);
+  if (s[0] != argv[1][0])
+    fprintf(stderr, "Expected %x, got %x\n", (unsigned int) s[0], (unsigned int) argv[1][0]);
+  assert(s[0] == argv[1][0]);
+}

test cases/common/145 special characters/arg-unquoted-test.c

@@ -0,0 +1,17 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#define Q(x) #x
+#define QUOTE(x) Q(x)
+
+int main(int argc, char **argv) {
+  const char *s = QUOTE(CHAR);
+  assert(argc == 2);
+  assert(strlen(s) == 1);
+  if (s[0] != argv[1][0])
+    fprintf(stderr, "Expected %x, got %x\n", (unsigned int) s[0], (unsigned int) argv[1][0]);
+  assert(s[0] == argv[1][0]);
+  // There is no way to convert a macro argument into a character constant.
+  // Otherwise we'd test that as well
+}

test cases/common/145 special characters/meson.build

@@ -35,3 +35,41 @@ gen2 = custom_target('gen2',
   output : 'result2',
   install : true,
   install_dir : get_option('datadir'))
+
+# Test that we can pass these special characters in compiler arguments
+#
+# (this part of the test is crafted so we don't try to use these special
+# characters in filenames or target names)
+#
+# TODO: similar tests needed for languages other than C
+# TODO: add similar test for quote, doublequote, and hash, carefully
+# Re hash, see
+# https://docs.microsoft.com/en-us/cpp/build/reference/d-preprocessor-definitions
+
+special = [
+  ['amp', '&'],
+  ['at', '@'],
+  ['backslash', '\\'],
+  ['dollar', '$'],
+  ['gt', '>'],
+  ['lt', '<'],
+  ['slash', '/'],
+]
+
+cc = meson.get_compiler('c')
+
+foreach s : special
+  args = '-DCHAR="@0@"'.format(s[1])
+  e = executable('arg-string-' + s[0], 'arg-string-test.c', c_args: args)
+  test('arg-string-' + s[0], e, args: s[1])
+
+  args = '-DCHAR=@0@'.format(s[1])
+  e = executable('arg-unquoted-' + s[0], 'arg-unquoted-test.c', c_args: args)
+  test('arg-unquoted-' + s[0], e, args: s[1])
+endforeach
+
+foreach s : special
+  args = '-DCHAR=\'@0@\''.format(s[1])
+  e = executable('arg-char-' + s[0], 'arg-char-test.c', c_args: args)
+  test('arg-char-' + s[0], e, args: s[1])
+endforeach