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Fake __has_include handling

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cctools for MacOS 10.14 (at least) unconditionally uses the
__has_include preprocessor directive (i.e. without checking
  if defined __has_include
as normally suggested for portable code).  So we need to handle
it a little bit.  For now we simply say "nope" aka evaluate to 0.
This commit is contained in:
Michael Matz
2020-05-09 00:39:45 +02:00
parent 34a5658564
commit c16f5d2fe6
2 changed files with 20 additions and 2 deletions
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21
tccpp.c
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@@ -1450,6 +1450,7 @@ static int expr_preprocess(void)
pp_expr = 1;
while (tok != TOK_LINEFEED && tok != TOK_EOF) {
next(); /* do macro subst */
redo:
if (tok == TOK_DEFINED) {
next_nomacro();
t = tok;
@@ -1467,10 +1468,26 @@ static int expr_preprocess(void)
}
tok = TOK_CINT;
tokc.i = c;
} else if (tok >= TOK_IDENT) {
/* if undefined macro */
} else if (1 && tok == TOK___HAS_INCLUDE) {
next(); /* XXX check if correct to use expansion */
skip('(');
while (tok != ')' && tok != TOK_EOF)
next();
if (tok != ')')
expect("')'");
tok = TOK_CINT;
tokc.i = 0;
} else if (tok >= TOK_IDENT) {
/* if undefined macro, replace with zero, check for func-like */
t = tok;
tok = TOK_CINT;
tokc.i = 0;
tok_str_add_tok(str);
next();
if (tok == '(')
tcc_error("function-like macro '%s' is not defined",
get_tok_str(t, NULL));
goto redo;
}
tok_str_add_tok(str);
}