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Added a gcc preprocessor options -P, -P1

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tcc -E -P
  do not output a #line directive, a gcc compatible option

tcc -E -P1
  don't follow a gcc preprocessor style and do output a standard
  #line directive. In such case we don't lose a location info when
  we going to compile a resulting file wtith a compiler not
  understanding a gnu style line info.
This commit is contained in:
seyko
2015-03-03 14:19:14 +03:00
parent 40418f87c7
commit 50cdccf3ef
4 changed files with 46 additions and 10 deletions
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44
tccpp.c
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@ -3133,6 +3133,26 @@ ST_FUNC void preprocess_new(void)
}
}
static void line_macro_output(BufferedFile *f, const char *s, TCCState *s1)
{
switch (s1->Pflag) {
case LINE_MACRO_OUTPUT_FORMAT_STD:
/* "tcc -E -P1" case */
fprintf(s1->ppfp, "# line %d \"%s\"\n", f->line_num, f->filename);
break;
case LINE_MACRO_OUTPUT_FORMAT_NONE:
/* "tcc -E -P" case: don't output a line directive */
break;
case LINE_MACRO_OUTPUT_FORMAT_GCC:
default:
/* "tcc -E" case: a gcc standard by default */
fprintf(s1->ppfp, "# %d \"%s\"%s\n", f->line_num, f->filename, s);
break;
}
}
/* Preprocess the current file */
ST_FUNC int tcc_preprocess(TCCState *s1)
{
@ -3158,6 +3178,8 @@ ST_FUNC int tcc_preprocess(TCCState *s1)
if (tok == TOK_EOF) {
break;
} else if (file != file_ref) {
if (file_ref)
line_macro_output(file_ref, "", s1);
goto print_line;
} else if (tok == TOK_LINEFEED) {
if (!token_seen)
@ -3166,18 +3188,20 @@ ST_FUNC int tcc_preprocess(TCCState *s1)
token_seen = 0;
} else if (!token_seen) {
d = file->line_num - file->line_ref;
if (file != file_ref || d < 0 || d >= 8) {
if (file != file_ref || d >= 8) {
print_line:
iptr_new = s1->include_stack_ptr;
s = iptr_new > iptr ? " 1"
: iptr_new < iptr ? " 2"
: iptr_new > s1->include_stack ? " 3"
: ""
;
iptr = iptr_new;
fprintf(s1->ppfp, "# %d \"%s\"%s\n", file->line_num, file->filename, s);
s = "";
if (tcc_state->Pflag == LINE_MACRO_OUTPUT_FORMAT_GCC) {
iptr_new = s1->include_stack_ptr;
s = iptr_new > iptr ? " 1"
: iptr_new < iptr ? " 2"
: iptr_new > s1->include_stack ? " 3"
: ""
;
}
line_macro_output(file, s, s1);
} else {
while (d)
while (d > 0)
fputs("\n", s1->ppfp), --d;
}
file->line_ref = (file_ref = file)->line_num;