https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101546
Bug ID: 101546
Summary: Sporadic issue during compiling a code with a
'--save-temps' option
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: filip.bascarevic at siemens dot com
Target Milestone: ---
Created attachment 51185
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51185&action=edit
Patch file for the --save-temps bug
Dear GCC community,
We saw one problem in a GCC 11.1.0. We faced sporadic issue during compiling a
code with a '--save-temps' option. Generally the gcc.exe creates temporary
files containing all include-paths and call internally cc1.exe but in the gcc
10.2.0 these files have random names but in a gcc 11.1.0 names are not random
(it is .args.0). So during parallel compilation it can happen that the file can
be overwritten. Problematic part of a code is at path "gcc-11.1.0/gcc/gcc.c"
Source :Gcc.c
/* Create a temporary @file name. */
static char *make_at_file (void)
{
static int fileno = 0;
char filename[20];
const char *base, *ext;
if (!save_temps_flag) <- skipped for -save-temps
return make_temp_file (""); <- This function generate a random file name
base = dumpbase;
if (!(base && *base))
base = dumpdir;
if (!(base && *base))
base = "a";
sprintf (filename, ".args.%d", fileno++); <- fixed file name
ext = filename;
if (base == dumpdir && dumpdir_trailing_dash_added)
ext++;
return concat (base, ext, NULL);
}
For us we prepared a fix and it seems it works. If you agree with our solution
you can also apply this patch in a next versions of the GCC. The patch is in
the attachment.
With best regards,
MSc. Filip Bascarevic
Siemens, s.r.o.
ADV D EU CZ AE AC 4
Anglicke nabrezi 2434/1
301 00 Plzen, Czech Republic
filip.bascare...@siemens.com
