When trying to create each directory component of an absolute path, the
first call to mkdir uses a path of "" which gives an ENOENT error. This
causes the create_dirs function to return without creating anything.
This commit skips past the leading slashes of an absolute path, so that
the first call to mkdir is for an actual directory name, not an empty
string.
gcc/cp/ChangeLog:
PR c++/122677
* module.cc (create_dirs): Skip past any leading slashes.
---
As discussed in the PR, this is difficult to test because we don't
really want the testsuite creating directories in hardcoded absolute
paths like /tmp/gcm.cache and it's not trivial to pass the absolute path
of the build directory to the test (and then have that directory removed
again afterwards). But this has been manually tested with absolute paths
and it fixes the bug. The rest of the testsuite was run on x86_64-linux.
OK for trunk? Is it needed for gcc-15 too?
gcc/cp/module.cc | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
index 017bacdf2231..40f592b7a2ff 100644
--- a/gcc/cp/module.cc
+++ b/gcc/cp/module.cc
@@ -4941,8 +4941,13 @@ maybe_add_cmi_prefix (const char *to, size_t *len_p =
NULL)
static void
create_dirs (char *path)
{
+ char *base = path;
+ /* Skip past initial slashes of absolute path. */
+ while (IS_DIR_SEPARATOR (*base))
+ base++;
+
/* Try and create the missing directories. */
- for (char *base = path; *base; base++)
+ for (; *base; base++)
if (IS_DIR_SEPARATOR (*base))
{
char sep = *base;
--
2.51.1
