https://gcc.gnu.org/g:bad5acbfa77cfd9e46a3f14e3fd79f0fbd8d4bb6
commit r15-10530-gbad5acbfa77cfd9e46a3f14e3fd79f0fbd8d4bb6 Author: Jonathan Wakely <[email protected]> Date: Tue Nov 18 13:19:53 2025 +0000 c++: Handle absolute path for CMI output directory [PR122677] 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. (cherry picked from commit c1cf465bdbe587b1ccd8feb05b9b3878163708fe) Diff: --- 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 b7e137124b29..8490b64e2330 100644 --- a/gcc/cp/module.cc +++ b/gcc/cp/module.cc @@ -4884,8 +4884,13 @@ 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;
