https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83061
Bug ID: 83061
Summary: -Wmaybe-uninitialized warnings in gcc/lto/lto-object.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Target Milestone: ---
LTO/PGO bootstrap shows:
../../gcc/gcc/lto/lto-object.c: In function ‘lto_obj_append_data’:
../../gcc/gcc/lto/lto-object.c:361:7: warning: ‘err’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
if (err == 0)
^
../../gcc/gcc/lto/lto-object.c:352:7: note: ‘err’ was declared here
int err;
^
../../gcc/gcc/lto/lto-object.c: In function ‘lto_obj_begin_section’:
../../gcc/gcc/lto/lto-object.c:337:7: warning: ‘err’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
if (err == 0)
^
../../gcc/gcc/lto/lto-object.c:324:7: note: ‘err’ was declared here
int err;
^
../../gcc/gcc/lto/lto-object.c:338:14: warning: ‘errmsg’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
fatal_error (input_location, "%s", errmsg);
^
../../gcc/gcc/lto/lto-object.c:323:15: note: ‘errmsg’ was declared here
const char *errmsg;
^
All of the warnings are correct.
include/simple-object.h:
159 /* Add a section to SIMPLE_OBJECT. NAME is the name of the new
160 section. ALIGN is the required alignment expressed as the number
161 of required low-order 0 bits (e.g., 2 for alignment to a 32-bit
162 boundary). The section is created as containing data, readable,
163 not writable, not executable, not loaded at runtime. On error this
164 returns NULL, sets *ERRMSG to an error message, and sets *ERR to an
165 errno value or 0 if there isn't one. */
166
167 extern simple_object_write_section *
168 simple_object_write_create_section (simple_object_write *simple_object,
169 const char *name, unsigned int align,
170 const char **errmsg, int *err);
But libiberty/simple-object.c has:
411 simple_object_write_section *
412 simple_object_write_create_section (simple_object_write *sobj, const char
*name,
413 unsigned int align,
414 const char **errmsg ATTRIBUTE_UNUSED,
415 int *err ATTRIBUTE_UNUSED)
