https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95149
Bug ID: 95149
Summary: lex.c:1729:8: warning: result of comparison against a
string literal is unspecified (use an explicit string
comparison function instead) [-Wstring-compare]
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jason at gcc dot gnu.org, nathan at gcc dot gnu.org
Target Milestone: ---
I see the following Clang warnings for lex.c. It comes from:
1729: BUF_APPEND ("\\", 1);
#define BUF_APPEND(STR,LEN) \
do { \
bufring_append (pfile, (const uchar *)(STR), (LEN), \
&first_buff, &last_buff); \
total_len += (LEN); \
if (__builtin_expect (temp_buffer_len < 17, 0) \
&& (const uchar *)(STR) != base \
&& (LEN) <= 2) \
{ \
memcpy (temp_buffer + temp_buffer_len, \
(const uchar *)(STR), (LEN)); \
temp_buffer_len += (LEN); \
} \
} while (0)
If I see correctly the problematic comparison is '(const uchar *)(STR) != base'
which is really a comparison in between a string literal and a local variable.
