https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81364
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-07-08
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Another one:
[hjl@gnu-tools-1 tmp]$ cat y.c
#define TST_DO_REC(rec) \
for (rec=0; rec < 10; ++rec)
#define TST_FUNC_ISW \
int \
tst_isw##_func_ (int debug_flg) \
{ \
TST_DO_REC (debug_flg) \
{ \
} \
}
TST_FUNC_ISW
[hjl@gnu-tools-1 tmp]$
/export/build/gnu/gcc-cet/release/usr/gcc-8.0.0-cet/bin/gcc
-Wmultistatement-macros -S y.c
y.c: In function ‘tst_isw_func_’:
y.c:9:3: warning: macro expands to multiple statements
[-Wmultistatement-macros]
{ \
^
y.c:13:1: note: in expansion of macro ‘TST_FUNC_ISW’
TST_FUNC_ISW
^~~~~~~~~~~~
y.c:2:3: note: some parts of macro expansion are not guarded by this ‘for’
clause
for (rec=0; rec < 10; ++rec)
^
y.c:8:3: note: in expansion of macro ‘TST_DO_REC’
TST_DO_REC (debug_flg) \
^~~~~~~~~~
y.c:13:1: note: in expansion of macro ‘TST_FUNC_ISW’
TST_FUNC_ISW
^~~~~~~~~~~~
[hjl@gnu-tools-1 tmp]$
