https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107884
Bug ID: 107884
Summary: H8/300: cp-demangle.c fix warning related demangle.h
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: uaa at mx5 dot nisiq.net
Target Milestone: ---
Created attachment 53973
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53973&action=edit
pack DMGL_* option bit within 16bit width
On building gcc-12.2.0 with newlib-4.1.0 (newlib and libgloss) and
binutils-2.36.1 on Debian-11.5/amd64.
gcc/config/h8300/t-h8300 is modified with:
MULTILIB_OPTIONS = ms/msx mint32
MULTILIB_DIRNAMES = h8300s h8sx int32
to disable building H8 normal mode library.
gcc configuration is:
../configure --target=h8300-unknown-elf --enable-languages=c,c++ \
--prefix=/home/uaa/h8300 --with-newlib --disable-nls --disable-libssp \
--disable-libgomp --disable-libstdcxx-pch \
--disable-libstdcxx-filesystem-ts --with-newlib --disable-wchar_t
include/demangle.h related warning occurs cross-compiled cp-demangle.c,
due to the size of int is 16bit (H8/300 default).
bin/bash ../libtool --tag CC --tag disable-shared --mode=compile
/home/uaa/gcc-12.2.0/h8300-unknown-elf/./gcc/xgcc
-B/home/uaa/gcc-12.2.0/h8300-unknown-elf/./gcc/ -nostdinc
-B/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/newlib/ -isystem
/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/newlib/targ-include
-isystem /home/uaa/gcc-12.2.0/newlib/libc/include
-B/home/uaa/h8300/h8300-unknown-elf/bin/
-B/home/uaa/h8300/h8300-unknown-elf/lib/ -isystem
/home/uaa/h8300/h8300-unknown-elf/include -isystem
/home/uaa/h8300/h8300-unknown-elf/sys-include -DHAVE_CONFIG_H -I..
-I/home/uaa/gcc-12.2.0/libstdc++-v3/../libiberty
-I/home/uaa/gcc-12.2.0/libstdc++-v3/../include
-I/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/libstdc++-v3/include/h8300-unknown-elf
-I/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/libstdc++-v3/include
-I/home/uaa/gcc-12.2.0/libstdc++-v3/libsupc++ -g -O2 -DIN_GLIBCPP_V3
-Wno-error -c cp-demangle.c
libtool: compile: /home/uaa/gcc-12.2.0/h8300-unknown-elf/./gcc/xgcc
-B/home/uaa/gcc-12.2.0/h8300-unknown-elf/./gcc/ -nostdinc
-B/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/newlib/ -isystem
/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/newlib/targ-include
-isystem /home/uaa/gcc-12.2.0/newlib/libc/include
-B/home/uaa/h8300/h8300-unknown-elf/bin/
-B/home/uaa/h8300/h8300-unknown-elf/lib/ -isystem
/home/uaa/h8300/h8300-unknown-elf/include -isystem
/home/uaa/h8300/h8300-unknown-elf/sys-include -DHAVE_CONFIG_H -I..
-I/home/uaa/gcc-12.2.0/libstdc++-v3/../libiberty
-I/home/uaa/gcc-12.2.0/libstdc++-v3/../include
-I/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/libstdc++-v3/include/h8300-unknown-elf
-I/home/uaa/gcc-12.2.0/h8300-unknown-elf/h8300-unknown-elf/libstdc++-v3/include
-I/home/uaa/gcc-12.2.0/libstdc++-v3/libsupc++ -g -O2 -DIN_GLIBCPP_V3 -Wno-error
-c cp-demangle.c -o cp-demangle.o
In file included from cp-demangle.c:139:
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:58:29: warning:
left shift count >= width of type [-Wshift-count-overflow]
58 | #define DMGL_DLANG (1 << 16)
| ^~
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:91:22: note: in
expansion of macro 'DMGL_DLANG'
91 | dlang_demangling = DMGL_DLANG,
| ^~~~~~~~~~
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:59:29: warning:
left shift count >= width of type [-Wshift-count-overflow]
59 | #define DMGL_RUST (1 << 17) /* Rust wraps GNU_V3 style
mangling. */
| ^~
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:92:21: note: in
expansion of macro 'DMGL_RUST'
92 | rust_demangling = DMGL_RUST
| ^~~~~~~~~
cp-demangle.c: In function 'd_function_type':
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:68:34: warning:
left shift count >= width of type [-Wshift-count-overflow]
68 | #define DMGL_NO_RECURSE_LIMIT (1 << 18)
| ^~
cp-demangle.c:2891:22: note: in expansion of macro 'DMGL_NO_RECURSE_LIMIT'
2891 | if ((di->options & DMGL_NO_RECURSE_LIMIT) == 0)
| ^~~~~~~~~~~~~~~~~~~~~
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:68:34: warning:
left shift count >= width of type [-Wshift-count-overflow]
68 | #define DMGL_NO_RECURSE_LIMIT (1 << 18)
| ^~
cp-demangle.c:2916:22: note: in expansion of macro 'DMGL_NO_RECURSE_LIMIT'
2916 | if ((di->options & DMGL_NO_RECURSE_LIMIT) == 0)
| ^~~~~~~~~~~~~~~~~~~~~
cp-demangle.c: In function 'd_demangle_callback':
/home/uaa/gcc-12.2.0/libstdc++-v3/../include/demangle.h:68:34: warning:
left shift count >= width of type [-Wshift-count-overflow]
68 | #define DMGL_NO_RECURSE_LIMIT (1 << 18)
| ^~
cp-demangle.c:6448:19: note: in expansion of macro 'DMGL_NO_RECURSE_LIMIT'
6448 | if (((options & DMGL_NO_RECURSE_LIMIT) == 0)
| ^~~~~~~~~~~~~~~~~~~~~
suggested remedy is attached.
