https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65974
Bug ID: 65974
Summary: Bogus deprecated-declarations warnings for inline
definitions of deprecated virtual methods
Product: gcc
Version: 5.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vz-gcc at zeitlins dot org
Target Milestone: ---
Consider the following example:
% cat -n deprdecl.cpp
1 struct S {
2 void bar();
3
4 __attribute__((deprecated("use bar() instead.")))
5 virtual void foo();
6 };
7
8 inline void S::foo() { bar(); }
9
10 int main()
11 {
12 return 0;
13 }
% g++-5 -c -Wall deprdecl.cpp
deprdecl.cpp:13:1: warning: 'virtual void S::foo()' is deprecated: use
bar() instead. [-Wdeprecated-declarations]
}
^
deprdecl.cpp:8:13: note: declared here
inline void S::foo() { bar(); }
^
I believe this warning shouldn't appear when the deprecated method is just
being defined and not used. Notice that it indeed does not appear if the method
is either not virtual (i.e. remove "virtual" in line 5) or is defined inline
(i.e. move the body from line 8 to line 5). Nor does it appear with 4.9.
Also notice that the warning location is always the last line of the last
function in the file and has nothing to do with the function it complains
about.
This warning may look like not a big deal, but when compiling my real code it
occurs many thousands times making it impossible to use deprecated attribute
with g++ 5.1.
Compiler information:
% g++-5 -v
Using built-in specs.
COLLECT_GCC=g++-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 5.1.1-2'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=c++11 --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 5.1.1 (Debian 5.1.1-2)
