When the attached file is compiled with a mingw32 build of GCC 4.3.0, the
constructor definition for "foo" does not fully override the declaration in the
struct which inherits the dllimport attribute, and a dllimport reference is
incorrectly emitted. The member function "bar()" is provided as an example of
correctly overriding the dllimport declaration; this issue only occurs with
constructors and destructors.
Compilation command line and output:
> g++ -c impoverride.cpp
impoverride.cpp:8: warning: 'foo::foo()' redeclared without dllimport
attribute:
previous dllimport ignored
impoverride.cpp:12: warning: 'void foo::bar()' redeclared without dllimport
attr
ibute: previous dllimport ignored
> nm impoverride.o
00000000 b .bss
00000000 d .data
00000000 t .text
00000011 T __Z3depv
0000000c T __ZN3foo3barEv
00000006 T __ZN3fooC1Ev
00000000 T __ZN3fooC2Ev
U __imp___ZN3fooC1Ev << Shouldn't be there!
> g++ -v
Using built-in specs.
Target: mingw32
Configured with: ../../gcc-4.3.0-ehstatic/configure --prefix=/mingw
--build=ming
w32 --enable-languages=c,c++ --disable-nls --disable-win32-registry
--enable-sjl
j-exceptions --enable-libgomp
--with-gmp=/d/cygdev/gccbuild/libsfor43/debug/gmp-
install --with-mpfr=/d/cygdev/gccbuild/libsfor43/debug/mpfr-install
--with-libic
onv-prefix=/d/cygdev/gccbuild/libsfor43/debug/iconv-install --disable-werror
--e
nable-threads --enable-libstdcxx-debug
--enable-cxx-flags='-fno-function-section
s -fno-data-sections' --disable-symvers
Thread model: win32
gcc version 4.3.0 (GCC)
--
Summary: Con/de-structor definition fails to override dllimport
declaration
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tdragon at tdragon dot net
GCC build triplet: mingw32
GCC host triplet: mingw32
GCC target triplet: mingw32
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35921
