Earl Chew wrote:
I can't make up my mind whether the new behaviour is incorrect,
or whether the old behaviour should never have been supported.
I'm pretty certain this is a defect because I can construct a
program that should work, but doesn't.
In any case, I've discovered that this was an aberration of
4.1.0, and does not appear in later versions.
Consider foo.cpp:
namespace { extern const char f[]; }
namespace { const char f[] = "abc"; }
const char* g = f;
Expect variable g to be global, but f to have non-global scope.
3.4.2 Pass
4.1.0 Fail
4.1.1 Pass
4.1.2 Fail
************************ 4.1.2 ***************************************
************************ PASS ***************************************
.file "foo.cpp"
.globl g
.data
.align 8
.type g, @object
.size g, 8
g:
.quad _ZN36_GLOBAL__N_foo.cpp_00000000_2B2B2FAE1fE
.section .rodata
.type _ZN36_GLOBAL__N_foo.cpp_00000000_2B2B2FAE1fE, @object
.size _ZN36_GLOBAL__N_foo.cpp_00000000_2B2B2FAE1fE, 4
_ZN36_GLOBAL__N_foo.cpp_00000000_2B2B2FAE1fE:
.string "abc"
.ident "GCC: (GNU) 4.1.2 20070626 (Red Hat 4.1.2-14)"
.section .note.GNU-stack,"",@progbits
************************ 4.1.1 ***************************************
************************ PASS ***************************************
.file "foo.cpp"
.globl g
.data
.align 4
.type g, @object
.size g, 4
g:
.long _ZN36_GLOBAL__N_foo.cpp_00000000_8E53D9441fE
.section .rodata
.type _ZN36_GLOBAL__N_foo.cpp_00000000_8E53D9441fE, @object
.size _ZN36_GLOBAL__N_foo.cpp_00000000_8E53D9441fE, 4
_ZN36_GLOBAL__N_foo.cpp_00000000_8E53D9441fE:
.string "abc"
.ident "GCC: (GNU) 4.1.1 20070105 (Red Hat 4.1.1-51)"
.section .note.GNU-stack,"",@progbits
************************ 4.1.0 ***************************************
************************ FAIL ***************************************
.file "foo.cpp"
.globl _ZN36_GLOBAL__N_foo.cpp_00000000_54D6CB4D1fE
.section .rodata
.type _ZN36_GLOBAL__N_foo.cpp_00000000_54D6CB4D1fE, @object
.size _ZN36_GLOBAL__N_foo.cpp_00000000_54D6CB4D1fE, 4
_ZN36_GLOBAL__N_foo.cpp_00000000_54D6CB4D1fE:
.string "abc"
.globl g
.data
.align 4
.type g, @object
.size g, 4
g:
.long _ZN36_GLOBAL__N_foo.cpp_00000000_54D6CB4D1fE
.ident "GCC: (GNU) 4.1.0"
.section .note.GNU-stack,"",@progbits
************************ 3.4.2 ***************************************
************************ PASS ***************************************
.file "foo.cpp"
.globl _ZN36_GLOBAL__N_foo_cpp_00000000_4C2300AC1fE
.section .rodata
.align 2
.type _ZN36_GLOBAL__N_foo_cpp_00000000_4C2300AC1fE, @object
.size _ZN36_GLOBAL__N_foo_cpp_00000000_4C2300AC1fE, 4
_ZN36_GLOBAL__N_foo_cpp_00000000_4C2300AC1fE:
.string "abc"
.globl g
.section ".data"
.align 2
.type g, @object
.size g, 4
g:
.long _ZN36_GLOBAL__N_foo_cpp_00000000_4C2300AC1fE
.ident "GCC: (GNU) 3.4.2 (mingw-special)"
