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Re: GCC 4.8 libcpp Issue...Possibly Related To (FIXED)


On 31 October 2013 13:22, Cyd Haselton wrote:
> Bug submitted, thanks.

Again, please don't top-post on this list.

> Not sure if this is relevant but the symbol table from objdump -x <4.8
> cc1> after adding explicit cast to files.c shows odd characters
>
> *snip*
> 00000000 l    df *ABS*  00000000 c-lang.c
> 00000000 l    df *ABS*  00000000 stub-objc.c
> 00000000 l    df *ABS*  00000000 attribs.c
> 000b2c30 l     F .text  00000038 _ZL7eq_attrPKvS0_
> 000b2c68 l     F .text  00000028 _ZL9hash_attrPKv
> 000b2c90 l     F .text  000000a4 _ZL24find_attribute_namespacePKc
> 000b2d34 l     F .text  00000128
> _ZL25register_scoped_attributePK14attribute_specP17scoped_attributes
> 0099512c l     O .rodata        0000001a
> _ZZL25register_scoped_attributePK14attribute_specP17scoped_attributesE12__FUNCTION__
> 00995148 l     O .rodata        00000018 _ZL21empty_attribute_table
> 00995160 l     O .rodata        00000010
> _ZZ15decl_attributesPP9tree_nodeS0_iE12__FUNCTION__
>
>
> as compared to the working 4.7 version:
>
> *snip*
> 00000000 l    df *ABS*  00000000 c-lang.c
> 00000000 l    df *ABS*  00000000 stub-objc.c
> 00000000 l    df *ABS*  00000000 attribs.c
> 00077450 l     F .text  00000028 hash_attr
> 00077478 l     F .text  0000003c eq_attr
> 0097f858 l     O .rodata        00000013 __FUNCTION__.30676
> 0097f86c l     O .rodata        00000018 empty_attribute_table
> 0097f884 l     O .rodata        00000010 __FUNCTION__.30703

The difference is that GCC 4.8 is compiled with a C++ compiler so the
symbol names are mangled to encode the function signatures, as
required by C++ in order to support function overloading and other
features.


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