[Mingw-cross-env-list] gcc: why disable sjlj and libgomp ?

[Alois Schlögl]

Hi,


I've problems compiling biosig with the recent version of gcc 
(specifically, tinyxml is used for reading some xml files), causing 
these error messages:

win32/libbiosig.a(tinyxml.obj):tinyxml.cpp:(.text+0x4797): undefined 
reference to `___gxx_personality_sj0'
win32/libbiosig.a(tinyxml.obj):tinyxml.cpp:(.text+0x47b0): undefined 
reference to `__Unwind_SjLj_Register'
win32/libbiosig.a(tinyxml.obj):tinyxml.cpp:(.text+0x4860): undefined 
reference to `__Unwind_SjLj_Unregister'
win32/libbiosig.a(tinyxml.obj):tinyxml.cpp:(.text+0x48a4): undefined 
reference to `__Unwind_SjLj_Resume'

The problem goes away when
       --disable-sjlj-exceptions \
is removed from gcc.mk, and mingw-cross-env is rebuilt. I know that the 
change was introduced here
   http://hg.savannah.gnu.org/hgweb/mingw-cross-env/rev/9e757634e635
with the comment "disable SJLJ exceptions explicitly, as those cause 
trouble".

So, I'm wondering what kind of troubles these were, and what kind of 
workaround you would suggest?


   Alois