[arm-gnu] Problem with linking against RVCT-built libs

[Dave Poston <dave@xxxxxxxxxxxxxxx>]

Hi,
   There seems to a problem with arm-none-eabi-gcc when linking against 
RVCT-built libraries. If the libraries contain inline virtual 
destructors, and --start-group, --end-group is used to link them, then 
the linker errors with "xxx.a: could not read symbols: Bad value". 
However linking the library with --whole-archive, or without the 
--start-group/--end-group works fine. Putting the library's object files 
on the link line also works fine.
   Here is a repro case for a windows machine.

myclass.h:
class myclass
{
public:
   virtual ~myclass() {}
};


rvct_inline.cpp:
#include "myclass.h"

void rvct_func()
{
   new myclass;
}

gcc_uselib.cpp:
#include "myclass.h"

extern void rvct_func();

void gcc_func()
{
   rvct_func();
   new myclass;
}

build.bat:
REM Compile rvct_inline.cpp with RVCT, 2.x or 3.x makes no difference
armcc -c  rvct_inline.cpp --no-hide-all

REM Make a library, can use either ar or armar
"C:\Program Files\CodeSourcery\Sourcery G++ 
Lite\bin\arm-none-eabi-ar.exe"  -cr librvct.a rvct_inline.o
REM This works fine
"C:\Program Files\CodeSourcery\Sourcery G++ 
Lite\bin\arm-none-eabi-gcc.exe" gcc_uselib.cpp  -L. -lrvct -lc -lm 
-lstdc++ -shared
REM So does this
"C:\Program Files\CodeSourcery\Sourcery G++ 
Lite\bin\arm-none-eabi-gcc.exe" gcc_uselib.cpp  -L. rvct_inline.o -lc 
-lm -lstdc++ -shared

REM This fails with 'could not read symbols: bad value'
"C:\Program Files\CodeSourcery\Sourcery G++ 
Lite\bin\arm-none-eabi-gcc.exe" gcc_uselib.cpp  -L. -Wl,--start-group 
-lrvct -Wl,--end-group -lc -lm -lstdc++ -shared
REM But this works again
"C:\Program Files\CodeSourcery\Sourcery G++ 
Lite\bin\arm-none-eabi-gcc.exe" gcc_uselib.cpp  -L. -Wl,--start-group 
-Wl,--whole-archive -lrvct -Wl,--no-whole-archive  -Wl,--end-group -lc 
-lm -lstdc++ -shared