[CMake] CHECK_TYPE_SIZE works incorrectly with LDFLAGS="-Wl, --gc-sections"

[Bill Hoffman]

Arfrever Frehtes Taifersar Arahesis wrote:
> 2008-08-05 00:01:51 Bill Hoffman napisał(a):
>> Arfrever Frehtes Taifersar Arahesis wrote:
>>> CHECK_TYPE_SIZE returns incorrect (empty) values of types sizes when
>>> the LDFLAGS variable contains "-Wl,--gc-sections".
>>>
>>> This bug causes compilation failures in probably all packages which
>>> use CHECK_TYPE_SIZE.
>>>
>>> I'm attaching 2 files which help to reproduce this bug.
>>>
>>> Steps to reproduce:
>>> 1. Save the attachments to ${PROJECT_SOURCE_DIR}
>>> 2. Run: export LDFLAGS="-Wl,--gc-sections"
>>> 3. Run: cmake ${PROJECT_SOURCE_DIR}
>>> 4. Read ${PROJECT_BINARY_DIR}/config.h
>>>
>>> I use CMake 2.6.0.
>>>
>> What is in the CMakeError.log?
> 
> CMakeFiles/CMakeError.log doesn't exist.
> 
>> Why is it failing?
> 
> Maybe CMake uses wrong way of checking type sizes which relies on
> incorrect assumptions.
> I wrote steps to reproduce this bug so you should be able to confirm it.
> 
Can you do a find in your build tree and find CMakeError.log?

-Bill