On Thu, Oct 29, 2015 at 4:00 AM, Richard Earnshaw
<richard.earns...@foss.arm.com> wrote:
> On 23/10/15 13:34, H.J. Lu wrote:
>> On Fri, Oct 23, 2015 at 4:54 AM, Marcus Shawcroft
>> <marcus.shawcr...@gmail.com> wrote:
>>> Hi,
>>>
>>> This patch breaks the distinction between build and host. For example
>>> consider a configure along these lines:
>>>
>>> ./configure --host=aarch64-none-linux-gnu
>>> --target=aarch64-none-linux-gnu --build=x86_64-pc-linux-gnu
>>>
>>> Will result in:
>>>
>>> CXX_FOR_BUILD='g++'
>>> CXX='aarch64-none-linux-gnu-g++'
>>>
>>> the gcc/configure fragment:
>>>
>>> +# Check if -no-pie works.
>>> +AC_CACHE_CHECK([for -no-pie option],
>>> + [gcc_cv_no_pie],
>>> + [saved_LDFLAGS="$LDFLAGS"
>>> + LDFLAGS="$LDFLAGS -no-pie"
>>> + AC_LINK_IFELSE([int main(void) {return 0;}],
>>> + [gcc_cv_no_pie=yes],
>>> + [gcc_cv_no_pie=no])
>>> + LDFLAGS="$saved_LDFLAGS"])
>>> +if test "$gcc_cv_no_pie" = "yes"; then
>>> + NO_PIE_FLAG="-no-pie"
>>> +fi
>>> +AC_SUBST([NO_PIE_FLAG])
>>>
>>> will check if CXX supports -no-pic and set NO_PIE_FLAG accordingly.
>>> The gcc/Makefile.in fragment:
>>>
>>> @@ -761,6 +769,7 @@ BUILD_LINKERFLAGS = $(BUILD_CXXFLAGS)
>>>
>>> # Native linker and preprocessor flags. For x-fragment overrides.
>>> BUILD_LDFLAGS=@BUILD_LDFLAGS@
>>> +BUILD_LDFLAGS += @NO_PIE_FLAG@
>>>
>>> constructs the flags which will ultimately be used to compile the
>>> build machines gen* programs. That compilation uses CXX_FOR_BUILD
>>> with the NO_PIE_FLAG that was originally probed for CXX. This is
>>> incorrect if CXX_FOR_BUILD != CXX
>>>
>>> HJ, could you take a look into this issue?
>>>
>>
>> Try this.
>>
>
> Where's the ChangeLog?
>
You can follow up here:
https://gcc.gnu.org/ml/gcc-patches/2015-10/msg02468.html
--
H.J.
