Re: [PATCH]: Pass -no_pie on SYSTEMSPEC for darwin11

[IainS <developer@sandoe-acoustics.co.uk>]

Hi Jack,

On 17 Jun 2011, at 03:21, Jack Howarth wrote:

>
>  The gcj compiler needs to pass -no_pie for linkage on darwin11 due  
> to the new -pie
> default of the linker. The attached patch accomplishes this by  
> passing -no_pie on SYSTEMSPEC
> for *-*-darwin[12]*. Since Darwin10 supports -no_pie in its linker,  
> I included it in the
> triplet match to simplify the syntax. Bootstrap and tested on x86_64- 
> apple-darwin11.
> Okay for gcc trunk?
>               Jack
>
> 2011-06-16  Jack Howarth <howarth@bromo.med.uc.edu>
>
> 	* libjava/configure.ac (SYSTEMSPEC): Pass -no_pie for darwin11.
> 	* libjava/configure: Regenerate.


I would like to see some more analysis of what the underlying reasons  
for failure are.

-fpie works fine with darwin 9 and darwin 10 libjava [XCode 3.1.4 and  
3.2.5 respectively, bootstrap w/4.2.1]
(modulo suppressing it when building test-suite  .dylibs *** - which  
is a testsuite options handling issue - not a fundamental problem).

so:

make -k check-target-libjava "RUNTESTFLAGS=--target_board=unix/-fpie\{- 
m32,-m64\} "

passes without regression (re the no pie case) given that pie is  
suppressed for dylibs.

-----

So is your proposed patch a work-around for (as yet unreleased)   
darwin 11 tool-chain bugs or ... ?

Iain

===
****
kludge to suppress pie for for dylibs (use in place of the darwin9.h  
hunk from the attachment on PR49371).

Index: gcc/config/darwin9.h
===================================================================
--- gcc/config/darwin9.h        (revision 175110)
+++ gcc/config/darwin9.h        (working copy)
@@ -35,6 +35,12 @@ along with GCC; see the file COPYING3.  If not see
  /* Tell collect2 to run dsymutil for us as necessary.  */
  #define COLLECT_RUN_DSYMUTIL 1

+#undef PIE_SPEC
+#define PIE_SPEC \
+  "%{fpie|pie|fPIE:  %{!Zdynamiclib: \
+     %{mdynamic-no-pic: %n'-mdynamic-no-pic' overrides '-pie', '- 
fpie' or '-fPIE'; \
+      :-pie}}}"
+
  #undef  ASM_OUTPUT_ALIGNED_COMMON
  #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE,  
ALIGN)             \
    do  
{                                                                 \