<html><body> Yes, The default user space for RHEL 5 and SLES10 is 32bit, but we always build 64bit crash since PPC64 support is added. Top level makefile should have something like: ifeq (${TARGET}, PPC64) CONF_FLAGS = -m64 endif So, this change has to be modified to support cross-compile. Thanks Haren <img width="16" height="16" src="cid:1__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for "Seymour, Shane M" ---06/26/2012 05:32:47 PM---"Seymour, Shane M" <shane.seymour@hp.com>">"Seymour, Shane M" ---06/26/2012 05:32:47 PM---"Seymour, Shane M" <shane.seymour@hp.com> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top"><td style="background-image:url(cid:2__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com); background-repeat: no-repeat; " width="40%"> <ul style="padding-left: 72pt">"Seymour, Shane M" <shane.seymour@hp.com> Sent by: crash-utility-bounces@redhat.com 06/26/2012 05:25 PM <table border="1"> <tr valign="top"><td width="168" bgcolor="#FFFFFF"><div align="center">Please respond to "Discussion list for crash utility usage, maintenance and development" <crash-utility@redhat.com></div></td></tr> </table> </ul> </td><td width="60%"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top"><td width="1%"><img width="58" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> <div align="right">To</div></td><td width="100%"><img width="1" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> <ul style="padding-left: 7pt">"Discussion list for crash utility usage, maintenance and development" <crash-utility@redhat.com></ul> </td></tr> <tr valign="top"><td width="1%"><img width="58" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> <div align="right">cc</div></td><td width="100%"><img width="1" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> </td></tr> <tr valign="top"><td width="1%"><img width="58" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> <div align="right">Subject</div></td><td width="100%"><img width="1" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""> <ul style="padding-left: 7pt">Re: [Crash-utility] PPC64 compiler question</ul> </td></tr> </table> <table border="0" cellspacing="0" cellpadding="0"> <tr valign="top"><td width="58"><img width="1" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""></td><td width="336"><img width="1" height="1" src="cid:3__=08BBF0B9DF85481F8f9e8a93df938@us.ibm.com" border="0" alt=""></td></tr> </table> </td></tr> </table> <tt>The default for RHEL5 is 32bit: </tt><tt><a href="http://www.ibm.com/developerworks/wikis/display/LinuxP/Performance+FAQs#PerformanceFAQs-WhyistheRHEL5defaultforapplications32bitandtheSLES11default64bit%3F">http://www.ibm.com/developerworks/wikis/display/LinuxP/Performance+FAQs#PerformanceFAQs-WhyistheRHEL5defaultforapplications32bitandtheSLES11default64bit%3F</a></tt><tt> The default for RHEL6 presumably changed to be 64bit like SLES11. To quote big blue (when talking about RHEL5): "It is logical that the next version of RHEL would likely move to a 64-bit default." -----Original Message----- From: crash-utility-bounces@redhat.com [</tt><tt><a href="mailto:crash-utility-bounces@redhat.com">mailto:crash-utility-bounces@redhat.com</a></tt><tt>] On Behalf Of Dave Anderson Sent: Tuesday, June 26, 2012 11:23 PM To: Discussion list for crash utility usage, maintenance and development Subject: [Crash-utility] PPC64 compiler question While doing some testing I ran into a surprising crash-build bug on ppc64, where on a RHEL5 ppc64 host, a simple "make" command would build a 32-bit PPC crash utility. But on RHEL6, it built as 64-bit PPC64 crash utility as expected. (This was due to a crash-6.0.3 change to support "make target=PPC" on a ppc64 host). Anyway, the reason is that in the RHEL5 environment, if an application is compiled without specifying -m32 or -m64, it builds a 32-bit binary, whereas on RHEL6 it builds a 64-bit binary by default: RHEL5: # cat doit.c main() {} # gcc doit.c # file a.out a.out: ELF 32-bit MSB executable, PowerPC or cisco 4500, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), not stripped # gcc --version gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-52) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # uname -r 2.6.18-308.el5 # RHEL6: # cat doit.c main() {} # gcc doit.c # file a.out a.out: ELF 64-bit MSB executable, 64-bit PowerPC or cisco 7500, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped # gcc --version gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3) Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # uname -r 2.6.32-220.el6.ppc64 # What controls that? Is it the compiler, some environment setting, or what? Dave -- Crash-utility mailing list Crash-utility@redhat.com </tt><tt><a href="https://www.redhat.com/mailman/listinfo/crash-utility">https://www.redhat.com/mailman/listinfo/crash-utility</a></tt><tt> -- Crash-utility mailing list Crash-utility@redhat.com </tt><tt><a href="https://www.redhat.com/mailman/listinfo/crash-utility">https://www.redhat.com/mailman/listinfo/crash-utility</a></tt><tt> </tt> </body></html>