Thread: How is the PostgreSQL debuginfo file generated

Rui Hai Jiang <ruihaijiang@msn.com> writes:
> I’m wondering how to build the debuginfo package from  the PostgreSQL source.
> For example to generate something like this one :   postgresql91-debuginfo.x86_64.

On platforms where such things exist, that's handled by the packaging
system, not by PG proper.  You should proceed by making a new SRPM
and building RPMs from that.
        regards, tom lane

On 23 November 2017 at 18:38, Rui Hai Jiang wrote: > Hello hackers, > > > > I’m wondering how to build the debuginfo package from the PostgreSQL > source. > > > > For example to generate something like this one : > postgresql91-debuginfo.x86_64. > > > > Is there existing support in the current PostgreSQL Makefiles to generate > such debuginfo? I have searched in the source code and could find anything. > How were the existing debuginfo packages created? > > > When you're building from source, no separate debuginfo is produced. If you build with --enable-debug, the debuginfo is embedded in the binaries. The resulting binaries are very large but not generally any slower. Packaging systems have helper programs that invoke 'strip' (or sometimes objcopy) to split out the debuginfo into a separate file and remove it from the original executable. See https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html and https://fedoraproject.org/wiki/Packaging:Debuginfo?rd=Packaging/Debuginfo . You cannot generally re-create debuginfo to match a given binary package. You'd have to rebuild in an absolutely identical environment: exact same library versions, compiler version, configure flags, etc etc etc. Otherwise you'll get broken/misleading debuginfo. -- Craig Ringer http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services

A little trick： 1. configure with —enable-debug, run “make install”, use this build result as debuginfo 2. then run “make install-strip”, use this result as release However the it is not the regular debuginfo, you still can call gdb with it. Additionally, you can dump the real debuginfo from it later. Craig Ringer 于2017年11月24日 周五10:04写道： > On 23 November 2017 at 18:38, Rui Hai Jiang wrote: > >> Hello hackers, >> >> >> >> I’m wondering how to build the debuginfo package from the PostgreSQL >> source. >> >> >> >> For example to generate something like this one : >> postgresql91-debuginfo.x86_64. >> >> >> >> Is there existing support in the current PostgreSQL Makefiles to generate >> such debuginfo? I have searched in the source code and could find anything. >> How were the existing debuginfo packages created? >> >> >> > When you're building from source, no separate debuginfo is produced. If > you build with --enable-debug, the debuginfo is embedded in the binaries. > The resulting binaries are very large but not generally any slower. > > Packaging systems have helper programs that invoke 'strip' (or sometimes > objcopy) to split out the debuginfo into a separate file and remove it from > the original executable. See > https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html and > https://fedoraproject.org/wiki/Packaging:Debuginfo?rd=Packaging/Debuginfo > . > > You cannot generally re-create debuginfo to match a given binary package. > You'd have to rebuild in an absolutely identical environment: exact same > library versions, compiler version, configure flags, etc etc etc. Otherwise > you'll get broken/misleading debuginfo. > > > -- > Craig Ringer http://www.2ndQuadrant.com/ > PostgreSQL Development, 24x7 Support, Training & Services > -- GaoZengqi pgf00a@gmail.com zengqigao@gmail.com

Thank you for your help. I have tried many ways you suggested. I was not familiar with this area, so I did spend lots of time trying. At last, I found the easiest way to do this is to build a new SRPM package, then build other RPMs from the new SRPM. Thanks a lot, Ruihai ________________________________ From: Tom Lane Sent: Friday, November 24, 2017 12:50:37 AM To: Rui Hai Jiang Cc: pgsql-hackers@postgresql.org Subject: Re: How is the PostgreSQL debuginfo file generated Rui Hai Jiang writes: > I’m wondering how to build the debuginfo package from the PostgreSQL source. > For example to generate something like this one : postgresql91-debuginfo.x86_64. On platforms where such things exist, that's handled by the packaging system, not by PG proper. You should proceed by making a new SRPM and building RPMs from that. regards, tom lane