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Bug 2159759 - [RHEL 9] Perl .ph files are broken on rhel9
Summary: [RHEL 9] Perl .ph files are broken on rhel9
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: perl
Version: 9.1
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: rc
: ---
Assignee: Jitka Plesnikova
QA Contact: Martin Kyral
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-01-10 15:55 UTC by Jitka Plesnikova
Modified: 2023-05-09 09:20 UTC (History)
5 users (show)

Fixed In Version: perl-5.32.1-480.el9
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 2152012
Environment:
Last Closed: 2023-05-09 07:52:09 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-144705 0 None None None 2023-01-10 15:58:21 UTC
Red Hat Product Errata RHBA-2023:2372 0 None None None 2023-05-09 07:52:10 UTC

Description Jitka Plesnikova 2023-01-10 15:55:31 UTC 
+++ This bug was initially created as a clone of Bug #2152012 +++

Description of problem:

Perl .ph files are pretty broken on rhel8.  Almost any attempt to use them produces a confusing warning about _FORTIFY_SOURCE and compiling with optimization (even when nothing is being compiled).


Version-Release number of selected component (if applicable):


How reproducible:

Package - perl-5.32.1-471.module+el8.6.0+13324+628a2397.x86_64.rpm


Steps to Reproduce:


rhel8test04.nyc|psc:~[13:53](2093) $ perl -e 'require "features.ph"'
_FORTIFY_SOURCE requires compiling with optimization (-O) at /usr/lib64/perl5/features.ph line 207.

Another reproducer:

rhel8test04.nyc|psc:~[13:55](2095) $ perl -e 'require "sys/ioctl.ph"'
_FORTIFY_SOURCE requires compiling with optimization (-O) at /usr/lib64/perl5/features.ph line 207.


Actual results:

The normal usecase where we encountered this was ...


require "sys/ioctl.ph"; # for TIOCGWINSZ
Lots of .ph files require features.ph, and they are all affected similarly.  Another example is sys/socket.ph.
.ph files are intended to obtain constants (like TIOCGWINSZ) that are defined in C .h headers. So, we think this is a normal usecase.



Additional info:


Perl .ph files are automatic, mechanical translations of C .h files, and are intended to provide access to C constants in Perl code.  The fortify.h header includes a test to ensure that -O is used when compiling with _FORTIFY_SOURCE, and the header looks for OPTIMIZE, which is set by the compiler whenever -O is used.  Perl translates this test to the .ph file, but nothing ever sets OPTIMIZE  when Perl runs, because nothing is being compiled!  This causes a warning for anything that uses features.ph.  


As a hacky workaround, we could patch anything that uses an affected .ph module to set OPTIMIZE. But that could be a good number of scripts.

--- Additional comment from Jitka Plesnikova on 2022-12-12 11:38:32 UTC ---

Thanks for the report. I am able to reproduce the issue. I will investigate what is wrong.

--- Additional comment from Jitka Plesnikova on 2022-12-15 14:54:46 UTC ---

_FORTIFY_SOURCE is defined in /usr/lib64/perl5/_h2ph_pre.ph which is generated by h2ph. It uses value of @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'}. It does not contains definition for OPTIMIZE. 

The workaround could be to add line below to _h2ph_pre.ph
unless (defined &__OPTIMIZE__) { sub __OPTIMIZE__() { 2 } }

I try to update h2ph to add definition of OPTIMIZE if it is listed in ccflags.
Comment 8 errata-xmlrpc 2023-05-09 07:52:09 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (perl bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2372
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