I tried to compile mod_perl-1.28 with perl maint.
20512 (http://www.iki.fi/jhi/[EMAIL PROTECTED]). I had a
build failure (different errors each time trying to
build).
I noticed the following messages during perl
Makefile.PL:
<MESSAGE>
..
+ id: Perl/v5.8.1 (linux)
[/nfs/private/user/srdas/i686/perl-pre-rc5/bin/perl]
Modification of a read-only value attempted at
/nfs/private/user/srdas/tech_stack/mod_perl-1.28/lib/Apache/ExtUtils.pm
line 50.
BEGIN failed--compilation aborted at
./modules/perl/perl_config line 6.
Modification of a read-only value attempted at
/nfs/private/user/srdas/tech_stack/mod_perl-1.28/lib/Apache/ExtUtils.pm
line 50.
BEGIN failed--compilation aborted at
./modules/perl/perl_config line 6.
Modification of a read-only value attempted at
/nfs/private/user/srdas/tech_stack/mod_perl-1.28/lib/Apache/ExtUtils.pm
line 50.
BEGIN failed--compilation aborted at
./modules/perl/perl_config line 6.
</MESSAGE>
Digging through, the following in Apache/ExtUtils.pm
seem to be the problem:
sub Config_pm_fixup {
....
local $_ = $Config::Config{$key};
$sub->();
..
I could reproduce this using a small script:
$ cat repeat.pl
my $max_count = $ARGV[0] || 100;
while ($count++ <= $max_count)
{
$ret = system("./oops.pl");
if ($ret)
{
warn "#$count: Errored\n"; <STDIN>;
}
}
$ cat oops.pl
#!perl
test('data');
sub test { replace() for (@_); }
sub replace
{
my %hash = (
ld => sub { s/(.*)/T1/e },
ccdlflags => sub { s/(.*)/T2/; },
);
while (my($key, $sub) = each %hash)
{
local $_ = 'test';
$sub->();
}
}
-------------------
I ran it as:
$ perl ~/repeat.pl
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#3: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#5: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#6: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#7: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#8: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#12: Errored
Modification of a read-only value attempted at
/home/srdas/junk line 16.
#13: Errored
------------------
1) The script ran perfectly fine on 5.6.1, 5.8.0 and
also on 5.8.1 RC4
2) This looks similar to bug # 23238
(http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2003-08/msg00518.html)
3) local *_ before the local $_ in Apache/ExtUtils.pm
(or in the test script) solves the problem.
For whatever is worth, this is the above diff:
diff -u lib/Apache/ExtUtils.pm.org
lib/Apache/ExtUtils.pm
--- lib/Apache/ExtUtils.pm.org Thu Aug 7 06:46:12
2003
+++ lib/Apache/ExtUtils.pm Thu Aug 7 06:43:36
2003
@@ -47,6 +47,7 @@
);
while (my($key, $sub) = each %config_fixups) {
+ local *_;
local $_ = $Config::Config{$key};
$sub->();
(tied %Config::Config)->{$key} = $_;
---------------------------------------------------
Now since this was working until RC4, I'd consider
this a bug. Should this go over to perl5-porters ?
thx
Sreeji
-------------
For completeness, I've attached my perl-details.
________________________________________________________________________
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Messenger http://uk.messenger.yahoo.com/Summary of my perl5 (revision 5.0 version 8 subversion 1) configuration:
Platform:
osname=linux, osvers=2.4.9-e.18smp, archname=i686-linux-thread-multi
uname='linux ap631wgs 2.4.9-e.18smp #1 smp fri apr 11 18:24:51 edt 2003 i686
unknown '
config_args='-de -Dprefix=//nfs/private/user/srdas/i686/perl-pre-rc5
-Dmake=/usr/bin/make -Dbin=/nfs/private/user/srdas/i686/perl-pre-rc5/bin/
-Uinstallusrbinperl -Dusethreads
-Dstartperl=#!/nfs/private/user/srdas/i686/perl-pre-rc5/bin/perl
-Dinc_version_list=none -Dscriptdir=//nfs/private/user/srdas/i686/perl-pre-rc5/bin
-Dsitebin=/nfs/private/user/srdas/i686/perl-pre-rc5/bin -Doptimize=-O2'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-fno-strict-aliasing -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-I/usr/include/gdbm',
optimize='-O2',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -fno-strict-aliasing
-I/usr/local/include -I/usr/include/gdbm'
ccversion='', gccversion='2.96 20000731 (Red Hat Linux 7.2 2.96-108.1)',
gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=/lib/libc-2.2.4.so, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.2.4'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL_IMPLICIT_CONTEXT
Locally applied patches:
MAINT20511
Built under linux
Compiled at Aug 7 2003 00:19:15
@INC:
//nfs/private/user/srdas/i686/perl-pre-rc5/lib/5.8.1/i686-linux-thread-multi
//nfs/private/user/srdas/i686/perl-pre-rc5/lib/5.8.1
//nfs/private/user/srdas/i686/perl-pre-rc5/lib/site_perl/5.8.1/i686-linux-thread-multi
//nfs/private/user/srdas/i686/perl-pre-rc5/lib/site_perl/5.8.1
//nfs/private/user/srdas/i686/perl-pre-rc5/lib/site_perl
.
