| Subject: | Build fails with constness error |
I downloaded and unpacked Encode-Detect-1.01 and said:
% perl Makefile.PL PREFIX=$HOME
% make
It fails with compiler errors, the first of which is:
Copying Detector.xs -> lib/Encode/Detect/Detector.xs
lib/Encode/Detect/Detector.xs -> lib/Encode/Detect/Detector.c
Use of uninitialized value in concatenation (.) or string at
/home/ed/share/perl/5.8.8/ExtUtils/ParseXS.pm line 558, <GEN36> line 71.
cc -Isrc -I/usr/lib/perl/5.8/CORE -DXS_VERSION="1.01" -DVERSION="1.01"
-fPIC -x c++ -Iinclude -c -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS
-DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/inc\
lude -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -o
lib/Encode/Detect/Detector.o lib/Encode/Detect/Detector.c
lib/Encode/Detect/Detector.c: In function 'void
boot_Encode__Detect__Detector(PerlInterpreter*, CV*)':
lib/Encode/Detect/Detector.c:330: error: invalid conversion from 'const
char' to 'char*'
lib/Encode/Detect/Detector.c:330: error: initializing argument 4 of
'CV* Perl_newXS(PerlInterpreter*, char*, void (*)(PerlInterpreter*,
CV*), char*)'
I worked around it by editing the generated Detector.c to change
const char* file = __FILE__;
to just
char* file = __FILE__;
The bug might be in my XS setup somehow, I don't know.
% perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
Platform:
osname=linux, osvers=2.6.24.4, archname=i486-linux-gnu-thread-multi
uname='linux ninsei 2.6.24.4 #1 smp preempt fri apr 18 15:36:09 pdt
2008 i686 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.8.8
-Dsitearch=/usr/local/lib/perl/5.8.8 -Dman1dir=/usr/share/man/man1
-Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1
-Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl
-Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Uusesfio -Uusenm
-Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des'
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
-DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN
-fno-strict-aliasing -pipe -I/usr/local/include'
ccversion='', gccversion='4.1.2 20061115 (prerelease) (Debian
4.1.1-21)', 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=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.3.6.so, so=so, useshrplib=true,
libperl=libperl.so.5.8.8
gnulibc_version='2.3.6'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'
Characteristics of this binary (from libperl):
Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP THREADS_HAVE_PIDS USE_ITHREADS
USE_LARGE_FILES USE_PERLIO USE_REENTRANT_API
Built under linux
Compiled at Apr 25 2008 20:23:05
%ENV:
PERL5LIB="/home/ed/lib/perl/5.8.8:/home/ed/lib/perl/share/perl/5.8.8:/home/ed/share/perl/5.8.8"
@INC:
/home/ed/lib/perl/5.8.8
/home/ed/lib/perl/share/perl/5.8.8
/home/ed/share/perl/5.8.8
/etc/perl
/usr/local/lib/perl/5.8.8
/usr/local/share/perl/5.8.8
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.8
/usr/share/perl/5.8
/usr/local/lib/site_perl
.