executing the test command dist/ExtUtils-CBuilder/t/03-cplusplusplus fails,

[lillianokok]

perl@5.41.13 version, executing the test command dist/ExtUtils-CBuilder/t/03-cplusplusplus fails, error message:
dist/ExtUtils-CBuilder/t/03-cplusplus......................................# Failed test 'No search for C++ compiler in PATH when given absolute path to C compiler'
 at t/03-cplusplus.t line 73.
get: '/home/spack/lib/spack/env/gcc/g++'
 Expected: '/home/stage/root/spack-stage-perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/spack-src/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
 It looks like you failed 1 out of 7 tests.
Failed at test 7
The expected result is to find a non-existent path, but the test case reports an error Failed. Does this test case need optimization?

Module:

Description

perl@5.41.13 version, executing the test command dist/ExtUtils-CBuilder/t/03-cplusplusplus fails, error message:
dist/ExtUtils-CBuilder/t/03-cplusplus......................................# Failed test 'No search for C++ compiler in PATH when given absolute path to C compiler'
 at t/03-cplusplus.t line 73.
get: '/home/spack/lib/spack/env/gcc/g++'
 Expected: '/home/stage/root/spack-stage-perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/spack-src/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
 It looks like you failed 1 out of 7 tests.
Failed at test 7
The expected result is to find a non-existent path, but the test case reports an error Failed. Does this test case need optimization?
**Steps to Reproduce**
<!-- A one-liner or script to reproduce the issue. -->
 at t/03-cplusplus.t line 73.
**Expected behavior**
<!-- A clear and concise description of what you expected to happen. -->
no errors
**Perl configuration**
<!-- Please paste `perl -V` output just below. -->

perl -V output goes here

5.41.13

[mauke]

Probably a duplicate of #23277.

[lillianokok]

Probably a duplicate of #23277.

ok Thanks

[lillianokok]

Probably a duplicate of #23277.

But I fixed it according to the method of #23339, and the problem still exists. What should I do?

dist/ExtUtils-CBuilder/t/03-cplusplus ............................ #   Failed test 'did not search PATH for C++ compiler when given absolute path to C compiler'
   at t/03-cplusplus.t line 77.
          got: 'c++'
     expected: '/home/stage/root/spack-stage-perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/spack-src/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
 Looks like you failed 1 test of 7.
FAILED at test 7

{
    local $ENV{CXX};
    delete $ENV{CXX};
    # GH #23146
    my $fake_cc = File::Spec->rel2abs(File::Spec->catfile(qw(some directory what doesnt exist), 'cc'));
    my $cb = ExtUtils::CBuilder->new(
        quiet => $quiet,
        config => {
            cc => $fake_cc,
        },
    );

    is $cb->{config}{cxx}, $fake_cc, "did not search PATH for C++ compiler when given absolute path to C compiler";
}

[jkeenan]

@lillianokok, can you please supply the output of perl -V for the perl build in which you are observing this problem?

(Without that it is difficult for someone to try to reproduce your problem.) Thanks.

[lillianokok]

@lillianokok, can you please supply the output of perl -V for the perl build in which you are observing this problem?

(Without that it is difficult for someone to try to reproduce your problem.) Thanks.

./perl5.41.13 -V
Summary of my perl5 (revision 5 version 41 subversion 13) configuration:

Platform:
osname=linux
osvers=4.18.0-193.el8.aarch64
archname=aarch64-linux-thread-multi
uname='linux localhost.localdomain 4.18.0-193.el8.aarch64 #1 smp fri may 8 11:05:12 utc 2020 aarch64 aarch64 aarch64 gnulinux '
config_args='-des -Dprefix=/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm -Dlocincpth=/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/include -Dloclibpth=/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/lib -Accflags=-DAPPLLIB_EXP="/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/perl5" -Duseshrplib -Dusethreads -Dusedevel'
hint=recommended
useposix=true
d_sigaction=define
useithreads=define
usemultiplicity=define
use64bitint=define
use64bitall=define
uselongdouble=undef
usemymalloc=n
default_inc_excludes_dot=define
Compiler:
cc='/usr/bin/gcc'
ccflags =' -D_REENTRANT -D_GNU_SOURCE -DAPPLLIB_EXP="/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/perl5" -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2'
optimize='-O2'
cppflags='-D_REENTRANT -D_GNU_SOURCE -DAPPLLIB_EXP="/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/perl5" -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -I/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/include'
ccversion=''
gccversion='8.5.0 20210514 (Red Hat 8.5.0-12)'
gccosandvers=''
intsize=4
longsize=8
ptrsize=8
doublesize=8
byteorder=12345678
doublekind=3
d_longlong=define
longlongsize=8
d_longdbl=define
longdblsize=16
longdblkind=1
ivtype='long'
ivsize=8
nvtype='double'
nvsize=8
Off_t='off_t'
lseeksize=8
alignbytes=8
prototype=define
Linker and Libraries:
ld='/usr/bin/gcc'
ldflags =' -fstack-protector-strong -L/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/lib'
libpth=/usr/local/lib /usr/lib /home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/lib /usr/lib64 /usr/local/lib64
libs=-lpthread -lgdbm -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc
libc=libc-2.28.so
so=so
useshrplib=true
libperl=libperl.so
gnulibc_version='2.28'
Dynamic Linking:
dlsrc=dl_dlopen.xs
dlext=so
d_dlsymun=undef
ccdlflags='-Wl,-E -Wl,-rpath,/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/5.41.13/aarch64-linux-thread-multi/CORE'
cccdlflags='-fPIC'
lddlflags='-shared -O2 -L/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/gdbm-1.18.1-ndulcsnnue4pjdtxj3bjiob42nlg6lyc/lib -fstack-protector-strong'

Characteristics of this binary (from libperl):
Compile-time options:
HAS_LONG_DOUBLE
HAS_STRTOLD
HAS_TIMES
MULTIPLICITY
PERLIO_LAYERS
PERL_COPY_ON_WRITE
PERL_DONT_CREATE_GVSV
PERL_HASH_FUNC_SIPHASH13
PERL_HASH_USE_SBOX32
PERL_MALLOC_WRAP
PERL_OP_PARENT
PERL_PRESERVE_IVUV
PERL_USE_DEVEL
PERL_USE_SAFE_PUTENV
USE_64_BIT_ALL
USE_64_BIT_INT
USE_ITHREADS
USE_LARGE_FILES
USE_LOCALE
USE_LOCALE_COLLATE
USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC
USE_LOCALE_TIME
USE_PERLIO
USE_PERL_ATOF
USE_REENTRANT_API
USE_THREAD_SAFE_LOCALE
Built under linux
Compiled at May 30 2025 09:00:22
@inc:
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/perl5
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/site_perl/5.41.13/aarch64-linux-thread-multi
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/site_perl/5.41.13
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/5.41.13/aarch64-linux-thread-multi
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/perl-5.41.13-v424hwyrgfidyplaekvbekn7lv24toxm/lib/5.41.13

[jplesnik]

The issue is still valid with perl-5.42.0-RC1.tar.xz.

[lillianokok]

The issue is still valid with perl-5.42.0-RC1.tar.xz.

Please confirm whether it is a bug and whether it needs to be modified.

[jplesnik]

The issue is still valid with perl-5.42.0-RC1.tar.xz.

Please confirm whether it is a bug and whether it needs to be modified.

The failure is still here

#   Failed test 'did not search PATH for C++ compiler when given absolute path to C compiler'
#   at t/03-cplusplus.t line 75.
#          got: 'g++'
#     expected: '/builddir/build/BUILD/perl-5.42.0-build/perl-5.42.0-RC1/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
# Looks like you failed 1 test of 7.
../dist/ExtUtils-CBuilder/t/03-cplusplus.t ........................... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/7 subtests 

Complete build with log could be found
https://koji.fedoraproject.org/koji/taskinfo?taskID=134417222

[jkeenan]

The issue is still valid with perl-5.42.0-RC1.tar.xz.

Please confirm whether it is a bug and whether it needs to be modified.

The failure is still here

#   Failed test 'did not search PATH for C++ compiler when given absolute path to C compiler'
#   at t/03-cplusplus.t line 75.
#          got: 'g++'
#     expected: '/builddir/build/BUILD/perl-5.42.0-build/perl-5.42.0-RC1/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
# Looks like you failed 1 test of 7.
../dist/ExtUtils-CBuilder/t/03-cplusplus.t ........................... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/7 subtests 

Complete build with log could be found https://koji.fedoraproject.org/koji/taskinfo?taskID=134417222

In the file 'root.log' linked to from the URL above I read:

DEBUG util.py:461:  perl-5.42.0-Fix-03-cplusplus-t.patch

This suggests to me that in your RPM build you are applying a patch to the Perl source code which is no longer needed because we (Perl 5 Porters) have already modified the code as found in perl-5.42.0-RC1.

I myself have tried several times to configure and build a perl which reproduces your test failure, but I have not been able to reproduce that.

My recommendation is that you do either (a) a git checkout of the blead branch of our source code from https://github.com/Perl/perl5; or (b) get a tarball of perl-5.42.0-RC1; configure with a small number of command-line switches, build a perl and run the failing test, all outside your RPM build environment.

[jplesnik]

The issue is still valid with perl-5.42.0-RC1.tar.xz.

Please confirm whether it is a bug and whether it needs to be modified.

The failure is still here

#   Failed test 'did not search PATH for C++ compiler when given absolute path to C compiler'
#   at t/03-cplusplus.t line 75.
#          got: 'g++'
#     expected: '/builddir/build/BUILD/perl-5.42.0-build/perl-5.42.0-RC1/dist/ExtUtils-CBuilder/some/directory/what/doesnt/exist/cc'
# Looks like you failed 1 test of 7.
../dist/ExtUtils-CBuilder/t/03-cplusplus.t ........................... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/7 subtests 

Complete build with log could be found https://koji.fedoraproject.org/koji/taskinfo?taskID=134417222

In the file 'root.log' linked to from the URL above I read:

DEBUG util.py:461:  perl-5.42.0-Fix-03-cplusplus-t.patch

I created this patch to be able to build perl for my rebuild of perl dependencies in Fedora. It only remove the failing tests case.
However, the patch is not used for this build which failed. You can see it in build.log.

This suggests to me that in your RPM build you are applying a patch to the Perl source code which is no longer needed because we (Perl 5 Porters) have already modified the code as found in perl-5.42.0-RC1.

I myself have tried several times to configure and build a perl which reproduces your test failure, but I have not been able to reproduce that.

My recommendation is that you do either (a) a git checkout of the blead branch of our source code from https://github.com/Perl/perl5; or (b) get a tarball of perl-5.42.0-RC1; configure with a small number of command-line switches, build a perl and run the failing test, all outside your RPM build environment.

[haarg]

Do you have a CC environment variable set? Could you try using this patch?

diff --git i/dist/ExtUtils-CBuilder/t/03-cplusplus.t w/dist/ExtUtils-CBuilder/t/03-cplusplus.t
index c87fefd7b1..c85b93f05b 100644
--- i/dist/ExtUtils-CBuilder/t/03-cplusplus.t
+++ w/dist/ExtUtils-CBuilder/t/03-cplusplus.t
@@ -61,6 +61,8 @@ if ($^O eq 'VMS') {
 }
 
 {
+    local $ENV{CC};
+    delete $ENV{CC};
     local $ENV{CXX};
     delete $ENV{CXX};
     # GH #23146

[jplesnik]

Do you have a CC environment variable set? Could you try using this patch?

diff --git i/dist/ExtUtils-CBuilder/t/03-cplusplus.t w/dist/ExtUtils-CBuilder/t/03-cplusplus.t
index c87fefd7b1..c85b93f05b 100644
--- i/dist/ExtUtils-CBuilder/t/03-cplusplus.t
+++ w/dist/ExtUtils-CBuilder/t/03-cplusplus.t
@@ -61,6 +61,8 @@ if ($^O eq 'VMS') {
 }
 
 {
+    local $ENV{CC};
+    delete $ENV{CC};
     local $ENV{CXX};
     delete $ENV{CXX};
     # GH #23146

CC is defined. Your patch fixed the build.
Thank you.