Dear Monks, I wonder if what I see is a bug or it is a mistake on my part:

The following script will attempt to compile and link a sample C file (warning: it writes what's in __DATA__ as a file on your current dir) using ExtUtils::CBuilder. However, the compile() sub ignores the optimize flags I try to set. Basically I want to remove -g.

#!/usr/bin/env perl
use strict;
use warnings;

use ExtUtils::CBuilder;

my $cfile = 'hello.c';
(my $objfile = $cfile) =~ s/\.c$/.o/;

# warning, it writes C program to your disk
open(my $FH, '>', $cfile) or die "could not write C file ($cfile) to d
+isk, $!";
print $FH $_ for(<DATA>);
close($FH);
die "failed to write C file ($cfile) to disk." unless -f $cfile;

# warning it will produce object file on your disk
my $cbuilder = ExtUtils::CBuilder->new(
        config => {
                optimize => '-O7',
        },
);
$cbuilder->compile(
        source => $cfile,
        object_file => $objfile
);

__DATA__
#include <stdio.h>
int main(void){ printf("hello\n"); }
[download]

What I get (in linux, perl v 5.26.2, ExtUtils::CBuilder 0.280230) is compile() uses its own optimization (-O2 -g) and also mine (-O7):

gcc -I/usr/lib64/perl5/CORE -fPIC -c -D_REENTRANT -D_GNU_SOURCE -O2 -g
+ -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexcept
+ions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-
+switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=g
+eneric -fasynchronous-unwind-tables -fwrapv -fno-strict-aliasing -I/u
+sr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O7 -o he
+llo.o hello.c
[download]

bw, bliako