[Bug 1716324] New: perl-Text-Xslate-3.5.6-5.fc30 is not linked to libperl.so

https://bugzilla.redhat.com/show_bug.cgi?id=1716324

Bug ID: 1716324
           Summary: perl-Text-Xslate-3.5.6-5.fc30 is not linked to
                    libperl.so
           Product: Fedora
           Version: 30
            Status: NEW
         Component: perl-Text-Xslate
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail]
  Target Milestone: ---
    Classification: Fedora

perl-Text-Xslate-3.5.6-5.fc30 lost a dependency on libperl.so since
-Wl,--as-needed was added to distribution-wide linker flags:

$ scanelf -n blib/arch/auto/Text/Xslate/Xslate.so 
 TYPE   NEEDED FILE 
ET_DYN libc.so.6 blib/arch/auto/Text/Xslate/Xslate.so

$ ldd -r  blib/arch/auto/Text/Xslate/Xslate.so
        linux-vdso.so.1 (0x00007fff0d5cb000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f948b9a1000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f948bb8f000)
undefined symbol: Perl_sv_cmp   (blib/arch/auto/Text/Xslate/Xslate.so)
undefined symbol: PL_ppaddr     (blib/arch/auto/Text/Xslate/Xslate.so)
[...]

Xslate.so is built like this:

gcc -lpthread -shared -Wl,-z,relro -Wl,--as-needed -Wl,-z,now
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld -L/usr/local/lib
-fstack-protector-strong -lperl -o blib/arch/auto/Text/Xslate/Xslate.so
lib/Text/Xslate.o src/xslate_methods.o

The cause is that -Wl,--as-needed takes effect when library is supplied and
considering only preceding object files and ignoring and following object
files. A correct linker command must list all object files before -l flags.
Like this:

gcc lib/Text/Xslate.o src/xslate_methods.o -lpthread -shared -Wl,-z,relro
-Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
-L/usr/local/lib -fstack-protector-strong -lperl -o
blib/arch/auto/Text/Xslate/Xslate.so

Either there is bug in perl-Text-Xslate build script or in
Module::Build::XSUtil that it uses.