Re^2: Inline::C and Dist::Zilla

When is the libgcc_s dependency even necessary? Gcc documents the -static-libgcc option, while saying:

There are several situations in which an application should use the shared libgcc instead of the static version. The most common of these is when the application wishes to throw and catch exceptions across different shared libraries. ...

Also, if a module depends on some small and obscure library, it might be preferable to static link with that. A la

$ make foobar LDFLAGS='-lthis -lthat -Wl,-dn,-lobscure,-dy'
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(Mind you, this is all from the linux perspective.)

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Re^3: Inline::C and Dist::Zilla by syphilis (Archbishop) on Nov 14, 2014 at 23:48 UTC
When is the libgcc_s dependency even necessary? Good point. I wasn't sure if invoking -static-libgcc would work if perl had not been built with the same option - but I've just run a quick check (see below) and it seems that there's no problem in that regard. So if the OP wants to distribute binaries compiled with gcc-4, but doesn't want to distribute the dll, then that's the way to go. Actually, there's sometimes a dependency on a second dll (libstdc++-6.dll) so, to avoid having to distribute that dll, you'd also invoke -static-libstdc++. These are linker flags, so they need to be given to $Config{ld}, which is g++ on Mingw-built perls. As a quick test I ran: `use Inline C => Config => BUILD_NOISY =>1, LD => 'g++ -static-libgcc', INC => '-IC:/MinGW/msys/1.0/local/include'; use Inline C => <<'EOC'; SV * foo(SV * x, SV * y) { return newSVnv(SvNV(x) * SvNV(y)); } EOC $x = foo(2.3, 1.1); print $x, "\n";` [download] Sure enough, the script ran fine and objdump revealed that the dll that was built had no dependency upon libgcc_s_dw2-1.dll: `C:\_32\pscrpt\inline>objdump -x _Inline/lib/auto/try_pl_0a36/try_pl_0a +36.dll \| grep "DLL Name" DLL Name: KERNEL32.dll DLL Name: msvcrt.dll DLL Name: perl516.dll` [download] Whereas, if I commented out the `LD => 'g++ ...` assignment I then got `C:\_32\pscrpt\inline>objdump -x _Inline/lib/auto/try_pl_0a36/try_pl_0a +36.dll \| grep "DLL Name" DLL Name: libgcc_s_dw2-1.dll DLL Name: KERNEL32.dll DLL Name: msvcrt.dll DLL Name: perl516.dll` [download] Cheers, Rob	[reply] [d/l] [select]

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Re^3: Inline::C and Dist::Zilla
by syphilis (Archbishop) on Nov 14, 2014 at 23:48 UTC

When is the libgcc_s dependency even necessary?

use Inline C => Config =>
  BUILD_NOISY =>1,
  LD => 'g++ -static-libgcc',
  INC => '-IC:/MinGW/msys/1.0/local/include';

use Inline C => <<'EOC';

SV * foo(SV * x, SV * y) {
  return newSVnv(SvNV(x) * SvNV(y));
}

EOC

$x = foo(2.3, 1.1);
print $x, "\n";
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C:\_32\pscrpt\inline>objdump -x _Inline/lib/auto/try_pl_0a36/try_pl_0a
+36.dll | grep "DLL Name"
        DLL Name: KERNEL32.dll
        DLL Name: msvcrt.dll
        DLL Name: perl516.dll
[download]

LD => 'g++ ...

C:\_32\pscrpt\inline>objdump -x _Inline/lib/auto/try_pl_0a36/try_pl_0a
+36.dll | grep "DLL Name"
        DLL Name: libgcc_s_dw2-1.dll
        DLL Name: KERNEL32.dll
        DLL Name: msvcrt.dll
        DLL Name: perl516.dll
[download]

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