Strawberry Perl 5.42 - asm command

[Solathian]

When trying to install the module via cpanm Math::Prime::Util
It complains about:

pbrent63.c:48:5: warning: implicit declaration of function 'asm' [-Wimplicit-function-declaration]
   48 |     asm("mulq %2 \n\t"
      |     ^~~
pbrent63.c:58:33: error: expected ')' before ':' token
   58 |         "addq %%rdx, %%rax \n\t"
      |                                 ^
      |                                 )
   59 |         : "=a"(a)
      |         ~

Using C99 asm is not available as a command had to replace each with:
__asm__ __volatile__

After it
gmake
gmake test
gmake install

works fine

[sisyphus]

P5P added -std=c99 to $Config{ccflags} (for Windows builds of perl) beginning with the release of perl-5.40.0.
That seems dumb, to me. Why would one want to drag a c17 (or c23) level compiler back down to c99 ?
I certainly don't want that - and I make sure that the offending flag is not present in $Config{ccflags} in the perls that I build on Windows using mingw-w64 compilers. (And the removal of that flag has caused me absolutely NO issues.)

It's actually quite easy to remove that flag from Strawberry's$Config{ccflags}.
Just open Strawberry's perl/lib/Config_heavy.pl and remove the -std=c99 from the line that begins with ccflags='-std=c99 -DWIN32 ....'.

Having done that, cpanm Math::Prime::Util worked fine for me.

@Solathian, if you want to make the absence of -std=c99 a permanent feature of your Strawberry Perl, for consistency you should probably also remove the -std=c99 from the "ccflags_nolargefiles" entry further down in Config_heavy.pl.

[Solathian]

Oh I see. Thanks for the information, did not fiddle with my Perl's internal settings yet. Thanks for the info and the quick response!

[Solathian]

Now it is working thanks!