[perl #39038] [BUG] linker failure with dynpmc on win32

[Jerry Gay]

# New Ticket Created by jerry gay
# Please include the string: [perl #39038]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=39038 >

#39035 has been fixed, so dynpmc's compile again. but they won't link
due to an unresolved external.

link -nologo -nodefaultlib -debug -dll -out:perl_group.dll "lib-perl_group.obj"
"perlarray.obj" "perlhash.obj" "perlnum.obj" "perlstring.obj" "perlenv.obj" "per
lint.obj" "perlscalar.obj" "perlundef.obj" oldnames.lib kernel32.lib user32.lib
gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32
.lib netapi32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib version.lib odbc32.lib o
dbccp32.lib msvcrt.lib "D:/usr/local/parrot/trunk/libparrot.lib"
Creating library perl_group.lib and object perl_group.exp
perlnum.obj : error LNK2019: unresolved external symbol _Parrot_signbit referenc
ed in function _Parrot_PerlNum_set_number_native
perl_group.dll : fatal error LNK1120: 1 unresolved externals
partial link perl_group.dll failed (24576)
NMAKE : fatal error U1077: 'D:\usr\local\perl\bin\perl.exe' : return code '0x2'
Stop.
NMAKE : fatal error U1077: 'D:\usr\local\perl\bin\perl.exe' : return code '0x2'
Stop.

[Jerry Gay]

after 13473 (bernhard++ for trying) building parrot now fails during
src/platform.c

src\platform.c
platform.c
config\gen\platform\generic\math.c(15) : error C2375: 'Parrot_signbit'
: redefinition; different linkage
include\parrot\platform_interface.h(16) : see declaration of
'Parrot_signbit'

NMAKE : fatal error U1077: 'D:\usr\local\perl\bin\perl.exe' : return code '0x2'
Stop.

i only had 'build and complain' shaped tuits over the weekend, but
today i hope to find some tuits of the 'fix it' variety. still looking
for 'em.