gnupg x-compilation fails for i386 only

[rofl0r]

http://pkg.sabotage.tech/process.cgi?action=pkgoverview&pkg=gnupg

i486-linux-musl-gcc -L/home/sabotage/www/building/lib -isystem /home/sabotage/www/building/include  -fdata-sections -ffunction-sections -Os -g0 -fno-unwind-tables -fno-asynchronous-unwind-tables -Wa,--noexecstack -mtune=generic -D_GNU_SOURCE -Wall -Wno-pointer-sign  -s -Wl,--gc-sections -Wl,-z,relro,-z,now -o mpicalc mpicalc.o ../cipher/libcipher.a ../mpi/libmpi.a ../util/libutil.a      
../mpi/libmpi.a(mpi-add.o): In function `mpi_add':
mpi-add.c:(.text.mpi_add+0xb1): undefined reference to `mpihelp_sub_n'
mpi-add.c:(.text.mpi_add+0x142): undefined reference to `mpihelp_sub_n'
mpi-add.c:(.text.mpi_add+0x16f): undefined reference to `mpihelp_sub_n'
mpi-add.c:(.text.mpi_add+0x193): undefined reference to `mpihelp_add_n'
../mpi/libmpi.a(mpi-bit.o): In function `mpi_rshift':
mpi-bit.c:(.text.mpi_rshift+0x3b): undefined reference to `mpihelp_rshift'
...