GCL 2.7.1 cannot be compiled on Arch Linux

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GCL 2.7.1 cannot be compiled from source on Arch Linux and likely other dis=
tributions (except Debian). I successfully compiled GCL 2.7.1 on Arch Linux=
 and created a patch that fixes the issue.

My gcc version is:
gcc (GCC) 15.2.1 20260209

Commands used:

patch -p1 -i gcl.patch

./configure --prefix=3D/home/Devel/Desktop/gcl-2.7.1/build && make install

Binary is then produced in build/bin. However, I could not replicate that i=
n a PKGBUILD. If you try to do the exact same thing in a PKGBUILD, you'd ge=
t something like that:

;; End of Pass 2. =20
OPTIMIZE levels: Safety=3D3, Space=3D0, Speed=3D3
;; Finished compiling gcl0/gcl_cmptype.o.
[ "gcl_cmptype" =3D "gcl_c" ] || [ "gcl_cmptype" =3D "gcl_listlib" ] || \
        ln -f gcl0/gcl_cmptype.o $(echo gcl0/gcl_cmptype.o |sed 's,\.o,\.do=
ne,g') #FIXME directory link
rm unixport/raw_pre_gcl
make[1]: Leaving directory '/home/Devel/Desktop/gcla/src/gcl-2.7.1/build'
make: *** [Makefile:1044: all] Error 2


Best wishes!
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