TOPDIR env causes LD to not find required files

[n33ll]

I faced this issue while making a custom embedded OS with the help of Buildroot, due to Buildroot setting a TOPDIR env for the build process. Verified this issue by locally building gun-efi (master) using "TOPDIR=~/topdir make" command. When executed, the build rocess fails with the following error :

ld -nostdlib --warn-common --no-undefined --fatal-warnings --build-id=sha1 -z nocombreloc -shared -Bsymbolic -L/home/neel/gnu-efi//apps/../x86_64/lib -L/home/neel/gnu-efi//apps/../x86_64/gnuefi /home/neel/gnu-efi//apps/../x86_64/gnuefi/crt0-efi-x86_64.o t.o -o t.so -lefi -lgnuefi /usr/lib/gcc/x86_64-linux-gnu/11/libgcc.a -T /home/neel/gnu-efi//apps/../gnuefi/elf_x86_64_efi.lds
ld: cannot find /home/neel/gnu-efi//apps/../x86_64/gnuefi/crt0-efi-x86_64.o: No such file or directory
ld: cannot find -lefi: No such file or directory
ld: cannot find -lgnuefi: No such file or directory
make[1]: * [/home/neel/gnu-efi//apps/../Make.rules:51: t.so] Error 1
make[1]: Leaving directory '/home/neel/testtesttest/x86_64/apps'
make: * [Makefile:82: apps] Error 2