. ../../testutils.sh

# This test checks to make sure that Idris2's command line handling for the RefC backend is correct.
# It checks that:
#   1) Idris2 correctly finds `CFLAGS` and `LDFLAGS` in the environment,
#   2) The values in `CFLAGS` and `LDFLAGS` are separated correctly to be passed to the compiler
#
# (1) is achieved by compiling a c library (`externalc`) in a separate folder, and then explicitly
# pointing the compiler to the header files (with `-I./library/`) and shared library (with `-L./library`)
# and requesting that libexternalc.{so,dylib,dll} is linked (with `-lexternalc`). We additionally point the
# dynamic library loader to the correct location with `DYLD_LIBRARY_PATH`.
#
# (2) is achieved by passing multiple options, separated by spaces, in each of `CFLAGS` and `LDFLAGS`.
# These options are `-O3` for the c flags, and `-Wl,-pie` for the linker flags. They do not change the
# semantics of the resulting code (`-O3` simply optimises it more, and `-Wl,-S` removes debugging information
# from the final  executable), but do check that we correctly split up the environment variables when we
# pass them to the C compiler.

cd ./library/
    make > /dev/null
cd ..

export CFLAGS="-I./library/ -O3 ${CFLAGS}"
export LDFLAGS="-L./library/ -Wl,-S ${LDFLAGS}"
export LDLIBS="-lexternalc"
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:./library/"
export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:./library/"

idris2 --cg refc -o cffi Main.idr

$VALGRIND ./build/exec/cffi