Let's figure out how to force CC/CXX in there. FAILED: bindings/ocaml/llvm/llvm_ocaml.o cd /var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/bindings/ocaml/llvm && /usr/bin/ocamlfind ocamlc -c /var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/bindings/ocaml/llvm/llvm_ocaml.c -ccopt " -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/include -I/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm/include -DNDEBUG " sh: line 1: x86_64-pc-linux-gnu-gcc-10.2.0: command not found File "/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/bindings/ocaml/llvm/llvm_ocaml.c", line 1: Error: I/O error: x86_64-pc-linux-gnu-gcc-10.2.0 -O2 -fno-strict-aliasing -fwrapv -fPIC -D_FILE_OFFSET_BITS=64 -D_REENTRANT -c -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/include -I/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm/include -DNDEBUG -I'/usr/lib64/ocaml' '/var/tmp/portage/dev-ml/llvm-ocaml-12.0.0_rc5/work/llvm-ocaml-12.0.0_rc5_build/bindings/ocaml/llvm/llvm_ocaml.c'
'ocamlfind ocamlc' apparently accepts -cc arg but I can't figure out how to make 'ocamlfind ocamlmklib' accept compiler override.