Automatically disable USE_BINARYBUILDER_xxx when USE_SYSTEM_xxx is set

Also renames `USE_BINARYBUILDER_UNWIND` to `USE_BINARYBUILDER_LIBUNWIND`
for consistency, as well as providing a little bit of dependency logic
to auto-disable `USE_BINARYBUILDER_SUITESPARSE` if `USE_SYSTEM_BLAS` is
set, for example.

Author: staticfloat

Make.inc

@@ -938,8 +938,34 @@ USE_BINARYBUILDER := 0
 endif
 
 # This is the set of projects that BinaryBuilder dependencies are hooked up for.
-BB_PROJECTS := OPENBLAS LLVM SUITESPARSE OPENLIBM GMP MBEDTLS LIBSSH2 MPFR CURL LIBGIT2 PCRE LIBUV UNWIND
-$(foreach proj,$(BB_PROJECTS),$(if $(USE_BINARYBUILDER_$(proj)),,$(eval USE_BINARYBUILDER_$(proj) := $(USE_BINARYBUILDER))))
+BB_PROJECTS := OPENBLAS LLVM SUITESPARSE OPENLIBM GMP MBEDTLS LIBSSH2 MPFR CURL LIBGIT2 PCRE LIBUV LIBUNWIND
+define SET_BB_DEFAULT
+# First, check to see if BB is disabled on a global setting
+ifneq ($$(USE_BINARYBUILDER),1)
+USE_BINARYBUILDER_$(1) := 0
+else
+# If it's not, check to see if it's disabled by a USE_SYSTEM_xxx flag
+ifneq ($$(USE_SYSTEM_$(1)),0)
+USE_BINARYBUILDER_$(1) := 0
+else
+USE_BINARYBUILDER_$(1) := 1
+endif
+endif
+endef
+$(foreach proj,$(BB_PROJECTS),$(eval $(call SET_BB_DEFAULT,$(proj))))
+
+# Some special restrictions on BB usage:
+ifneq ($(USE_SYSTEM_BLAS),0)
+# Since the names don't line up (`BLAS` vs. `OPENBLA`), manually gate:
+USE_BINARYBUILDER_OPENBLAS := 0
+# Disable BB SuiteSparse if we're using system BLAS
+USE_BINARYBUILDER_SUITESPARSE := 0
+endif
+
+ifneq ($(USE_SYSTEM_LIBM),0)
+# If we're using system libm, disable BB OpenLibm
+USE_BINARYBUILDER_OPENLIBM := 0
+endif
 
 # Use the Assertions build
 BINARYBUILDER_LLVM_ASSERTS := 0

deps/unwind.mk

@@ -1,6 +1,6 @@
 ## UNWIND ##
 
-ifneq ($(USE_BINARYBUILDER_UNWIND),1)
+ifneq ($(USE_BINARYBUILDER_LIBUNWIND),1)
 LIBUNWIND_CFLAGS := -U_FORTIFY_SOURCE $(fPIC)
 LIBUNWIND_CPPFLAGS :=
 
@@ -102,7 +102,7 @@ fastcheck-osxunwind: check-osxunwind
 check-osxunwind: compile-osxunwind
 install-osxunwind: $(build_prefix)/manifest/osxunwind
 
-else # USE_BINARYBUILDER_UNWIND
+else # USE_BINARYBUILDER_LIBUNWIND
 
 UNWIND_BB_URL_BASE := https://github.com/JuliaPackaging/Yggdrasil/releases/download/LibUnwind-v$(UNWIND_VER)-$(UNWIND_BB_REL)
 UNWIND_BB_NAME := LibUnwind.v$(UNWIND_VER)