Adding upstream version 3.0.0.upstream/3.0.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 18 insertions, 5 deletions

diff --git a/include/make/options.mk b/include/make/options.mk
index 022981c..d212586 100644
--- a/include/make/options.mk
+++ b/include/make/options.mk
@@ -23,14 +23,15 @@ build_options   = $(foreach opt,$(use_opts),$(call ignore_implicit,$(opt)))
 # Make a list of all known features with +/- prepended depending on their
 # activation status. Must be a macro so that dynamically enabled ones are
 # evaluated with their current status.
-build_features  = $(foreach opt,$(patsubst USE_%,%,$(sort $(use_opts))),$(if $(USE_$(opt)),+$(opt),-$(opt)))
+build_features  = $(foreach opt,$(patsubst USE_%,%,$(sort $(use_opts))),$(if $(USE_$(opt):0=),+$(opt),-$(opt)))
 
-# This returns a list of -DUSE_* for all known USE_* that are set
-opts_as_defines = $(foreach opt,$(use_opts),$(if $($(opt)),-D$(opt),))
+# This returns a list of -DUSE_* for all known USE_* that are set to anything
+# neither empty nor '0'.
+opts_as_defines = $(foreach opt,$(use_opts),$(if $($(opt):0=),-D$(opt),))
 
 # Lists all enabled or disabled options without the "USE_" prefix
-enabled_opts    = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt)),$(opt),))
-disabled_opts   = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt)),,$(opt)))
+enabled_opts    = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt):0=),$(opt),))
+disabled_opts   = $(foreach opt,$(patsubst USE_%,%,$(use_opts)),$(if $(USE_$(opt):0=),,$(opt)))
 
 # preset all XXX_{INC,LIB,CFLAGS,LDFLAGS,SRC} variables to empty for $1=XXX
 reset_opt_vars = $(foreach name,INC LIB CFLAGS LDFLAGS SRC,$(eval $(1)_$(name)=))
@@ -50,3 +51,15 @@ endef
 
 # collect all enabled USE_foo's foo_{C,LD}FLAGS into OPTIONS_{C,LD}FLAGS
 collect_opts_flags = $(foreach opt,$(enabled_opts),$(eval $(call collect_opt_flags,$(opt))))
+
+# Check that any USE_* variable that was forced actually exist. For this we'll
+# build a list of the MAKEOVERRIDES variables that start with USE_*, and keep
+# the ones that do not match any of the patterns built by appending '=%' to all
+# use_opts. The outstanding ones are thus unknown and each of them produces a
+# warning.
+warn_unknown_options =                                                       \
+    $(foreach unknown,                                                       \
+              $(filter-out $(foreach opt,$(use_opts),$(opt:==%)),            \
+                           $(foreach opt,$(MAKEOVERRIDES),                   \
+                                     $(strip $(filter USE_%,$(opt))))),      \
+              $(warning Warning: ignoring unknown build option: $(unknown)))