config: add support for a second part of the generated choices

Some components have configuration options that can depend on
generic options, so they should go below those.

uClibc for example:
- has its own options (wchar...)
- uses the generic options (threads...)
- if linuxthreads chosen, offers two impls

So we need to be able to split the components options in 2,
one part that is above the generic options, and one part that
ends up below the generic options.

5 files changed, 38 insertions, 10 deletions

diff --git a/config/cc.in b/config/cc.in
index 8869f03..4afa278 100644
--- a/config/cc.in
+++ b/config/cc.in
@@ -115,4 +115,6 @@ config CC_LANG_OTHERS
 
 endif # ! BARE_METAL
 
+source "config.gen/cc.in.2"
+
 endmenu
diff --git a/config/config.mk b/config/config.mk
index c0247b1..434e463 100644
--- a/config/config.mk
+++ b/config/config.mk
@@ -9,16 +9,20 @@
 KCONFIG_TOP = config/config.in
 
 # Build the list of all source config files
-STATIC_CONFIG_FILES = $(patsubst $(CT_LIB_DIR)/%,%,$(shell find $(CT_LIB_DIR)/config -type f -name '*.in' 2>/dev/null))
+STATIC_CONFIG_FILES = $(patsubst $(CT_LIB_DIR)/%,%,$(shell find $(CT_LIB_DIR)/config -type f \( -name '*.in' -o -name '*.in.2' \) 2>/dev/null))
 # ... and how to access them:
 $(STATIC_CONFIG_FILES): config
 
 # Build a list of per-component-type source config files
-ARCH_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/arch/*.in))
-KERNEL_CONFIG_FILES = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/kernel/*.in))
-CC_CONFIG_FILES     = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/cc/*.in))
-LIBC_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/libc/*.in))
-DEBUG_CONFIG_FILES  = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/debug/*.in))
+ARCH_CONFIG_FILES     = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/arch/*.in))
+ARCH_CONFIG_FILES_2   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/arch/*.in.2))
+KERNEL_CONFIG_FILES   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/kernel/*.in))
+KERNEL_CONFIG_FILES_2 = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/kernel/*.in.2))
+CC_CONFIG_FILES       = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/cc/*.in))
+CC_CONFIG_FILES_2     = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/cc/*.in.2))
+LIBC_CONFIG_FILES     = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/libc/*.in))
+LIBC_CONFIG_FILES_2   = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/libc/*.in.2))
+DEBUG_CONFIG_FILES    = $(patsubst $(CT_LIB_DIR)/%,%,$(wildcard $(CT_LIB_DIR)/config/debug/*.in))
 
 # Build the list of generated config files
 GEN_CONFIG_FILES = config.gen/arch.in     \
@@ -117,6 +121,20 @@ define build_gen_choice_in
 	    echo "source \"$${file}\"";                                         \
 	  done;                                                                 \
 	 ) >$(1)
+	$(SILENT)(echo "# $(2) second part options";                            \
+	  echo "# Generated file, do not edit!!!";                              \
+	  for entry in $(6); do                                                 \
+	    file="$(4)/$${entry}.in";                                           \
+	    _entry=$$(echo "$${entry}" |$(sed) -r -s -e 's/[-.+]/_/g;');        \
+	    if [ -f "$${file}.2" ]; then                                        \
+	      echo "";                                                          \
+	      echo "if $(3)_$${_entry}";                                        \
+	      echo "comment \"$${entry} other options\"";                       \
+	      echo "source \"$${file}.2\"";                                     \
+	      echo "endif";                                                     \
+	    fi;                                                                 \
+	  done;                                                                 \
+	 ) >$(1).2
 endef
 
 # The function 'build_gen_menu_in' builds a menuconfig for each component in
@@ -154,16 +172,18 @@ endef
 #-----------------------------------------------------------
 # The rules for the generated config files
 
-config.gen/arch.in: $(ARCH_CONFIG_FILES)
+# WARNING! If a .in file disapears between two runs, that will NOT be detected!
+
+config.gen/arch.in: $(ARCH_CONFIG_FILES) $(ARCH_CONFIG_FILES_2)
 	$(call build_gen_choice_in,$@,Target Architecture,ARCH,config/arch,Y,$(ARCHS))
 
-config.gen/kernel.in: $(KERNEL_CONFIG_FILES)
+config.gen/kernel.in: $(KERNEL_CONFIG_FILES) $(KERNEL_CONFIG_FILES_2)
 	$(call build_gen_choice_in,$@,Target OS,KERNEL,config/kernel,Y,$(KERNELS))
 
-config.gen/cc.in: $(CC_CONFIG_FILES)
+config.gen/cc.in: $(CC_CONFIG_FILES) $(CC_CONFIG_FILES_2)
 	$(call build_gen_choice_in,$@,C compiler,CC,config/cc,,$(CCS))
 
-config.gen/libc.in: $(LIBC_CONFIG_FILES)
+config.gen/libc.in: $(LIBC_CONFIG_FILES) $(LIBC_CONFIG_FILES_2)
 	$(call build_gen_choice_in,$@,C library,LIBC,config/libc,Y,$(LIBCS))
 
 config.gen/debug.in: $(DEBUG_CONFIG_FILES)
diff --git a/config/kernel.in b/config/kernel.in
index 6dd9c6c..630eae6 100644
--- a/config/kernel.in
+++ b/config/kernel.in
@@ -36,4 +36,6 @@ config SHARED_LIBS
       You might not want shared libraries if you're building for a target that
       don't support it (maybe some nommu targets, for example, or bare metal).
 
+source "config.gen/kernel.in.2"
+
 endmenu
diff --git a/config/libc.in b/config/libc.in
index de6955e..74bdd1a 100644
--- a/config/libc.in
+++ b/config/libc.in
@@ -63,6 +63,8 @@ config THREADS_NONE
 
 endchoice
 
+source "config.gen/libc.in.2"
+
 endif # ! LIBC_none
 
 endmenu
diff --git a/config/target.in b/config/target.in
index 0a3e1bb..c66ddc2 100644
--- a/config/target.in
+++ b/config/target.in
@@ -311,4 +311,6 @@ config TARGET_LDFLAGS
       
       Leave blank if you don't know better.
 
+source "config.gen/arch.in.2"
+
 endmenu