diff -r 000000000000 -r f36c207348ef scripts/gen_in_frags.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/gen_in_frags.sh	Thu Sep 20 11:20:16 2012 +0800
@@ -0,0 +1,158 @@
+#!/bin/sh
+set -e
+
+# This scripts generates either a choice or a menuconfig
+# with the specified entries.
+#
+# Usage:
+#   generate a choice:
+#       gen_in_frags.sh choice <out-file> <label> <config-prefix> <base-dir> <conditionals> entry [entry...]
+#
+#   generate a menuconfig:
+#       gen_in_frags.sh menu <out-file> <label> <config-prefix> <base-dir> entry [entry...]
+#
+# where:
+#   out-file
+#       put the generated choice/menuconfig into that file
+#       for choices, it acts as the base bname of the file, the secondary
+#       parts (the .in.2) are put in out-file.2
+#
+#   label
+#       name for the entries family
+#       eg. Architecture, Kernel...
+#
+#   config-prefix
+#       prefix for the choice entries
+#       eg. ARCH, KERNEL...
+#
+#   base-dir
+#       base directory containing config files
+#       eg. config/arch, config/kernel...
+#
+#   conditionals (valid only for choice)
+#       generate backend conditionals if Y/y, don't if anything else
+#       if 'Y' (or 'y'), a dependency on the backen mode will be added
+#       to each entry
+#
+#   entry [entry...]
+#       a list of entry/ies toadd to the choice/menuconfig
+#       eg.:
+#           arm mips sh x86...
+#           linux cygwin mingw32 solaris...
+#           ...
+#
+#------------------------------------------------------------------------------
+
+# Generate a choice
+# See above for usage
+gen_choice() {
+    local out_file="${1}"
+    local label="${2}"
+    local cfg_prefix="${3}"
+    local base_dir="${4}"
+    local cond="${5}"
+    shift 5
+    local file entry _entry
+
+    # Generate the part-1
+    exec >"${out_file}"
+    printf '# %s menu\n' "${label}"
+    printf '# Generated file, do not edit!!!\n'
+    printf '\n'
+    printf 'choice GEN_CHOICE_%s\n' "${cfg_prefix}"
+    printf '    bool\n'
+    printf '    prompt "%s"\n' "${label}"
+    printf '\n'
+    for entry in "${@}"; do
+        file="${base_dir}/${entry}.in"
+        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')
+        printf 'config %s_%s\n' "${cfg_prefix}" "${_entry}"
+        printf '    bool\n'
+        printf '    prompt "%s"\n' "${entry}"
+        if [ "${cond}" = "Y" -o "${cond}" = "y" ]; then
+            printf '    depends on %s_%s_AVAILABLE\n' "${cfg_prefix}" "${_entry}"
+        fi
+        "${sed}" -r -e '/^## depends on /!d; s/^## /    /;' ${file} 2>/dev/null
+        "${sed}" -r -e '/^## select /!d; s/^## /    /;' ${file} 2>/dev/null
+        if "${grep}" -E '^## help' ${file} >/dev/null 2>&1; then
+            printf '    help\n'
+            "${sed}" -r -e '/^## help ?/!d; s/^## help ?/      /;' ${file} 2>/dev/null
+        fi
+        printf '\n'
+    done
+    printf 'endchoice\n'
+
+    for entry in "${@}"; do
+        file="${base_dir}/${entry}.in"
+        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')
+        printf '\n'
+        if [ "${cond}" = "Y" -o "${cond}" = "y" ]; then
+            printf 'config %s_%s_AVAILABLE\n' "${cfg_prefix}" "${_entry}"
+            printf '    bool\n'
+            printf '    default y if'
+            printf ' BACKEND_%s = "%s"' "${cfg_prefix}" "${entry}"
+            printf ' || BACKEND_%s = ""' "${cfg_prefix}"
+            printf ' || ! BACKEND\n'
+        fi
+        printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"
+        printf 'config %s\n' "${cfg_prefix}"
+        printf '    default "%s" if %s_%s\n' "${entry}" "${cfg_prefix}" "${_entry}"
+        printf 'source "%s"\n' "${file}"
+        printf 'endif\n'
+    done
+
+    # Generate the part-2
+    exec >"${out_file}.2"
+    printf '# %s second part options\n' "${label}"
+    printf '# Generated file, do not edit!!!\n'
+    for entry in "${@}"; do
+        file="${base_dir}/${entry}.in"
+        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')
+        if [ -f "${file}.2" ]; then
+            printf '\n'
+            printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"
+            printf 'comment "%s other options"\n' "${entry}"
+            printf 'source "%s.2"\n' "${file}"
+            printf 'endif\n'
+        fi
+    done
+}
+
+# Generate a menuconfig
+# See above for usage
+gen_menu() {
+    local out_file="${1}"
+    local label="${2}"
+    local cfg_prefix="${3}"
+    local base_dir="${4}"
+    shift 4
+    local file entry _entry
+
+    # GEnerate the menuconfig
+    exec >"${out_file}"
+    printf '# %s menu\n' "${label}"
+    printf '# Generated file, do not edit!!!\n'
+    printf '\n'
+    for entry in "${@}"; do
+        file="${base_dir}/${entry}.in"
+        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')
+        printf 'menuconfig %s_%s\n' "${cfg_prefix}" "${_entry}"
+        printf '    bool\n'
+        printf '    prompt "%s"\n' "${entry}"
+        "${sed}" -r -e '/^## depends on /!d; s/^## /    /;' ${file} 2>/dev/null
+        "${sed}" -r -e '/^## select /!d; s/^## /    /;' ${file} 2>/dev/null
+        if "${grep}" -E '^## help' ${file} >/dev/null 2>&1; then
+            printf '    help\n'
+            "${sed}" -r -e '/^## help ?/!d; s/^## help ?/      /;' ${file} 2>/dev/null
+        fi
+        printf '\n'
+        printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"
+        printf 'source "%s"\n' "${file}"
+        printf 'endif\n'
+        printf '\n'
+    done
+}
+
+type="${1}"
+shift
+"gen_${type}" "${@}"