libc/*.sh: Deprecate libc_check_config step.

This step was only used in uClibc. However, with upcoming multilib, the
config management will have to be done for each variant differently,
anyway.

uClibc was the only user of libc_check_config step, as well as
CT_CONFIG_DIR directory. Retire these.

Two other clean-ups in uClibc.sh:
- KERNEL_HEADERS check seems to be bogus, this config option is not
  present even in 0.9.30 - which is not supported already.
- SHARED_LIB_LOADER_PREFIX was renamed to MULTILIB_DIR in 0.9.31,
  according to ChangeLog - and MULTILIB_DIR is passed from command line
  instead.

Signed-off-by: Alexey Neyman <stilor@att.net>

1 files changed, 24 insertions, 0 deletions

diff --git a/scripts/build/arch.sh b/scripts/build/arch.sh
new file mode 100644
index 0000000..48da2d6
--- /dev/null
+++ b/scripts/build/arch.sh
@@ -0,0 +1,24 @@
+# This file provides the default implementations of arch-specific functions.
+
+# Set up the target tuple
+CT_DoArchTupleValues() {
+    :;
+}
+
+# Multilib: change the target triplet according to CFLAGS
+CT_DoArchMultilibTarget() {
+    local multi_flags="${1}"
+    local target="${2}"
+
+    echo "${target}"
+}
+
+# Multilib: Adjust target tuple for GLIBC
+CT_DoArchGlibcAdjustTuple() {
+    local target="${1}"
+
+    echo "${target}"
+}
+
+# Override from the actual arch implementation as needed.
+. "${CT_LIB_DIR}/scripts/build/arch/${CT_ARCH}.sh"