uClibc: Add support for uClibc-ng

This commit adds uClibc-ng 1.0.8.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

config/libc/uClibc.in

@@ -26,6 +26,11 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config LIBC_UCLIBC_NG_V_1_0_8
+    bool
+    prompt "1.0.8"
+    select LIBC_UCLIBC_NG_1_0_8_or_later
+
 config LIBC_UCLIBC_V_0_9_33_2
     bool
     prompt "0.9.33.2"
@@ -55,8 +60,18 @@ config LIBC_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "1.0.8" if LIBC_UCLIBC_NG_V_1_0_8
     default "0.9.33.2" if LIBC_UCLIBC_V_0_9_33_2
 
+config LIBC_UCLIBC_NG_1_0_8_or_later
+    bool
+    select LIBC_UCLIBC_NG_1_0_0_or_later
+
+config LIBC_UCLIBC_NG_1_0_0_or_later
+    bool
+    select LIBC_UCLIBC_NG
+    select LIBC_UCLIBC_0_9_33_2_or_later
+
 config LIBC_UCLIBC_0_9_33_2_or_later
     bool
     select LIBC_SUPPORT_THREADS_NATIVE
@@ -65,6 +80,9 @@ config LIBC_UCLIBC_0_9_33_2_or_later
 config LIBC_UCLIBC_PARALLEL
     bool
 
+config LIBC_UCLIBC_NG
+    bool
+
 choice
     bool
     prompt "uClibc verbosity:"

config/libc/uClibc.in.2

@@ -50,6 +50,7 @@ config LIBC_UCLIBC_LOCALES_PREGEN_DATA
     bool
     prompt "Use pregen locales"
     depends on LIBC_UCLIBC_LOCALES
+    depends on ! LIBC_UCLIBC_NG
     default y
     help
       If you see issues with using pre-generated locales data,

patches/uClibc-ng/1.0.8/001-unistd-fix-if-condition.patch

@@ -0,0 +1,34 @@
+From 1e85892911bf016e9bb2a647b6584cdd806706f8 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Tue, 3 Nov 2015 15:32:23 +0100
+Subject: [PATCH] unistd: fix #if condition
+
+Commit dfa593d4d881116723a4401b466ea964fb12327b ("syncfs: add system
+call support") modified the #if condition around the definition of the
+syncfs() prototype in a way that doesn't build, causing build failures
+of any file including <unistd.h>:
+
+output/host/usr/powerpc-buildroot-linux-uclibc/sysroot/usr/include/unistd.h:988:14: error: #if with no expression
+ #if __USE_GNU
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ include/unistd.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/unistd.h b/include/unistd.h
+index 4701dab..40d6abd 100644
+--- a/include/unistd.h
++++ b/include/unistd.h
+@@ -1073,7 +1073,7 @@ extern char *getpass (const char *__prompt) __nonnull ((1));
+ extern int fsync (int __fd);
+ #endif /* Use BSD || X/Open || Unix98.  */
+ 
+-#if __USE_GNU
++#if defined __USE_GNU
+ /* Make all changes done to all files on the file system associated
+  *    with FD actually appear on disk.  */
+ extern int syncfs (int __fd) __THROW;
+-- 
+2.6.2
+

scripts/build/libc/uClibc.sh

@@ -7,15 +7,22 @@
 uclibc_locales_version=030818
 uclibc_local_tarball="uClibc-locale-${uclibc_locales_version}"
 
-# Download uClibc
-do_libc_get() {
+if [ "${CT_LIBC_UCLIBC_NG}" = "y" ]; then
+    uclibc_name="uClibc-ng"
+    libc_src="http://downloads.uclibc-ng.org/releases/${CT_LIBC_VERSION}"
+else
+    uclibc_name="uClibc"
     libc_src="http://www.uclibc.org/downloads
               http://www.uclibc.org/downloads/old-releases"
+fi
+
+# Download uClibc
+do_libc_get() {
     if [ "${CT_LIBC_UCLIBC_CUSTOM}" = "y" ]; then
-        CT_GetCustom "uClibc" "${CT_LIBC_VERSION}" \
+        CT_GetCustom "${uclibc_name}" "${CT_LIBC_VERSION}" \
                      "${CT_LIBC_UCLIBC_CUSTOM_LOCATION}"
     else
-        CT_GetFile "uClibc-${CT_LIBC_VERSION}" ${libc_src}
+        CT_GetFile "${uclibc_name}-${CT_LIBC_VERSION}" ${libc_src}
     fi
     # uClibc locales
     if [ "${CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA}" = "y" ]; then
@@ -33,9 +40,9 @@ do_libc_extract() {
     # custom location directory. Just use negate the whole test,
     # to keep it the same as for other components.
     if ! [ "${CT_LIBC_UCLIBC_CUSTOM}" = "y" \
-         -a -d "${CT_SRC_DIR}/uClibc-${CT_LIBC_VERSION}" ]; then
-        CT_Extract "uClibc-${CT_LIBC_VERSION}"
-        CT_Patch "uClibc" "${CT_LIBC_VERSION}"
+         -a -d "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}" ]; then
+        CT_Extract "${uclibc_name}-${CT_LIBC_VERSION}"
+        CT_Patch "${uclibc_name}" "${CT_LIBC_VERSION}"
     fi
 
     # uClibc locales
@@ -43,7 +50,7 @@ do_libc_extract() {
     # broken, so just link it in place...
     if [    "${CT_LIBC_UCLIBC_LOCALES_PREGEN_DATA}" = "y"           \
          -a ! -f "${CT_SRC_DIR}/.${uclibc_local_tarball}.extracted" ]; then
-        CT_Pushd "${CT_SRC_DIR}/uClibc-${CT_LIBC_VERSION}/extra/locale"
+        CT_Pushd "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}/extra/locale"
         CT_DoExecLog ALL ln -s "${CT_TARBALLS_DIR}/${uclibc_local_tarball}.tgz" .
         CT_Popd
         touch "${CT_SRC_DIR}/.${uclibc_local_tarball}.extracted"
@@ -77,7 +84,7 @@ do_libc_start_files() {
 
     # Simply copy files until uClibc has the ability to build out-of-tree
     CT_DoLog EXTRA "Copying sources to build dir"
-    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/uClibc-${CT_LIBC_VERSION}"   \
+    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}"   \
                             "${CT_BUILD_DIR}/build-libc-headers"
     cd "${CT_BUILD_DIR}/build-libc-headers"
 
@@ -161,7 +168,7 @@ do_libc() {
 
     # Simply copy files until uClibc has the ability to build out-of-tree
     CT_DoLog EXTRA "Copying sources to build dir"
-    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/uClibc-${CT_LIBC_VERSION}"   \
+    CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/${uclibc_name}-${CT_LIBC_VERSION}"   \
                             "${CT_BUILD_DIR}/build-libc"
     cd "${CT_BUILD_DIR}/build-libc"