Revert "toolchain: allow side by side sysroot directories"

This reverts commit 9a1e9efe2618ebbf12ed2567bcd6e8cca5619547.

Currently Codescape toolchains cannot be used to generate a big endian
root file system because the support for side by side sysroots is not
complete.

There is a patch [1] waiting in the queue which fixes the issue for the
current version of Codescape toolchains we have, but it will not work
for the next one that is coming. So, instead of messing more with the
toolchain infra I think it's better to handle these specific Codescape
toolchain's weirdness in hooks which won't affect others.

[1]: http://patchwork.ozlabs.org/patch/571708/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

toolchain/helpers.mk

@@ -50,22 +50,10 @@ copy_toolchain_lib_root = \
 # corresponding architecture variants), and we don't want to import
 # them.
 #
-# Then, we need to support two types of multilib toolchains:
+# Then, if the selected architecture variant is not the default one
+# (i.e, if SYSROOT_DIR != ARCH_SYSROOT_DIR), then we :
 #
-#  - The toolchains that have nested sysroots: a main sysroot, and
-#    then additional sysroots available as subdirectories of the main
-#    one. This is for example used by Sourcery CodeBench toolchains.
-#
-#  - The toolchains that have side-by-side sysroots. Each sysroot is a
-#    complete one, they simply leave one next to each other. This is
-#    for example used by MIPS Codescape toolchains.
-#
-# So, we first detect if the selected architecture variant is not the
-# default one (i.e, if SYSROOT_DIR != ARCH_SYSROOT_DIR).
-#
-# If we are in the situation of a nested sysroot, we:
-#
-#  * If needed, import the header files from the default architecture
+#  * Import the header files from the default architecture
 #    variant. Header files are typically shared between the sysroots
 #    for the different architecture variants. If we use the
 #    non-default one, header files were not copied by the previous
@@ -79,14 +67,10 @@ copy_toolchain_lib_root = \
 #    non-default architecture variant is used. Without this, the
 #    compiler fails to find libraries and headers.
 #
-# If we are in the situation of a side-by-side sysroot, we:
-#
-# * Create a symbolic link
-#
-# Finally, some toolchains (i.e Linaro binary toolchains) store
-# support libraries (libstdc++, libgcc_s) outside of the sysroot, so
-# we simply copy all the libraries from the "support lib directory"
-# into our sysroot.
+# Some toolchains (i.e Linaro binary toolchains) store support
+# libraries (libstdc++, libgcc_s) outside of the sysroot, so we simply
+# copy all the libraries from the "support lib directory" into our
+# sysroot.
 #
 # Note that the 'locale' directories are not copied. They are huge
 # (400+MB) in CodeSourcery toolchains, and they are not really useful.
@@ -111,25 +95,18 @@ copy_toolchain_sysroot = \
 				$${ARCH_SYSROOT_DIR}/$$i/ $(STAGING_DIR)/$$i/ ; \
 		fi ; \
 	done ; \
-	SYSROOT_DIR_CANON=`readlink -f $${SYSROOT_DIR}` ; \
-	ARCH_SYSROOT_DIR_CANON=`readlink -f $${ARCH_SYSROOT_DIR}` ; \
-	if [ $${SYSROOT_DIR_CANON} != $${ARCH_SYSROOT_DIR_CANON} ] ; then \
-		relpath="./" ; \
-		if [ $${ARCH_SYSROOT_DIR_CANON:0:$${\#SYSROOT_DIR_CANON}} == $${SYSROOT_DIR_CANON} ] ; then \
-			if [ ! -d $${ARCH_SYSROOT_DIR}/usr/include ] ; then \
-				cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
-			fi ; \
-			mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
-			nbslashs=`printf $${ARCH_SUBDIR} | sed 's%[^/]%%g' | wc -c` ; \
-			for slash in `seq 1 $${nbslashs}` ; do \
-				relpath=$${relpath}"../" ; \
-			done ; \
-			ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
-			echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
-		elif [ `dirname $${ARCH_SYSROOT_DIR_CANON}` == `dirname $${SYSROOT_DIR_CANON}` ] ; then \
-			ln -snf $${relpath} $(STAGING_DIR)/`basename $${ARCH_SYSROOT_DIR_CANON}` ; \
-			echo "Symlinking $(STAGING_DIR)/`basename $${ARCH_SYSROOT_DIR_CANON}` -> $${relpath}" ; \
+	if [ `readlink -f $${SYSROOT_DIR}` != `readlink -f $${ARCH_SYSROOT_DIR}` ] ; then \
+		if [ ! -d $${ARCH_SYSROOT_DIR}/usr/include ] ; then \
+			cp -a $${SYSROOT_DIR}/usr/include $(STAGING_DIR)/usr ; \
 		fi ; \
+		mkdir -p `dirname $(STAGING_DIR)/$${ARCH_SUBDIR}` ; \
+		relpath="./" ; \
+		nbslashs=`printf $${ARCH_SUBDIR} | sed 's%[^/]%%g' | wc -c` ; \
+		for slash in `seq 1 $${nbslashs}` ; do \
+			relpath=$${relpath}"../" ; \
+		done ; \
+		ln -s $${relpath} $(STAGING_DIR)/$${ARCH_SUBDIR} ; \
+		echo "Symlinking $(STAGING_DIR)/$${ARCH_SUBDIR} -> $${relpath}" ; \
 	fi ; \
 	if test -n "$${SUPPORT_LIB_DIR}" ; then \
 		cp -a $${SUPPORT_LIB_DIR}/* $(STAGING_DIR)/lib/ ; \