scripts: fix double slash in paths

Computed paths may contain double slashes.
This is not an issue but it is just ugly to look at.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

scripts/crosstool-NG.sh.in

@@ -295,6 +295,7 @@ if [ -z "${CT_RESTART}" ]; then
         CT_SYSROOT_DIR="${CT_PREFIX_DIR}/${CT_TARGET}/${CT_SYSROOT_DIR_PREFIX}/${CT_SYSROOT_NAME}"
         CT_DEBUGROOT_DIR="${CT_PREFIX_DIR}/${CT_TARGET}/${CT_SYSROOT_DIR_PREFIX}/debug-root"
         CT_HEADERS_DIR="${CT_SYSROOT_DIR}/usr/include"
+        CT_SanitiseVarDir CT_SYSROOT_DIR CT_DEBUGROOT_DIR CT_HEADERS_DIR 
         BINUTILS_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"
         CC_CORE_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"
         CC_SYSROOT_ARG="--with-sysroot=${CT_SYSROOT_DIR}"
@@ -308,6 +309,7 @@ if [ -z "${CT_RESTART}" ]; then
         CT_SYSROOT_DIR="${CT_PREFIX_DIR}/${CT_TARGET}"
         CT_DEBUGROOT_DIR="${CT_SYSROOT_DIR}"
         CT_HEADERS_DIR="${CT_SYSROOT_DIR}/include"
+        CT_SanitiseVarDir CT_SYSROOT_DIR CT_DEBUGROOT_DIR CT_HEADERS_DIR 
         # hack!  Always use --with-sysroot for binutils.
         # binutils 2.14 and later obey it, older binutils ignore it.
         # Lets you build a working 32->64 bit cross gcc

scripts/functions

@@ -159,6 +159,24 @@ CT_SanitizePath() {
     PATH="${new}"
 }
 
+# Sanitise the directory name contained in the variable passed as argument:
+# - remove duplicate /
+# Usage: CT_SanitiseVarDir CT_PREFIX_DIR
+CT_SanitiseVarDir() {
+    local var
+    local old_dir
+    local new_dir
+
+    for var in "$@"; do
+        eval "old_dir=\"\${${var}}\""
+        new_dir="$( printf "${old_dir}"     \
+                    |sed -r -e 's:/+:/:g;'  \
+                  )"
+        eval "${var}=\"${new_dir}\""
+        CT_DoLog DEBUG "Sanitised '${var}': '${old_dir}' -> '${new_dir}'"
+    done
+}
+
 # Abort the execution with an error message
 # Usage: CT_Abort <message>
 CT_Abort() {