# HG changeset patch
# User Johannes Stezenbach <js@sig21.net>
# Date 1280424637 -7200
# Node ID ace1d90c9b157dfa96787ef9f8c49dcd28546344
# Parent  471acb219d7758400772c3be486e1176ac5cdead
scripts: remove . from $PATH

Add CT_SanitizePath function which removes entries referring to ., /tmp
and non-existing directories from $PATH, and call it early in the
build script.

If . is in PATH, gcc-4.4.4 build breaks:

[ALL  ]    checking what assembler to use...
/tmp/build/targets/arm-unknown-linux-uclibcgnueabi/build/gcc-core-static/arm-unknown-linux-uclibcgnueabi/bin/as
...
[ALL  ]    config.status: creating as

i.e. "as" is supposed to be the arm-unknown-linux-uclibcgnueabi cross assembler,
but config.status creates a local "as" script which is calling the
host assembler.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
[Yann E. MORIN: style fixes + explanations]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 20dd8cef1c8adff0aa3e78ae6d7acfbc45ed5a83)

diff -r 471acb219d77 -r ace1d90c9b15 scripts/crosstool-NG.sh.in
--- a/scripts/crosstool-NG.sh.in	Mon Jul 19 23:16:02 2010 +0200
+++ b/scripts/crosstool-NG.sh.in	Thu Jul 29 19:30:37 2010 +0200
@@ -28,6 +28,9 @@
 # Overide the locale early, in case we ever translate crosstool-NG messages
 [ -z "${CT_NO_OVERIDE_LC_MESSAGES}" ] && export LC_ALL=C
 
+# remove . from PATH since it can cause gcc build failures
+CT_SanitizePath
+
 # Some sanity checks in the environment and needed tools
 CT_DoLog INFO "Performing some trivial sanity checks"
 CT_TestAndAbort "Don't set LD_LIBRARY_PATH. It screws up the build." -n "${LD_LIBRARY_PATH}"
diff -r 471acb219d77 -r ace1d90c9b15 scripts/functions
--- a/scripts/functions	Mon Jul 19 23:16:02 2010 +0200
+++ b/scripts/functions	Thu Jul 29 19:30:37 2010 +0200
@@ -137,6 +137,24 @@
     CT_DoLog ${level:-INFO} "(elapsed: ${elapsed_min}:${elapsed_sec}.${elapsed_csec})"
 }
 
+# Remove entries referring to ., /tmp and non-existing directories from $PATH
+# Usage: CT_SanitizePath
+CT_SanitizePath() {
+    local new
+    local tmp
+    local IFS=:
+    for p in $PATH; do
+        # Replace any occurence of . with $(pwd -P)
+        # Use /tmp as a default if the directory is non-existent
+        # Do not add /tmp in the PATH
+        tmp="$( cd /tmp; cd "${p}" 2>/dev/null || true; pwd -P )"
+        if [ "${tmp}" != "/tmp" ]; then
+            new="${new}${new:+:}${p}"
+        fi
+    done
+    PATH="${new}"
+}
+
 # Abort the execution with an error message
 # Usage: CT_Abort <message>
 CT_Abort() {