Added proper detection of tar utility. We need gnutar on OS X.

diff --git a/summon-arm-toolchain b/summon-arm-toolchain
index 2a70d09b11c010c28c6007450d6b9eb07a4120e4..760522c18db90fd3971511209458df0fe70a7c7e 100755 (executable)
--- a/summon-arm-toolchain
+++ b/summon-arm-toolchain
@@ -91,6 +91,37 @@ SUMMON_DIR=$(pwd)
 SOURCES=${SUMMON_DIR}/sources
 STAMPS=${SUMMON_DIR}/stamps
 
+##############################################################################
+# OS and Tooldetection section
+# Detects which tools to use
+##############################################################################
+
+case "$(uname)" in
+       Linux)
+       echo "Found Linux OS."
+       TAR=tar
+       ;;
+       Darwin)
+       echo "Found Darwin OS."
+       GCCFLAGS="${GCCFLAGS} \
+                  --with-gmp=${DARWIN_OPT_PATH} \
+                 --with-mpfr=${DARWIN_OPT_PATH} \
+                 --with-mpc=${DARWIN_OPT_PATH} \
+                 -with-libiconv-prefix=${DARWIN_OPT_PATH}"
+        if ! which gnutar > /dev/null ; then
+               echo "ERROR: GNU tar not found! (try 'sudo port install gnutar')"
+               exit 1
+       else
+               echo "GNU tar found!"
+               TAR=gnutar
+       fi
+       ;;
+       *)
+       echo "Found unknown OS. Aborting!"
+       exit 1
+       ;;
+esac
+
 ##############################################################################
 # Building section
 # You probably don't have to touch anything after this
@@ -116,7 +147,7 @@ function log {
 function unpack {
     log Unpacking $*
     # Use 'auto' mode decompression.  Replace with a switch if tar doesn't support -a
-    tar xaf${TARFLAGS} ${SOURCES}/$1.tar.*
+    ${TAR} xaf${TARFLAGS} ${SOURCES}/$1.tar.*
 }
 
 # Install a build
@@ -125,23 +156,6 @@ function install {
     ${SUDO} make ${MAKEFLAGS} $2 $3 $4 $5 $6 $7 $8
 }
 
-case "$(uname)" in
-       Linux)
-       echo "Found Linux OS."
-       ;;
-       Darwin)
-       echo "Found Darwin OS."
-       GCCFLAGS="${GCCFLAGS} \
-                  --with-gmp=${DARWIN_OPT_PATH} \
-                 --with-mpfr=${DARWIN_OPT_PATH} \
-                 --with-mpc=${DARWIN_OPT_PATH} \
-                 -with-libiconv-prefix=${DARWIN_OPT_PATH}"
-       ;;
-       *)
-       echo "Found unknown OS. Aborting!"
-       exit 1
-       ;;
-esac
 
 mkdir -p ${STAMPS} ${SOURCES}