tests: add e_machine endianness test (#269)

tests/Makefile.am

@@ -27,7 +27,8 @@ src_TESTS = \
   output-flag.sh \
   no-rpath-pie-powerpc.sh \
   build-id.sh \
-  invalid-elf.sh
+  invalid-elf.sh \
+  endianness.sh
 
 build_TESTS = \
   $(no_rpath_arch_TESTS)

tests/endianness.sh

@@ -0,0 +1,24 @@
+#! /bin/sh -e
+SCRATCH=scratch/$(basename $0 .sh)
+PATCHELF="../src/patchelf"
+
+for arch in ppc64 ppc64le; do
+    rm -rf ${SCRATCH}
+    mkdir -p ${SCRATCH}
+
+    cp endianness/${arch}/main endianness/${arch}/libtest.so ${SCRATCH}/
+
+    rpath="${PWD}/${SCRATCH}"
+
+    # set rpath to scratch dir
+    ${PATCHELF} --output ${SCRATCH}/main-rpath --set-rpath $rpath ${SCRATCH}/main
+
+    # attempt to shrink rpath, should not result in empty rpath
+    ${PATCHELF} --output ${SCRATCH}/main-shrunk --shrink-rpath --debug ${SCRATCH}/main-rpath 
+
+    # check whether rpath is still present
+    if ! ${PATCHELF} --print-rpath ${SCRATCH}/main-shrunk | grep -q "$rpath"; then
+        echo "rpath was removed for ${arch}"
+	exit 1
+    fi
+done

tests/endianness/Makefile

@@ -0,0 +1,3 @@
+all:
+	$(CC) -xc -nostdlib -shared -o libtest.so - <<< 'void test() {}'
+	$(CC) -xc -nostdlib -L. -ltest -o main - <<< 'void _start() {}'