build-rr: throw an explicit error if cc/ld version check fails

diff --git a/build-rr.sh b/build-rr.sh
index 52b896ea975655db967a70addb748f9526094f21..b65b6ed25f60e31c70a543d58c161fc95d56a5f4 100755 (executable)
--- a/build-rr.sh
+++ b/build-rr.sh
@@ -312,7 +312,8 @@ checktools ()
        vers=$(${CC:-cc} -E -dM - < /dev/null | awk '
            /__GNUC__/ {version += 100*$3}
            /__GNUC_MINOR__/ {version += $3}
-           END { print version; if (version) exit 0; exit 1; }')
+           END { print version; if (version) exit 0; exit 1; }') \
+               || unable to probe cc version
        if [ ${vers} -lt 406 ]; then
                die gcc is too old, need 4.6 or later. ${CC:+(\$CC: $CC)}
        elif [ ${vers} -lt 408 ]; then
@@ -327,7 +328,8 @@ checktools ()
        # check that ld is modern enough
        vers=$(${CC:-cc} -Wl,--version 2>&1 | awk '
            /GNU ld.*Binutils/{version += 100*$NF}
-           END { print version; if (version) exit 0; exit 1; }')
+           END { print version; if (version) exit 0; exit 1; }') \
+               || die unable to probe ld version
        if [ ${vers} -lt 222 ]; then
                die ld is too old, need 2.22 or later. probed version: ${vers}
        elif [ ${vers} -lt 225 ]; then