buildtools: make experimental symbol check lighter

Dumping every object file for every symbol is too heavy.
Use a temporary storage.

Before:
$ rm -rf master && make defconfig O=master
$ time make EXTRA_CFLAGS=-g O=master
[...]
real	2m24.063s
user	1m16.985s
sys	1m46.372s

After:
$ rm -rf master && make defconfig O=master
$ time make EXTRA_CFLAGS=-g O=master
[...]
real	1m37.110s
user	0m49.417s
sys	0m51.803s

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>

diff --git a/buildtools/check-experimental-syms.sh b/buildtools/check-experimental-syms.sh
index 0f6c62d..47a06fc 100755 (executable)
--- a/buildtools/check-experimental-syms.sh
+++ b/buildtools/check-experimental-syms.sh
@@ -18,14 +18,15 @@ then
        exit 0
 fi
 
+DUMPFILE=$(mktemp -t dpdk.${0##*/}.XXX.objdump)
+trap 'rm -f "$DUMPFILE"' EXIT
+objdump -t $OBJFILE >$DUMPFILE
+
 ret=0
 for SYM in `$LIST_SYMBOL -S EXPERIMENTAL $MAPFILE`
 do
-       objdump -t $OBJFILE | grep -q "\.text.*$SYM$"
-       IN_TEXT=$?
-       objdump -t $OBJFILE | grep -q "\.text\.experimental.*$SYM$"
-       IN_EXP=$?
-       if [ $IN_TEXT -eq 0 -a $IN_EXP -ne 0 ]
+       if grep -q "\.text.*$SYM$" $DUMPFILE &&
+               ! grep -q "\.text\.experimental.*$SYM$" $DUMPFILE
        then
                cat >&2 <<- END_OF_MESSAGE
                $SYM is not flagged as experimental
@@ -37,11 +38,11 @@ do
 done
 
 # Filter out symbols suffixed with a . for icc
-for SYM in `objdump -t $OBJFILE |awk '{
+for SYM in `awk '{
        if ($2 != "l" && $4 == ".text.experimental" && !($NF ~ /\.$/)) {
                print $NF
        }
-}'`
+}' $DUMPFILE`
 do
        $LIST_SYMBOL -S EXPERIMENTAL -s $SYM -q $MAPFILE || {
                cat >&2 <<- END_OF_MESSAGE