1 files changed, 10 insertions, 1 deletions
diff --git a/src/gbm/gbm-symbols-check b/src/gbm/gbm-symbols-check
index 2444131e99..cf57a08d57 100755
--- a/src/gbm/gbm-symbols-check
+++ b/src/gbm/gbm-symbols-check
@@ -1,6 +1,15 @@
 #!/bin/sh
+set -eu
 
-FUNCS=$(nm -D --defined-only ${1-.libs/libgbm.so} | grep -o "T .*" | cut -c 3- | while read func; do
+LIB=${1-.libs/libgbm.so}
+
+if ! [ -f "$LIB" ]
+then
+  exit 1
+fi
+
+
+FUNCS=$(nm -D --defined-only $LIB | grep -o "T .*" | cut -c 3- | while read func; do
 ( grep -q "^$func$" || echo $func )  <<EOF
 gbm_device_get_fd
 gbm_device_get_backend_name