From 5abf6b5d7c1703b3bccd7781e64b96c5284609ec Mon Sep 17 00:00:00 2001
From: Jorge Aparicio <japaricious@gmail.com>
Date: Sat, 13 Aug 2016 12:26:58 -0500
Subject: [PATCH] check presence of weak symbols

---
 ci/script.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ci/script.sh b/ci/script.sh
index 3b00ff6..c271456 100644
--- a/ci/script.sh
+++ b/ci/script.sh
@@ -9,10 +9,21 @@ build() {
 
 inspect() {
     $PREFIX$NM -g --defined-only target/**/debug/*.rlib
+
     set +e
     $PREFIX$OBJDUMP -Cd target/**/debug/*.rlib
     $PREFIX$OBJDUMP -Cd target/**/release/*.rlib
     set -e
+
+    # Check presence of weak symbols
+    case $TRAVIS_OS_NAME in
+        linux)
+            local symbols=( memcmp memcpy memmove memset )
+            for symbol in "${symbols[@]}"; do
+                $PREFIX$NM target/**/debug/*.rlib | grep -q "W $symbol"
+            done
+            ;;
+    esac
 }
 
 run_tests() {