build system: actually detect lack of --warn-common

Commit 992387539 (build system: more clang/llvm tweaks) falsely
claimed that the lack of the --warn-common linker option was being
detected.

It wasn't, but it is now.

1 files changed, 7 insertions, 1 deletions

diff --git a/scripts/trylink b/scripts/trylink
index 776fd484a..2456252a3 100755
--- a/scripts/trylink
+++ b/scripts/trylink
@@ -93,10 +93,16 @@ if ! check_cc "-Wl,--sort-section,alignment"; then
     SORT_SECTION=""
 fi
 
+WARN_COMMON="-Wl,--warn-common"
+if ! check_cc "-Wl,--warn-common"; then
+    echo "Your linker does not support --warn-common"
+    WARN_COMMON=""
+fi
+
 START_GROUP="-Wl,--start-group"
 END_GROUP="-Wl,--end-group"
 INFO_OPTS() {
-        echo "$SORT_COMMON -Wl,-Map,$EXE.map -Wl,--verbose"
+        echo "$WARN_COMMON -Wl,-Map,$EXE.map -Wl,--verbose"
 }
 
 # gold may not support --sort-common (yet)