- Fix support with new elftoolchain readelf(1)

- Fix not finding global symbols by checking for D and R.
- Follow symlinks
- Show which matching symbol was used to consider the library needed.

Discussed with:	bapt

tools/build/check-links.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # $FreeBSD$
 
-mime=$(file --mime-type $1)
+mime=$(file -L --mime-type $1)
 case $mime in
 *application/x-executable);;
 *application/x-sharedlib);;
@@ -10,16 +10,17 @@ esac
 
 # Check for useful libs
 list_libs=""
-for lib in $(readelf -d $1 | awk '$2 == "(NEEDED)" { sub(/\[/,"",$NF); sub(/\]/,"",$NF); print $NF }'); do
+for lib in $(readelf -d $1 | awk '$2 ~ /\(?NEEDED\)?/ { sub(/\[/,"",$NF); sub(/\]/,"",$NF); print $NF }'); do
         echo -n "checking if $lib is needed: "
         libpath=$(ldd $1 | awk -v lib=$lib '$1 == lib { print $3 }')
         list_libs="$list_libs $libpath"
         foundone=0
-        for fct in $(nm -D $libpath | awk '$2 == "T" || $2 == "W" || $2 == "B" { print $3 }'); do
+        for fct in $(nm -D $libpath | awk '$2 == "R" || $2 == "D" || $2 == "T" || $2 == "W" || $2 == "B" { print $3 }'); do
                 nm -D $1 | awk -v s=$fct '$1 == "U" && $2 == s { found=1 ; exit } END { if (found != 1) { exit 1 } }' && foundone=1 && break
         done
         if [ $foundone -eq 1 ]; then
-                echo "yes"
+                echo -n "yes... "
+                nm -D $1 | awk -v s=$fct '$1 == "U" && $2 == s { print $2 ; exit }'
         else
                 echo "no"
         fi
@@ -28,10 +29,9 @@ done
 for sym in $(nm -D $1 | awk '$1 == "U" { print $2 }'); do
         found=0
         for l in ${list_libs} ; do
-                nm -D $l | awk -v s=$sym '($2 == "T" || $2 == "W" || $2 == "B") && $3 == s { found=1 ; exit } END { if (found != 1) { exit 1 } }' && found=1 && break
+                nm -D $l | awk -v s=$sym '($2 == "R" || $2 == "D" || $2 == "T" || $2 == "W" || $2 == "B") && $3 == s { found=1 ; exit } END { if (found != 1) { exit 1 } }' && found=1 && break
         done
         if [ $found -eq 0 ]; then
                 echo "Unresolved symbol $sym"
         fi
 done
-