1 files changed, 23 insertions, 0 deletions
diff --git a/extract-dynsym b/extract-dynsym
new file mode 100755
index 0000000000..421dbd6fd0
--- /dev/null
+++ b/extract-dynsym
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+# Extract from an ELF shared object file just the dynamic symbols necessary
+# to link against it and the (GNU extension) warning sections that linking
+# against it may use to produce warning messages.
+
+infile=$1
+outfile=$2
+
+# Handle both objdump -h output formats.
+osechdr='^SECTION [0-9]+ \['
+nsechdr='^ +[0-9]+ '
+
+$OBJCOPY -S `$OBJDUMP -h $infile | $AWK "
+/($osechdr|$nsechdr)"'\.(hash|dyn[a-z]+|gnu\.warning[a-zA-Z_.]*) / { next; }
+/'"$osechdr"'/ { printf "--remove-section=%s ", $3 }
+/'"$nsechdr"'/ { printf "--remove-section=%s ", $2 }
+' |
+# The old format puts brackets around section names.  The new format fails
+# to delimit long section names from the following hex digits.
+sed -e 's/[][]//g' -e 's/0[0-9a-f]* / /g'` $infile $outfile.new
+
+mv -f $outfile.new $outfile