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create_expfile.sh

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#!/bin/sh

# Writes out all of the exported symbols to a file.

# This is needed on AIX as symbols are not exported

# by an executable by default and need to be listed

# specifically for export so that they can be used

# by native add-ons.

# The raw symbol data is obtained by using nm on

# the .a files which make up the node executable.

# -Xany processes symbols for both 32-bit and

# 64-bit (the default is for 32-bit only).

# -g selects only exported symbols.

# -C, -B and -p ensure that the output is in a

# format that can be easily parsed and converted

# into the required symbol.

# -C suppresses the demangling of C++ names.

# -B writes the output in BSD format.

# -p displays the info in a standard portable

# output format.

# Only include symbols if they are of the following

# types and don't start with a dot.

# T - Global text symbol.

# D - Global data symbol.

# B - Global bss symbol.

# The final sort allows removal of any duplicates.

# Symbols for the gtest libraries are excluded as

# they are not linked into the node executable.

echo "Searching $1 to write out expfile to $2"

# This special sequence must be at the start of the exp file.

echo "#!." > "$2.tmp"

# Pull the symbols from the .a files.

find "$1" -name "*.a" | grep -v gtest \

| xargs nm -Xany -BCpg \

| awk '{

if ((($2 == "T") || ($2 == "D") || ($2 == "B")) &&

(substr($3,1,1) != ".")) { print $3 }

}' \

| sort -u >> "$2.tmp"

mv -f "$2.tmp" "$2"