initial tests

libbuild

@@ -0,0 +1,37 @@
+#!/bin/sh
+
+dir="$(dirname "$0")"
+. "$dir"/cflags
+
+tmp=$(mktemp -d)
+
+hide_unnecessary_symbols() {
+  [ ! -d "$tmp" ] && echo "W: couldn't find tmp dir" && return
+  gcc_syms="$tmp/gcc_exports.sym"
+  clang_syms="$tmp/clang_exports.list"
+  code="$tmp/main.c"
+  echo "int main() { return 0; }" >> "$code"
+  exports='ezpp ezpp_ errstr oppai_'
+  ( printf '{global:'
+    for e in $exports; do
+      printf '%s;' "$e"
+    done
+    printf 'local:*;};' ) | sed 's/_;/_*;/g' >"$gcc_syms"
+  echo "$exports" | tr ' ' '\n' | sed s/_$/_*/g > "$clang_syms"
+  for flags in "-Wl,--version-script=$gcc_syms" \
+               "-Wl,-exported_symbols_list,$clang_syms"
+  do
+    if "$cc" $flags "$code" -o /dev/null >/dev/null 2>&1; then
+      ldflags="$ldflags $flags"
+      return
+    fi
+  done
+  echo "W: can't figure out how to hide unnecessary symbols"
+}
+
+hide_unnecessary_symbols
+
+$cc -shared $cflags -DOPPAI_EXPORT \
+  "$@" oppai.c $ldflags -fpic -o liboppai.so
+
+[ -d "$tmp" ] && rm -rf "$tmp"