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dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
dnl check if the build is using lto. This is really primitive and only detects llvm based
dnl compilers right now.
AC_DEFUN([MOZ_DOING_LTO],
[
cat > conftest.c <<EOF
int foo = 1;
EOF
$1=no
if ${CC-cc} ${CFLAGS} -S conftest.c -o conftest.s >/dev/null 2>&1; then
if grep '^target triple =' conftest.s; then
$1=yes
fi
fi
rm -f conftest.[cs]
])
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