| 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] |
| ]) |
