gentoo-overlay/dev-lang/spidermonkey/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
	<maintainer type="project">
		<email>mozilla@gentoo.org</email>
		<name>Gentoo Mozilla Team</name>
	</maintainer>
	<use>
		<flag name="clang">Use Clang compiler instead of GCC</flag>
		<flag name="custom-optimization">Build with user-specified compiler optimizations
			(-Os, -O0, -O1, -O2, -O3) from CFLAGS (unsupported)</flag>
		<flag name="debug">Enable assertions to allow for easier debugging of programs that link to spidermonkey -- note this will often crash software on regular end-user systems</flag>
		<flag name="lto">Enable Link Time Optimization (LTO)</flag>
		<flag name="system-icu">Use the system-wide <pkg>dev-libs/icu</pkg> instead of bundled -- note, only takes effect when icu flag is enabled</flag>
	</use>
</pkgmetadata>