added mold, fixed some flags

1 files changed, 6 insertions, 0 deletions

diff --git a/buildenv_ext.conf b/buildenv_ext.conf
new file mode 100644
index 000000000000..e034fa916c3b
--- /dev/null
+++ b/buildenv_ext.conf
@@ -0,0 +1,6 @@
+#-- lto{,-clang}:      Use monolithic link-time optimization (use "lto-clang" for clang/llvm)
+#-- lto-thin{,-clang}: Use partitioned link-time optimization (use "lto-thin-clang" for clang/llvm)
+#-- pgo:               Generate or utilize profile guided optimization (requires two build and install cycles)
+#-- {graphite,polly}:  Use polyhedral model optimization (use "polly" for clang/llvm)
+#-- rice{,-clang}:     Use extreme and unsafe optimization (use "rice-clang" for clang/llvm)
+#-- mold:              Use the fast mold linker (does not work with lto, and for gcc versions under 12)