make: optionally add gcc lto flags

This commit enables building using link time optimization when specifying "LTO=yes" in the application's Makefile.
8 years ago · 9cf054fe96
1 changed files with 6 additions and 0 deletions
--- a/Makefile.cflags
+++ b/Makefile.cflags
@ -41,3 +41,9 @@ endif

 # Unwanted flags for c++
 CXXUWFLAGS += -std=%
+
+ifeq ($(LTO),yes)
+  LTOFLAGS = -flto -ffat-lto-objects
+  CFLAGS += ${LTOFLAGS}
+  LINKFLAGS += ${LTOFLAGS}
+endif