TP 13 exo1: Add LTO and GOLD support to the Makefile build options

[TD_C.git] / TP_13 / exo1 / Makefile

diff --git a/TP_13/exo1/Makefile b/TP_13/exo1/Makefile
index a75a2f173f16a4af808c9aa015cc5389583ed3c8..0e2661f1a1bf58e01246ab349ba383299ede1ad8 100644 (file)
--- a/TP_13/exo1/Makefile
+++ b/TP_13/exo1/Makefile
@@ -1,10 +1,13 @@
 # Sample Makefile to build simple project.
 #
 # This Makefile expect all source files (.c) to be at the same level, in the
-# current working directory.
+# $(SRC_PATH) directory.
+#
+# This Makefile expect all embedded library source files (.c) to be at the same level, in the
+# $(LIBRARY_PATH) directory.
 #
 # It will automatically generate dependencies, compile all files, and produce a
-# binary using the provided name.
+# binary using the provided name linked against the library if necessary.
 #
 # Set BINARY_NAME to the name of the binary file to build.
 # Set LIBRARY_NAME to the name of the library file to build.
@@ -18,8 +21,8 @@ BINARY_NAME=exo1
 SRC_PATH:=src
 LIBRARY_NAME=libexo1
 LIBRARY_PATH:=lib
-BUILD_TYPE=debug
-#BUILD_TYPE=release
+#BUILD_TYPE=debug
+BUILD_TYPE=release
 
 # ====================================
 # DO NOT CHANGE STUFF BEYOND THIS LINE
@@ -39,18 +42,31 @@ BUILDDIR := .build/debug
 DEBUG_FLAG = -g
 STRIP_FLAG =
 OPTI_FLAG = -O0
+LTO_SUPPORT = no
+GOLD_SUPPORT = no
 else
 BUILDDIR := .build/release
 DEBUG_FLAG =
 STRIP_FLAG = -s
 OPTI_FLAG = -O3
+LTO_SUPPORT = yes
+GOLD_SUPPORT = yes
+endif
+
+ifeq ($(LTO_SUPPORT),yes)
+CFLAGS_LTO = -flto -ffat-lto-objects
+LDFLAGS_LTO = -fuse-linker-plugin -flto
+endif
+
+ifeq ($(GOLD_SUPPORT),yes)
+LDFLAGS_GOLD = -fuse-ld=gold
 endif
 
-# Puting header files in the source directory is not the purpose of this INCLUDES variable
-INCLUDES := $(INCLUDES) -I$(SRC_PATH) -I$(LIBRARY_PATH)
-CFLAGS := $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) $(INCLUDES)
+# Putting header files in the source directory is not the purpose of this INCLUDES variable
+INCLUDES := $(INCLUDES) -I$(LIBRARY_PATH)
+CFLAGS := $(CFLAGS) $(CFLAGS_LTO) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) $(INCLUDES)
 LIBCFLAGS := -fPIC $(CFLAGS)
-LDFLAGS := $(LDFLAGS) $(STRIP_FLAG)
+LDFLAGS := $(LDFLAGS) $(LDFLAGS_LTO) $(LDFLAGS_GOLD) $(STRIP_FLAG)
 LIBLDFLAGS := -shared $(LDFLAGS)
 STATICLIBLDFLAGS := -static $(LDFLAGS)
 LDLIBS := $(LDLIBS) -L$(LIBRARY_PATH) -l$(BINARY_NAME)