From 25dc671f8b36ed62a1d2b689347902a122493782 Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=B4me=20Benoit?= <jerome.benoit@piment-noir.org>
Date: Wed, 15 Mar 2017 11:42:43 +0100
Subject: [PATCH] TP 13 exo1: Add LTO and GOLD support to the Makefile build
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Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
---
 TP_11/exo2/Makefile    |  2 +-
 TP_13/exo1/Makefile    | 21 +++++++++++++++++----
 TP_13/exo1/lib/utils.c |  2 +-
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/TP_11/exo2/Makefile b/TP_11/exo2/Makefile
index 73f0988..d1ca467 100644
--- a/TP_11/exo2/Makefile
+++ b/TP_11/exo2/Makefile
@@ -50,7 +50,7 @@ OPTI_FLAG = -O3
 endif
 
 # Putting header files in the source directory is not the purpose of this INCLUDES variable
-INCLUDES := $(INCLUDES) -I$(SRC_PATH) -I$(LIBRARY_PATH)
+INCLUDES := $(INCLUDES) -I$(LIBRARY_PATH)
 CFLAGS := $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) $(INCLUDES)
 LIBCFLAGS := -fPIC $(CFLAGS)
 LDFLAGS := $(LDFLAGS) $(STRIP_FLAG)
diff --git a/TP_13/exo1/Makefile b/TP_13/exo1/Makefile
index fd95878..0e2661f 100644
--- a/TP_13/exo1/Makefile
+++ b/TP_13/exo1/Makefile
@@ -21,8 +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
@@ -42,18 +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
 
 # Putting header files in the source directory is not the purpose of this INCLUDES variable
 INCLUDES := $(INCLUDES) -I$(LIBRARY_PATH)
-CFLAGS := $(CFLAGS) $(WARN_FLAGS) $(STD_FLAG) $(OPTI_FLAG) $(DEBUG_FLAG) $(INCLUDES)
+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)
diff --git a/TP_13/exo1/lib/utils.c b/TP_13/exo1/lib/utils.c
index fbd7e01..5139bae 100644
--- a/TP_13/exo1/lib/utils.c
+++ b/TP_13/exo1/lib/utils.c
@@ -17,7 +17,7 @@ void swap_ptr(void* v1, void* v2) {
 void handle_prompt_error(int errno) {
     if (errno != 0) {
         printf("\nMerci de saisir un nombre entier, exiting\n");
-        /*  it's somewhat violent but better than looping forever */
+        /* it's somewhat violent but better than looping forever */
         exit(EXIT_FAILURE);
     }
 }
-- 
2.34.1