replaced deprecated use of backticks

The $(...) notation is meant to be used as a replacement for backticks
 `...`

Signed-off-by: Olivier Gayot <duskcoder@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 689b79f..743e0bc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC       ?= gcc
-CFLAGS   += -W -Wall -std=c99 -Wextra `sdl-config --cflags`
-LDFLAGS  += `sdl-config --libs` -lSDL_image -lSDL_ttf
+CFLAGS   += -W -Wall -std=c99 -Wextra $(shell sdl-config --cflags)
+LDFLAGS  += $(shell sdl-config --libs) -lSDL_image -lSDL_ttf
 NAME      = a.out
 SRC       = $(wildcard *.c)