From e2fcea07eca10bf925e450dc1c2ce60735da16c2 Mon Sep 17 00:00:00 2001
From: Niklas Halle <niklas@niklashalle.net>
Date: Tue, 21 Apr 2020 23:05:26 +0200
Subject: initial - basic makefile and main.c

---
 Makefile | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Makefile

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..647ebcd
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,53 @@
+# if $CC is not set, use gcc as a sensible default
+CC ?= gcc
+RM ?= rm -fv
+
+# if $CFLAGS is not set, be very pedantic and compile
+# as C11, that should catch some common errors, also
+# fortify the source, which is a must for security.
+CFLAGS ?= -Wall \
+    -D_FORTIFY_SOURCE=2 \
+    -Wextra -Wcast-align -Wcast-qual -Wpointer-arith \
+    -Waggregate-return -Wunreachable-code -Wfloat-equal \
+    -Wformat=2 -Wredundant-decls -Wundef \
+    -Wdisabled-optimization -Wshadow -Wmissing-braces \
+    -Wstrict-aliasing=2 -Wstrict-overflow=5 -Wconversion \
+    -Wno-unused-parameter \
+    -pedantic -std=c11
+
+CFLAGS_DEBUG := -g3 \
+    -O \
+    -DDEBUG
+
+CFLAGS_RELEASE := -O2 \
+    -DNDEBUG \
+    -march=native \
+    -mtune=native \
+    -ftree-vectorize
+
+# the default target is debug
+all: debug
+
+# clean target, removing all .o and the executable
+clean:
+	$(RM) *o bs_exe
+
+# when the target is debug,
+# add CFLAGS_DEBUG to CFLAGS
+debug: CFLAGS += $(CFLAGS_DEBUG)
+debug: clean bs_exe
+
+# when the target is release,
+# add CFLAGS_RELEASE to CFLAGS
+release: CFLAGS += $(CFLAGS_RELEASE)
+release: clean bs_exe
+
+bs_exe: main.o
+	$(CC) $^ -o $@ $(CFLAGS)
+
+# when looking for something that ends in .o, look
+# for the same thing ending in .c and run gcc on it
+%.o: %.c
+	$(CC) -c $< $(CFLAGS)
+
+.PHONY: debug release clean
\ No newline at end of file
-- 
cgit v1.2.3-54-g00ecf