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

---
 .gitignore |  3 +++
 Makefile   | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 main.c     | 21 +++++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7623090
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.idea
+*.o
+*_exe
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
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..4f4e1a9
--- /dev/null
+++ b/main.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+#if !defined(NDEBUG)
+    #define TRACE(MSG) \
+        fprintf(stderr, "%s\n", #MSG)
+#else
+    #define TRACE(MSG)
+#endif
+
+int main(int argc, char *argv[]) {
+    TRACE(pre assembly);
+    __asm__(""
+            :
+            :
+            :
+            );
+    TRACE(post assembly);
+    return 0;
+}
+
+/* https://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html */
\ No newline at end of file
-- 
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