initial commit

mk/cc.mk

@@ -0,0 +1,44 @@
+# Copyright (c) 2008-2015 The OpenRC Authors.
+# See the Authors file at the top-level directory of this distribution and
+# https://github.com/OpenRC/openrc/blob/master/AUTHORS
+#
+# This file is part of OpenRC. It is subject to the license terms in
+# the LICENSE file found in the top-level directory of this
+# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
+# This file may not be copied, modified, propagated, or distributed
+# except according to the terms contained in the LICENSE file.
+
+# Setup some good default CFLAGS
+CFLAGS?=	-O2 -g
+
+# Default to using the C99 standard
+CSTD?=		c99
+ifneq (${CSTD},)
+CFLAGS+=	-std=${CSTD}
+endif
+
+# Try and use some good cc flags if we're building from git
+# We don't use -pedantic as it will warn about our perfectly valid
+# use of %m in our logger.
+_CCFLAGS=	-Wall -Wextra -Wimplicit -Wshadow -Wformat=2 \
+		-Wmissing-prototypes -Wmissing-declarations \
+		-Wmissing-noreturn -Wmissing-format-attribute \
+		-Wnested-externs \
+		-Winline -Wwrite-strings -Wcast-align -Wcast-qual \
+		-Wpointer-arith \
+		-Wdeclaration-after-statement -Wsequence-point \
+		-Werror=implicit-function-declaration
+
+# We should be using -Wredundant-decls, but our library hidden proto stuff
+# gives loads of warnings. I don't fully understand it (the hidden proto,
+# not the warning) so we just silence the warning.
+
+_CC_FLAGS_SH=	for f in ${_CCFLAGS}; do \
+		if echo "int main(void) { return 0;} " | \
+		${CC} $$f -S -xc -o /dev/null - ; \
+		then printf "%s" "$$f "; fi \
+		done;
+_CC_FLAGS:=	$(shell ${_CC_FLAGS_SH})
+CFLAGS+=	${_CC_FLAGS}
+
+include ${MK}/debug.mk