openrc/src/cc.mk

# Copyright 2008 Roy Marples

# Setup some good default CFLAGS

CFLAGS ?= -O2 -pipe

# GNU Make way of detecting gcc flags we can use
check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
		  then echo "$(1)"; else echo "$(2)"; fi)

# pmake check for extra cflags 
WEXTRA != for x in -Wdeclaration-after-statement -Wsequence-point -Wextra; do \
	if $(CC) $$x -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
	then echo -n "$$x "; fi \
	done

# Loads of nice flags to ensure our code is good
CFLAGS += -pedantic -std=c99 \
		  -Wall -Wunused -Wimplicit -Wshadow -Wformat=2 \
		  -Wmissing-declarations -Wno-missing-prototypes -Wwrite-strings \
		  -Wbad-function-cast -Wnested-externs -Wcomment -Winline \
		  -Wchar-subscripts -Wcast-align -Wno-format-nonliteral \
		  $(call check_gcc, -Wdeclaration-after-statement) \
		  $(call check_gcc, -Wsequence-point) \
		  $(call check_gcc, -Wextra) $(WEXTRA)