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# 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)
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