# -*- makefile -*-
#
# ll.gmk: GNUMAKEFILE FRAGMENT FOR CLANG/LLVM
#
# $Id$
# Copyright (c) 2001-2014 Ravenbrook Limited.  See end of file for license.
#
# This file is included by platform makefiles that use the Clang/LLVM
# compiler.  It defines the compiler-specific variables that the
# common makefile fragment (<code/comm.gmk>) requires.

CC = clang
CFLAGSDEBUG = -O0 -g3
CFLAGSOPT = -O2 -g3
CFLAGSCOMPILER := \
	-Waggregate-return \
	-Wall \
	-Wcast-qual \
	-Wconversion \
	-Wduplicate-enum \
	-Werror \
	-Wextra \
	-Winline \
	-Wmissing-prototypes \
	-Wmissing-variable-declarations \
	-Wnested-externs \
	-Wno-extended-offsetof \
	-Wpointer-arith \
	-Wshadow \
	-Wstrict-aliasing=2 \
	-Wstrict-prototypes \
	-Wunreachable-code \
	-Wwrite-strings
CFLAGSCOMPILERSTRICT := -std=c89 -pedantic

# A different set of compiler flags for less strict compilation, for
# instance when we need to #include a third-party header file that
# won't fly with -ansi -pedantic.  Use sparingly!
CFLAGSCOMPILERLAX :=

# clang -MM generates a dependency line of the form:
#   thing.o : thing.c ...
# The sed line converts this into:
#   <pfm>/<variety>/thing.o <pfm>/<variety>/thing.d : thing.c ...
# If interrupted, this is liable to leave a zero-length file behind.

define gendep
	$(SHELL) -ec "$(CC) $(CFLAGSSTRICT) -MM $< | \
		sed '/:/s!$*.o!$(@D)/& $(@D)/$*.d!' > $@"
	[ -s $@ ] || rm -f $@
endef


# C. COPYRIGHT AND LICENSE
#
# Copyright (C) 2001-2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
# All rights reserved.  This is an open source license.  Contact
# Ravenbrook for commercial licensing options.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# 
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 
# 3. Redistributions in any form must be accompanied by information on how
# to obtain complete source code for this software and any accompanying
# software that uses this software.  The source code must either be
# included in the distribution or be available for no more than the cost
# of distribution plus a nominal fee, and must be freely redistributable
# under reasonable conditions.  For an executable file, complete source
# code means the source code for all modules it contains. It does not
# include source code for modules or files that typically accompany the
# major components of the operating system on which the executable file
# runs.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.