# -*- makefile -*-
#
# ll.gmk: GNUMAKEFILE FRAGMENT FOR CLANG/LLVM
#
# $Id$
# Copyright (c) 2001-2020 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 \
	-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) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
#
# 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.
#
# 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 AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR 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.