+##############################################################################
+# postlicyd: a postfix policy daemon with a lot of features #
+# ~~~~~~~~~ #
+# ________________________________________________________________________ #
+# #
+# 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. The names of its contributors may not be used to endorse or promote #
+# products derived from this software without specific prior written #
+# permission. #
+# #
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. #
+##############################################################################
+
+GCCVERSION:=$(shell $(CC) -dumpversion)
+GCCMACHINE:=$(shell $(CC) -dumpmachine)
+OBJSUFFIX:=-$(GCCMACHINE:-linux-gnu=)-$(GCCVERSION)
+
+ifneq (,$(filter 4.%,$(GCCVERSION)))
+ GCC4=1
+endif
+
+LDFLAGS += -Wl,--warn-common
+
+# Use pipes and not temp files.
+CFLAGS += -pipe
+# optimize even more
+CFLAGS += -O2
+# let the type char be unsigned by default
+CFLAGS += -funsigned-char
+CFLAGS += -fstrict-aliasing
+# turn on all common warnings
+CFLAGS += -Wall
+# turn on extra warnings
+CFLAGS += $(if $(GCC4),-Wextra,-W)
+# treat warnings as errors
+CFLAGS += -Werror
+CFLAGS += -Wchar-subscripts
+# warn about undefined preprocessor identifiers
+CFLAGS += -Wundef
+# warn about local variable shadowing another local variable
+CFLAGS += -Wshadow
+# warn about casting of pointers to increased alignment requirements
+CFLAGS += -Wcast-align
+# make string constants const
+CFLAGS += -Wwrite-strings
+# warn about implicit conversions with side effects
+# fgets, calloc and friends take an int, not size_t...
+#CFLAGS += -Wconversion
+# warn about comparisons between signed and unsigned values
+CFLAGS += -Wsign-compare
+# warn about unused declared stuff
+CFLAGS += -Wunused
+# don not warn about unused return value
+CFLAGS += -Wno-unused-value
+# warn about variable use before initialization
+CFLAGS += -Wuninitialized
+# warn about pointer arithmetic on void* and function pointers
+CFLAGS += -Wpointer-arith
+# warn about multiple declarations
+CFLAGS += -Wredundant-decls
+# warn if the format string is not a string literal
+CFLAGS += -Wformat-nonliteral
+# do not warn about strftime format with y2k issues
+CFLAGS += -Wno-format-y2k
+# barf if we change constness
+#CFLAGS += -Wcast-qual
+