[1828] in Kerberos_V5_Development
Re: make vs. gmake and the Athena source tree
daemon@ATHENA.MIT.EDU (Greg Hudson)
Mon Sep 30 14:46:47 1996
To: Marc Horowitz <marc@MIT.EDU>
Cc: Greg Hudson <ghudson@MIT.EDU>, krbdev@MIT.EDU
In-Reply-To: Your message of "Mon, 30 Sep 1996 13:24:01 EDT."
<199609301724.NAA25771@beeblebrox.MIT.EDU>
Date: Mon, 30 Sep 1996 14:46:39 EDT
From: Greg Hudson <ghudson@MIT.EDU>
> If someone can propose a maintainable solution which uses none of
> these, I'll shut up. I just haven't seen one yet.
Okay, sure. As I mentioned in my initial message, I maintain that
suffix substitutions are okay for the purpose of rel-eng but a bad
strategic move for Kerberos, so you get a little bit of choice in the
Makefile (see the comments). As I mentioned before, the potential for
maintainer error in updating three identical lists of object files is
pretty low, so I don't think using suffix substitutions is much of a
win.
I borrowed a little bit from the tcl configure.in. This
implementation may not be immediately applicable to platforms with
especially bogus ways of generating shared libraries; you can either
choose not to support shared libraries on those systems, or write
scripts to generated shared libraries for those systems.
Obviously, you'll need to add a bit more hair to support the sources
being in multiple directories.
configure.in is:
AC_INIT(obj1.c)
AC_ARG_ENABLE(profiled, [help string], [profiled="$enableval"], [profiled=no])
AC_ARG_ENABLE(shared, [help string], [shared="$enableval"], [shared=no])
AC_PROG_CC
AC_CANONICAL_SYSTEM
dnl Determine parameters for making shared libraries.
PROF_CFLAGS="-pg"
SHLIB_CFLAGS=""
SHLIB_LD=":"
case "$target" in
*-*-linux*)
SHLIB_CFLAGS="-fPIC"
SHLIB_LD="${CC} -shared"
;;
*-*-irix*)
SHLIB_LD="ld -shared -rdata_shared"
;;
*-*-netbsd*)
SHLIB_CFLAGS="-fPIC"
SHLIB_LD="ld -Bshareable"
;;
*-*-solaris2*)
SHLIB_CFLAGS="-K PIC"
SHLIB_LD="/usr/ccs/bin/ld -G -z text"
;;
esac
AC_SUBST(PROF_CFLAGS)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
MAKELIBS='lib${LIB_NAME}.a'
if test "$profiled" != "no"; then
MAKELIBS="$MAKELIBS "'lib${LIB_NAME}_p.a'
fi
if test "$shared" != "no"; then
MAKELIBS="$MAKELIBS "'lib${LIB_NAME}.so.${SHLIB_VERSION}'
fi
AC_SUBST(MAKELIBS)
AC_OUTPUT(Makefile)
Makefile.in is:
# Boilerplate stuff.
CC=@CC@
CFLAGS=@CFLAGS@
PROF_CFLAGS=@PROF_CFLAGS@
SHLIB_CFLAGS=@SHLIB_CFLAGS@
SHLIB_LD=@SHLIB_LD@
MAKELIBS=@MAKELIBS@
.SUFFIXES: .so .po
# The actual Makefile.
LIB_NAME=test
SHLIB_VERSION=1.3
OBJS=obj1.o obj2.o obj3.o
SHOBJS=obj1.so obj2.so obj3.so
POBJS=obj1.po obj2.po obj3.po
# Or:
# SHOBS=${OBJS:.o=.so}
# POBJS=${OBJS:.o=.po}
all: ${MAKELIBS}
clean:
rm -f ${OBJS} ${SHOBJS} ${POBJS} ${MAKELIBS}
# More boilerplate stuff.
lib${LIB_NAME}.a: ${OBJS}
ar cru $@ ${OBJS}
lib${LIB_NAME}_p.a: ${POBJS}
ar cru $@ ${POBJS}
lib${LIB_NAME}.so.${SHLIB_VERSION}: ${SHOBJS}
${SHLIB_LD} -o $@ ${SHOBJS}
.c.po:
${CC} ${CFLAGS} ${PROF_CFLAGS} -c $< -o $@
.c.so:
${CC} ${CFLAGS} ${SHLIB_CFLAGS} -c $< -o $@
