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configure/makefile cleanup: remove LIBSELINUX, LIBWRAP and LIBPAM

To: openssh-unix-dev@mindrot.org
Subject: configure/makefile cleanup: remove LIBSELINUX, LIBWRAP and LIBPAM
From: Darren Tucker <dtucker@zip.com.au>
Date: Sat, 24 Mar 2007 22:39:04 +1100
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Hi all.

Now that we have SSHDLIBS for the libraries required by sshd only, it's
possible to remove some of the single-purpose variables from Makefile.

If this is worth doing, the next step would probably be to move the
OpenSSL libs into CRYPTOLIBS since binaries such as scp and sftp don't
need to be linked with libcrypto.

Index: Makefile.in
===================================================================
RCS file: /usr/local/src/security/openssh/cvs/openssh/Makefile.in,v
retrieving revision 1.283
diff -u -p -r1.283 Makefile.in
--- Makefile.in 23 Oct 2006 21:44:47 -0000      1.283
+++ Makefile.in 24 Mar 2007 10:49:45 -0000
@@ -44,11 +44,8 @@ LD=@LD@
 CFLAGS=@CFLAGS@
 CPPFLAGS=-I. -I$(srcdir) @CPPFLAGS@ $(PATHS) @DEFS@
 LIBS=@LIBS@
-LIBSELINUX=@LIBSELINUX@
 SSHDLIBS=@SSHDLIBS@
 LIBEDIT=@LIBEDIT@
-LIBPAM=@LIBPAM@
-LIBWRAP=@LIBWRAP@
 AR=@AR@
 AWK=@AWK@
 RANLIB=@RANLIB@
@@ -139,7 +136,7 @@ ssh$(EXEEXT): $(LIBCOMPAT) libssh.a $(SS
        $(LD) -o $@ $(SSHOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(LIBS)
 
 sshd$(EXEEXT): libssh.a        $(LIBCOMPAT) $(SSHDOBJS)
-       $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(LIBWRAP) 
$(LIBPAM) $(LIBSELINUX) $(SSHDLIBS) $(LIBS)
+       $(LD) -o $@ $(SSHDOBJS) $(LDFLAGS) -lssh -lopenbsd-compat $(SSHDLIBS) 
$(LIBS)
 
 scp$(EXEEXT): $(LIBCOMPAT) libssh.a scp.o progressmeter.o
        $(LD) -o $@ scp.o progressmeter.o bufaux.o $(LDFLAGS) -lssh 
-lopenbsd-compat $(LIBS)
Index: configure.ac
===================================================================
RCS file: /usr/local/src/security/openssh/cvs/openssh/configure.ac,v
retrieving revision 1.373
diff -u -p -r1.373 configure.ac
--- configure.ac        21 Mar 2007 10:39:57 -0000      1.373
+++ configure.ac        24 Mar 2007 11:31:56 -0000
@@ -1109,8 +1109,7 @@ AC_ARG_WITH(tcp-wrappers,
                                        CPPFLAGS="-I${withval} ${CPPFLAGS}"
                                fi
                        fi
-                       LIBWRAP="-lwrap"
-                       LIBS="$LIBWRAP $LIBS"
+                       LIBS="-lwrap $LIBS"
                        AC_MSG_CHECKING(for libwrap)
                        AC_TRY_LINK(
                                [
@@ -1126,7 +1125,7 @@ AC_ARG_WITH(tcp-wrappers,
                                        AC_DEFINE(LIBWRAP, 1,
                                                [Define if you want
                                                TCP Wrappers support])
-                                       AC_SUBST(LIBWRAP)
+                                       SSHDLIBS="$SSHDLIBS -lwrap"
                                        TCPW_MSG="yes"
                                ],
                                [
@@ -2028,7 +2027,7 @@ AC_ARG_WITH(pam,
 
                        PAM_MSG="yes"
 
-                       LIBPAM="-lpam"
+                       SSHDLIBS="$SSHDLIBS -lpam"
                        AC_DEFINE(USE_PAM, 1,
                                [Define if you want to enable PAM support])
 
@@ -2038,11 +2037,10 @@ AC_ARG_WITH(pam,
                                        # libdl already in LIBS
                                        ;;
                                *)
-                                       LIBPAM="$LIBPAM -ldl"
+                                       SSHDLIBS="$SSHDLIBS -ldl"
                                        ;;
                                esac
                        fi
-                       AC_SUBST(LIBPAM)
                fi
        ]
 )
@@ -3157,19 +3155,18 @@ LIBSELINUX=""
 AC_ARG_WITH(selinux,
        [  --with-selinux   Enable SELinux support],
        [ if test "x$withval" != "xno" ; then
+               save_LIBS="$LIBS"
                AC_DEFINE(WITH_SELINUX,1,[Define if you want SELinux support.])
                SELINUX_MSG="yes"
                AC_CHECK_HEADER([selinux/selinux.h], ,
                    AC_MSG_ERROR(SELinux support requires selinux.h header))
                AC_CHECK_LIB(selinux, setexeccon, [ LIBSELINUX="-lselinux" ],
                    AC_MSG_ERROR(SELinux support requires libselinux library))
-               save_LIBS="$LIBS"
-               LIBS="$LIBS $LIBSELINUX"
+               SSHDLIBS="$SSHDLIBS $LIBSELINUX"
                AC_CHECK_FUNCS(getseuserbyname get_default_context_with_level)
                LIBS="$save_LIBS"
        fi ]
 )
-AC_SUBST(LIBSELINUX)
 
 # Check whether user wants Kerberos 5 support
 KRB5_MSG="no"
@@ -4005,7 +4002,10 @@ echo "          Compiler: ${CC}"
 echo "    Compiler flags: ${CFLAGS}"
 echo "Preprocessor flags: ${CPPFLAGS}"
 echo "      Linker flags: ${LDFLAGS}"
-echo "         Libraries: ${LIBWRAP} ${LIBPAM} ${LIBS}"
+echo "         Libraries: ${LIBS}"
+if test ! -z "${SSHDLIBS}"; then
+echo "         +for sshd: ${SSHDLIBS}"
+fi
 
 echo ""
 

-- 
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
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