[SCM] GNU Libtool branch, master, updated. v2.2.6-59-gb7dbec6

[Ralf Wildenhues]

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- Log -----------------------------------------------------------------
commit b7dbec6b9d9adb07175cab46949c4b862338d9af
Author: Ralf Wildenhues <address@hidden>
Date:   Wed Dec 17 20:41:57 2008 +0100

    Add cache variables to link tests.
    
    * libltdl/m4/libtool.m4 (_LT_SYS_DYNAMIC_LINKER)
    (_LT_LINKER_SHLIBS): Add cache variables to tests that
    require the linker to work.  For shlibpath_overrides_runpath,
    this also changes the semantics to let the result from the C
    compiler take precedence.
    * tests/no-executables.at (AC_NO_EXECUTABLES): New file.
    * Makefile.am: Update.
    * NEWS: Update.
    Report of shlibpath_overrides_runpath issue by Mike Frysinger,
    report of GCC issue by Andreas Schwab.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog               |   14 ++++++++
 Makefile.am             |    1 +
 NEWS                    |    2 +
 libltdl/m4/libtool.m4   |   85 +++++++++++++++++++++++++---------------------
 tests/no-executables.at |   78 +++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 141 insertions(+), 39 deletions(-)
 create mode 100644 tests/no-executables.at

diff --git a/ChangeLog b/ChangeLog
index 5b8d76f..ce3b324 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2008-12-17  Ralf Wildenhues  <address@hidden>
+
+       Add cache variables to link tests.
+       * libltdl/m4/libtool.m4 (_LT_SYS_DYNAMIC_LINKER)
+       (_LT_LINKER_SHLIBS): Add cache variables to tests that
+       require the linker to work.  For shlibpath_overrides_runpath,
+       this also changes the semantics to let the result from the C
+       compiler take precedence.
+       * tests/no-executables.at (AC_NO_EXECUTABLES): New file.
+       * Makefile.am: Update.
+       * NEWS: Update.
+       Report of shlibpath_overrides_runpath issue by Mike Frysinger,
+       report of GCC issue by Andreas Schwab.
+
 2008-11-28  Paolo Bonzini  <address@hidden>
 
        Fix inadvertent commit.
diff --git a/Makefile.am b/Makefile.am
index 98feed4..86224e1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -483,6 +483,7 @@ TESTSUITE_AT        = tests/testsuite.at \
                  tests/template.at \
                  tests/ctor.at \
                  tests/early-libtool.at \
+                 tests/no-executables.at \
                  tests/deplibs-ident.at \
                  tests/configure-iface.at \
                  tests/stresstest.at \
diff --git a/NEWS b/NEWS
index 8927d23..9550e5b 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,8 @@ New in 2.2.8 2008-??-??: git version 2.2.7a, Libtool team:
   - libtool command line flag --verbose now also enables explicit
     verbose output, in addition to its previous behavior of (re)enabling
     only the default informational output. See New Features, --no-silent.
+  - Link tests are guarded by cache variables so they can be avoided for
+    bootstrapping purposes (e.g., when link tests are not possible).
 
 * Miscellaneous changes:
 
diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 3fa0688..b7b566d 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -2389,16 +2389,21 @@ linux* | k*bsd*-gnu)
   finish_cmds='PATH="\$PATH:/sbin" ldconfig -n $libdir'
   shlibpath_var=LD_LIBRARY_PATH
   shlibpath_overrides_runpath=no
+
   # Some binutils ld are patched to set DT_RUNPATH
-  save_LDFLAGS=$LDFLAGS
-  save_libdir=$libdir
-  eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \
-       LDFLAGS=\"\$LDFLAGS $_LT_TAGVAR(hardcode_libdir_flag_spec, $1)\""
-  AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
-    [AS_IF([ ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep 
"RUNPATH.*$libdir" >/dev/null],
-       [shlibpath_overrides_runpath=yes])])
-  LDFLAGS=$save_LDFLAGS
-  libdir=$save_libdir
+  AC_CACHE_VAL([lt_cv_shlibpath_overrides_runpath],
+    [lt_cv_shlibpath_overrides_runpath=no
+    save_LDFLAGS=$LDFLAGS
+    save_libdir=$libdir
+    eval "libdir=/foo; wl=\"$_LT_TAGVAR(lt_prog_compiler_wl, $1)\"; \
+        LDFLAGS=\"\$LDFLAGS $_LT_TAGVAR(hardcode_libdir_flag_spec, $1)\""
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([],[])],
+      [AS_IF([ ($OBJDUMP -p conftest$ac_exeext) 2>/dev/null | grep 
"RUNPATH.*$libdir" >/dev/null],
+        [lt_cv_shlibpath_overrides_runpath=yes])])
+    LDFLAGS=$save_LDFLAGS
+    libdir=$save_libdir
+    ])
+  shlibpath_overrides_runpath=$lt_cv_shlibpath_overrides_runpath
 
   # This implies no fast_install, which is unacceptable.
   # Some rework will be needed to allow for fast_install
@@ -5055,36 +5060,38 @@ x|xyes)
       # Test whether the compiler implicitly links with -lc since on some
       # systems, -lgcc has to come before -lc. If gcc already passes -lc
       # to ld, don't add -lc before -lgcc.
-      AC_MSG_CHECKING([whether -lc should be explicitly linked in])
-      $RM conftest*
-      echo "$lt_simple_compile_test_code" > conftest.$ac_ext
-
-      if AC_TRY_EVAL(ac_compile) 2>conftest.err; then
-        soname=conftest
-        lib=conftest
-        libobjs=conftest.$ac_objext
-        deplibs=
-        wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1)
-       pic_flag=$_LT_TAGVAR(lt_prog_compiler_pic, $1)
-        compiler_flags=-v
-        linker_flags=-v
-        verstring=
-        output_objdir=.
-        libname=conftest
-        lt_save_allow_undefined_flag=$_LT_TAGVAR(allow_undefined_flag, $1)
-        _LT_TAGVAR(allow_undefined_flag, $1)=
-        if AC_TRY_EVAL(_LT_TAGVAR(archive_cmds, $1) 2\>\&1 \| $GREP \" -lc \" 
\>/dev/null 2\>\&1)
-        then
-         _LT_TAGVAR(archive_cmds_need_lc, $1)=no
-        else
-         _LT_TAGVAR(archive_cmds_need_lc, $1)=yes
-        fi
-        _LT_TAGVAR(allow_undefined_flag, $1)=$lt_save_allow_undefined_flag
-      else
-        cat conftest.err 1>&5
-      fi
-      $RM conftest*
-      AC_MSG_RESULT([$_LT_TAGVAR(archive_cmds_need_lc, $1)])
+      AC_CACHE_CHECK([whether -lc should be explicitly linked in],
+       [lt_cv_]_LT_TAGVAR(archive_cmds_need_lc, $1),
+       [$RM conftest*
+       echo "$lt_simple_compile_test_code" > conftest.$ac_ext
+
+       if AC_TRY_EVAL(ac_compile) 2>conftest.err; then
+         soname=conftest
+         lib=conftest
+         libobjs=conftest.$ac_objext
+         deplibs=
+         wl=$_LT_TAGVAR(lt_prog_compiler_wl, $1)
+         pic_flag=$_LT_TAGVAR(lt_prog_compiler_pic, $1)
+         compiler_flags=-v
+         linker_flags=-v
+         verstring=
+         output_objdir=.
+         libname=conftest
+         lt_save_allow_undefined_flag=$_LT_TAGVAR(allow_undefined_flag, $1)
+         _LT_TAGVAR(allow_undefined_flag, $1)=
+         if AC_TRY_EVAL(_LT_TAGVAR(archive_cmds, $1) 2\>\&1 \| $GREP \" -lc \" 
\>/dev/null 2\>\&1)
+         then
+           lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=no
+         else
+           lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)=yes
+         fi
+         _LT_TAGVAR(allow_undefined_flag, $1)=$lt_save_allow_undefined_flag
+       else
+         cat conftest.err 1>&5
+       fi
+       $RM conftest*
+       ])
+      _LT_TAGVAR(archive_cmds_need_lc, 
$1)=$lt_cv_[]_LT_TAGVAR(archive_cmds_need_lc, $1)
       ;;
     esac
   fi
diff --git a/tests/no-executables.at b/tests/no-executables.at
new file mode 100644
index 0000000..e9e229a
--- /dev/null
+++ b/tests/no-executables.at
@@ -0,0 +1,78 @@
+# no-executables.at -- Libtool usage in GCC        -*- Autotest -*-
+
+#   Copyright (C) 2008 Free Software Foundation, Inc.
+#   Written by Ralf Wildenhues, 2008
+#
+#   This file is part of GNU Libtool.
+#
+# GNU Libtool is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# GNU Libtool is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Libtool; see the file COPYING.  If not, a copy
+# can be downloaded from  http://www.gnu.org/licenses/gpl.html,
+# or obtained by writing to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+####
+
+AT_BANNER([Libtool usage in GCC])
+AT_SETUP([AC_NO_EXECUTABLES])
+
+mkdir m4
+
+AT_DATA([configure.ac],
+[[AC_INIT([no-exec], [1])
+AC_CONFIG_MACRO_DIR([m4])
+
+# We punt a bit here, to get the results of AC_PROG_CC
+# (and allow it to do link tests) but still error out on
+# link tests within Libtool macros.
+LDFLAGS=-lnosuchlibrary
+AC_NO_EXECUTABLES
+AC_PROG_CC
+AC_PROG_CXX
+AC_PROG_F77
+AC_PROG_FC
+AM_PROG_GCJ
+
+# Consequently, we have to set cache variables for each link
+# test we may need.  For the purposes of this test, it shouldn't
+# matter much whether these values are actually wrong, the point
+# is that the linker should never be invoked.
+
+lt_cv_shlibpath_overrides_runpath=no
+lt_cv_archive_cmds_need_lc=no
+lt_cv_cc_needs_belf=no
+lt_cv_ld_exported_symbols_list=no
+lt_cv_prog_compiler_static_works=no
+
+# Deal with AC_LIBTOOL_DLOPEN in one of two possible ways:
+# - do not execute it at all in the ac_no_link case
+# - preset the individual Autoconf test variables
+
+if ${test_ac_libtool_dlopen-false}; then
+    ac_cv_func_shl_load=no
+    ac_cv_lib_dld_shl_load=no
+    ac_cv_func_dlopen=no
+    ac_cv_lib_dl_dlopen=no
+    ac_cv_lib_svld_dlopen=no
+    ac_cv_lib_dld_dld_link=no
+  AC_LIBTOOL_DLOPEN
+fi
+AC_PROG_LIBTOOL
+
+AC_OUTPUT
+]])
+
+LT_AT_BOOTSTRAP([--install], [-I m4], [ignore], [ignore], [], [ignore], 
[ignore])
+LT_AT_CONFIGURE([])
+LT_AT_CONFIGURE([test_ac_libtool_dlopen=:])
+
+AT_CLEANUP


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