There has been a long-standing problem with libtool on windows-ish platforms (cygwin, mingw, others?), in which libtool relinks exe's over and over and over, when the exe depends on a shared lib that is also built as part of the same package.
This behavior is due to the necessity that we must use a wrapper script to set the PATH properly, so that the newly compiled exe can "find" its shared lib, when run "in place" -- e.g. as part of a test-suite. Thus, we have
<build-dir>/foo (wrapper script)
<build-dir>/.libs/foo.exe (real exe)
However, the Makefile target is "foo$(EXEEXT)" -- which isn't satisfied by the "foo" wrapper script, so 'make' keeps trying to create it. However, the wrapper script can NOT be named "foo.exe", for a number of good reasons.
For more information on this problem, see
Cygwin List O' Issues (take 2): #3 relinking exe's
http://mail.gnu.org/pipermail/libtool/2002-November/007153.html
There is an attachment that demonstrates the problem; I've also attached it directly to this email.
EXEEXT and -link
http://mail.gnu.org/pipermail/libtool/2002-October/007131.html
Based on Earnie's suggestion in the second message, I have implemented a solution, but it is TIGHTLY linked between automake and libtool. This linkage is necessary because both libtool and automake 'use' the value of EXEEXT in a number of places; by saving its value and resetting it to null in libtool, we must re-supply the original value *in some places, but not others* so that automake works properly -- which means automake needs to "know" about the new variable that holds the original value of EXEEXT.
On non-windows platforms, EXEEXT is null. (pre-existing, unchanged)
On all platforms, LT_EXEEXT is null without the libtool changes.
Thus, on non-windows platforms, the automake changes have no effect, even if they are accepted (and used) without the corresponding libtool changes.
Similarly, on non-windows platforms, the libtool changes have no effect, even if they are accepted (and used) without the corresponding automake changes.
However, on windows-ish platforms, you must have BOTH changes or NEITHER -- or else things break. (Actually, it's not QUITE that bad. Even on windows, IF you have only the automake changes -- but don't use libtool at all, then things are fine. No probs. But you can't use an updated automake + non-updated libtool, and you can't use non-updated automake + updated libtool.)
So, for non-windows, each patch can be accepted and applied independently. For windows, they need to be synchronized -- but perhaps the autotool maintainers for cygwin (me) and mingw/MSYS (Earnie) can handle that *synchronization* "outside the tree" -- as long as it is clear that *eventually* both patches will make it in to their respective codebase.
-----------------------
For testing purposes, I've provided automake-devel-1.7.2-2 and libtool-devel-20030103-2 packages for cygwin. Just point setup.exe at
http://www.neuro.gatech.edu/users/cwilson/cygutils/testing/
and select the appropriate packages.
-----------------------
I've attached the changelogs and patches for both automake (against 1.7.2) and libtool (against current CVS). I've also attached a simple testcase. Just unpack, run ./bootstrap, ./configure, make.
Then 'make' again. Without these changes, program.exe will be relinked. With these changes it will not be. 'make install' and 'make uninstall' work as expected -- without relinking, with these changes.
I've run the testsuites of both automake and libtool with these changes, and have had no regressions -- but they ran a lot faster... <g>
-----------------------
Cygwin people: please test
Mingw/MSYS people: please apply to your own packages, and test
Libtool people: please apply?
I'd really like to make sure this or something like it
gets into 1.5...
Automake people: please apply?
I realize that, even if all of the cygwin and mingw people say "this is great", we will still require some coordination between the libtool and automake folks to insure both sets are eventually accepted and the timing of that acceptance.
--Chuck
cygwin libtool maintainer
cygwin automake co-maintainer
2003-01-05 Charles Wilson <[EMAIL PROTECTED]>
* lib/am/program.am: when %?LIBTOOL%, use $(LT_EXEEXT)
not %EXEEXT%
* lib/am/progs.am (install-%DIR%PROGRAMS): when %?LIBTOOL%,
use $(LT_EXEEXT) not $(EXEEXT). Insure that we test for
both foo and foo$[LT_]EXEEXT. Insure that we install
foo$([LT_]EXEEXT) and not foo.
(uninstall-%DIR%PROGRAMS): when %?LIBTOOL%, use
$(LT_EXEEXT) not $(EXEEXT)
(clean-%DIR%PROGRAMS): when %?LIBTOOL%, use $(LT_EXEEXT),
not $(EXEEXT). Insure that we remove both foo$(LT_EXEEXT)
and foo.2002-01-05 Charles Wilson <[EMAIL PROTECTED]>
* libtool.m4 (_LT_EXEEXT): new function
(AC_LIBTOOL_SETUP): call it
* tests/Makefile.am: pass $(LT_EXEEXT) on to
TEST_ENVIRONMENT
* tests/build-relink.test: use $(LT_EXEEXT)
instead of $(EXEEXT)
* tests/dryrun.test: ditto
* tests/noinst-link.test: ditto
diff -u automake-1.7.2-orig/lib/am/program.am automake-1.7.2/lib/am/program.am
--- automake-1.7.2-orig/lib/am/program.am 2002-12-06 04:53:18.000000000 -0500
+++ automake-1.7.2/lib/am/program.am 2003-01-05 18:09:01.000000000 -0500
@@ -15,6 +15,12 @@
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
+if %?LIBTOOL%
+%PROGRAM%%EXEEXT%: $(%XPROGRAM%_OBJECTS) $(%XPROGRAM%_DEPENDENCIES) %DIRSTAMP%
+## take care of wrapper script, static executable, and dynamic executable
+ @rm -f %PROGRAM% %PROGRAM%$(LT_EXEEXT) .libs/%PROGRAM%$(LT_EXEEXT)
+_libs/%PROGRAM%$(LT_EXEEXT)
+ $(%XLINK%) $(%XPROGRAM%_LDFLAGS) $(%XPROGRAM%_OBJECTS) $(%XPROGRAM%_LDADD)
+$(LIBS)
+else !%?LIBTOOL%
%PROGRAM%%EXEEXT%: $(%XPROGRAM%_OBJECTS) $(%XPROGRAM%_DEPENDENCIES) %DIRSTAMP%
## Remove program before linking. Otherwise the link will fail if the
## program is running somewhere. FIXME: this could be a loss if
@@ -23,3 +29,4 @@
## systems.
@rm -f %PROGRAM%%EXEEXT%
$(%XLINK%) $(%XPROGRAM%_LDFLAGS) $(%XPROGRAM%_OBJECTS) $(%XPROGRAM%_LDADD)
$(LIBS)
+endif !%?LIBTOOL%
diff -u automake-1.7.2-orig/lib/am/progs.am automake-1.7.2/lib/am/progs.am
--- automake-1.7.2-orig/lib/am/progs.am 2002-12-06 04:53:19.000000000 -0500
+++ automake-1.7.2/lib/am/progs.am 2003-01-05 18:43:30.000000000 -0500
@@ -36,8 +36,11 @@
@list='$(%DIR%_PROGRAMS)'; for p in $$list; do \
## On Cygwin with libtool test won't see `foo.exe' but instead `foo'.
## So we check for both.
- p1=`echo $$p|sed 's/$(EXEEXT)$$//'`; \
- if test -f $$p \
+?LIBTOOL? p1=`echo $$p|sed 's/$(LT_EXEEXT)$$//'`; \
+?LIBTOOL? p2=`echo $$p1|sed 's/$$/$(LT_EXEEXT)/'`; \
+?!LIBTOOL? p1=`echo $$p|sed 's/$(EXEEXT)$$//'`; \
+?!LIBTOOL? p2=`echo $$p1|sed 's/$$/$(EXEEXT)/'`; \
+ if test -f $$p2 \
?LIBTOOL? || test -f $$p1 \
; then \
## Compute basename of source file. Unless this is a nobase_ target, we
@@ -45,16 +48,17 @@
## not '$(DESTDIR)$(%NDIR%dir)/python/foo.yo'.
## However in all cases $(transform) applies only to the basename,
## so we have to strip the directory part.
- f=`echo "$$p1" | sed 's,^.*/,,;$(transform);s/$$/$(EXEEXT)/'`; \
+?LIBTOOL? f=`echo "$$p1" | sed 's,^.*/,,;$(transform);s/$$/$(LT_EXEEXT)/'`; \
+?!LIBTOOL? f=`echo "$$p1" | sed 's,^.*/,,;$(transform);s/$$/$(EXEEXT)/'`; \
## Prepend the directory part if nobase_ is used.
?!BASE? f=`echo "$$p1" | sed 's|[^/]*$$||'`"$$f"; \
## Note that we explicitly set the libtool mode. This avoids any
## lossage if the install program doesn't have a name that libtool
## expects.
-?LIBTOOL? echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) --mode=install
$(%DIR%PROGRAMS_INSTALL) $$p $(DESTDIR)$(%NDIR%dir)/$$f"; \
-?LIBTOOL? $(INSTALL_PROGRAM_ENV) $(LIBTOOL) --mode=install
$(%DIR%PROGRAMS_INSTALL) $$p $(DESTDIR)$(%NDIR%dir)/$$f || exit 1; \
-?!LIBTOOL? echo " $(INSTALL_PROGRAM_ENV) $(%DIR%PROGRAMS_INSTALL) $$p
$(DESTDIR)$(%NDIR%dir)/$$f"; \
-?!LIBTOOL? $(INSTALL_PROGRAM_ENV) $(%DIR%PROGRAMS_INSTALL) $$p
$(DESTDIR)$(%NDIR%dir)/$$f || exit 1; \
+?LIBTOOL? echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) --mode=install
+$(%DIR%PROGRAMS_INSTALL) $$p2 $(DESTDIR)$(%NDIR%dir)/$$f"; \
+?LIBTOOL? $(INSTALL_PROGRAM_ENV) $(LIBTOOL) --mode=install
+$(%DIR%PROGRAMS_INSTALL) $$p2 $(DESTDIR)$(%NDIR%dir)/$$f || exit 1; \
+?!LIBTOOL? echo " $(INSTALL_PROGRAM_ENV) $(%DIR%PROGRAMS_INSTALL) $$p2
+$(DESTDIR)$(%NDIR%dir)/$$f"; \
+?!LIBTOOL? $(INSTALL_PROGRAM_ENV) $(%DIR%PROGRAMS_INSTALL) $$p2
+$(DESTDIR)$(%NDIR%dir)/$$f || exit 1; \
else :; fi; \
done
endif %?INSTALL%
@@ -70,7 +74,8 @@
@$(NORMAL_UNINSTALL)
@list='$(%DIR%_PROGRAMS)'; for p in $$list; do \
## Remove any leading directory before applying $(transform).
- f=`echo "$$p" | sed
's,^.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/'`; \
+?LIBTOOL? f=`echo "$$p" | sed
+'s,^.*/,,;s/$(LT_EXEEXT)$$//;$(transform);s/$$/$(LT_EXEEXT)/'`; \
+?!LIBTOOL? f=`echo "$$p" | sed
+'s,^.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/'`; \
## Prepend the directory part if nobase_ is used.
?!BASE? f=`echo "$$p" | sed 's|[^/]*$$||'`"$$f"; \
echo " rm -f $(DESTDIR)$(%NDIR%dir)/$$f"; \
@@ -95,9 +100,10 @@
## FIXME: In the future (i.e., when it works) it would be nice to delegate
## this task to `libtool --mode=clean'.
?LIBTOOL? @list='$(%DIR%_PROGRAMS)'; for p in $$list; do \
-?LIBTOOL? f=`echo $$p|sed 's/$(EXEEXT)$$//'`; \
-?LIBTOOL? echo " rm -f $$p $$f"; \
-?LIBTOOL? rm -f $$p $$f ; \
+?LIBTOOL? f1=`echo $$p|sed 's/$(LT_EXEEXT)$$//'`; \
+?LIBTOOL? f2=`echo $$f1|sed 's/$$/$(LT_EXEEXT)/'`; \
+?LIBTOOL? echo " rm -f $$f1 $$f2"; \
+?LIBTOOL? rm -f $$f1 $$f2 ; \
?LIBTOOL? done
@@ -116,7 +122,8 @@
esac; \
## Strip the directory and $(EXEEXT) before applying $(transform).
f=`echo "$$p" | \
- sed 's,^.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/'`; \
+?LIBTOOL? sed
+'s,^.*/,,;s/$(LT_EXEEXT)$$//;$(transform);s/$$/$(LT_EXEEXT)/'`; \
+?!LIBTOOL? sed 's,^.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/'`; \
## Insert the directory back if nobase_ is used.
?!BASE? f=`echo "$$p" | sed 's|[^/]*$$||'`"$$f"; \
for opt in --help --version; do \
? .build
? .inst
? .sinst
? COPYING
? CYGWIN-PATCHES
? INSTALL
? install-sh
? missing
? mkinstalldirs
? libltdl/config-h.in
Index: libtool.m4
===================================================================
RCS file: /cvsroot/libtool/libtool/libtool.m4,v
retrieving revision 1.287
diff -u -u -r1.287 libtool.m4
--- libtool.m4 31 Dec 2002 05:43:23 -0000 1.287
+++ libtool.m4 6 Jan 2003 07:34:06 -0000
@@ -109,6 +109,7 @@
# Autoconf 2.13's AC_OBJEXT and AC_EXEEXT macros only works for C compilers!
AC_REQUIRE([AC_OBJEXT])dnl
AC_REQUIRE([AC_EXEEXT])dnl
+AC_REQUIRE([_LT_EXEEXT])dnl
dnl
AC_LIBTOOL_SYS_MAX_CMD_LEN
@@ -5510,6 +5511,17 @@
AC_DEFUN([LT_AC_PROG_RC],
[AC_CHECK_TOOL(RC, windres, no)
])
+
+AC_DEFUN([_LT_EXEEXT],
+[lt_exeext=$ac_exeext
+AC_SUBST([LT_EXEEXT], [$lt_exeext])dnl
+# Don't allow calls to AC_EXEEXT again
+define([AC_EXEEXT], [])
+# keep definition of $ac_exeext, but insure that EXEEXT
+# is empty in makefiles
+ac_cv_exeext=
+EXEEXT=
+])# _LT_EXEEXT
############################################################
# NOTE: This macro has been submitted for inclusion into #
Index: tests/Makefile.am
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/Makefile.am,v
retrieving revision 1.32
diff -u -u -r1.32 Makefile.am
--- tests/Makefile.am 18 Nov 2002 18:59:44 -0000 1.32
+++ tests/Makefile.am 6 Jan 2003 07:34:07 -0000
@@ -75,7 +75,8 @@
TESTS_ENVIRONMENT = MAKE="$(MAKE)" CC="$(CC)" CFLAGS="$(CFLAGS)" \
CPPFLAGS="$(CPPFLAGS)" LD="$(LD)" LDFLAGS="$(LDFLAGS)" \
LIBS="$(LIBS)" LN_S="$(LN_S)" NM="$(NM)" RANLIB="$(RANLIB)" \
- OBJEXT="$(OBJEXT)" EXEEXT="$(EXEEXT)" FFLAGS="$(FFLAGS)"
+ OBJEXT="$(OBJEXT)" EXEEXT="$(EXEEXT)" LT_EXEEXT="$(LT_EXEEXT)" \
+ FFLAGS="$(FFLAGS)"
EXTRA_DIST = defs $(COMMON_TESTS) $(CXX_TESTS) $(F77_TESTS)
Index: tests/build-relink.test
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/build-relink.test,v
retrieving revision 1.13
diff -u -u -r1.13 build-relink.test
--- tests/build-relink.test 19 Nov 2002 09:42:39 -0000 1.13
+++ tests/build-relink.test 6 Jan 2003 07:34:07 -0000
@@ -105,8 +105,8 @@
fi
if test "$shlibpath_overrides_runpath" != yes; then
- rm -f $objdir/lt-hell$EXEEXT || exit 1
- cp $objdir/hell$EXEEXT $objdir/lt-hell$EXEEXT || exit 1
+ rm -f $objdir/lt-hell$LT_EXEEXT || exit 1
+ cp $objdir/hell$LT_EXEEXT $objdir/lt-hell$LT_EXEEXT || exit 1
echo "running ../demo/hell with installed libhello.la"
if ./hell; then
echo "Worked, as expected"
@@ -114,7 +114,7 @@
echo "shlibpath_overrides_runpath should be set to yes"
status=1
fi
- rm -f $objdir/lt-hell$EXEEXT
+ rm -f $objdir/lt-hell$LT_EXEEXT
fi
exit $status
Index: tests/dryrun.test
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/dryrun.test,v
retrieving revision 1.9
diff -u -u -r1.9 dryrun.test
--- tests/dryrun.test 3 Mar 2002 03:19:55 -0000 1.9
+++ tests/dryrun.test 6 Jan 2003 07:34:08 -0000
@@ -89,7 +89,7 @@
echo "= Running $make uninstall in ../mdemo (dry run)"
# Libtool does not uninstall the programs, remove them first
-rm -f $prefix/bin/mdemo$EXEEXT $prefix/bin/mdemo_static$EXEEXT
+rm -f $prefix/bin/mdemo$LT_EXEEXT $prefix/bin/mdemo_static$LT_EXEEXT
ls -l . $objdir > $before
ls -lR $prefix >> $before
force_dry_run=yes $make uninstall 1>&2 || exit $?
Index: tests/noinst-link.test
===================================================================
RCS file: /cvsroot/libtool/libtool/tests/noinst-link.test,v
retrieving revision 1.3
diff -u -u -r1.3 noinst-link.test
--- tests/noinst-link.test 3 Mar 2002 03:19:55 -0000 1.3
+++ tests/noinst-link.test 6 Jan 2003 07:34:08 -0000
@@ -22,14 +22,14 @@
cd ../demo || exit 77
echo "removing libhello.la and hell from ../demo"
-rm -f libhello.la hell$EXEEXT
+rm -f libhello.la hell$LT_EXEEXT
echo "linking hell with a broken ../demo/libhello.la"
-if $make hell$EXEEXT libhello_la_OBJECTS=hello.lo; then
+if $make hell$LT_EXEEXT libhello_la_OBJECTS=hello.lo; then
echo "= Succeeded: this means the installed library was used, which is wrong"
status=1
fi
-rm -f libhello.la hell$EXEEXT
+rm -f libhello.la hell$LT_EXEEXT
exit $status
relinkprog-demo.tar.bz2
Description: Binary data
-- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
