GNU logs - #17747, boring messages

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Subject: bug#17747: Potential bug on Mac OS X 10.9 ignoring -rpath
Resent-From: Pekka Nikander <pekka.nikander@HIDDEN>
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Resent-Date: Tue, 10 Jun 2014 15:39:03 +0000
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To: 17747 <at> debbugs.gnu.org
From: Pekka Nikander <pekka.nikander@HIDDEN>
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Date: Tue, 10 Jun 2014 14:01:33 +0300
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I am trying to compile the TCE LLVM backend (http://tce.cs.tut.fi) under =
Mac OS X Maverics.  The hardest problem I've encountered so far is that =
in addition to the LLVM 3.4 installed as a part of Mac OS X, the TCE =
environment requires its own, slightly patched version of LLVM 3.4.  =
Both of these are needed, as the native Mac OS X LLVM is needed to =
compile the TCE source code in native MachO binaries, while the =
TCE-internal LLVM is needed to compile source code for the TCE targets, =
including newlib.

Now, since both of them are LLVM 3.4, they both have identically named =
shared libraries, with identical APIs.  Hence, the two versions need to =
be differentiated with an embedded rpath.  Using the DYLD_LIBRARY_PATH =
will not work, as independent of which of the two versions I place into =
the DYLD_LIBRARY_PATH, some of the binaries fail at the dynamic linking =
phase due to library incompatibilities.

Now, it appears that libtool 2.4.2 is ignoring the -rpath option for =
darwin, i.e. Mac OS X.  I have no information why.

I'm enclosing a minimal patch that seems to fix this problem, allowing =
-rpath to be used from the libtool command line and be preserved all the =
way down to calling the compiler.

Please note that I'm a complete newbie to libtool internals.  Hence, =
this patch may well break something else.

--Pekka Nikander
  http://www.pnr.iki.fi

diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 44e0ecf..6cee273 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -1084,6 +1084,7 @@ m4_defun([_LT_DARWIN_LINKER_FEATURES],
 [
   m4_require([_LT_REQUIRED_DARWIN_CHECKS])
   _LT_TAGVAR(archive_cmds_need_lc, $1)=3Dno
+  _LT_TAGVAR(hardcode_libdir_flag_spec, $1)=3D'${wl}-rpath =
${wl}$libdir'
   _LT_TAGVAR(hardcode_direct, $1)=3Dno
   _LT_TAGVAR(hardcode_automatic, $1)=3Dyes
   _LT_TAGVAR(hardcode_shlibpath_var, $1)=3Dunsupported
@@ -1102,14 +1103,14 @@ m4_defun([_LT_DARWIN_LINKER_FEATURES],
   esac
   if test "$_lt_dar_can_shared" =3D "yes"; then
     output_verbose_link_cmd=3Dfunc_echo_all
-    _LT_TAGVAR(archive_cmds, $1)=3D"\$CC -dynamiclib =
\$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags =
-install_name \$rpath/\$soname \$verstring =
$_lt_dar_single_mod${_lt_dsymutil}"
+    _LT_TAGVAR(archive_cmds, $1)=3D"\$CC -dynamiclib =
\$allow_undefined_flag -o \$lib \$libobjs \$deplibs \$compiler_flags =
-install_name \$soname \$verstring $_lt_dar_single_mod${_lt_dsymutil}"
     _LT_TAGVAR(module_cmds, $1)=3D"\$CC \$allow_undefined_flag -o \$lib =
-bundle \$libobjs \$deplibs \$compiler_flags${_lt_dsymutil}"
-    _LT_TAGVAR(archive_expsym_cmds, $1)=3D"sed 's,^,_,' < =
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC =
-dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs =
\$compiler_flags -instal
+    _LT_TAGVAR(archive_expsym_cmds, $1)=3D"sed 's,^,_,' < =
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC =
-dynamiclib \$allow_undefined_flag -o \$lib \$libobjs \$deplibs =
\$compiler_flags -instal
     _LT_TAGVAR(module_expsym_cmds, $1)=3D"sed -e 's,^,_,' < =
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC =
\$allow_undefined_flag -o \$lib -bundle \$libobjs \$deplibs =
\$compiler_flags${_lt_dar_
     m4_if([$1], [CXX],
 [   if test "$lt_cv_apple_cc_single_mod" !=3D "yes"; then
-      _LT_TAGVAR(archive_cmds, $1)=3D"\$CC -r -keep_private_externs =
-nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib =
\$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs =
\$compiler_flags -install_nam
-      _LT_TAGVAR(archive_expsym_cmds, $1)=3D"sed 's,^,_,' < =
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -r =
-keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC =
-dynamiclib \$al
+      _LT_TAGVAR(archive_cmds, $1)=3D"\$CC -r -keep_private_externs =
-nostdlib -o \${lib}-master.o \$libobjs~\$CC -dynamiclib =
\$allow_undefined_flag -o \$lib \${lib}-master.o \$deplibs =
\$compiler_flags -install_nam
+      _LT_TAGVAR(archive_expsym_cmds, $1)=3D"sed 's,^,_,' < =
\$export_symbols > \$output_objdir/\${libname}-symbols.expsym~\$CC -r =
-keep_private_externs -nostdlib -o \${lib}-master.o \$libobjs~\$CC =
-dynamiclib \$al
     fi
 ],[])
   else



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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Pekka Nikander <pekka.nikander@HIDDEN>
Subject: bug#17747: Acknowledgement (Potential bug on Mac OS X 10.9
 ignoring -rpath)
Message-ID: <handler.17747.B.140241473616419.ack <at> debbugs.gnu.org>
References: <A1E7B4BF-E377-44B9-84E9-4F7E15E4A1F5@HIDDEN>
X-Gnu-PR-Message: ack 17747
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Reply-To: 17747 <at> debbugs.gnu.org
Date: Tue, 10 Jun 2014 15:39:04 +0000

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