Relax tone when warning about cross-compiler names.

* lib/autoconf/programs.m4 (_AC_TOOL_WARN): Support cross-compiles
with poorly named tools; the issue has been reported too many
times in the last four years to pull support.
* doc/autoconf.texi (Specifying Names, Generic Programs): Update
documentation accordingly.
* THANKS: Update.
Reported by Josef Tran and others, wording suggested by Ralf
Wildenhues.

Signed-off-by: Eric Blake <ebb9@byu.net>

diff --git a/ChangeLog b/ChangeLog
index f78c40f66d1c1fb3737079a59730c387ad3cc9dc..1ad89f70befb526f7c89a3ab8dc07ed78d6cdd18 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2008-09-06  Eric Blake  <ebb9@byu.net>
+
+       Relax tone when warning about cross-compiler names.
+       * lib/autoconf/programs.m4 (_AC_TOOL_WARN): Support cross-compiles
+       with poorly named tools; the issue has been reported too many
+       times in the last four years to pull support.
+       * doc/autoconf.texi (Specifying Names, Generic Programs): Update
+       documentation accordingly.
+       * THANKS: Update.
+       Reported by Josef Tran and others, wording suggested by Ralf
+       Wildenhues.
+
 2008-09-01  Eric Blake  <ebb9@byu.net>
 
        Improve AC_C_BIGENDIAN.

diff --git a/THANKS b/THANKS
index 906ed171a8ac8c9b8f1f28ec5eeee61f6cb98a2f..afdd69782a1fbd93334a7c828fd6fab7e29c39a1 100644 (file)
--- a/THANKS
+++ b/THANKS
@@ -171,6 +171,7 @@ John Fortin                 fortinj@attglobal.net
 John Interrante             interran@uluru.stanford.edu
 John W. Eaton               jwe@bevo.che.wisc.edu
 Jonathan Kamens             jik@kamens.brookline.ma.us
+Josef Tran                  josef@timetrackertechnology.com
 Joseph S. Myers             jsm28@cam.ac.uk
 Jules Colding               colding@42tools.com
 Julian Onions               j.onions@nexor.co.uk

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 23417b3739911759db1c5936edd92a8f0e2d2c5f..97f09d7907379b736238d8f2ff609959338cfa2c 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -4034,8 +4034,8 @@ sets @code{RANLIB} to @file{i386-gnu-ranlib} if that program exists in
 @var{path}, or otherwise to @samp{ranlib} if that program exists in
 @var{path}, or to @samp{:} if neither program exists.
 
-In the future, when cross-compiling this macro will @emph{only}
-accept program names that are prefixed with the host type.
+When cross-compiling, this macro will issue a warning if no program
+prefixed with the host type could be found.
 For more information, see @ref{Specifying Names, , Specifying the
 system type}.
 @end defmac
@@ -4068,8 +4068,10 @@ the list are found, set @var{variable} to @var{value-if-not-found}; if
 @var{value-if-not-found} is not specified, the value of @var{variable}
 is not changed.  Calls @code{AC_SUBST} for @var{variable}.
 
-In the future, when cross-compiling this macro will @emph{not}
-accept program names that are not prefixed with the host type.
+When cross-compiling, this macro will issue a warning if no program
+prefixed with the host type could be found.
+For more information, see @ref{Specifying Names, , Specifying the
+system type}.
 @end defmac
 
 @anchor{AC_PATH_PROG}
@@ -4145,8 +4147,10 @@ name of the program if it is found.
 Like @code{AC_CHECK_TOOL}, but set @var{variable} to the absolute
 name of the program if it is found.
 
-In the future, when cross-compiling this macro will @emph{not}
-accept program names that are not prefixed with the host type.
+When cross-compiling, this macro will issue a warning if no program
+prefixed with the host type could be found.
+For more information, see @ref{Specifying Names, , Specifying the
+system type}.
 @end defmac
 
 
@@ -17731,17 +17735,15 @@ example, configuring as follows fails:
 ./configure CC=m68k-coff-gcc
 @end example
 
-In the future, when cross-compiling Autoconf will @emph{not}
-accept tools (compilers, linkers, assemblers) whose name is not
-prefixed with the host type.  The only case when this may be
-useful is when you really are not cross-compiling, but only
-building for a least-common-denominator architecture: an example
-is building for @code{i386-pc-linux-gnu} while running on an
-@code{i686-pc-linux-gnu} architecture.  In this case, some particular
-pairs might be similar enough to let you get away with the system
-compilers, but in general the compiler might make bogus assumptions
-on the host: if you know what you are doing, please create symbolic
-links from the host compiler to the build compiler.
+When cross-compiling, @command{configure} will warn about any tools
+(compilers, linkers, assemblers) whose name is not prefixed with the
+host type.  This is an aid to users performing cross-compilation.
+Continuing the example above, if a cross-compiler named @command{cc} is
+used with a native @command{pkg-config}, then libraries found by
+@command{pkg-config} will likely cause subtle build failures; but using
+the names @command{m68k-coff-cc} and @command{m68k-coff-pkg-config}
+avoids any confusion.  Avoiding the warning is as simple as creating the
+correct symlinks naming the cross tools.
 
 @cindex @command{config.sub}
 @command{configure} recognizes short aliases for many system types; for

diff --git a/lib/autoconf/programs.m4 b/lib/autoconf/programs.m4
index f2245fbc9e58a0d61206ae5688a3f41a9bb4c2e0..63f8a13f57044e9635d6628e0eefffd6d09568a5 100644 (file)
--- a/lib/autoconf/programs.m4
+++ b/lib/autoconf/programs.m4
@@ -211,9 +211,7 @@ AU_DEFUN([AC_CHECK_TOOL_PREFIX])
 AC_DEFUN([_AC_TOOL_WARN],
 [case $cross_compiling:$ac_tool_warned in
 yes:)
-AC_MSG_WARN([In the future, Autoconf will not detect cross-tools
-whose name does not start with the host triplet.  If you think this
-configuration is useful to you, please write to autoconf@gnu.org.])
+AC_MSG_WARN([using cross tools not prefixed with host triplet])
 ac_tool_warned=yes ;;
 esac])