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[Darwin, configury] No longer expect to find cross-target headers on the host.

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Earlier Darwin (esp. Darwin8 and Darwin9) had FAT libraries and suitable header
installations in /usr/include such that one could build a cross-toolchain 
(including cross-arch) using a common sysroot (including / for “current” version).

However this is no longer true on a number of levels.  A vanilla Darwin system has
no headers installed in /usr and it's certainly not appropriate to try and find
headers/libs for (say) x86-64-darwinNN X powerpc-darwin in /usr on any Darwin NN > 10 
(even Darwin10 is incomplete in that it omits the ppc64 multilib).  In the latter
example, the catch-all in the current configury to mean that 
"foo-darwin" == “foo-version-on-this-system” breaks the cross case 
—target=powerpc-apple-darwin —host=some-system-later-than-darwin10.

gcc/

2016-12-11  Iain Sandoe  <iain@codesourcery.com>

	* configure.ac (CROSS directory tests): Remove the assumption that
	Darwin hosts contain suitable target sysroots in "/".
	* configure: Regenerate.

From-SVN: r243533
This commit is contained in:
Iain Sandoe 2016-12-11 19:37:05 +00:00 committed by Iain Sandoe
parent 38dce2c34c
commit 74edc8a9b9
3 changed files with 8 additions and 44 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2016-12-11 Iain Sandoe <iain@codesourcery.com>
* configure.ac (CROSS directory tests): Remove the assumption that
Darwin hosts contain suitable target sysroots in "/".
* configure: Regenerate.
2016-12-11 Iain Sandoe <iain@codesourcery.com>
PR rtl-optimization/71496

25
gcc/configure vendored
View File

@ -12205,27 +12205,6 @@ then
CROSS="-DCROSS_DIRECTORY_STRUCTURE"
ALL=all.cross
SYSTEM_HEADER_DIR=$build_system_header_dir
case "$host","$target" in
# Darwin crosses can use the host system's libraries and headers,
# because of the fat library support. Of course, it must be the
# same version of Darwin on both sides. Allow the user to
# just say --target=foo-darwin without a version number to mean
# "the version on this system".
*-*-darwin*,*-*-darwin*)
hostos=`echo $host | sed 's/.*-darwin/darwin/'`
targetos=`echo $target | sed 's/.*-darwin/darwin/'`
if test $hostos = $targetos -o $targetos = darwin ; then
CROSS=
SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
with_headers=yes
fi
;;
i?86-*-*,x86_64-*-* \
| powerpc*-*-*,powerpc64*-*-*)
CROSS="$CROSS -DNATIVE_CROSS" ;;
esac
case $target in
*-*-mingw*)
if test "x$with_headers" = x; then
@ -18430,7 +18409,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 18433 "configure"
#line 18417 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -18536,7 +18515,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 18539 "configure"
#line 18523 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H

21
gcc/configure.ac
View File

@ -2010,27 +2010,6 @@ then
CROSS="-DCROSS_DIRECTORY_STRUCTURE"
ALL=all.cross
SYSTEM_HEADER_DIR=$build_system_header_dir
case "$host","$target" in
# Darwin crosses can use the host system's libraries and headers,
# because of the fat library support. Of course, it must be the
# same version of Darwin on both sides. Allow the user to
# just say --target=foo-darwin without a version number to mean
# "the version on this system".
*-*-darwin*,*-*-darwin*)
hostos=`echo $host | sed 's/.*-darwin/darwin/'`
targetos=`echo $target | sed 's/.*-darwin/darwin/'`
if test $hostos = $targetos -o $targetos = darwin ; then
CROSS=
SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
with_headers=yes
fi
;;
i?86-*-*,x86_64-*-* \
| powerpc*-*-*,powerpc64*-*-*)
CROSS="$CROSS -DNATIVE_CROSS" ;;
esac
case $target in
*-*-mingw*)
if test "x$with_headers" = x; then