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

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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@243533 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 2 insertions, 23 deletions

diff --git a/gcc/configure b/gcc/configure
index b9a39d3454e..2348f091abc 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -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