configure: For in-source builds, make a subdir and re-exec there.

2002-06-18  Phil Edwards  <pme@gcc.gnu.org>

	* configure:  For in-source builds, make a subdir and re-exec there.
	* Makefile:  New file.  Pass targets through to build directory.
	* .cvsignore:  No longer ignore "Makefile".

From-SVN: r54759

1 files changed, 32 insertions, 1 deletions

diff --git a/configure b/configure
index d64ea33..3e891d9 100755
--- a/configure
+++ b/configure
@@ -89,7 +89,7 @@ subdirs=
 target_alias=NOTARGET
 target_makefile_frag=
 undefs=NOUNDEFS
-version="$Revision: 1.42 $"
+version="$Revision: 1.43 $"
 x11=default
 bindir='${exec_prefix}/bin'
 sbindir='${exec_prefix}/sbin'
@@ -573,6 +573,37 @@ case "${srcdir}" in
 	fi
 esac
 
+# If it's an in-source build, make a directory and configure there instead.
+# Name the build directory after the host for clarity's sake.  Remember that
+# name for the redirecting makefile's use, since the makefile shouldn't have
+# to duplicate the work of figuring out host_alias.
+#
+# Also remember if this is a native build or not.  Variations on "or not"
+# are performed later in this script so we can't test them here.  In
+# particular, build_alias will still be empty unless specified by the user,
+# so do not try in-source builds when making a host-x-host compiler.
+# For a cross compile, "make all" = "all".  Otherwise, "all" = "bootstrap".
+if test "${srcdir}" = "." ; then
+	builddir=${host_alias}
+	if test ! -d ${builddir}; then
+		mkdir ${builddir} || exit 1
+	fi
+	if test ${host_alias} != ${target_alias}; then
+		t=all
+	else
+		t=bootstrap
+	fi
+	# stamp-builddir is too long for #$&!*@ 8.3 filesystems
+	echo "builddir=${builddir}" > s-buildd
+	echo "defaulttarget=$t" >> s-buildd
+	cd ${builddir}
+echo host $host_alias
+echo target $target_alias
+echo t $t
+sleep 20
+	exec ${config_shell} ../configure $arguments
+fi
+
 ### warn about some conflicting configurations.
 
 case "${srcdir}" in