Re: [Xen-ia64-devel] Re: [Xen-devel] [PATCH 2 of 2] cross-build fixes in ioemu-remote

[Aron Griffis <aron@xxxxxx>]

Ian Jackson wrote:  [Fri Aug 01 2008, 12:26:54PM EDT]
> Aron Griffis writes ("Re: [Xen-ia64-devel] Re: [Xen-devel] [PATCH 2 of 2] 
> cross-build fixes in ioemu-remote"):
> > -                    --interp-prefix=$(CROSS_SYS_ROOT)
> > +                    --interp-prefix=$(CROSS_SYS_ROOT) \
> > +                    --install='env PATH="$(CROSS_BIN_PATH):$$$$PATH" 
> > install'
> 
> This is a bit bizarre (not to mention the fact that the number
> of $'s will depend on undocumented properties of the way qemu's
> configure inteprets that option).

qemu's configure uses quoting properly and applies no
interpretation on the way through.  The dollars are doubled once
for the Makefile where this is set, once for the inner Makefile
where it is used.

However... there is a Solaris hack in configure that will break
with any --install option other than a bare word.  And I agree
with you anyway, it's a fragile approach.

> Why not just set PATH directly and export it ?

qemu expects "gcc" and the like to refer to the host toolchain.
I think we only want the PATH set for install.  Ideally there
would be an /usr/bin/ia64-linux-gnu-install to accompany the
others and use the right strip, but oh well.

> But in general I think this is a reasonable approach.

How about...

# HG changeset patch
# User Aron Griffis <aron@xxxxxx>
# Date 1217610812 14400
# Node ID 714215c06a98ea845e3f25371945d62abb1c18c7
# Parent  f69a23b209c4ab04827051734e37f095607400ed
add cross-install to find the right "strip"

Signed-off-by: Aron Griffis <aron@xxxxxx>

diff --git a/tools/Makefile b/tools/Makefile
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -38,8 +38,10 @@
 
 # For the sake of linking, set the sys-root
 ifneq ($(CROSS_COMPILE),)
+CROSS_BIN_PATH ?= /usr/$(CROSS_COMPILE:-=)/bin
 CROSS_SYS_ROOT ?= /usr/$(CROSS_COMPILE:-=)/sys-root
-export CROSS_SYS_ROOT
+export CROSS_SYS_ROOT # exported for check/funcs.sh
+export CROSS_BIN_PATH # exported for cross-install.sh
 endif
 
 .PHONY: all
@@ -57,7 +59,8 @@
 ifneq ($(XEN_COMPILE_ARCH),$(XEN_TARGET_ARCH))
 IOEMU_CONFIGURE_CROSS ?= --cpu=$(XEN_TARGET_ARCH) \
                         --cross-prefix=$(CROSS_COMPILE) \
-                        --interp-prefix=$(CROSS_SYS_ROOT)
+                        --interp-prefix=$(CROSS_SYS_ROOT) \
+                        --install=$(CURDIR)/cross-install
 endif
 
 ioemu/config-host.mak:
diff --git a/tools/cross-install b/tools/cross-install
new file mode 100755
--- /dev/null
+++ b/tools/cross-install
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# prepend CROSS_BIN_PATH to find the right "strip"
+if [ -n "$CROSS_BIN_PATH" ]; then
+    PATH="$CROSS_BIN_PATH:$PATH"
+fi
+
+exec install "$@"

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