[PATCH v1 1/1] configure: correct tooldir install path

This patch is required to fix how the newlib headers are installed
when using a sysroot install directory.

The cross compiler expects headers to be in
.../host/usr/arm-none-eabi/sysroot/usr/include/newlib.h
by default newlib installed the headers into
.../host/usr/arm-none-eabi/sysroot/usr/arm-none-eabi/include/newlib.h

${exec_prefix} provides the .../host/usr/arm-none-eabi/sysroot path
${target_noncanonical} provides an extra arm-none-eabi/ that must be removed.

Signed-off-by: Neal Frager <[email protected]>
Co-developed-by: Chris Wardman <[email protected]>
---
 configure | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure b/configure
index eb0ba840b..29ab40cf6 100755
--- a/configure
+++ b/configure
@@ -821,6 +821,7 @@ enable_linker_plugin_flags
 enable_stage1_languages
 enable_objc_gc
 with_build_sysroot
+with_install_sysroot
 with_debug_prefix_map
 with_build_config
 enable_vtable_verify
@@ -1590,6 +1591,7 @@ Optional Packages:
   --with-isl-lib=PATH     Specify the directory for the installed isl library
   --with-build-sysroot=SYSROOT
                           use sysroot as the system root during the build
+  --with-install-sysroot  use sysroot install directory
   --with-debug-prefix-map='A=B C=D ...'
                           map A to B, C to D ... in debug information
   --with-build-config='NAME NAME2...'
@@ -7057,7 +7059,12 @@ esac
 
 # Some systems (e.g., one of the i386-aix systems the gas testers are
 # using) don't handle "\$" correctly, so don't use it here.
+# Check whether --with-install-sysroot was given.
+if test "${with_install_sysroot+set}" = set; then :
+tooldir='${exec_prefix}'
+else
 tooldir='${exec_prefix}'/${target_noncanonical}
+fi
 build_tooldir=${tooldir}
 
 # Create a .gdbinit file which runs the one in srcdir
-- 
2.25.1