newlib-cygwin/newlib/testsuite/lib/flags.exp

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# Copyright (C) 2002, 2011 by Red Hat, Incorporated. All rights reserved.
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#
# Permission to use, copy, modify, and distribute this software
# is freely granted, provided that this notice is preserved.
#
if [info exists env(XGCC_FLAGS_FOR_TARGET)] {
verbose "GCC, newlib combined tree, build-tree testing; using standard search paths"
# ... instead of the search paths built here, based on 'objdir' as set in
# newlib's 'site.exp', which always points to the default multilib.
return
}
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# flags.exp: overrides the dejagnu versions of libgloss_link_flags,
# newlib_link_flags, and newlib_include_flags.
# These versions of the procedures generate link and include flags
# by searching for the needed files in the current build and source
# directories, rather than in the build and source paths of the
# compiler being used.
if {![llength [info procs saved_libgloss_link_flags]]} {
rename libgloss_link_flags saved_libgloss_link_flags
}
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proc libgloss_link_flags { args } {
global target_cpu
# These values come from the local site.exp.
global srcdir objdir
global multibuildtop
if {![info exists multibuildtop]} {
return [saved_libgloss_link_flags $args]
}
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verbose "In newlib version of libgloss_link_flags...\n"
if [isnative] {
return ""
}
if [is_remote host] {
return ""
}
Fix multilib libgloss selection. Regression testing newlib in conjunction with libgloss and --enable-multilib can result in incompatible multilib versions of newlib and libgloss being used during link. This manifests on ARM target when newlib regression is run using a GCC configured using --with-multilib-list=aprofile With this configuration many of the multilib variants built are mutually incompatible. The issue is that the newlib dejagnu foo iterates each multilib variant and correctly chooses the appropriate newlib variant but always chooses the root/base libgloss variant. The implementation of newlib/testsuite/lib/flags.exp contains the following fragment: set target_build_path "$objdir/$multibuildtop.." The effect of this fragment is to explicitly select the root version of libgloss, irrespective of the current multilib. Digging around in VC it appears that the original implementation of multlib magic came into the tree back in 2002 with: 6e9d950a (Thomas Fitzsimmons 2002-05-01 17:06:25 +0000 39) In this initial version of multilib support, newlib was multilib capable, but libgloss was not multilib capable, hence the necessity to explicitly select the root libgloss version. Subsequently flags.exp was modified to support out of tree testing: cec1d3b4 (Jeff Johnston 2005-07-05 00:11:50 +0000 25) This change is orthogonal to this issue, its effect is to exit early in none multilib configurations. Subsequently libgloss gained --enable-multilib support, the relevant change is: https://sourceware.org/ml/newlib/2006/msg00440.html commit 00a4b31ad08aef361c5d74125ece410b4c285975 Author: Jeff Johnston <jjohnstn@redhat.com> Date: Wed May 10 20:51:41 2006 +0000 This change enabled multilib support throughout libgloss, but ommitted to adjust the flag.exp behaviour which anchors the libgloss multilib selection to the base version. The attached patch adjusts flags.exp to select the current multilib variant of libgloss. 2015-11-06 Marcus Shawcroft <marcus.shawcroft@arm.com> * testsuite/lib/flags.exp (libgloss_link_flags): Drop multilibtop from target_build_path.
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set target_build_path "$objdir/.."
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set gloss_srcdir [lookfor_file ${srcdir} libgloss/$target_cpu]
if { $gloss_srcdir == "" } {
return ""
}
if [file exists $target_build_path/libgloss/$target_cpu] {
verbose "libgloss path is $target_build_path/libgloss/$target_cpu" 2
return "-B$target_build_path/libgloss/$target_cpu/ -L$target_build_path/libgloss/$target_cpu -L$gloss_srcdir"
} else {
verbose -log "No libgloss support for this target." 2
return ""
}
}
proc newlib_link_flags { args } {
global tool_root_dir
global srcdir objdir
verbose "In newlib version of newlib_link_flags...\n"
if [is_remote host] {
return ""
}
set ld_script_path [lookfor_file ${tool_root_dir} "ld/ldscripts"];
if { $ld_script_path != "" } {
set result "-L[file dirname $ld_script_path]"
} else {
set result ""
}
return "$result -B$objdir -L$objdir"
}
proc newlib_include_flags { args } {
global srcdir objdir
verbose "In newlib version of newlib_include_flags...\n"
if [is_remote host] {
return ""
}
set newlib_dir [lookfor_file ${srcdir} newlib/libc/include/assert.h]
if { ${newlib_dir} != "" } {
set newlib_dir [file dirname ${newlib_dir}]
}
return " -I$objdir/targ-include -I$objdir -I${newlib_dir}"
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}