[gcc r14-3909] libgo: fix DejaGNU testsuite compiler when using build sysroot

[Ian Lance Taylor <ian@gcc.gnu.org>]

https://gcc.gnu.org/g:08dfde5a30ca818715e6d2bc2f2b592f8a98af77

commit r14-3909-g08dfde5a30ca818715e6d2bc2f2b592f8a98af77
Author: Ian Lance Taylor <iant@golang.org>
Date:   Tue Sep 12 09:11:48 2023 -0700

    libgo: fix DejaGNU testsuite compiler when using build sysroot
    
    Patch from Thomas Schwinge.
    
    PR testsuite/109951
    * configure.ac: 'AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)'.
    * Makefile.in: Regenerate.
    * configure: Likewise.
    * testsuite/Makefile.in: Likewise.
    * testsuite/lib/libgo.exp (libgo_init): If
    '--with-build-sysroot=[...]' was specified, use it for build-tree
    testing.
    * testsuite/libgo-test-support.exp.in (GOC_UNDER_TEST): Don't set.
    (SYSROOT_CFLAGS_FOR_TARGET): Set.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/527755

Diff:
---
 gcc/go/gofrontend/MERGE                   | 2 +-
 libgo/Makefile.in                         | 1 +
 libgo/configure                           | 7 +++++--
 libgo/configure.ac                        | 2 ++
 libgo/testsuite/Makefile.in               | 1 +
 libgo/testsuite/lib/libgo.exp             | 8 ++++++++
 libgo/testsuite/libgo-test-support.exp.in | 2 +-
 7 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 30710e856cba..d24054e0d930 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-53cdfab53ce79d8dfc1df01a696d4ffc43f17c3d
+967a215d6419c3db58f8f59a0c252c458abce395
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/Makefile.in b/libgo/Makefile.in
index 40340bfb7a5a..8dcb6d6a3548 100644
--- a/libgo/Makefile.in
+++ b/libgo/Makefile.in
@@ -474,6 +474,7 @@ SPLIT_STACK = @SPLIT_STACK@
 STRINGOPS_FLAG = @STRINGOPS_FLAG@
 STRIP = @STRIP@
 STRUCT_EPOLL_EVENT_FD_OFFSET = @STRUCT_EPOLL_EVENT_FD_OFFSET@
+SYSROOT_CFLAGS_FOR_TARGET = @SYSROOT_CFLAGS_FOR_TARGET@
 USE_DEJAGNU = @USE_DEJAGNU@
 VERSION = @VERSION@
 WARN_FLAGS = @WARN_FLAGS@
diff --git a/libgo/configure b/libgo/configure
index a607dbff68eb..2f1609b42b56 100755
--- a/libgo/configure
+++ b/libgo/configure
@@ -633,6 +633,7 @@ ac_subst_vars='am__EXEEXT_FALSE
 am__EXEEXT_TRUE
 LTLIBOBJS
 LIBOBJS
+SYSROOT_CFLAGS_FOR_TARGET
 HAVE_STATIC_LINK_FALSE
 HAVE_STATIC_LINK_TRUE
 HAVE_STAT_TIMESPEC_FALSE
@@ -11544,7 +11545,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11547 "configure"
+#line 11548 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11650,7 +11651,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11653 "configure"
+#line 11654 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -16147,6 +16148,8 @@ else
 fi
 
 
+
+
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/libgo/configure.ac b/libgo/configure.ac
index a59aa091d1dc..54c35c0903c6 100644
--- a/libgo/configure.ac
+++ b/libgo/configure.ac
@@ -913,6 +913,8 @@ AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
 LDFLAGS=$LDFLAGS_hold])
 AM_CONDITIONAL(HAVE_STATIC_LINK, test "$libgo_cv_ld_static" = yes)
 
+AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
+
 AC_CACHE_SAVE
 
 if test ${multilib} = yes; then
diff --git a/libgo/testsuite/Makefile.in b/libgo/testsuite/Makefile.in
index 7869265851cb..7c2e2e62fcf3 100644
--- a/libgo/testsuite/Makefile.in
+++ b/libgo/testsuite/Makefile.in
@@ -223,6 +223,7 @@ SPLIT_STACK = @SPLIT_STACK@
 STRINGOPS_FLAG = @STRINGOPS_FLAG@
 STRIP = @STRIP@
 STRUCT_EPOLL_EVENT_FD_OFFSET = @STRUCT_EPOLL_EVENT_FD_OFFSET@
+SYSROOT_CFLAGS_FOR_TARGET = @SYSROOT_CFLAGS_FOR_TARGET@
 USE_DEJAGNU = @USE_DEJAGNU@
 VERSION = @VERSION@
 WARN_FLAGS = @WARN_FLAGS@
diff --git a/libgo/testsuite/lib/libgo.exp b/libgo/testsuite/lib/libgo.exp
index b5833bbafe27..638bf8696025 100644
--- a/libgo/testsuite/lib/libgo.exp
+++ b/libgo/testsuite/lib/libgo.exp
@@ -53,5 +53,13 @@ load_gcc_lib timeout.exp
 load_gcc_lib go.exp
 
 proc libgo_init { args } {
+    global TESTING_IN_BUILD_TREE
+    if { [info exists TESTING_IN_BUILD_TREE] } {
+	# If '--with-build-sysroot=[...]' was specified, use it for build-tree
+	# testing.
+	global TEST_ALWAYS_FLAGS SYSROOT_CFLAGS_FOR_TARGET
+	set TEST_ALWAYS_FLAGS $SYSROOT_CFLAGS_FOR_TARGET
+    }
+
     go_init $args
 }
diff --git a/libgo/testsuite/libgo-test-support.exp.in b/libgo/testsuite/libgo-test-support.exp.in
index aaa6c5ef91d4..effd6f1caca5 100644
--- a/libgo/testsuite/libgo-test-support.exp.in
+++ b/libgo/testsuite/libgo-test-support.exp.in
@@ -14,4 +14,4 @@
 # along with GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.
 
-set GOC_UNDER_TEST {@GOC@}
+set SYSROOT_CFLAGS_FOR_TARGET {@SYSROOT_CFLAGS_FOR_TARGET@}