[gdb/testsuite] Handle precise-aligned-alloc.c for remote host

With test-case gdb.arch/i386-sse.exp (and likewise gdb.arch/i386-avx.exp) and
host board local-remote-host-notty and target board native-gdbserver I run
into:
...
gdb compile failed, i386-sse.c:68:10: fatal error: \
  ../lib/precise-aligned-alloc.c: No such file or directory
 #include "../lib/precise-aligned-alloc.c"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...

Fix this using '#include "precise-aligned-alloc.c"' and making that work with
non-remote and remote host.

Tested on x86_64-linux.

1 files changed, 16 insertions, 0 deletions

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 8b1127c..0e69bca 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -9491,5 +9491,21 @@ gdb_caching_proc have_compile_flag { flag } {
 		additional_flags=$flag]
 }
 
+
+# Handle include file FILE, and if necessary update compiler flags variable
+# FLAGS.
+
+proc lappend_include_file { flags file } {
+    upvar $flags up_flags
+    if { [is_remote host] } {
+	gdb_remote_download host $file
+    } else {
+	set dir [file dirname $file]
+	if { $dir != [file join $::srcdir $::subdir] } {
+	    lappend up_flags "additional_flags=-I$dir"
+	}
+    }
+}
+
 # Always load compatibility stuff.
 load_lib future.exp