[gdb/testsuite] Don't use string cat in gdb.dwarf2/dw2-abs-hi-pc.exp

Test-case gdb.dwarf2/dw2-abs-hi-pc.exp uses string cat:
...
set sources [lmap i $sources { string cat "${srcdir}/${subdir}/" $i }]
...
but that's only supported starting tcl 8.6.

Fix this by using "expr" instead:
...
set sources [lmap i $sources { expr { "$srcdir/$subdir/$i" } }]
...

Tested on x86_64-linux.

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-abs-hi-pc.exp b/gdb/testsuite/gdb.dwarf2/dw2-abs-hi-pc.exp
index 0868b69f15e4dc2ca74119c304e47b7f9cc60302..2ea6a5cea0018f644647a9507915ed5a0d5b4046 100644 (file)
--- a/gdb/testsuite/gdb.dwarf2/dw2-abs-hi-pc.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-abs-hi-pc.exp
@@ -24,7 +24,8 @@ set sources \
         ${testfile}.c \
         ${testfile}-hello.c \
         ${testfile}-world.c]
-set sources [lmap i $sources { string cat "${srcdir}/${subdir}/" $i }]
+set sources [lmap i $sources { expr { "$srcdir/$subdir/$i" } }]
+
 lassign [function_range hello $sources] \
     hello_start hello_len
 lassign [function_range world $sources] \