[gdb/testsuite] Fix gdb.base/enum_cond.exp on arm-linux

On arm-linux, I run into:
...
gdb compile failed, ld: warning: enum_cond.o uses variable-size enums yet \
  the output is to use 32-bit enums; use of enum values across objects may fail
UNTESTED: gdb.base/enum_cond.exp: failed to compile
...

Fix this by using -nostdlib.

Tested on arm-linux and x86_64-linux.

Approved-By: Simon Marchi <simon.marchi@efficios.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/gdb/testsuite/lib/gdb.exp b/gdb/testsuite/lib/gdb.exp
index 481f9ec..3349da7 100644
--- a/gdb/testsuite/lib/gdb.exp
+++ b/gdb/testsuite/lib/gdb.exp
@@ -11072,5 +11072,17 @@ proc section_get {exec section} {
     return $retval
 }
 
+# Return 1 if the compiler supports __builtin_trap, else return 0.
+
+gdb_caching_proc have_builtin_trap {} {
+
+    return [gdb_can_simple_compile builtin_trap {
+	int main() {
+	    __builtin_trap ();
+	    return 0;
+	}
+    } executable]
+}
+
 # Always load compatibility stuff.
 load_lib future.exp