Hi,

$ runtest 'CC_FOR_TARGET=gcc -m32' gdb.btrace/tailcall-only.exp
Running ./gdb.btrace/tailcall-only.exp ...
gdb compile failed, tailcall-only.c: Assembler messages:
tailcall-only.c:142: Error: cannot represent relocation type BFD_RELOC_64
[...]
tailcall-only.c:425: Error: cannot represent relocation type BFD_RELOC_64

It works for the other x86 arch combinations:

--- 20160406clean63-fedora-rawhide//fedora-rawhide-x86_64/out/gdb-x86_64-redhat-linux-gnu-m32.sum       2016-04-06 17:44:45.262849875 +0200
+++ 20160408clean67-fedora-rawhide//fedora-rawhide-x86_64/out/gdb-x86_64-redhat-linux-gnu-m32.sum       2016-04-08 17:40:49.739742759 +0200
#gdb.btrace/tailcall-only.exp
+Running gdb/testsuite/gdb.btrace/tailcall-only.exp ...
+gdb compile failed, tailcall-only.c: Assembler messages:
+tailcall-only.c:142: Error: cannot represent relocation type BFD_RELOC_64
[...]
+tailcall-only.c:425: Error: cannot represent relocation type BFD_RELOC_64
+UNTESTED: gdb.btrace/tailcall-only.exp: tailcall-only.exp
--- 20160406clean63-fedora-rawhide//fedora-rawhide-x86_64/out/gdb-x86_64-redhat-linux-gnu-m64.sum       2016-04-06 17:44:45.555852344 +0200
+++ 20160408clean67-fedora-rawhide//fedora-rawhide-x86_64/out/gdb-x86_64-redhat-linux-gnu-m64.sum       2016-04-08 17:40:50.021744759 +0200
#gdb.btrace/tailcall-only.exp
+Running gdb/testsuite/gdb.btrace/tailcall-only.exp ...
+PASS: gdb.btrace/tailcall-only.exp: set record function-call-history-size 0
[...]
+PASS: gdb.btrace/tailcall-only.exp: info frame
--- 20160406clean63-fedora-rawhide//fedora-rawhide-i386/out/gdb-i686-redhat-linux-gnu-m32.sum   2016-04-06 17:43:44.152334900 +0200
+++ 20160408clean67-fedora-rawhide//fedora-rawhide-i386/out/gdb-i686-redhat-linux-gnu-m32.sum   2016-04-08 17:40:04.451421514 +0200
#gdb.btrace/tailcall-only.exp
+Running gdb/testsuite/gdb.btrace/tailcall-only.exp ...
+PASS: gdb.btrace/tailcall-only.exp: set record function-call-history-size 0
[...]
+PASS: gdb.btrace/tailcall-only.exp: info frame

OK for check-in?


Jan