Fix build on MIPS and powerpc.

[jhb]

Summary

• Commit 0335ac6d12 fixes a build breakage on big-endian 64-bit platforms including MIPS and powerpc.
• Restore a cast in the powerpc kgdb code incorrectly removed in r446852.

[jhb]

Andreas also has another change to force the use of GCC 6 since GCC 5 apparently isn't sufficient. I'm happy to add that in once I get more details back from Andreas (so this isn't commit-ready yet). Andreas is also still testing 32-bit powerpc (so far he has only built 64-bit powerpc).

[andreast]

Tested on both, 32-bit and 64-bit powerpc. With the below addition to the Makefile.

The error I had was this one:

./common/common-utils.h:101:12: error: 'std::to_string' has not been
declared

using std::to_string;

The snippet I added to the Makefile:

• devel/gdb/Makefile (revision 449048)

+++ devel/gdb/Makefile (working copy)
@@ -93,6 +93,10 @@
CONFIGURE_TARGET= x86_64-portbld-freebsd${OSREL}
.endif

+.if ${COMPILER_TYPE} == gcc && ${COMPILER_VERSION} < 60
+CFLAGS+= -D_GLIBCXX_USE_C99
+.endif
+
.if ${COMPILER_TYPE} == "clang"
CFLAGS+= -Wno-extended-offsetof
.endif

[jhb]

Gerald Pfeifer has recently changed the default for USE_GCC to GCC 6 and will soon fix Uses/compiler.mk to use GCC 6 (instead of 5) for the C++14 case. At that point I think this patch can be committed as is.

[pizzamig]

I'll commit this patch as soon as possible