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2024-01-10gdbsupport: tighten up libiberty code a bit with dnlMike Frysinger1-4/+3
No functional change here, just touch up generated output slightly. Approved-By: Tom Tromey <tom@tromey.com>
2024-01-10gdb: libiberty: switch to AC_CHECK_DECLS_ONCEMike Frysinger1-3/+4
Only check these decls once in case other m4 macros also look for them. Approved-By: Tom Tromey <tom@tromey.com>
2024-01-10gdb: move libiberty.m4 to gdbsupportMike Frysinger1-0/+31
This is used by gdb, gdbsupport, and gdbserver. We want to use it in the sim tree too. Move it to gdbsupport which is meant as the common sharing space for these projects. Approved-By: Tom Tromey <tom@tromey.com>