Ports: Add initial GDB 11.1 port

This builds and runs, but crashes when you attempt to try to debug
something at the moment.

Ports/AvailablePorts.md

@@ -47,6 +47,7 @@ Please make sure to keep this list up to date when adding and updating ports. :^
 | [`freetype`](freetype/)                | FreeType                                                        | 2.10.4                   | https://www.freetype.org/                                                      |
 | [`frotz`](frotz/)                      | Frotz                                                           | 2.53                     | https://gitlab.com/DavidGriffith/frotz                                         |
 | [`gawk`](gawk/)                        | GNU awk                                                         | 5.1.0                    | https://www.gnu.org/software/gawk/                                             |
+| [`gdb`](gdb/)                          | GNU Project Debugger                                            | 11.1                     | https://sourceware.org/gdb                                                     |
 | [`gcc`](gcc/)                          | GNU Compiler Collection                                         | 11.2.0                   | https://gcc.gnu.org/                                                           |
 | [`genemu`](genemu/)                    | Genesis / MegaDrive Emulator                                    | 3bf6f7c                  | https://github.com/rasky/genemu                                                |
 | [`gettext`](gettext/)                  | GNU gettext                                                     | 0.21                     | https://www.gnu.org/software/gettext/                                          |

Ports/gdb/package.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=gdb
+version=11.1
+useconfigure=true
+configopts=("--target=${SERENITY_ARCH}-pc-serenity" "--with-sysroot=/" "--with-build-sysroot=${SERENITY_INSTALL_ROOT}" "--with-newlib" "--enable-languages=c,c++" "--disable-lto" "--disable-nls" "--enable-shared" "--enable-default-pie" "--enable-host-shared" "--enable-threads=posix")
+files="https://ftpmirror.gnu.org/gnu/gdb/gdb-${version}.tar.xz gdb-${version}.tar.xz cccfcc407b20d343fb320d4a9a2110776dd3165118ffd41f4b1b162340333f94"
+makeopts+=("all")
+installopts=("DESTDIR=${SERENITY_INSTALL_ROOT}")
+depends=("gmp" "binutils")
+auth_type="sha256"
+
+# We only have a stub of getrusage(..)
+export ac_cv_func_getrusage=no
+
+# We don't support the madvise options that are used.
+export ac_cv_func_madvise=no

Ports/gdb/patches/build-config.patch

@@ -0,0 +1,55 @@
+diff --git a/bfd/config.bfd b/bfd/config.bfd
+index 30087e3..11dc114 100644
+--- a/bfd/config.bfd
++++ b/bfd/config.bfd
+@@ -634,6 +634,11 @@ case "${targ}" in
+     targ_selvecs=
+     targ64_selvecs=x86_64_elf64_vec
+     ;;
++  i[3-7]86-*-serenity*)
++    targ_defvec=i386_elf32_vec
++    targ_selvecs=
++    targ64_selvecs=x86_64_elf64_vec
++    ;;
+ #ifdef BFD64
+   x86_64-*-cloudabi*)
+     targ_defvec=x86_64_elf64_cloudabi_vec
+@@ -694,6 +699,10 @@ case "${targ}" in
+     targ_selvecs=i386_elf32_vec
+     want64=true
+     ;;
++  x86_64-*-serenity*)
++    targ_defvec=x86_64_elf64_vec
++    want64=true
++    ;;
+ #endif
+   i[3-7]86-*-lynxos*)
+     targ_defvec=i386_elf32_vec
+diff --git a/gdbsupport/configure b/gdbsupport/configure
+index a9dd02c..3c5bcf5 100755
+--- a/gdbsupport/configure
++++ b/gdbsupport/configure
+@@ -8934,7 +8934,7 @@ $as_echo "$gdb_cv_cxx_std_thread" >&6; }
+ 
+     # This check must be here, while LIBS includes any necessary
+     # threading library.
+-    for ac_func in pthread_sigmask pthread_setname_np
++    for ac_func in pthread_setname_np
+ do :
+   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ ac_fn_cxx_check_func "$LINENO" "$ac_func" "$as_ac_var"
+diff --git a/libiberty/configure b/libiberty/configure
+index fffb91d..defc239 100755
+--- a/libiberty/configure
++++ b/libiberty/configure
+@@ -6478,7 +6478,9 @@ case "${host}" in
+     $as_echo "#define HAVE_SYS_ERRLIST 1" >>confdefs.h
+ 
+     $as_echo "#define HAVE_SYS_NERR 1" >>confdefs.h
+-
++    ;;
++  *-*-serenity*)
++    $as_echo "#define HAVE_PSIGNAL 1" >>confdefs.h
+     ;;
+ esac
+