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authorAlex Richardson <arichardson@FreeBSD.org>2020-08-25 13:23:31 +0000
committerAlex Richardson <arichardson@FreeBSD.org>2020-08-25 13:23:31 +0000
commit7ec1ec4fdb98d87602c8501dae9b9cbd24b7d22b (patch)
treee0c68e3e2ec5ef91266afe23d2e5423bc06489a1 /tools/build/cross-build
parentd141d1cc5f9a204a1eeb4b564e4cfa1821fe287e (diff)
downloadsrc-7ec1ec4fdb98d87602c8501dae9b9cbd24b7d22b.tar.gz
src-7ec1ec4fdb98d87602c8501dae9b9cbd24b7d22b.zip
Add missing FreeBSD functions to -legacy when building on macOS/Linux
In most cases this simply builds the file from lib/libc for missing functions (e.g. strlcpy on Linux etc.). In cases where this is not possible I've added an implementation to tools/build/cross-build. The fgetln.c/fgetwln.c/closefrom.c compatibility code was obtained from https://gitlab.freedesktop.org/libbsd/libbsd, but I'm not sure it makes sense to import it into to contrib just for these three bootstrap files. Reviewed By: brooks Differential Revision: https://reviews.freebsd.org/D25978
Notes
Notes: svn path=/head/; revision=364759
Diffstat (limited to 'tools/build/cross-build')
-rw-r--r--tools/build/cross-build/capsicum_stubs.c67
-rw-r--r--tools/build/cross-build/closefrom.c192
-rw-r--r--tools/build/cross-build/fake_sysctl.c58
-rw-r--r--tools/build/cross-build/fgetln_fallback.c84
-rw-r--r--tools/build/cross-build/fgetwln_fallback.c93
-rw-r--r--tools/build/cross-build/local-link.h38
-rw-r--r--tools/build/cross-build/progname.c53
7 files changed, 585 insertions, 0 deletions
diff --git a/tools/build/cross-build/capsicum_stubs.c b/tools/build/cross-build/capsicum_stubs.c
new file mode 100644
index 000000000000..b042796c069f
--- /dev/null
+++ b/tools/build/cross-build/capsicum_stubs.c
@@ -0,0 +1,67 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+ * DARPA SSITH research programme.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/capsicum.h>
+
+#include <errno.h>
+
+int
+cap_ioctls_limit(int fd, const cap_ioctl_t *cmds, size_t ncmds)
+{
+ return 0; /* Just pretend that it succeeded */
+}
+
+int
+cap_fcntls_limit(int fd, uint32_t fcntlrights)
+{
+ return 0; /* Just pretend that it succeeded */
+}
+
+int
+cap_rights_limit(int fd, const cap_rights_t *rights)
+{
+ return 0; /* Just pretend that it succeeded */
+}
+
+int
+cap_enter(void)
+{
+ errno = ENOSYS;
+ return -1;
+}
diff --git a/tools/build/cross-build/closefrom.c b/tools/build/cross-build/closefrom.c
new file mode 100644
index 000000000000..9d037f0efe89
--- /dev/null
+++ b/tools/build/cross-build/closefrom.c
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2004-2005, 2007, 2010, 2012-2014
+ * Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+// #include <config.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#include <fcntl.h>
+#include <limits.h>
+#ifdef HAVE_PSTAT_GETPROC
+# include <sys/param.h>
+# include <sys/pstat.h>
+#else
+# ifdef HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen((dirent)->d_name)
+# else
+# define dirent direct
+# define NAMLEN(dirent) (dirent)->d_namlen
+# ifdef HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# ifdef HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# ifdef HAVE_NDIR_H
+# include <ndir.h>
+# endif
+# endif
+#endif
+
+#ifndef OPEN_MAX
+# define OPEN_MAX 256
+#endif
+
+#if defined(HAVE_FCNTL_CLOSEM) && !defined(HAVE_DIRFD)
+# define closefrom closefrom_fallback
+#endif
+
+static inline void
+closefrom_close(int fd)
+{
+#ifdef __APPLE__
+ /* Avoid potential libdispatch crash when we close its fds. */
+ (void)fcntl(fd, F_SETFD, FD_CLOEXEC);
+#else
+ (void)close(fd);
+#endif
+}
+
+/*
+ * Close all file descriptors greater than or equal to lowfd.
+ * This is the expensive (fallback) method.
+ */
+void
+closefrom_fallback(int lowfd)
+{
+ long fd, maxfd;
+
+ /*
+ * Fall back on sysconf() or getdtablesize(). We avoid checking
+ * resource limits since it is possible to open a file descriptor
+ * and then drop the rlimit such that it is below the open fd.
+ */
+#ifdef HAVE_SYSCONF
+ maxfd = sysconf(_SC_OPEN_MAX);
+#else
+ maxfd = getdtablesize();
+#endif /* HAVE_SYSCONF */
+ if (maxfd < 0)
+ maxfd = OPEN_MAX;
+
+ for (fd = lowfd; fd < maxfd; fd++)
+ closefrom_close(fd);
+}
+
+/*
+ * Close all file descriptors greater than or equal to lowfd.
+ * We try the fast way first, falling back on the slow method.
+ */
+#if defined(HAVE_FCNTL_CLOSEM)
+void
+closefrom(int lowfd)
+{
+ if (fcntl(lowfd, F_CLOSEM, 0) == -1)
+ closefrom_fallback(lowfd);
+}
+#elif defined(HAVE_PSTAT_GETPROC)
+void
+closefrom(int lowfd)
+{
+ struct pst_status pstat;
+ int fd;
+
+ if (pstat_getproc(&pstat, sizeof(pstat), 0, getpid()) != -1) {
+ for (fd = lowfd; fd <= pstat.pst_highestfd; fd++)
+ (void)close(fd);
+ } else {
+ closefrom_fallback(lowfd);
+ }
+}
+#elif defined(HAVE_DIRFD)
+static int
+closefrom_procfs(int lowfd)
+{
+ const char *path;
+ DIR *dirp;
+ struct dirent *dent;
+ int *fd_array = NULL;
+ int fd_array_used = 0;
+ int fd_array_size = 0;
+ int ret = 0;
+ int i;
+
+ /* Use /proc/self/fd (or /dev/fd on FreeBSD) if it exists. */
+# if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__)
+ path = "/dev/fd";
+# else
+ path = "/proc/self/fd";
+# endif
+ dirp = opendir(path);
+ if (dirp == NULL)
+ return -1;
+
+ while ((dent = readdir(dirp)) != NULL) {
+ const char *errstr;
+ int fd;
+
+ fd = strtonum(dent->d_name, lowfd, INT_MAX, &errstr);
+ if (errstr != NULL || fd == dirfd(dirp))
+ continue;
+
+ if (fd_array_used >= fd_array_size) {
+ int *ptr;
+
+ if (fd_array_size > 0)
+ fd_array_size *= 2;
+ else
+ fd_array_size = 32;
+
+ ptr = reallocarray(fd_array, fd_array_size, sizeof(int));
+ if (ptr == NULL) {
+ ret = -1;
+ break;
+ }
+ fd_array = ptr;
+ }
+
+ fd_array[fd_array_used++] = fd;
+ }
+
+ for (i = 0; i < fd_array_used; i++)
+ closefrom_close(fd_array[i]);
+
+ free(fd_array);
+ (void)closedir(dirp);
+
+ return ret;
+}
+
+void
+closefrom(int lowfd)
+{
+ if (closefrom_procfs(lowfd) == 0)
+ return;
+
+ closefrom_fallback(lowfd);
+}
+#endif /* HAVE_FCNTL_CLOSEM */
diff --git a/tools/build/cross-build/fake_sysctl.c b/tools/build/cross-build/fake_sysctl.c
new file mode 100644
index 000000000000..7b9524e1626b
--- /dev/null
+++ b/tools/build/cross-build/fake_sysctl.c
@@ -0,0 +1,58 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+ * DARPA SSITH research programme.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/* This file contains wrappers for sysctls used during build/install */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <err.h>
+#include <string.h>
+#include <sysexits.h>
+
+int
+__freebsd_sysctlbyname(
+ const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen)
+{
+ if (strcmp(name, "kern.vm_guest") == 0) {
+ if (!oldp || !oldlenp)
+ errx(EX_USAGE, "Missing arguments for kern.vm_guest");
+
+ if (newp || newlen)
+ errx(EX_USAGE, "kern.vm_guest is read-only");
+ strlcpy(oldp, "none", *oldlenp);
+ *oldlenp = strlen("none");
+ }
+ errx(EX_USAGE, "fatal: unknown sysctl %s\n", name);
+}
diff --git a/tools/build/cross-build/fgetln_fallback.c b/tools/build/cross-build/fgetln_fallback.c
new file mode 100644
index 000000000000..9bd202c125da
--- /dev/null
+++ b/tools/build/cross-build/fgetln_fallback.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright © 2005 Hector Garcia Alvarez
+ * Copyright © 2005, 2008-2012 Guillem Jover <guillem@hadrons.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <string.h>
+
+#include "local-link.h"
+
+#define HAVE_GETLINE 1
+#ifdef HAVE_GETLINE
+struct filebuf {
+ FILE *fp;
+ char *buf;
+ size_t len;
+};
+
+#define FILEBUF_POOL_ITEMS 32
+
+static struct filebuf fb_pool[FILEBUF_POOL_ITEMS];
+static int fb_pool_cur;
+
+char *
+fgetln(FILE *stream, size_t *len)
+{
+ struct filebuf *fb;
+ ssize_t nread;
+
+ flockfile(stream);
+
+ /* Try to diminish the possibility of several fgetln() calls being
+ * used on different streams, by using a pool of buffers per file. */
+ fb = &fb_pool[fb_pool_cur];
+ if (fb->fp != stream && fb->fp != NULL) {
+ fb_pool_cur++;
+ fb_pool_cur %= FILEBUF_POOL_ITEMS;
+ fb = &fb_pool[fb_pool_cur];
+ }
+ fb->fp = stream;
+
+ nread = getline(&fb->buf, &fb->len, stream);
+
+ funlockfile(stream);
+
+ /* Note: the getdelim/getline API ensures nread != 0. */
+ if (nread == -1) {
+ *len = 0;
+ return NULL;
+ } else {
+ *len = (size_t)nread;
+ return fb->buf;
+ }
+}
+libbsd_link_warning(fgetln,
+ "This function cannot be safely ported, use getline(3) "
+ "instead, as it is supported by GNU and POSIX.1-2008.")
+#else
+#error "Function fgetln() needs to be ported."
+#endif
diff --git a/tools/build/cross-build/fgetwln_fallback.c b/tools/build/cross-build/fgetwln_fallback.c
new file mode 100644
index 000000000000..17254743fbc4
--- /dev/null
+++ b/tools/build/cross-build/fgetwln_fallback.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2012 Guillem Jover <guillem@hadrons.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <wchar.h>
+
+#include "local-link.h"
+
+struct filewbuf {
+ FILE *fp;
+ wchar_t *wbuf;
+ size_t len;
+};
+
+#define FILEWBUF_INIT_LEN 128
+#define FILEWBUF_POOL_ITEMS 32
+
+static struct filewbuf fb_pool[FILEWBUF_POOL_ITEMS];
+static int fb_pool_cur;
+
+wchar_t *
+fgetwln(FILE *stream, size_t *lenp)
+{
+ struct filewbuf *fb;
+ wint_t wc;
+ size_t wused = 0;
+
+ /* Try to diminish the possibility of several fgetwln() calls being
+ * used on different streams, by using a pool of buffers per file. */
+ fb = &fb_pool[fb_pool_cur];
+ if (fb->fp != stream && fb->fp != NULL) {
+ fb_pool_cur++;
+ fb_pool_cur %= FILEWBUF_POOL_ITEMS;
+ fb = &fb_pool[fb_pool_cur];
+ }
+ fb->fp = stream;
+
+ while ((wc = fgetwc(stream)) != WEOF) {
+ if (!fb->len || wused >= fb->len) {
+ wchar_t *wp;
+
+ if (fb->len)
+ fb->len *= 2;
+ else
+ fb->len = FILEWBUF_INIT_LEN;
+
+ wp = reallocarray(fb->wbuf, fb->len, sizeof(wchar_t));
+ if (wp == NULL) {
+ wused = 0;
+ break;
+ }
+ fb->wbuf = wp;
+ }
+
+ fb->wbuf[wused++] = wc;
+
+ if (wc == L'\n')
+ break;
+ }
+
+ *lenp = wused;
+ return wused ? fb->wbuf : NULL;
+}
+
+libbsd_link_warning(fgetwln,
+ "This function cannot be safely ported, use fgetwc(3) "
+ "instead, as it is supported by C99 and POSIX.1-2001.")
diff --git a/tools/build/cross-build/local-link.h b/tools/build/cross-build/local-link.h
new file mode 100644
index 000000000000..a7534b22be68
--- /dev/null
+++ b/tools/build/cross-build/local-link.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2015 Guillem Jover <guillem@hadrons.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBBSD_LOCAL_LINK_H
+#define LIBBSD_LOCAL_LINK_H
+
+#ifdef notyet
+#define libbsd_link_warning(symbol, msg) \
+ static const char libbsd_emit_link_warning_##symbol[] \
+ __attribute__((__used__,__section__(".gnu.warning." #symbol))) = msg;
+#else
+#define libbsd_link_warning(symbol, msg)
+#endif
+
+#endif
diff --git a/tools/build/cross-build/progname.c b/tools/build/cross-build/progname.c
new file mode 100644
index 000000000000..645227df48d7
--- /dev/null
+++ b/tools/build/cross-build/progname.c
@@ -0,0 +1,53 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory (Department of Computer Science and
+ * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
+ * DARPA SSITH research programme.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdlib.h>
+
+#ifdef __GLIBC__
+extern const char *__progname;
+const char *
+getprogname(void)
+{
+ return (__progname);
+}
+void
+setprogname(const char *progname)
+{
+ __progname = progname;
+}
+#endif /* __GLIBC__ */