Get rid of GNU libelf and its autoconf nastiness and replace

it with FreeBSD's implementation

--HG--
extra : convert_revision : ef9c4551b9a6b54b76a89f286ff9804c55790621

1 files changed, 54 insertions, 0 deletions

diff --git a/ext/libelf/gelf_checksum.c b/ext/libelf/gelf_checksum.c
new file mode 100644
index 000000000..105cd2883
--- /dev/null
+++ b/ext/libelf/gelf_checksum.c
@@ -0,0 +1,54 @@
+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * All rights reserved.
+ *
+ * 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 "gelf.h"
+#include "libelf.h"
+
+#include "_libelf.h"
+
+long
+elf32_checksum(Elf *e)
+{
+        return (_libelf_checksum(e, ELFCLASS32));
+}
+
+long
+elf64_checksum(Elf *e)
+{
+        return (_libelf_checksum(e, ELFCLASS64));
+}
+
+long
+gelf_checksum(Elf *e)
+{
+        int ec;
+        if (e == NULL ||
+            ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
+                LIBELF_SET_ERROR(ARGUMENT, 0);
+                return (0L);
+        }
+        return (_libelf_checksum(e, ec));
+}