From 84603d804c285c75f4bf81f9d79f0ebd0ca68fea Mon Sep 17 00:00:00 2001
From: Adrien Destugues <pulkomandy@pulkomandy.tk>
Date: Mon, 3 Mar 2014 15:47:08 +0100
Subject: [PATCH] Haiku: Enable CMake builtin ELF editor

Co-Author: Brad King <brad.king@kitware.com>
---
 Source/CMakeLists.txt | 18 ++++++++++++++++++
 Source/cmELF.cxx      | 20 ++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 762470fc2..27d099d40 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -18,6 +18,23 @@ else()
 endif()
 if(HAVE_ELF_H)
   set(CMAKE_USE_ELF_PARSER 1)
+elseif(HAIKU)
+  # On Haiku, we need to include elf32.h from the private headers
+  set(CMake_HAIKU_INCLUDE_DIRS
+    /boot/system/develop/headers/private/system
+    /boot/system/develop/headers/private/system/arch/x86
+    )
+
+  set(CMAKE_REQUIRED_INCLUDES ${CMake_HAIKU_INCLUDE_DIRS})
+  CHECK_INCLUDE_FILE("elf32.h" HAVE_ELF32_H)
+  unset(CMAKE_REQUIRED_INCLUDES)
+
+  if(HAVE_ELF32_H)
+    set(CMAKE_USE_ELF_PARSER 1)
+  else()
+    unset(CMake_HAIKU_INCLUDE_DIRS)
+    set(CMAKE_USE_ELF_PARSER)
+  endif()
 else()
   set(CMAKE_USE_ELF_PARSER)
 endif()
@@ -57,6 +74,7 @@ include_directories(
   ${CMAKE_EXPAT_INCLUDES}
   ${CMAKE_TAR_INCLUDES}
   ${CMAKE_COMPRESS_INCLUDES}
+  ${CMake_HAIKU_INCLUDE_DIRS}
   )
 
 # let cmake know it is supposed to use it
diff --git a/Source/cmELF.cxx b/Source/cmELF.cxx
index bc1c25ba1..dc6772c1b 100644
--- a/Source/cmELF.cxx
+++ b/Source/cmELF.cxx
@@ -23,6 +23,26 @@
 #if defined(__OpenBSD__)
 # include <stdint.h>
 # include <elf_abi.h>
+#elif defined(__HAIKU__)
+# include <elf32.h>
+# include <elf64.h>
+  typedef struct Elf32_Ehdr Elf32_Ehdr;
+  typedef struct Elf32_Shdr Elf32_Shdr;
+  typedef struct Elf32_Sym Elf32_Sym;
+  typedef struct Elf32_Rel Elf32_Rel;
+  typedef struct Elf32_Rela Elf32_Rela;
+# define ELFMAG0 0x7F
+# define ELFMAG1 'E'
+# define ELFMAG2 'L'
+# define ELFMAG3 'F'
+# define ET_NONE 0
+# define ET_REL 1
+# define ET_EXEC 2
+# define ET_DYN 3
+# define ET_CORE 4
+# define EM_386 3
+# define EM_SPARC 2
+# define EM_PPC 20
 #else
 # include <elf.h>
 #endif