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# - Try to find libelf
# Referenced by the find_package() command from the top-level
# CMakeLists.txt.
# Once done this will define
#
# LIBELF_FOUND - system has libelf
# LIBELF_INCLUDE_DIRS - the libelf include directory
# LIBELF_LIBRARIES - Link these to use libelf
# LIBELF_DEFINITIONS - Compiler switches required for using libelf
#
# This module reads hints about search locations from variables:
#
# LIBELF_ROOT - Preferred installation prefix
#
# Copyright (c) 2008 Bernhard Walle <bernhard.walle@gmx.de>
#
# Redistribution and use is allowed according to the terms of the New
# BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
#
if (NOT DWARF_WITH_LIBELF)
return()
endif ()
if (LIBELF_LIBRARIES AND LIBELF_INCLUDE_DIRS)
set (LibElf_FIND_QUIETLY TRUE)
endif (LIBELF_LIBRARIES AND LIBELF_INCLUDE_DIRS)
find_path (LIBELF_INCLUDE_DIRS
NAMES
libelf/libelf.h libelf.h
HINTS
${LIBELF_ROOT}
PATH_SUFFIXES
include
libelf/include
)
if (NOT LIBELF_INCLUDE_DIRS)
set (DWARF_WITH_LIBELF OFF)
return ()
endif()
find_library (LIBELF_LIBRARIES
NAMES
elf libelf
HINTS
${LIBELF_ROOT}
PATH_SUFFIXES
lib
libelf/lib
)
if (NOT LIBELF_LIBRARIES)
set (DWARF_WITH_LIBELF OFF)
return ()
endif()
include (FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set LIBELF_FOUND to TRUE if all listed variables are TRUE
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibElf DEFAULT_MSG
LIBELF_LIBRARIES
LIBELF_INCLUDE_DIRS)
set(CMAKE_REQUIRED_LIBRARIES elf)
include(CheckCSourceCompiles)
check_c_source_compiles("#include <libelf.h>
int main() {
Elf *e = (Elf*)0;
size_t sz;
elf_getshdrstrndx(e, &sz);
return 0;
}" ELF_GETSHDRSTRNDX)
unset(CMAKE_REQUIRED_LIBRARIES)
mark_as_advanced(LIBELF_INCLUDE_DIRS LIBELF_LIBRARIES ELF_GETSHDRSTRNDX)
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