If action-if-found is not specified, AC_CHECK_LIB will append the library
to LIBS. As we don't want to link everything against libelf, reset LIBS
after doing the checks.
PKG_CHECK_MODULES([LIBELF], [libelf], [have_libelf=yes], [have_libelf=maybe])
if test $have_libelf = maybe; then
PKG_CHECK_MODULES([LIBELF], [libelf], [have_libelf=yes], [have_libelf=maybe])
if test $have_libelf = maybe; then
AC_CHECK_LIB([elf], [elf_begin], , [have_libelf=no])
AC_CHECK_LIB([elf], [elf_getshdrstrndx], , [have_libelf=no])
AC_CHECK_LIB([elf], [elf_getshdrnum], , [have_libelf=no])
AC_CHECK_HEADER([libelf.h], , [have_libelf=no])
AC_CHECK_LIB([elf], [elf_begin], , [have_libelf=no])
AC_CHECK_LIB([elf], [elf_getshdrstrndx], , [have_libelf=no])
AC_CHECK_LIB([elf], [elf_getshdrnum], , [have_libelf=no])
AC_CHECK_HEADER([libelf.h], , [have_libelf=no])
if test $have_libelf != no; then
LIBELF_LIBS=-lelf
if test $have_libelf != no; then
LIBELF_LIBS=-lelf