dnl Process this file with autoconf to produce a configure script.
dnl Configure input file for elfutils.                     -*-autoconf-*-
dnl
dnl Copyright (C) 1996-2011 Red Hat, Inc.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation, version 2.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software Foundation,
dnl Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
dnl
AC_INIT([Red Hat elfutils],[0.152],[http://bugzilla.redhat.com/bugzilla/],[elfutils])

AC_CONFIG_AUX_DIR([config])
AC_CONFIG_FILES([config/Makefile])

AC_COPYRIGHT([Copyright (C) 1996-2010 Red Hat, Inc.])
AC_PREREQ(2.63)			dnl Minimum Autoconf version required.

dnl We use GNU make extensions; automake 1.10 defaults to -Wportability.
AM_INIT_AUTOMAKE([gnits 1.8 -Wno-portability dist-bzip2 no-dist-gzip])
AM_MAINTAINER_MODE

dnl Unique ID for this build.
MODVERSION="Build on $(hostname) $(date +%FT%R:%S%z)"
AC_SUBST([MODVERSION])
AC_DEFINE_UNQUOTED(MODVERSION, "$MODVERSION")
AH_TEMPLATE([MODVERSION], [Identifier for modules in the build.])

AC_CONFIG_SRCDIR([libelf/libelf.h])
AC_CONFIG_FILES([Makefile])
AC_CONFIG_HEADERS([config.h])

AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_FILES([m4/Makefile])

dnl The RPM spec file.  We substitute a few values in the file.
AC_CONFIG_FILES([elfutils.spec:config/elfutils.spec.in])


AC_CANONICAL_HOST

AC_ARG_ENABLE([thread-safety],
AS_HELP_STRING([--enable-thread-safety], [enable thread safety of libraries]),
use_tls=locks, use_locks=no)
AM_CONDITIONAL(USE_LOCKS, test "$use_locks" = yes)
AS_IF([test "$use_locks" = yes], [AC_DEFINE(USE_LOCKS)])

AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])

AC_PROG_CC
AC_PROG_RANLIB
AC_PROG_YACC
AM_PROG_LEX

AC_CACHE_CHECK([for gcc with C99 support], ac_cv_c99, [dnl
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -std=gnu99"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([dnl
int foo (int a) { for (int i = 0; i < a; ++i) if (i % 4) break; int s = a; }])],
		  ac_cv_c99=yes, ac_cv_c99=no)
CFLAGS="$old_CFLAGS"])
AS_IF([test "x$ac_cv_c99" != xyes],
      AC_MSG_ERROR([gcc with C99 support required]))

AC_CACHE_CHECK([for -Wextra option to $CC], ac_cv_cc_wextra, [dnl
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wextra"
AC_COMPILE_IFELSE([void foo (void) { }],
		  ac_cv_cc_wextra=yes, ac_cv_cc_wextra=no)
CFLAGS="$old_CFLAGS"])
AC_SUBST(WEXTRA)
AS_IF([test "x$ac_cv_cc_wextra" = xyes], [WEXTRA=-Wextra], [WEXTRA=-W])

AC_CACHE_CHECK([for -fgnu89-inline option to $CC], ac_cv_cc_gnu89_inline, [dnl
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fgnu89-inline -Werror"
AC_COMPILE_IFELSE([
void foo (void)
{
  inline void bar (void) {}
  bar ();
}
extern inline void baz (void) {}
], ac_cv_cc_gnu89_inline=yes, ac_cv_cc_gnu89_inline=no)
CFLAGS="$old_CFLAGS"])
AS_IF([test "x$ac_cv_cc_gnu89_inline" = xyes],
      [WEXTRA="${WEXTRA:+$WEXTRA }-fgnu89-inline"])

AC_CACHE_CHECK([for --as-needed linker option],
	       ac_cv_as_needed, [dnl
cat > conftest.c <<EOF
int main (void) { return 0; }
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
			    -fPIC -shared -o conftest.so conftest.c
			    -Wl,--as-needed 1>&AS_MESSAGE_LOG_FD])
then
  ac_cv_as_needed=yes
else
  ac_cv_as_needed=no
fi
rm -f conftest*])
AS_IF([test "x$ac_cv_as_needed" = xyes],
      [LD_AS_NEEDED=-Wl,--as-needed], [LD_AS_NEEDED=])
AC_SUBST(LD_AS_NEEDED)

AC_CACHE_CHECK([for __builtin_popcount], ac_cv_popcount, [dnl
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[exit (__builtin_popcount (127));]])],
	       ac_cv_popcount=yes, ac_cv_popcount=no)])
AS_IF([test "x$ac_cv_popcount" = xyes],
      [AC_DEFINE([HAVE_BUILTIN_POPCOUNT], [1], [Have __builtin_popcount.])])

AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl
# Use the same flags that we use for our DSOs, so the test is representative.
# Some old compiler/linker/libc combinations fail some ways and not others.
save_CFLAGS="$CFLAGS"
save_LDFLAGS="$LDFLAGS"
CFLAGS="-fpic $CFLAGS"
LDFLAGS="-shared -Wl,-z,defs,-z,relro $LDFLAGS"
AC_LINK_IFELSE([dnl
AC_LANG_PROGRAM([[#undef __thread
static __thread int a; int foo (int b) { return a + b; }]],
		[[exit (foo (0));]])],
	       ac_cv_tls=yes, ac_cv_tls=no)
CFLAGS="$save_CFLAGS"
LDFLAGS="$save_LDFLAGS"])
AS_IF([test "x$ac_cv_tls" != xyes],
      [AS_IF([test "$use_locks" = yes],
	     [AC_MSG_ERROR([--enable-thread-safety requires __thread support])],
	     [AC_DEFINE([__thread], [/* empty: no multi-thread support */],
			[Stubbed out if missing compiler support.])])])

dnl This test must come as early as possible after the compiler configuration
dnl tests, because the choice of the file model can (in principle) affect
dnl whether functions and headers are available, whether they work, etc.
AC_SYS_LARGEFILE

dnl Enable the linker to be build as a native-only linker.  By default it
dnl can handle all architectures but this comes at a cost.  A native
dnl will be slightly faster, small, and has fewer dependencies.
native_ld=no
AC_ARG_ENABLE([generic],
AS_HELP_STRING([--disable-generic], [do not build generic linker]), [dnl
if test "$enable_generic" = no; then
  case "$host_cpu" in
   i?86)
    AC_DEFINE(NATIVE_ELF, 32)
    native_ld=yes
    base_cpu=i386
    ;;
   *)
    AC_MSG_ERROR([no machine-specific linker for this configuration available])
    ;;
  esac
fi])
AH_TEMPLATE([NATIVE_ELF],
[Define to 32 or 64 if a specific implementation is wanted.])
AM_CONDITIONAL(NATIVE_LD, test "$native_ld" = yes)
dnl The automake generated Makefile cannot deal with macros in the name
dnl of files if at any time there is no such file, even if the filename
dnl would not be used.
AS_IF([test -z "$base_cpu"], [base_cpu=none])
AC_SUBST(base_cpu)
dnl Support to work around automake's inflexible dependency generation.
dnl See src/Makefile.am for more information.
AM_CONDITIONAL(NEVER, false)

dnl Enable debugging via mudflap.  This option will cause most libraries
dnl to be built as archives which are statically linked into the applications.
dnl All code, as far as possible, is compiled instrumented to catch all
dnl the bugs valgrind is able to catch.
use_mudflap=no
AC_ARG_ENABLE([mudflap],
AS_HELP_STRING([--enable-mudflap],
[build binaries with mudflap instrumentation]), [dnl
if test "x$enable_mudflap" = xyes; then
  # Check whether the compiler support -fmudflap.
  old_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -fmudflap"
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[use_mudflap=yes],[use_mudflap=fail])
  CFLAGS="$old_CFLAGS"
fi])
if test "$use_mudflap" = fail; then
  AC_MSG_FAILURE([--enable-mudflap requires a compiler which understands this option])
fi
AM_CONDITIONAL(MUDFLAP, test "$use_mudflap" = yes)

dnl enable debugging of branch prediction.
use_debugpred=0
AC_ARG_ENABLE([debugpred],
AS_HELP_STRING([--enable-debugpred],[build binaries with support to debug branch prediction]),
[use_debugpred=1], [use_debugpred=0])
AC_SUBST([DEBUGPRED], $use_debugpred)

dnl Enable gprof suport.
AC_ARG_ENABLE([gprof],
AS_HELP_STRING([--enable-gprof],[build binaries with gprof support]), [use_gprof=yes], [use_gprof=no])
if test "$use_gprof" = yes; then
  CFLAGS="$CFLAGS -pg"
  LDFLAGS="$LDFLAGS -pg"
fi
AM_CONDITIONAL(GPROF, test "$use_gprof" = yes)

# Enable gcov suport.
AC_ARG_ENABLE([gcov],
AS_HELP_STRING([--enable-gcov],[build binaries with gcov support]), [use_gcov=yes], [use_gcov=no])
if test "$use_gcov" = yes; then
  CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
  LDFLAGS="$LDFLAGS -fprofile-arcs"
fi
AM_CONDITIONAL(GCOV, test "$use_gcov" = yes)

AM_CONDITIONAL(BUILD_STATIC, [dnl
test "$use_mudflap" = yes -o "$use_gprof" = yes -o "$use_gcov" = yes])

AC_ARG_ENABLE([tests-rpath],
AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]),
 	       [tests_use_rpath=yes], [tests_use_rpath=no])
AM_CONDITIONAL(TESTS_RPATH, test "$tests_use_rpath" = yes)

LIBEBL_SUBDIR="$PACKAGE"
AC_ARG_ENABLE([libebl-subdir],
AS_HELP_STRING([--enable-libebl-subdir=DIR],
[install libebl_CPU modules in $(libdir)/DIR]), [dnl
LIBEBL_SUBDIR="$enable_libebl_subdir"])
AC_SUBST([LIBEBL_SUBDIR])
AC_DEFINE_UNQUOTED(LIBEBL_SUBDIR, "$LIBEBL_SUBDIR")
AH_TEMPLATE([LIBEBL_SUBDIR], [$libdir subdirectory containing libebl modules.])

dnl Test for zlib and bzlib, gives ZLIB/BZLIB .am
dnl conditional and config.h USE_ZLIB/USE_BZLIB #define.
save_LIBS="$LIBS"
LIBS=
eu_ZIPLIB(zlib,ZLIB,z,gzdirect,gzip)
eu_ZIPLIB(bzlib,BZLIB,bz2,BZ2_bzdopen,bzip2)
eu_ZIPLIB(lzma,LZMA,lzma,lzma_auto_decoder,[LZMA (xz)])
zip_LIBS="$LIBS"
LIBS="$save_LIBS"
AC_SUBST([zip_LIBS])

dnl The directories with content.

dnl Documentation.
dnl Commented out for now.
dnl AC_CONFIG_FILES([doc/Makefile])

dnl Support library.
AC_CONFIG_FILES([lib/Makefile])

dnl ELF library.
AC_CONFIG_FILES([libelf/Makefile])

dnl Higher-level ELF support library.
AC_CONFIG_FILES([libebl/Makefile])

dnl DWARF library.
AC_CONFIG_FILES([libdw/Makefile])

dnl Higher-level DWARF support library.
AC_CONFIG_FILES([libdwfl/Makefile])

dnl CPU handling library.
AC_CONFIG_FILES([libcpu/Makefile])

dnl Assembler library.
AM_CONDITIONAL(HAVE_LIBASM, true)dnl Used in tests/Makefile.am, which see.
AC_CONFIG_FILES([libasm/Makefile])

dnl CPU-specific backend libraries.
AC_CONFIG_FILES([backends/Makefile])

dnl Tools.
AC_CONFIG_FILES([src/Makefile po/Makefile.in])

dnl Test suite.
AM_CONDITIONAL(STANDALONE, false)dnl Used in tests/Makefile.am, which see.
AC_CONFIG_FILES([tests/Makefile])

# Get the definitions necessary to create the Makefiles in the po
# subdirectories.  This is a small subset of the gettext rules.
AC_SUBST(USE_NLS, yes)
AM_PO_SUBDIRS

dnl Appended to the config.h file.
dnl We hide all kinds of configuration magic in lib/eu-config.h.
AH_BOTTOM([#include <eu-config.h>])

dnl Version compatibility header.
AC_CONFIG_FILES([version.h:config/version.h.in])
AC_SUBST([eu_version])

# 1.234<whatever> -> 1234<whatever>
case "$PACKAGE_VERSION" in
[[0-9]].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
*)     	   AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
esac
case "$eu_version" in
*.*)
  # 1234.567 -> "1234", "567"
  eu_extra_version="${eu_version#*.}"
  eu_version="${eu_version%%.*}"
  case "$eu_extra_version" in
  [[0-9]][[0-9]][[0-9]]) ;;
  [[0-9]][[0-9]])	eu_extra_version="${eu_extra_version}0" ;;
  [[0-9]])	   	eu_extra_version="${eu_extra_version}00" ;;
  *) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
  esac
  ;;
*)
  eu_extra_version=000
  ;;
esac

case "$eu_version" in
      0[[0-9]][[0-9]][[0-9]]) eu_version="${eu_version#0}$eu_extra_version" ;;
[[0-9]][[0-9]][[0-9]][[0-9]]) eu_version="${eu_version}$eu_extra_version" ;;
[[0-9]][[0-9]][[0-9]])	      eu_version="${eu_version}0$eu_extra_version" ;;
[[0-9]][[0-9]])	  	      eu_version="${eu_version}00$eu_extra_version";;
*) AC_MSG_ERROR([confused by version number '$PACKAGE_VERSION']) ;;
esac

# Round up to the next release API (x.y) version.
eu_version=`expr \( $eu_version + 999 \) / 1000`

AC_OUTPUT