dnl  Copyright 2005 Red Hat, Inc.
dnl 
dnl  Permission to use, copy, modify, distribute, and sell this software and its
dnl  documentation for any purpose is hereby granted without fee, provided that
dnl  the above copyright notice appear in all copies and that both that
dnl  copyright notice and this permission notice appear in supporting
dnl  documentation, and that the name of Red Hat not be used in
dnl  advertising or publicity pertaining to distribution of the software without
dnl  specific, written prior permission.  Red Hat makes no
dnl  representations about the suitability of this software for any purpose.  It
dnl  is provided "as is" without express or implied warranty.
dnl 
dnl  RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
dnl  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
dnl  EVENT SHALL RED HAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
dnl  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
dnl  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
dnl  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
dnl  PERFORMANCE OF THIS SOFTWARE.
dnl
dnl Process this file with autoconf to create configure.

AC_PREREQ([2.57])

#   Pixman versioning scheme
#
#   - The git version must at all times have an odd MICRO version
#     number.
#
#   - If you add API, increment the MICRO version to the next largest
#     odd number.
#
#   - If you release a version that contains new API, then increment
#     MINOR and set MICRO to 0. 
#
#   - If you release a new version that does not contain new API, then
#     increment MICRO to the next even number.
#
#   - After doing a release, increment MICRO again to make the version 
#     number in git odd.
#
#   - If you break the ABI, then
#
#        - increment MAJOR
#
#        - In the first development release where you break ABI, find
#          all instances of "pixman-n" and change them to pixman-(n+1)
#
#          This needs to be done at least in 
#                    configure.ac
#                    all Makefile.am's
#                    pixman-n.pc.in
#
#      This ensures that binary incompatible versions can be installed
#      in parallel.  See http://www106.pair.com/rhp/parallel.html for
#      more information

m4_define([pixman_major], 0)
m4_define([pixman_minor], 11)
m4_define([pixman_micro], 7)

m4_define([pixman_version],[pixman_major.pixman_minor.pixman_micro])

AC_INIT(pixman, pixman_version, "sandmann@daimi.au.dk", pixman)
AM_INIT_AUTOMAKE([dist-bzip2])

AM_CONFIG_HEADER(config.h)

AC_PROG_CC
AC_PROG_LIBTOOL
AC_CHECK_FUNCS([getisax])
AC_C_BIGENDIAN

# 
# We ignore pixman_major in the version here because the major version should
# always be encoded in the actual library name. Ie., the soname is:
#
#      pixman-$(pixman_major).0.minor.micro
#
m4_define([lt_current], [pixman_minor])
m4_define([lt_revision], [pixman_micro])
m4_define([lt_age], [pixman_minor])

LT_VERSION_INFO="lt_current:lt_revision:lt_age"

PIXMAN_VERSION_MAJOR=pixman_major()
AC_SUBST(PIXMAN_VERSION_MAJOR)
PIXMAN_VERSION_MINOR=pixman_minor()
AC_SUBST(PIXMAN_VERSION_MINOR)
PIXMAN_VERSION_MICRO=pixman_micro()
AC_SUBST(PIXMAN_VERSION_MICRO)

AC_SUBST(LT_VERSION_INFO)

# Check for dependencies
#PKG_CHECK_MODULES(DEP, x11)

changequote(,)dnl
if test "x$GCC" = "xyes"; then
  case " $CFLAGS " in
  *[\ \	]-Wall[\ \	]*) ;;
  *) CFLAGS="$CFLAGS -Wall" ;;
  esac fi changequote([,])dnl

AC_PATH_PROG(PERL, perl, no)
if test "x$PERL" = xno; then
    AC_MSG_ERROR([Perl is required to build pixman.])
fi
AC_SUBST(PERL)

dnl =========================================================================
dnl -fvisibility stuff

have_gcc4=no
AC_MSG_CHECKING(for -fvisibility)
AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ >= 4)
#else
#error Need GCC 4.0 for visibility
#endif
int main () { return 0; } 
], have_gcc4=yes)

if test "x$have_gcc4" = "xyes"; then
   CFLAGS="$CFLAGS -fvisibility=hidden"
fi
AC_MSG_RESULT($have_gcc4)

dnl ===========================================================================
dnl Check for MMX

MMX_CFLAGS="-mmmx -Winline"

if test "x$GCC" = "xyes"; then
    MMX_CFLAGS="$MMX_CFLAGS --param inline-unit-growth=10000 --param large-function-growth=10000"
fi

have_mmx_intrinsics=no
AC_MSG_CHECKING(whether to use MMX intrinsics)
xserver_save_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $MMX_CFLAGS"
AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
#error "Need GCC >= 3.4 for MMX intrinsics"
#endif
#include <mmintrin.h>
int main () {
    __m64 v = _mm_cvtsi32_si64 (1);
    return _mm_cvtsi64_si32 (v);
}], have_mmx_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS

AC_ARG_ENABLE(mmx,
   [AC_HELP_STRING([--disable-mmx],
                   [disable MMX fast paths])],
   [disable_mmx=yes], [disable_mmx=no])

if test $disable_mmx = yes ; then
   have_mmx_intrinsics=disabled
fi

if test $have_mmx_intrinsics = yes ; then
   AC_DEFINE(USE_MMX, 1, [use MMX compiler intrinsics])
else
   MMX_CFLAGS=
fi

AC_MSG_RESULT($have_mmx_intrinsics)

AM_CONDITIONAL(USE_MMX, test $have_mmx_intrinsics = yes)

dnl =======================================================

dnl GCC 4.2 when compiling with -msse will generate SSE instructions
dnl on its own.  This means anything compiled with -mss can only be
dnl run after a runtime check for SSE.  Unfortunately, since we still
dnl need to support MMX-but-not-SSE (such as the OLPC), this means we
dnl can only use SSE when compiling for x86-64 (where SSE is always
dnl supported).

have_sse_intrinsics=no
AC_MSG_CHECKING(whether to use SSE intrinsics)
xserver_save_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS -msse $MMX_CFLAGS"

AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
#error "Need GCC >= 3.4 for SSE intrinsics"
#endif
#if !defined(__amd64__) && !defined(__x86_64__)
#error "Need x86-64 for SSE"
#endif
#include <mmintrin.h>
#include <xmmintrin.h>
int main () {
    __m64 v = _mm_cvtsi32_si64 (1);
    v = _mm_shuffle_pi16 (v, _MM_SHUFFLE(3, 3, 3, 3));
    return _mm_cvtsi64_si32 (v);
}], have_sse_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS
AC_MSG_RESULT($have_sse_intrinsics)

if test $have_sse_intrinsics = yes ; then
   AC_DEFINE(USE_SSE, 1, [use SSE compiler intrinsics])
   MMX_CFLAGS="-msse $MMX_CFLAGS"
fi

AM_CONDITIONAL(USE_SSE, test $have_sse_intrinsics = yes)


dnl ===========================================================================
dnl Check for SSE2

SSE_CFLAGS="-mmmx -msse2 -Winline"

if test "x$GCC" = "xyes"; then
    SSE_CFLAGS="$SSE_CFLAGS --param inline-unit-growth=10000 --param large-function-growth=10000 --param  max-inline-insns-single=6000"
fi

have_sse2_intrinsics=no
AC_MSG_CHECKING(whether to use SSE2 intrinsics)
xserver_save_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS -msse2 $SSE_CFLAGS"

AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2))
#error "Need GCC >= 4.2 for SSE2 intrinsics"
#endif
#include <mmintrin.h>
#include <xmmintrin.h>
#include <emmintrin.h>
int main () {
    __m128i a, b, c;
	c = _mm_xor_si128 (a, b);
    return 0;
}], have_sse2_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS

AC_ARG_ENABLE(sse2,
   [AC_HELP_STRING([--disable-sse2],
                   [disable SSE2 fast paths])],
   [disable_sse2=yes], [disable_sse2=no])

if test $disable_sse2 = yes ; then
   have_sse2_intrinsics=disabled
fi

if test $have_sse2_intrinsics = yes ; then
   AC_DEFINE(USE_SSE2, 1, [use SSE2 compiler intrinsics])
fi

AC_MSG_RESULT($have_sse2_intrinsics)

AM_CONDITIONAL(USE_SSE2, test $have_sse2_intrinsics = yes)

dnl ========================================================
AC_SUBST(MMX_CFLAGS)
AC_SUBST(SSE_CFLAGS)

dnl Check for VMX/Altivec
if test -n "`$CC -v 2>&1 | grep version | grep Apple`"; then
    VMX_CFLAGS="-faltivec"
else
    VMX_CFLAGS="-maltivec -mabi=altivec"
fi

have_vmx_intrinsics=no
AC_MSG_CHECKING(whether to use VMX/Altivec intrinsics)
xserver_save_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $VMX_CFLAGS"
AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
#error "Need GCC >= 3.4 for sane altivec support"
#endif
#include <altivec.h>
int main () {
    vector unsigned int v = vec_splat_u32 (1);
    v = vec_sub (v, v);
    return 0;
}], have_vmx_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS

AC_ARG_ENABLE(vmx,
   [AC_HELP_STRING([--disable-vmx],
                   [disable VMX fast paths])],
   [disable_vmx=yes], [disable_vmx=no])

if test $disable_vmx = yes ; then
   have_vmx_intrinsics=disabled
fi

if test $have_vmx_intrinsics = yes ; then
   AC_DEFINE(USE_VMX, 1, [use VMX compiler intrinsics])
else
   VMX_CFLAGS=
fi

AC_MSG_RESULT($have_vmx_intrinsics)

AC_SUBST(VMX_CFLAGS)

AM_CONDITIONAL(USE_VMX, test $have_vmx_intrinsics = yes)

AC_ARG_ENABLE(gtk,
   [AC_HELP_STRING([--disable-gtk],
                   [disable tests using GTK+])],
   [disable_gtk=yes], [disable_gtk=no])

if test $disable_gtk = no ; then
   PKG_CHECK_MODULES(GTK, [gtk+-2.0], [HAVE_GTK=yes], [HAVE_GTK=no])
else
   HAVE_GTK=no
fi

AM_CONDITIONAL(HAVE_GTK, [test "x$HAVE_GTK" = xyes])

AC_SUBST(GTK_CFLAGS)
AC_SUBST(GTK_LIBS)
AC_SUBST(DEP_CFLAGS)
AC_SUBST(DEP_LIBS)
		  
AC_OUTPUT([pixman-1.pc
           Makefile
	   pixman/Makefile
	   pixman/pixman-version.h
	   test/Makefile])