##------------------------------------------------------------##
# 
# The multiple-architecture stuff in this file is pretty
# cryptic.  Read docs/internals/multiple-architectures.txt
# for at least a partial explanation of what is going on.
#
##------------------------------------------------------------##

# Process this file with autoconf to produce a configure script.
AC_INIT(Valgrind, 3.2.0.SVN, valgrind-users@lists.sourceforge.net)
AC_CONFIG_SRCDIR(coregrind/m_main.c)
AM_CONFIG_HEADER(config.h)
AM_INIT_AUTOMAKE

AM_MAINTAINER_MODE

# Where is VEX ?
# Nb: For the 2nd arg, the help string, AS_HELP_STRING is the proper way, but
#     older autoconfs don't support it... here's what it would say:
#
#    AS_HELP_STRING([--with-vex], [Vex directory]),
#
AC_ARG_WITH(vex, 
    [  --with-vex=/path/to/vex/dir    Vex directory],
[
    AC_CHECK_FILE($withval/pub/libvex.h,
        [VEX_DIR=$withval],
        [AC_MSG_ERROR([Directory '$withval' does not exist, or does not contain Vex])])
],
[
    VEX_DIR='$(top_srcdir)/VEX'
])
AC_SUBST(VEX_DIR)

# "make distcheck" first builds a tarball, then extracts it.
# Then it creates a build directory different from the extracted sources
# (called _build), and issues
#
#   ../configure $(DISTCHECK_CONFIGURE_FLAGS)
#
# and then builds, runs "make check", installs using DESTDIR, runs make
# installcheck, uninstalls, checks whether the installed base is empty
# again, then does yet another "make dist" and compares the resulting
# tarball with the one it started off with for identical content.  Then it
# tests "make distclean" for no leftover files.  
#
# So this line means:  when doing "make dist", use the same --with-vex value
# that you used when running configure to configure this tree in the first
# place.
AC_SUBST([DISTCHECK_CONFIGURE_FLAGS], [--with-vex=$VEX_DIR])

# Checks for programs.
CFLAGS="-Wno-long-long"

AC_PROG_LN_S
AC_PROG_CC
##AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_RANLIB

# Check for the compiler support
if test "${GCC}" != "yes" ; then
   AC_MSG_ERROR([Valgrind relies on GCC to be compiled])
fi

# figure out where perl lives
AC_PATH_PROG(PERL, perl)

# figure out where gdb lives
AC_PATH_PROG(GDB, gdb)
AC_DEFINE_UNQUOTED(GDB_PATH, "$GDB", [path to GDB])

# some older automake's don't have it so try something on our own
ifdef([AM_PROG_AS],[AM_PROG_AS],
[
AS="${CC}"
AC_SUBST(AS)

ASFLAGS=""
AC_SUBST(ASFLAGS)
])


# We don't want gcc < 3.0
AC_MSG_CHECKING([for a supported version of gcc])

gcc_version=`${CC} --version | head -n 1`

case "${gcc_version}" in
     gcc-2.7.*)
	AC_MSG_RESULT([no (${gcc_version})])
	AC_MSG_ERROR([please use a recent (>= gcc-3.0) version of gcc])
	;;
     gcc-2.8.*)
	AC_MSG_RESULT([no (${gcc_version})])
	AC_MSG_ERROR([please use a recent (>= gcc-3.0) version of gcc])
	;;
     gcc-2.9*)
	AC_MSG_RESULT([no (${gcc_version})])
	AC_MSG_ERROR([please use a recent (>= gcc-3.0) version of gcc])
	;;

     *)
	AC_MSG_RESULT([ok (${gcc_version})])
	;;
esac


# Checks for the platform
AC_CANONICAL_HOST

AC_MSG_CHECKING([for a supported CPU])
AC_SUBST(VG_ARCH)

AC_SUBST(VG_ARCH_ALL)
VG_ARCH_ALL="amd64 ppc32 ppc64 x86"

AC_SUBST(VALT_LOAD_ADDRESS)

case "${host_cpu}" in
     i?86) 
	AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="x86"
        valt_load_address_normal="0xb0000000"
        valt_load_address_inner="0xa0000000"
        ;;

     x86_64) 
        AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="amd64"
        # XXX: relocations under amd64's "small model" are 32-bit signed
        # quantities; therefore going above 0x7fffffff doesn't work... this is
        # a problem.
        valt_load_address_normal="0x70000000"
        valt_load_address_inner="0x60000000"
        ;;

     powerpc64)
        AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="ppc64"
        valt_load_address_normal="0x70000000"
        valt_load_address_inner="0x60000000"
        ;;

     powerpc)
        AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="ppc32"
        valt_load_address_normal="0x70000000"
        valt_load_address_inner="0x60000000"
        ;;

     *) 
	AC_MSG_RESULT([no (${host_cpu})])
	AC_MSG_ERROR([Unsupported host architecture. Sorry])
	;;
esac

# Check if this should be built as an inner Valgrind, to be run within
# another Valgrind.  Choose the load address accordingly.
AC_CACHE_CHECK([enable use as an inner Valgrind], vg_cv_inner,
	       [AC_ARG_ENABLE(inner, [  --enable-inner          enables self-hosting],
		[vg_cv_inner=$enableval],
               	[vg_cv_inner=no])])
if test "$vg_cv_inner" = yes; then
    AC_DEFINE([ENABLE_INNER], 1, [configured to run as an inner Valgrind])
    VALT_LOAD_ADDRESS=$valt_load_address_inner
else
    VALT_LOAD_ADDRESS=$valt_load_address_normal
fi

AC_MSG_CHECKING([for a supported OS])
AC_SUBST(VG_OS)

case "${host_os}" in
     *linux*)
	AC_MSG_RESULT([ok (${host_os})])
        VG_OS="linux"

        # Ok, this is linux. Check the kernel version
        AC_MSG_CHECKING([for the kernel version])

        kernel=`uname -r`

        case "${kernel}" in
             2.6.*) 
        	    AC_MSG_RESULT([2.6 family (${kernel})])
        	    AC_DEFINE([KERNEL_2_6], 1, [Define to 1 if you're using Linux 2.6.x])
        	    ;;

             2.4.*) 
        	    AC_MSG_RESULT([2.4 family (${kernel})])
        	    AC_DEFINE([KERNEL_2_4], 1, [Define to 1 if you're using Linux 2.4.x])
        	    ;;

             *) 
        	    AC_MSG_RESULT([unsupported (${kernel})])
        	    AC_MSG_ERROR([Valgrind works on kernels 2.4, 2.6])
        	    ;;
        esac

        ;;

     *freebsd*)
        AC_MSG_RESULT([ok (${host_os})])
        VG_OS="freebsd"
        ;;

     *) 
	AC_MSG_RESULT([no (${host_os})])
	AC_MSG_ERROR([Valgrind is operating system specific. Sorry. Please consider doing a port.])
	;;
esac


# Establish VG_PLATFORM_PRI.  This is the primary build target.  The
# entire system, including regression and performance tests, will be
# built for this target.
#
# Also establish VG_PLATFORM_SEC, the secondary build target, if
# possible.  The system will also be built for this target, but not
# the regression or performance tests.
#
AC_MSG_CHECKING([for a supported CPU/OS combination])

AC_SUBST(VG_PLATFORM_PRI)
AC_SUBST(VG_PLATFORM_SEC)

case "$VG_ARCH-$VG_OS" in
     x86-linux)
	VG_PLATFORM_PRI="X86_LINUX"
	VG_PLATFORM_SEC=""
        AC_MSG_RESULT([ok (${host_cpu}-${host_os})])
	;;
     amd64-linux)
	VG_PLATFORM_PRI="AMD64_LINUX"
	VG_PLATFORM_SEC="X86_LINUX"
        AC_MSG_RESULT([ok (${host_cpu}-${host_os})])
	;;
     ppc32-linux)
	VG_PLATFORM_PRI="PPC32_LINUX"
	VG_PLATFORM_SEC=""
        AC_MSG_RESULT([ok (${host_cpu}-${host_os})])
	;;
     ppc64-linux)
	VG_PLATFORM_PRI="PPC64_LINUX"
	VG_PLATFORM_SEC="PPC32_LINUX"
        AC_MSG_RESULT([ok (${host_cpu}-${host_os})])
	;;
    *)
	VG_PLATFORM_PRI="unknown"
	VG_PLATFORM_SEC="unknown"
        AC_MSG_RESULT([no (${host_cpu}-${host_os})])
        AC_MSG_ERROR([Valgrind is platform specific. Sorry. Please consider doing a port.])
        ;;
esac

# Set up VG_<platform>.  Either one or two of these become defined.
#
AM_CONDITIONAL(VG_X86_LINUX,   
               test x$VG_PLATFORM_PRI = xX86_LINUX \
                 -o x$VG_PLATFORM_SEC = xX86_LINUX)
AM_CONDITIONAL(VG_AMD64_LINUX, 
               test x$VG_PLATFORM_PRI = xAMD64_LINUX)
AM_CONDITIONAL(VG_PPC32_LINUX, 
               test x$VG_PLATFORM_PRI = xPPC32_LINUX \ 
                 -o x$VG_PLATFORM_SEC = xPPC32_LINUX)
AM_CONDITIONAL(VG_PPC64_LINUX, 
               test x$VG_PLATFORM_PRI = xPPC64_LINUX)


# This variable will collect the individual suppression files
# depending on the results of autoconf
DEFAULT_SUPP=""
AC_SUBST(DEFAULT_SUPP)


glibc=""

AC_EGREP_CPP([GLIBC_22], [
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2)
  GLIBC_22
 #endif
#endif
],
glibc="2.2")

AC_EGREP_CPP([GLIBC_23], [
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 3)
  GLIBC_23
 #endif
#endif
],
glibc="2.3")

AC_EGREP_CPP([GLIBC_24], [
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 4)
  GLIBC_24
 #endif
#endif
],
glibc="2.4")

AC_MSG_CHECKING([the glibc version])

case "${glibc}" in
     2.2)
	AC_MSG_RESULT(2.2 family)
	AC_DEFINE([GLIBC_2_2], 1, [Define to 1 if you're using glibc 2.2.x])
	DEFAULT_SUPP="glibc-2.2.supp ${DEFAULT_SUPP}"
	;;

     2.3)
	AC_MSG_RESULT(2.3 family)
	AC_DEFINE([GLIBC_2_3], 1, [Define to 1 if you're using glibc 2.3.x])
	DEFAULT_SUPP="glibc-2.3.supp ${DEFAULT_SUPP}"
	;;

     2.4)
	AC_MSG_RESULT(2.4 family)
	AC_DEFINE([GLIBC_2_4], 1, [Define to 1 if you're using glibc 2.4.x])
	DEFAULT_SUPP="glibc-2.4.supp ${DEFAULT_SUPP}"
	;;

     *)
	AC_MSG_RESULT(unsupported version)
	AC_MSG_ERROR([Valgrind requires glibc version 2.2, 2.3 or 2.4])
	;;
esac


# We don't know how to detect the X client library version
# (detecting the server version is easy, bu no help).  So we
# just use a hack: always include the suppressions for both
# versions 3 and 4.
AC_PATH_X
if test "${no_x}" != 'yes' ; then
   DEFAULT_SUPP="xfree-4.supp ${DEFAULT_SUPP}"
   DEFAULT_SUPP="xfree-3.supp ${DEFAULT_SUPP}"
fi


# does this compiler support -m32 ?
AC_MSG_CHECKING([if gcc accepts -m32])

safe_CFLAGS=$CFLAGS
CFLAGS="-m32"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
FLAG_M32="-m32"
AC_MSG_RESULT([yes])
], [
FLAG_M32=""
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

AC_SUBST(FLAG_M32)


# does this compiler support -m64 ?
AC_MSG_CHECKING([if gcc accepts -m64])

safe_CFLAGS=$CFLAGS
CFLAGS="-m64"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
FLAG_M64="-m64"
AC_MSG_RESULT([yes])
], [
FLAG_M64=""
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

AC_SUBST(FLAG_M64)


# does this compiler support -mmmx ?
AC_MSG_CHECKING([if gcc accepts -mmmx])

safe_CFLAGS=$CFLAGS
CFLAGS="-mmmx"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
FLAG_MMMX="-mmmx"
AC_MSG_RESULT([yes])
], [
FLAG_MMMX=""
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

AC_SUBST(FLAG_MMMX)


# does this compiler support -msse ?
AC_MSG_CHECKING([if gcc accepts -msse])

safe_CFLAGS=$CFLAGS
CFLAGS="-msse"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
FLAG_MSSE="-msse"
AC_MSG_RESULT([yes])
], [
FLAG_MSSE=""
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

AC_SUBST(FLAG_MSSE)


# does this compiler support -mpreferred-stack-boundary=2 ?
AC_MSG_CHECKING([if gcc accepts -mpreferred-stack-boundary])

safe_CFLAGS=$CFLAGS
CFLAGS="-mpreferred-stack-boundary=2"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
PREFERRED_STACK_BOUNDARY="-mpreferred-stack-boundary=2"
AC_MSG_RESULT([yes])
], [
PREFERRED_STACK_BOUNDARY=""
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

AC_SUBST(PREFERRED_STACK_BOUNDARY)


# does this compiler support -Wno-pointer-sign ?
AC_MSG_CHECKING([if gcc accepts -Wno-pointer-sign ])

safe_CFLAGS=$CFLAGS
CFLAGS="-Wno-pointer-sign"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
no_pointer_sign=yes
AC_MSG_RESULT([yes])
], [
no_pointer_sign=no
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

if test x$no_pointer_sign = xyes; then
  CFLAGS="$CFLAGS -Wno-pointer-sign"
fi


# does this compiler support -Wdeclaration-after-statement ?
AC_MSG_CHECKING([if gcc accepts -Wdeclaration-after-statement ])

safe_CFLAGS=$CFLAGS
CFLAGS="-Wdeclaration-after-statement"

AC_TRY_COMPILE(, [
int main () { return 0 ; }
],
[
declaration_after_statement=yes
AC_MSG_RESULT([yes])
], [
declaration_after_statement=no
AC_MSG_RESULT([no])
])
CFLAGS=$safe_CFLAGS

if test x$declaration_after_statement = xyes; then
  CFLAGS="$CFLAGS -Wdeclaration-after-statement"
fi

# does this compiler support __builtin_expect?
AC_MSG_CHECKING([if gcc supports __builtin_expect])
 
AC_TRY_LINK(, [
return __builtin_expect(1, 1) ? 1 : 0
],
[
ac_have_builtin_expect=yes
AC_MSG_RESULT([yes])
], [
ac_have_builtin_expect=no
AC_MSG_RESULT([no])
])
if test x$ac_have_builtin_expect = xyes ; then
  AC_DEFINE(HAVE_BUILTIN_EXPECT, 1, [Define to 1 if gcc supports __builtin_expect.])
fi


# Check for TLS support in the compiler and linker
AC_CACHE_CHECK([for TLS support], vg_cv_tls,
	       [AC_ARG_ENABLE(tls, [  --enable-tls            platform supports TLS],
		[vg_cv_tls=$enableval],
               	[AC_RUN_IFELSE([AC_LANG_PROGRAM([[static __thread int foo;]],
                                                [[return foo;]])],
                               [vg_cv_tls=yes],
                               [vg_cv_tls=no])])])

if test "$vg_cv_tls" = yes; then
AC_DEFINE([HAVE_TLS], 1, [can use __thread to define thread-local variables])
fi


# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([sys/endian.h endian.h mqueue.h])


# Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_UID_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_HEADER_TIME


# Checks for library functions.
AC_FUNC_MEMCMP
AC_FUNC_MMAP
AC_TYPE_SIGNAL

AC_CHECK_FUNCS([floor memchr memset mkdir strchr strdup strpbrk strrchr strstr semtimedop])

AC_OUTPUT(
   Makefile 
   valgrind.spec
   valgrind.pc
   docs/Makefile 
   docs/lib/Makefile
   docs/images/Makefile
   docs/internals/Makefile
   docs/xml/Makefile
   tests/Makefile 
   tests/vg_regtest 
   perf/Makefile 
   perf/vg_perf
   include/Makefile 
   auxprogs/Makefile
   coregrind/Makefile 
   addrcheck/Makefile
   addrcheck/tests/Makefile
   addrcheck/docs/Makefile
   memcheck/Makefile
   memcheck/tests/Makefile
   memcheck/tests/amd64/Makefile
   memcheck/tests/ppc32/Makefile
   memcheck/tests/ppc64/Makefile
   memcheck/tests/x86/Makefile
   memcheck/docs/Makefile
   cachegrind/Makefile
   cachegrind/tests/Makefile
   cachegrind/tests/amd64/Makefile
   cachegrind/tests/ppc32/Makefile
   cachegrind/tests/ppc64/Makefile
   cachegrind/tests/x86/Makefile
   cachegrind/docs/Makefile
   cachegrind/cg_annotate
   helgrind/Makefile
   helgrind/tests/Makefile
   helgrind/docs/Makefile
   massif/Makefile
   massif/hp2ps/Makefile
   massif/tests/Makefile
   massif/docs/Makefile
   lackey/Makefile
   lackey/tests/Makefile
   lackey/docs/Makefile
   none/Makefile
   none/tests/Makefile
   none/tests/amd64/Makefile
   none/tests/ppc32/Makefile
   none/tests/ppc64/Makefile
   none/tests/x86/Makefile
   none/docs/Makefile
) 

cat<<EOF

   Primary build target: ${VG_PLATFORM_PRI}
       Secondary target: ${VG_PLATFORM_SEC}
     Default supp files: ${DEFAULT_SUPP}

EOF

cat<<EOF > default.supp
# This is a generated file, composed of the following suppression rules:
#
#      ${DEFAULT_SUPP}
#

EOF

for file in ${DEFAULT_SUPP} ; do
    cat ${srcdir}/$file >> default.supp
done