# Process this file with autoconf to produce a configure script.
AC_INIT(Valgrind, 3.0.0.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 (must be specified!)]),
#
AC_ARG_WITH(vex, 
    [  --with-vex=/path/to/vex/dir    Vex directory (must be specified!)],
[
    AC_CHECK_FILE($withval/pub/libvex.h,
        [VEX_DIR=$withval],
        [AC_MSG_ERROR([Directory '$withval' does not exist, or does not contain Vex])])
],
[
    AC_MSG_ERROR([You must specify --with-vex=/path/to/vex/dir])
])
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)
])

# This variable will collect the individual suppression files
# depending on the results of autoconf

DEFAULT_SUPP=""


# 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 arm ppc32 x86"
AC_SUBST(KICKSTART_BASE)
AC_SUBST(ARCH_CORE_AM_CFLAGS)
AC_SUBST(ARCH_TOOL_AM_CFLAGS)
AC_SUBST(ARCH_CORE_AM_CCASFLAGS)

case "${host_cpu}" in
     i?86) 
	AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="x86"
        KICKSTART_BASE="0xb0000000"
        ARCH_CORE_AM_CFLAGS="@FLAG_M32@ @PREFERRED_STACK_BOUNDARY@"
        ARCH_TOOL_AM_CFLAGS="@FLAG_M32@ @PREFERRED_STACK_BOUNDARY@"
        ARCH_CORE_AM_CCASFLAGS="@FLAG_M32@"
        ;;

     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.
        KICKSTART_BASE="0x70000000"
        ARCH_CORE_AM_CFLAGS="-m64 -fomit-frame-pointer @PREFERRED_STACK_BOUNDARY@" 
        # XXX: need to use -fpic, otherwise when linking tools I get this error
        # message:
        #   relocation R_X86_64_32 can not be used when making a shared object;
        #   recompile with -fPIC
        #
        # I don't understand...  --njn
        ARCH_TOOL_AM_CFLAGS="-m64 -fomit-frame-pointer @PREFERRED_STACK_BOUNDARY@ -fpic"
        ARCH_CORE_AM_CCASFLAGS="-m64"
        ;;

     arm*) 
	AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="arm"
        KICKSTART_BASE="0xb0000000"
        ARCH_CORE_AM_CFLAGS="-fomit-frame-pointer @PREFERRED_STACK_BOUNDARY@"
        ARCH_TOOL_AM_CFLAGS="-fomit-frame-pointer @PREFERRED_STACK_BOUNDARY@"
        ARCH_CORE_AM_CCASFLAGS=""
        ;;

     powerpc*)
        AC_MSG_RESULT([ok (${host_cpu})])
        VG_ARCH="ppc32"
        KICKSTART_BASE="0x70000000"
        ARCH_CORE_AM_CFLAGS=""
        ARCH_TOOL_AM_CFLAGS="-fpic"
        ARCH_CORE_AM_CCASFLAGS="-Wa,-maltivec"
        ;;

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

AC_MSG_CHECKING([for a supported OS])
AC_SUBST(VG_OS)
AC_SUBST(VG_OS_ALL)
VG_OS_ALL="linux"

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

AC_MSG_CHECKING([for a supported CPU/OS combination])
AC_SUBST(VG_PLATFORM)
AC_SUBST(VG_PLATFORM_ALL)
VG_PLATFORM_ALL="amd64-linux arm-linux ppc32-linux x86-linux"

VG_PLATFORM="$VG_ARCH-$VG_OS"

case $VG_PLATFORM in
    x86-linux|amd64-linux|arm-linux|ppc32-linux)
        AC_MSG_RESULT([ok (${host_cpu}-${host_os})])
        ;;

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

AC_SUBST(DEFAULT_SUPP)

glibc=""

AC_EGREP_CPP([GLIBC_21], [
#include <features.h>
#ifdef __GNU_LIBRARY__
 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ == 1)
  GLIBC_21
 #endif
#endif
],
glibc="2.1")

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_MSG_CHECKING([the glibc version])

case "${glibc}" in
     2.1)
	AC_MSG_RESULT(2.1 family)
	AC_DEFINE([GLIBC_2_1], 1, [Define to 1 if you're using glibc 2.1.x])
	DEFAULT_SUPP="${DEFAULT_SUPP} glibc-2.1.supp"
	;;

     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="${DEFAULT_SUPP} glibc-2.2.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="${DEFAULT_SUPP} glibc-2.3.supp"
	;;

     *)
	AC_MSG_RESULT(unsupported version)
	AC_MSG_ERROR([Valgrind requires the glibc version 2.1, 2.2 or 2.3])
	;;
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 "${no_x}" != 'yes' ; then
   DEFAULT_SUPP="${DEFAULT_SUPP} xfree-4.supp"
   DEFAULT_SUPP="${DEFAULT_SUPP} xfree-3.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 -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


# 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


# Check for PIE support in the compiler and linker
AC_SUBST(PIE_AM_CFLAGS)
AC_CACHE_CHECK([for PIE support], vg_cv_pie,
	       [AC_ARG_ENABLE(pie, [  --enable-pie            platform supports PIE linking],
		[vg_cv_pie=$enableval],
               	[safe_CFLAGS=$CFLAGS
                 CFLAGS="$CFLAGS -fpie"
                 safe_LDFLAGS=$LDFLAGS
                 LDFLAGS="$LDFLAGS -pie"
                 AC_TRY_LINK([int foo;],
                             [],
                             [vg_cv_pie=yes],
                             [vg_cv_pie=no])
                 CFLAGS=$safe_CFLAGS
                 LDFLAGS=$safe_LDFLAGS])])
if test "$vg_cv_pie" = yes; then
AC_DEFINE([HAVE_PIE], 1, [can create position-independent executables])
PIE_AM_CFLAGS="-fpie"
fi
AM_CONDITIONAL(USE_PIE, test "$vg_cv_pie" = "yes")


# 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/xml/Makefile
   tests/Makefile 
   tests/vg_regtest 
   tests/unused/Makefile 
   include/Makefile 
   auxprogs/Makefile
   coregrind/Makefile 
   coregrind/m_aspacemgr/Makefile 
   coregrind/m_debuginfo/Makefile 
   coregrind/m_demangle/Makefile 
   coregrind/m_dispatch/Makefile 
   coregrind/m_replacemalloc/Makefile 
   coregrind/m_scheduler/Makefile 
   coregrind/m_sigframe/Makefile 
   coregrind/m_syswrap/Makefile 
   addrcheck/Makefile
   addrcheck/tests/Makefile
   addrcheck/docs/Makefile
   memcheck/Makefile
   memcheck/tests/Makefile
   memcheck/tests/amd64/Makefile
   memcheck/tests/arm/Makefile
   memcheck/tests/ppc32/Makefile
   memcheck/tests/x86/Makefile
   memcheck/docs/Makefile
   cachegrind/Makefile
   cachegrind/tests/Makefile
   cachegrind/tests/amd64/Makefile
   cachegrind/tests/arm/Makefile
   cachegrind/tests/ppc32/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
   corecheck/Makefile
   corecheck/tests/Makefile
   corecheck/docs/Makefile
   lackey/Makefile
   lackey/tests/Makefile
   lackey/docs/Makefile
   none/Makefile
   none/tests/Makefile
   none/tests/amd64/Makefile
   none/tests/arm/Makefile
   none/tests/ppc32/Makefile
   none/tests/x86/Makefile
   none/docs/Makefile
) 

cat<<EOF

Using the following suppressions by default: 

      ${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