configure.in   [plain text]

# Process this file with autoconf to produce a configure script, like so:
# aclocal && autoconf && autoheader && automake

AC_PREREQ(2.13)
AC_INIT(mf-runtime.c)
AC_CANONICAL_SYSTEM
AM_INIT_AUTOMAKE(libmudflap, 1.0)

AC_SUBST(PACKAGE)
# For libtool versioning info, format is CURRENT:REVISION:AGE
libtool_VERSION=1:0:0
AC_SUBST(libtool_VERSION)

dnl AM_ENABLE_MULTILIB
AM_MAINTAINER_MODE
AC_EXEEXT

target_alias=${target_alias-$target}
AC_SUBST(target_alias)

AM_CONFIG_HEADER(config.h)

AC_LANG_C
AC_PROG_CC
if test "x$GCC" != "xyes"; then
  AC_MSG_ERROR([libmudflap must be built with GCC])
fi
AC_PROG_CPP

# Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in
# symbol interposition.  We disable shared libraries for these.
AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available])
AC_TRY_COMPILE([
#define _GNU_SOURCE
#include <dlfcn.h>
],
[void *foo = dlsym (RTLD_NEXT, "exit");],
[AC_MSG_RESULT(yes)],
[AC_MSG_RESULT(no)
enable_shared=no])

AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h)
AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)

dnl Check for 64-bit stdio calls related to Large File Support
AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64)

AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0])
if test $mf_have_semun = 1
then
  AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h])
fi


AC_MSG_CHECKING([for socklen_t in sys/socket.h])
AC_TRY_COMPILE([#define _POSIX_PII_SOCKET
#include <sys/types.h> 
#include <sys/socket.h>], [socklen_t x = 5;],
  [AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.])
   AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)])

AC_LIBTOOL_DLOPEN
AM_PROG_LIBTOOL
AC_SUBST(enable_shared)
AC_SUBST(enable_static)

AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0])
AC_SUBST(MF_HAVE_STDINT_H)
if test $MF_HAVE_STDINT_H = 1
then
   MF_HAVE_UINTPTR_T=1
else
   AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;],
   	[MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0])
fi
AC_SUBST(MF_HAVE_UINTPTR_T)

if test ! -d pth
then
  # libmudflapth objects are built in this subdirectory
  mkdir pth
fi

pthread_create_version='""'
AC_CHECK_HEADER(pthread.h,[
AC_DEFINE_UNQUOTED(HAVE_PTHREAD_H, 1, [define if you have <pthread.h>])
ac_have_pthread_h=yes
],[
ac_have_pthread_h=
])
AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$ac_have_pthread_h" != ""])

AC_CHECK_LIB(dl, dlsym)

if test "x$enable_shared" = "xyes" && test "x$ac_have_pthread_h" != ""; then
  # NB: don't check for -lpthread here, because then it would be
  # added to LIBS.  For the thread-unaware libmudflap.la, we don't
  # want it there.

  # glibc-related hacks.  dlsym() may pick the wrong version of
  # interposed functions like pthread_create on modern glibc.
  # We need to find the proper symbol version string, and use
  # the nonstandard dlvsym().
  AC_CHECK_FUNCS(dlvsym)
  AC_CHECK_TOOL(NM, nm)
  if test "x$ac_cv_have_dlvsym" != ""; then
    # Try compiling a simple pthreads program.  Find the shared libraries it
    # ends up with.  Then use "nm" on those libraries to extract the
    # default symbol versioning suffix ("@@"), if any.  But that's tricky.
    # Rather, run nm on the resulting executable.  Unfortunately, autoconf
    # doesn't appear to have a macro that builds a test executable for
    # subsequent analysis ... so we do it by hand here. 
    cat >> conftest.c << EOF
#include <pthread.h>
int main () { void *p = (void *) & pthread_create; return (int) p; }
EOF
    oldLIBS="$LIBS"
    LIBS="$LIBS -lpthread"
    pthread_create_version="\"\""
    AC_MSG_CHECKING(pthread_create symbol version)
    if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then
      version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'`
      if test "x$version" != "x"; then
        pthread_create_version="\"$version\""
      fi
    fi
    AC_MSG_RESULT($pthread_create_version)
    LIBS="$oldLIBS"
  fi
fi
AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version])   


AC_OUTPUT([Makefile testsuite/Makefile mf-runtime.h])