remove unused sources

1 files changed, 0 insertions, 669 deletions

diff --git a/tiff/m4/acinclude.m4 b/tiff/m4/acinclude.m4
deleted file mode 100644
index a213cde..0000000
--- a/tiff/m4/acinclude.m4
+++ /dev/null
@@ -1,669 +0,0 @@
-dnl ---------------------------------------------------------------------------
-dnl Message output
-dnl ---------------------------------------------------------------------------
-AC_DEFUN([LOC_MSG],[echo "$1"])
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://www.gnu.org/software/ac-archive/vl_prog_cc_warnings.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis VL_PROG_CC_WARNINGS([ANSI])
-dnl
-dnl Enables a reasonable set of warnings for the C compiler.
-dnl Optionally, if the first argument is nonempty, turns on flags which
-dnl enforce and/or enable proper ANSI C if such are known with the
-dnl compiler used.
-dnl
-dnl Currently this macro knows about GCC, Solaris C compiler, Digital
-dnl Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C
-dnl compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos
-dnl 10.0.0.8) C compiler.
-dnl
-dnl @category C
-dnl @author Ville Laurikari <vl@iki.fi>
-dnl @version 2002-04-04
-dnl @license AllPermissive
-
-AC_DEFUN([VL_PROG_CC_WARNINGS], [
-  ansi=$1
-  if test -z "$ansi"; then
-    msg="for C compiler warning flags"
-  else
-    msg="for C compiler warning and ANSI conformance flags"
-  fi
-  AC_CACHE_CHECK($msg, vl_cv_prog_cc_warnings, [
-    if test -n "$CC"; then
-      cat > conftest.c <<EOF
-int main(int argc, char **argv) { return 0; }
-EOF
-
-      dnl GCC. -W option has been renamed in -wextra in latest gcc versions.
-      if test "$GCC" = "yes"; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-Wall -W"
-        else
-          vl_cv_prog_cc_warnings="-Wall -W -ansi -pedantic"
-        fi
-
-      dnl Most compilers print some kind of a version string with some command
-      dnl line options (often "-V").  The version string should be checked
-      dnl before doing a test compilation run with compiler-specific flags.
-      dnl This is because some compilers (like the Cray compiler) only
-      dnl produce a warning message for unknown flags instead of returning
-      dnl an error, resulting in a false positive.  Also, compilers may do
-      dnl erratic things when invoked with flags meant for a different
-      dnl compiler.
-
-      dnl Solaris C compiler
-      elif $CC -V 2>&1 | grep -i "WorkShop" > /dev/null 2>&1 &&
-           $CC -c -v -Xc conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-v"
-        else
-          vl_cv_prog_cc_warnings="-v -Xc"
-        fi
-
-      dnl Digital Unix C compiler
-      elif $CC -V 2>&1 | grep -i "Digital UNIX Compiler" > /dev/null 2>&1 &&
-           $CC -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-verbose -w0 -warnprotos"
-        else
-          vl_cv_prog_cc_warnings="-verbose -w0 -warnprotos -std1"
-        fi
-
-      dnl C for AIX Compiler
-      elif $CC 2>&1 | grep -i "C for AIX Compiler" > /dev/null 2>&1 &&
-           $CC -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"
-        else
-          vl_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi"
-        fi
-
-      dnl IRIX C compiler
-      elif $CC -version 2>&1 | grep -i "MIPSpro Compilers" > /dev/null 2>&1 &&
-           $CC -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-fullwarn"
-        else
-          vl_cv_prog_cc_warnings="-fullwarn -ansi -ansiE"
-        fi
-
-      dnl HP-UX C compiler
-      elif what $CC 2>&1 | grep -i "HP C Compiler" > /dev/null 2>&1 &&
-           $CC -c -Aa +w1 conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="+w1"
-        else
-          vl_cv_prog_cc_warnings="+w1 -Aa"
-        fi
-
-      dnl The NEC SX-5 (Super-UX 10) C compiler
-      elif $CC -V 2>&1 | grep "/SX" > /dev/null 2>&1 &&
-           $CC -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-pvctl[,]fullmsg"
-        else
-          vl_cv_prog_cc_warnings="-pvctl[,]fullmsg -Xc"
-        fi
-
-      dnl The Cray C compiler (Unicos)
-      elif $CC -V 2>&1 | grep -i "Cray" > /dev/null 2>&1 &&
-           $CC -c -h msglevel 2 conftest.c > /dev/null 2>&1 &&
-           test -f conftest.o; then
-        if test -z "$ansi"; then
-          vl_cv_prog_cc_warnings="-h msglevel 2"
-        else
-          vl_cv_prog_cc_warnings="-h msglevel 2 -h conform"
-        fi
-
-      fi
-      rm -f conftest.*
-    fi
-    if test -n "$vl_cv_prog_cc_warnings"; then
-      CFLAGS="$CFLAGS $vl_cv_prog_cc_warnings"
-    else
-      vl_cv_prog_cc_warnings="unknown"
-    fi
-  ])
-])dnl
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://autoconf-archive.cryp.to/ax_lang_compiler_ms.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis AX_LANG_COMPILER_MS
-dnl
-dnl Check whether the compiler for the current language is Microsoft.
-dnl
-dnl This macro is modeled after _AC_LANG_COMPILER_GNU in the GNU
-dnl Autoconf implementation.
-dnl
-dnl @category InstalledPackages
-dnl @author Braden McDaniel <braden@endoframe.com>
-dnl @version 2004-11-15
-dnl @license AllPermissive
-
-AC_DEFUN([AX_LANG_COMPILER_MS],
-[AC_CACHE_CHECK([whether we are using the Microsoft _AC_LANG compiler],
-                [ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms],
-[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef _MSC_VER
-       choke me
-#endif
-]])],
-                   [ax_compiler_ms=yes],
-                   [ax_compiler_ms=no])
-ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms=$ax_compiler_ms
-])])
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://www.gnu.org/software/ac-archive/ax_check_gl.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis AX_CHECK_GL
-dnl
-dnl Check for an OpenGL implementation. If GL is found, the required
-dnl compiler and linker flags are included in the output variables
-dnl "GL_CFLAGS" and "GL_LIBS", respectively. This macro adds the
-dnl configure option "--with-apple-opengl-framework", which users can
-dnl use to indicate that Apple's OpenGL framework should be used on Mac
-dnl OS X. If Apple's OpenGL framework is used, the symbol
-dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GL implementation
-dnl is found, "no_gl" is set to "yes".
-dnl
-dnl @category InstalledPackages
-dnl @author Braden McDaniel <braden@endoframe.com>
-dnl @version 2004-11-15
-dnl @license AllPermissive
-
-AC_DEFUN([AX_CHECK_GL],
-[AC_REQUIRE([AC_PATH_X])dnl
-AC_REQUIRE([ACX_PTHREAD])dnl
-
-#
-# There isn't a reliable way to know we should use the Apple OpenGL framework
-# without a configure option.  A Mac OS X user may have installed an
-# alternative GL implementation (e.g., Mesa), which may or may not depend on X.
-#
-AC_ARG_WITH([apple-opengl-framework],
-            [AC_HELP_STRING([--with-apple-opengl-framework],
-                            [use Apple OpenGL framework (Mac OS X only)])])
-if test "X$with_apple_opengl_framework" = "Xyes"; then
-  AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1],
-            [Use the Apple OpenGL framework.])
-  GL_LIBS="-framework OpenGL"
-else
-  AC_LANG_PUSH(C)
-
-  AX_LANG_COMPILER_MS
-  if test X$ax_compiler_ms = Xno; then
-    GL_CFLAGS="${PTHREAD_CFLAGS}"
-    GL_LIBS="${PTHREAD_LIBS} -lm"
-  fi
-
-  #
-  # Use x_includes and x_libraries if they have been set (presumably by
-  # AC_PATH_X).
-  #
-  if test "X$no_x" != "Xyes"; then
-    if test -n "$x_includes"; then
-      GL_CFLAGS="-I${x_includes} ${GL_CFLAGS}"
-    fi
-    if test -n "$x_libraries"; then
-      GL_LIBS="-L${x_libraries} -lX11 ${GL_LIBS}"
-    fi
-  fi
-
-  AC_CHECK_HEADERS([windows.h])
-
-  AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl],
-  [ax_cv_check_gl_libgl="no"
-  ax_save_CPPFLAGS="${CPPFLAGS}"
-  CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}"
-  ax_save_LIBS="${LIBS}"
-  LIBS=""
-  ax_check_libs="-lopengl32 -lGL"
-  for ax_lib in ${ax_check_libs}; do
-    if test X$ax_compiler_ms = Xyes; then
-      ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`
-    else
-      ax_try_lib="${ax_lib}"
-    fi
-    LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}"
-    AC_LINK_IFELSE(
-    [AC_LANG_PROGRAM([[
-# if HAVE_WINDOWS_H && defined(_WIN32)
-#   include <windows.h>
-# endif
-# include <GL/gl.h>]],
-                     [[glBegin(0)]])],
-    [ax_cv_check_gl_libgl="${ax_try_lib}"; break])
-  done
-  LIBS=${ax_save_LIBS}
-  CPPFLAGS=${ax_save_CPPFLAGS}])
-
-  if test "X${ax_cv_check_gl_libgl}" = "Xno"; then
-    no_gl="yes"
-    GL_CFLAGS=""
-    GL_LIBS=""
-  else
-    GL_LIBS="${ax_cv_check_gl_libgl} ${GL_LIBS}"
-  fi
-  AC_LANG_POP(C)
-fi
-
-AC_SUBST([GL_CFLAGS])
-AC_SUBST([GL_LIBS])
-])dnl
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://www.gnu.org/software/ac-archive/ax_check_glu.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis AX_CHECK_GLU
-dnl
-dnl Check for GLU. If GLU is found, the required preprocessor and
-dnl linker flags are included in the output variables "GLU_CFLAGS" and
-dnl "GLU_LIBS", respectively. This macro adds the configure option
-dnl "--with-apple-opengl-framework", which users can use to indicate
-dnl that Apple's OpenGL framework should be used on Mac OS X. If
-dnl Apple's OpenGL framework is used, the symbol
-dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GLU implementation
-dnl is found, "no_glu" is set to "yes".
-dnl
-dnl @category InstalledPackages
-dnl @author Braden McDaniel <braden@endoframe.com>
-dnl @version 2004-11-15
-dnl @license AllPermissive
-
-AC_DEFUN([AX_CHECK_GLU],
-[AC_REQUIRE([AX_CHECK_GL])dnl
-AC_REQUIRE([AC_PROG_CXX])dnl
-GLU_CFLAGS="${GL_CFLAGS}"
-if test "X${with_apple_opengl_framework}" != "Xyes"; then
-  AC_CACHE_CHECK([for OpenGL Utility library], [ax_cv_check_glu_libglu],
-  [ax_cv_check_glu_libglu="no"
-  ax_save_CPPFLAGS="${CPPFLAGS}"
-  CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}"
-  ax_save_LIBS="${LIBS}"
-  LIBS=""
-  ax_check_libs="-lglu32 -lGLU"
-  for ax_lib in ${ax_check_libs}; do
-    if test X$ax_compiler_ms = Xyes; then
-      ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`
-    else
-      ax_try_lib="${ax_lib}"
-    fi
-    LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}"
-    #
-    # libGLU typically links with libstdc++ on POSIX platforms. However,
-    # setting the language to C++ means that test program source is named
-    # "conftest.cc"; and Microsoft cl doesn't know what to do with such a
-    # file.
-    #
-    AC_LANG_PUSH([C++])
-    if test X$ax_compiler_ms = Xyes; then
-      AC_LANG_PUSH([C])
-    fi
-    AC_LINK_IFELSE(
-    [AC_LANG_PROGRAM([[
-# if HAVE_WINDOWS_H && defined(_WIN32)
-#   include <windows.h>
-# endif
-# include <GL/glu.h>]],
-                     [[gluBeginCurve(0)]])],
-    [ax_cv_check_glu_libglu="${ax_try_lib}"; break])
-    if test X$ax_compiler_ms = Xyes; then
-      AC_LANG_POP([C])
-    fi
-    AC_LANG_POP([C++])
-  done
-  LIBS=${ax_save_LIBS}
-  CPPFLAGS=${ax_save_CPPFLAGS}])
-  if test "X${ax_cv_check_glu_libglu}" = "Xno"; then
-    no_glu="yes"
-    GLU_CFLAGS=""
-    GLU_LIBS=""
-  else
-    GLU_LIBS="${ax_cv_check_glu_libglu} ${GL_LIBS}"
-  fi
-fi
-AC_SUBST([GLU_CFLAGS])
-AC_SUBST([GLU_LIBS])
-])
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://www.gnu.org/software/ac-archive/ax_check_glut.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis AX_CHECK_GLUT
-dnl
-dnl Check for GLUT. If GLUT is found, the required compiler and linker
-dnl flags are included in the output variables "GLUT_CFLAGS" and
-dnl "GLUT_LIBS", respectively. This macro adds the configure option
-dnl "--with-apple-opengl-framework", which users can use to indicate
-dnl that Apple's OpenGL framework should be used on Mac OS X. If
-dnl Apple's OpenGL framework is used, the symbol
-dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If GLUT is not found,
-dnl "no_glut" is set to "yes".
-dnl
-dnl @category InstalledPackages
-dnl @author Braden McDaniel <braden@endoframe.com>
-dnl @version 2004-11-15
-dnl @license AllPermissive
-
-AC_DEFUN([AX_CHECK_GLUT],
-[AC_REQUIRE([AX_CHECK_GLU])dnl
-AC_REQUIRE([AC_PATH_XTRA])dnl
-
-if test "X$with_apple_opengl_framework" = "Xyes"; then
-  GLUT_CFLAGS="${GLU_CFLAGS}"
-  GLUT_LIBS="-framework GLUT -lobjc ${GL_LIBS}"
-else
-  GLUT_CFLAGS=${GLU_CFLAGS}
-  GLUT_LIBS=${GLU_LIBS}
-
-  #
-  # If X is present, assume GLUT depends on it.
-  #
-  if test "X${no_x}" != "Xyes"; then
-    GLUT_LIBS="${X_PRE_LIBS} -lXmu -lXi ${X_EXTRA_LIBS} ${GLUT_LIBS}"
-  fi
-
-  AC_LANG_PUSH(C)
-
-  ax_save_CPPFLAGS="${CPPFLAGS}"
-  CPPFLAGS="${GLUT_CFLAGS} ${CPPFLAGS}"
-
-  AC_CACHE_CHECK([for GLUT library], [ax_cv_check_glut_libglut],
-  [ax_cv_check_glut_libglut="no"
-  ax_save_LIBS="${LIBS}"
-  LIBS=""
-  ax_check_libs="-lglut32 -lglut"
-  for ax_lib in ${ax_check_libs}; do
-    if test X$ax_compiler_ms = Xyes; then
-      ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`
-    else
-      ax_try_lib="${ax_lib}"
-    fi
-    LIBS="${ax_try_lib} ${GLUT_LIBS} ${ax_save_LIBS}"
-    AC_LINK_IFELSE(
-    [AC_LANG_PROGRAM([[
-# if HAVE_WINDOWS_H && defined(_WIN32)
-#   include <windows.h>
-# endif
-# include <GL/glut.h>]],
-                     [[glutMainLoop()]])],
-    [ax_cv_check_glut_libglut="${ax_try_lib}"; break])
-
-  done
-  LIBS=${ax_save_LIBS}
-  ])
-  CPPFLAGS="${ax_save_CPPFLAGS}"
-  AC_LANG_POP(C)
-
-  if test "X${ax_cv_check_glut_libglut}" = "Xno"; then
-    no_glut="yes"
-    GLUT_CFLAGS=""
-    GLUT_LIBS=""
-  else
-    GLUT_LIBS="${ax_cv_check_glut_libglut} ${GLUT_LIBS}"
-  fi
-fi
-
-AC_SUBST([GLUT_CFLAGS])
-AC_SUBST([GLUT_LIBS])
-])dnl
-
-dnl ---------------------------------------------------------------------------
-dnl Available from the GNU Autoconf Macro Archive at:
-dnl http://www.gnu.org/software/ac-archive/acx_pthread.html
-dnl ---------------------------------------------------------------------------
-
-dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
-dnl
-dnl This macro figures out how to build C programs using POSIX threads.
-dnl It sets the PTHREAD_LIBS output variable to the threads library and
-dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
-dnl C compiler flags that are needed. (The user can also force certain
-dnl compiler flags/libs to be tested by setting these environment
-dnl variables.)
-dnl
-dnl Also sets PTHREAD_CC to any special C compiler that is needed for
-dnl multi-threaded programs (defaults to the value of CC otherwise).
-dnl (This is necessary on AIX to use the special cc_r compiler alias.)
-dnl
-dnl NOTE: You are assumed to not only compile your program with these
-dnl flags, but also link it with them as well. e.g. you should link
-dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
-dnl $LIBS
-dnl
-dnl If you are only building threads programs, you may wish to use
-dnl these variables in your default LIBS, CFLAGS, and CC:
-dnl
-dnl        LIBS="$PTHREAD_LIBS $LIBS"
-dnl        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-dnl        CC="$PTHREAD_CC"
-dnl
-dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
-dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
-dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
-dnl
-dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
-dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
-dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
-dnl default action will define HAVE_PTHREAD.
-dnl
-dnl Please let the authors know if this macro fails on any platform, or
-dnl if you have any other suggestions or comments. This macro was based
-dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
-dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
-dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
-dnl We are also grateful for the helpful feedback of numerous users.
-dnl
-dnl @category InstalledPackages
-dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
-dnl @version 2005-01-14
-dnl @license GPLWithACException
-
-AC_DEFUN([ACX_PTHREAD], [
-AC_REQUIRE([AC_CANONICAL_HOST])
-AC_LANG_SAVE
-AC_LANG_C
-acx_pthread_ok=no
-
-# We used to check for pthread.h first, but this fails if pthread.h
-# requires special compiler flags (e.g. on True64 or Sequent).
-# It gets checked for in the link test anyway.
-
-# First of all, check if the user has set any of the PTHREAD_LIBS,
-# etcetera environment variables, and if threads linking works using
-# them:
-if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
-        save_CFLAGS="$CFLAGS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-        save_LIBS="$LIBS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
-        AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
-        AC_MSG_RESULT($acx_pthread_ok)
-        if test x"$acx_pthread_ok" = xno; then
-                PTHREAD_LIBS=""
-                PTHREAD_CFLAGS=""
-        fi
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
-fi
-
-# We must check for the threads library under a number of different
-# names; the ordering is very important because some systems
-# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
-# libraries is broken (non-POSIX).
-
-# Create a list of thread flags to try.  Items starting with a "-" are
-# C compiler flags, and other items are library names, except for "none"
-# which indicates that we try without any flags at all, and "pthread-config"
-# which is a program returning the flags for the Pth emulation library.
-
-acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
-
-# The ordering *is* (sometimes) important.  Some notes on the
-# individual items follow:
-
-# pthreads: AIX (must check this before -lpthread)
-# none: in case threads are in libc; should be tried before -Kthread and
-#       other compiler flags to prevent continual compiler warnings
-# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
-# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
-# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
-# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
-# -pthreads: Solaris/gcc
-# -mthreads: Mingw32/gcc, Lynx/gcc
-# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
-#      doesn't hurt to check since this sometimes defines pthreads too;
-#      also defines -D_REENTRANT)
-# pthread: Linux, etcetera
-# --thread-safe: KAI C++
-# pthread-config: use pthread-config program (for GNU Pth library)
-
-case "${host_cpu}-${host_os}" in
-        *solaris*)
-
-        # On Solaris (at least, for some versions), libc contains stubbed
-        # (non-functional) versions of the pthreads routines, so link-based
-        # tests will erroneously succeed.  (We need to link with -pthread or
-        # -lpthread.)  (The stubs are missing pthread_cleanup_push, or rather
-        # a function called by this macro, so we could check for that, but
-        # who knows whether they'll stub that too in a future libc.)  So,
-        # we'll just look for -pthreads and -lpthread first:
-
-        acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
-        ;;
-esac
-
-if test x"$acx_pthread_ok" = xno; then
-for flag in $acx_pthread_flags; do
-
-        case $flag in
-                none)
-                AC_MSG_CHECKING([whether pthreads work without any flags])
-                ;;
-
-                -*)
-                AC_MSG_CHECKING([whether pthreads work with $flag])
-                PTHREAD_CFLAGS="$flag"
-                ;;
-
-		pthread-config)
-		AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
-		if test x"$acx_pthread_config" = xno; then continue; fi
-		PTHREAD_CFLAGS="`pthread-config --cflags`"
-		PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
-		;;
-
-                *)
-                AC_MSG_CHECKING([for the pthreads library -l$flag])
-                PTHREAD_LIBS="-l$flag"
-                ;;
-        esac
-
-        save_LIBS="$LIBS"
-        save_CFLAGS="$CFLAGS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-
-        # Check for various functions.  We must include pthread.h,
-        # since some functions may be macros.  (On the Sequent, we
-        # need a special flag -Kthread to make this header compile.)
-        # We check for pthread_join because it is in -lpthread on IRIX
-        # while pthread_create is in libc.  We check for pthread_attr_init
-        # due to DEC craziness with -lpthreads.  We check for
-        # pthread_cleanup_push because it is one of the few pthread
-        # functions on Solaris that doesn't have a non-functional libc stub.
-        # We try pthread_create on general principles.
-        AC_TRY_LINK([#include <pthread.h>],
-                    [pthread_t th; pthread_join(th, 0);
-                     pthread_attr_init(0); pthread_cleanup_push(0, 0);
-                     pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
-                    [acx_pthread_ok=yes])
-
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
-
-        AC_MSG_RESULT($acx_pthread_ok)
-        if test "x$acx_pthread_ok" = xyes; then
-                break;
-        fi
-
-        PTHREAD_LIBS=""
-        PTHREAD_CFLAGS=""
-done
-fi
-
-# Various other checks:
-if test "x$acx_pthread_ok" = xyes; then
-        save_LIBS="$LIBS"
-        LIBS="$PTHREAD_LIBS $LIBS"
-        save_CFLAGS="$CFLAGS"
-        CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
-
-        # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
-	AC_MSG_CHECKING([for joinable pthread attribute])
-	attr_name=unknown
-	for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
-	    AC_TRY_LINK([#include <pthread.h>], [int attr=$attr;],
-                        [attr_name=$attr; break])
-	done
-        AC_MSG_RESULT($attr_name)
-        if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
-            AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
-                               [Define to necessary symbol if this constant
-                                uses a non-standard name on your system.])
-        fi
-
-        AC_MSG_CHECKING([if more special flags are required for pthreads])
-        flag=no
-        case "${host_cpu}-${host_os}" in
-            *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
-            *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
-        esac
-        AC_MSG_RESULT(${flag})
-        if test "x$flag" != xno; then
-            PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
-        fi
-
-        LIBS="$save_LIBS"
-        CFLAGS="$save_CFLAGS"
-
-        # More AIX lossage: must compile with cc_r
-        AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
-else
-        PTHREAD_CC="$CC"
-fi
-
-AC_SUBST(PTHREAD_LIBS)
-AC_SUBST(PTHREAD_CFLAGS)
-AC_SUBST(PTHREAD_CC)
-
-# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test x"$acx_pthread_ok" = xyes; then
-        ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
-        :
-else
-        acx_pthread_ok=no
-        $2
-fi
-AC_LANG_RESTORE
-])dnl ACX_PTHREAD