xc-lt-iface.m4: provide XC_LIBTOOL macro

diff --git a/m4/xc-lt-iface.m4 b/m4/xc-lt-iface.m4
new file mode 100644 (file)
index 0000000..0b90d5f
--- /dev/null
+++ b/m4/xc-lt-iface.m4
@@ -0,0 +1,465 @@
+#---------------------------------------------------------------------------
+#
+# xc-lt-iface.m4
+#
+# Copyright (c) 2013 Daniel Stenberg <daniel@haxx.se>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+#---------------------------------------------------------------------------
+
+# serial 1
+
+
+dnl _XC_LIBTOOL_PREAMBLE
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks some configure script options related with
+dnl libtool and customizes its default behavior before
+dnl libtool code is actually used in script.
+
+m4_define([_XC_LIBTOOL_PREAMBLE],
+[dnl
+# ------------------------------------ #
+#  Determine libtool default behavior  #
+# ------------------------------------ #
+
+#
+# Default behavior is to enable shared and static libraries on systems
+# where libtool knows how to build both library versions, and does not
+# require separate configuration and build runs for each flavor.
+#
+
+xc_lt_want_enable_shared='yes'
+xc_lt_want_enable_static='yes'
+
+#
+# User may have disabled shared or static libraries.
+#
+case "x$enable_shared" in @%:@ (
+  xno)
+    xc_lt_want_enable_shared='no'
+    ;;
+esac
+case "x$enable_static" in @%:@ (
+  xno)
+    xc_lt_want_enable_static='no'
+    ;;
+esac
+if test "x$xc_lt_want_enable_shared" = 'xno' &&
+  test "x$xc_lt_want_enable_static" = 'xno'; then
+  AC_MSG_ERROR([can not disable shared and static libraries simultaneously])
+fi
+
+#
+# Default behavior on systems that require independent configuration
+# and build runs for shared and static is to enable shared libraries
+# and disable static ones. On these systems option '--disable-shared'
+# must be used in order to build a proper static library.
+#
+
+if test "x$xc_lt_want_enable_shared" = 'xyes' &&
+  test "x$xc_lt_want_enable_static" = 'xyes'; then
+  case $host_os in @%:@ (
+    mingw* | pw32* | cegcc* | os2* | aix*)
+      xc_lt_want_enable_static='no'
+      ;;
+  esac
+fi
+
+#
+# Make libtool aware of current shared and static library preferences
+# taking in account that, depending on host characteristics, libtool
+# may modify these option preferences later in this configure script.
+#
+
+enable_shared=$xc_lt_want_enable_shared
+enable_static=$xc_lt_want_enable_static
+
+#
+# Default behavior is to build PIC objects for shared libraries and
+# non-PIC objects for static libraries.
+#
+
+xc_lt_want_with_pic='default'
+
+#
+# User may have specified PIC preference.
+#
+
+case "x$with_pic" in @%:@ ((
+  xno)
+    xc_lt_want_with_pic='no'
+    ;;
+  xyes)
+    xc_lt_want_with_pic='yes'
+    ;;
+esac
+
+#
+# Default behavior on some systems where building a shared library out
+# of non-PIC compiled objects will fail with following linker error
+# "relocation R_X86_64_32 can not be used when making a shared object"
+# is to build PIC objects even for static libraries. This behavior may
+# be overriden using 'configure --disable-shared --without-pic'.
+#
+
+if test "x$xc_lt_want_with_pic" = 'xdefault'; then
+  case $host_cpu in @%:@ (
+    x86_64 | amd64 | ia64)
+      case $host_os in @%:@ (
+        linux* | freebsd*)
+          xc_lt_want_with_pic='yes'
+          ;;
+      esac
+      ;;
+  esac
+fi
+
+#
+# Make libtool aware of current PIC preference taking in account that,
+# depending on host characteristics, libtool may modify PIC default
+# behavior to fit host system idiosyncrasies later in this script.
+#
+
+with_pic=$xc_lt_want_with_pic
+dnl
+m4_define([$0],[])dnl
+])
+
+
+dnl _XC_LIBTOOL_BODY
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl This macro performs embedding of libtool code into
+dnl configure script, regardless of libtool version in
+dnl use when generating configure script.
+
+m4_define([_XC_LIBTOOL_BODY],
+[dnl
+## ----------------------- ##
+##  Start of libtool code  ##
+## ----------------------- ##
+m4_ifdef([LT_INIT],
+[dnl
+LT_INIT([win32-dll])
+],[dnl
+AC_LIBTOOL_WIN32_DLL
+AC_PROG_LIBTOOL
+])dnl
+## --------------------- ##
+##  End of libtool code  ##
+## --------------------- ##
+dnl
+m4_define([$0], [])[]dnl
+])
+
+
+dnl _XC_CHECK_LT_BUILD_LIBRARIES
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks wether libtool shared and static libraries
+dnl are finally built depending on user input, default
+dnl behavior and knowledge that libtool has about host
+dnl characteristics.
+dnl Results stored in following shell variables:
+dnl   xc_lt_build_shared
+dnl   xc_lt_build_static
+
+m4_define([_XC_CHECK_LT_BUILD_LIBRARIES],
+[dnl
+#
+# Verify if finally libtool shared libraries will be built
+#
+
+case "x$enable_shared" in @%:@ ((
+  xyes | xno)
+    xc_lt_build_shared=$enable_shared
+    ;;
+  *)
+    AC_MSG_ERROR([unexpected libtool enable_shared value: $enable_shared])
+    ;;
+esac
+
+#
+# Verify if finally libtool static libraries will be built
+#
+
+case "x$enable_static" in @%:@ ((
+  xyes | xno)
+    xc_lt_build_static=$enable_static
+    ;;
+  *)
+    AC_MSG_ERROR([unexpected libtool enable_static value: $enable_static])
+    ;;
+esac
+dnl
+m4_define([$0],[])dnl
+])
+
+
+dnl _XC_CHECK_LT_SHLIB_USE_VERSION_INFO
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks if the -version-info linker flag must be
+dnl provided when building libtool shared libraries.
+dnl Result stored in xc_lt_shlib_use_version_info.
+
+m4_define([_XC_CHECK_LT_SHLIB_USE_VERSION_INFO],
+[dnl
+#
+# Verify if libtool shared libraries should be linked using flag -version-info
+#
+
+AC_MSG_CHECKING([whether to build shared libraries with -version-info])
+xc_lt_shlib_use_version_info='yes'
+if test "x$version_type" = 'xnone'; then
+  xc_lt_shlib_use_version_info='no'
+fi
+case $host_os in @%:@ (
+  amigaos*)
+    xc_lt_shlib_use_version_info='yes'
+    ;;
+esac
+AC_MSG_RESULT([$xc_lt_shlib_use_version_info])
+dnl
+m4_define([$0], [])[]dnl
+])
+
+
+dnl _XC_CHECK_LT_SHLIB_USE_NO_UNDEFINED
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks if the -no-undefined linker flag must be
+dnl provided when building libtool shared libraries.
+dnl Result stored in xc_lt_shlib_use_no_undefined.
+
+m4_define([_XC_CHECK_LT_SHLIB_USE_NO_UNDEFINED],
+[dnl
+#
+# Verify if libtool shared libraries should be linked using flag -no-undefined
+#
+
+AC_MSG_CHECKING([whether to build shared libraries with -no-undefined])
+xc_lt_shlib_use_no_undefined='no'
+if test "x$allow_undefined" = 'xno'; then
+  xc_lt_shlib_use_no_undefined='yes'
+elif test "x$allow_undefined_flag" = 'xunsupported'; then
+  xc_lt_shlib_use_no_undefined='yes'
+fi
+case $host_os in @%:@ (
+  cygwin* | mingw* | pw32* | cegcc* | os2* | aix*)
+    xc_lt_shlib_use_no_undefined='yes'
+    ;;
+esac
+AC_MSG_RESULT([$xc_lt_shlib_use_no_undefined])
+dnl
+m4_define([$0], [])[]dnl
+])
+
+
+dnl _XC_CHECK_LT_SHLIB_USE_MIMPURE_TEXT
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks if the -mimpure-text linker flag must be
+dnl provided when building libtool shared libraries.
+dnl Result stored in xc_lt_shlib_use_mimpure_text.
+
+m4_define([_XC_CHECK_LT_SHLIB_USE_MIMPURE_TEXT],
+[dnl
+#
+# Verify if libtool shared libraries should be linked using flag -mimpure-text
+#
+
+AC_MSG_CHECKING([whether to build shared libraries with -mimpure-text])
+xc_lt_shlib_use_mimpure_text='no'
+case $host_os in @%:@ (
+  solaris2*)
+    if test "x$GCC" = 'xyes'; then
+      xc_lt_shlib_use_mimpure_text='yes'
+    fi
+    ;;
+esac
+AC_MSG_RESULT([$xc_lt_shlib_use_mimpure_text])
+dnl
+m4_define([$0], [])[]dnl
+])
+
+
+dnl _XC_CHECK_LT_BUILD_WITH_PIC
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks wether libtool shared and static libraries
+dnl would be built with PIC depending on user input,
+dnl default behavior and knowledge that libtool has
+dnl about host characteristics.
+dnl Results stored in following shell variables:
+dnl   xc_lt_build_shared_with_pic
+dnl   xc_lt_build_static_with_pic
+
+m4_define([_XC_CHECK_LT_BUILD_WITH_PIC],
+[dnl
+#
+# Find out wether libtool libraries would be built wit PIC
+#
+
+case "x$pic_mode" in @%:@ ((((
+  xdefault)
+    xc_lt_build_shared_with_pic='yes'
+    xc_lt_build_static_with_pic='no'
+    ;;
+  xyes)
+    xc_lt_build_shared_with_pic='yes'
+    xc_lt_build_static_with_pic='yes'
+    ;;
+  xno)
+    xc_lt_build_shared_with_pic='no'
+    xc_lt_build_static_with_pic='no'
+    ;;
+  *)
+    xc_lt_build_shared_with_pic='unknown'
+    xc_lt_build_static_with_pic='unknown'
+    AC_MSG_WARN([unexpected libtool pic_mode value: $pic_mode])
+    ;;
+esac
+AC_MSG_CHECKING([whether to build shared libraries with PIC])
+AC_MSG_RESULT([$xc_lt_build_shared_with_pic])
+AC_MSG_CHECKING([whether to build static libraries with PIC])
+AC_MSG_RESULT([$xc_lt_build_static_with_pic])
+dnl
+m4_define([$0],[])dnl
+])
+
+
+dnl _XC_CHECK_LT_BUILD_SINGLE_VERSION
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Checks wether a libtool shared or static library
+dnl is finally built exclusively without the other.
+dnl Results stored in following shell variables:
+dnl   xc_lt_build_shared_only
+dnl   xc_lt_build_static_only
+
+m4_define([_XC_CHECK_LT_BUILD_SINGLE_VERSION],
+[dnl
+#
+# Verify if libtool shared libraries will be built while static not built
+#
+
+AC_MSG_CHECKING([whether to build shared libraries only])
+if test "$xc_lt_build_shared" = 'yes' &&
+  test "$xc_lt_build_static" = 'no'; then
+  xc_lt_build_shared_only='yes'
+else
+  xc_lt_build_shared_only='no'
+fi
+AC_MSG_RESULT([$xc_lt_build_shared_only])
+
+#
+# Verify if libtool static libraries will be built while shared not built
+#
+
+AC_MSG_CHECKING([whether to build static libraries only])
+if test "$xc_lt_build_static" = 'yes' &&
+  test "$xc_lt_build_shared" = 'no'; then
+  xc_lt_build_static_only='yes'
+else
+  xc_lt_build_static_only='no'
+fi
+AC_MSG_RESULT([$xc_lt_build_static_only])
+dnl
+m4_define([$0],[])dnl
+])
+
+
+dnl _XC_LIBTOOL_POSTLUDE
+dnl -------------------------------------------------
+dnl Private macro.
+dnl
+dnl Performs several checks related with libtool that
+dnl can not be done unless libtool code has already
+dnl been executed. See individual check descriptions
+dnl for further info.
+
+m4_define([_XC_LIBTOOL_POSTLUDE],
+[dnl
+_XC_CHECK_LT_BUILD_LIBRARIES
+_XC_CHECK_LT_SHLIB_USE_VERSION_INFO
+_XC_CHECK_LT_SHLIB_USE_NO_UNDEFINED
+_XC_CHECK_LT_SHLIB_USE_MIMPURE_TEXT
+_XC_CHECK_LT_BUILD_WITH_PIC
+_XC_CHECK_LT_BUILD_SINGLE_VERSION
+dnl
+m4_define([$0],[])dnl
+])
+
+
+dnl XC_LIBTOOL
+dnl -------------------------------------------------
+dnl Public macro.
+dnl
+dnl This macro embeds libtool machinery into configure
+dnl script, regardless of libtool version, and performs
+dnl several additional checks whose results can be used
+dnl later on.
+dnl
+dnl Usage of this macro ensures that generated configure
+dnl script uses equivalent logic irrespective of autoconf
+dnl or libtool version being used to generate configure
+dnl script.
+dnl
+dnl Results stored in following shell variables:
+dnl   xc_lt_build_shared
+dnl   xc_lt_build_static
+dnl   xc_lt_shlib_use_version_info
+dnl   xc_lt_shlib_use_no_undefined
+dnl   xc_lt_shlib_use_mimpure_text
+dnl   xc_lt_build_shared_with_pic
+dnl   xc_lt_build_static_with_pic
+dnl   xc_lt_build_shared_only
+dnl   xc_lt_build_static_only
+
+AC_DEFUN([XC_LIBTOOL],
+[dnl
+AC_PREREQ([2.50])dnl
+dnl
+AC_BEFORE([$0],[LT_INIT])dnl
+AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
+AC_BEFORE([$0],[AC_LIBTOOL_WIN32_DLL])dnl
+dnl
+AC_REQUIRE([XC_CHECK_PATH_SEPARATOR])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_PROG_CC])dnl
+dnl
+_XC_LIBTOOL_PREAMBLE
+_XC_LIBTOOL_BODY
+_XC_LIBTOOL_POSTLUDE
+dnl
+m4_ifdef([AC_LIBTOOL_WIN32_DLL],
+  [m4_undefine([AC_LIBTOOL_WIN32_DLL])])dnl
+m4_ifdef([AC_PROG_LIBTOOL],
+  [m4_undefine([AC_PROG_LIBTOOL])])dnl
+m4_ifdef([LT_INIT],
+  [m4_undefine([LT_INIT])])dnl
+dnl
+m4_define([$0],[])dnl
+])
+