dnl Detection and configuration of the visibility feature of gcc

dnl Vincent Torri 2006-02-11

dnl

dnl XCB_CHECK_VISIBILITY([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])

dnl Check the visibility feature of gcc

dnl

AC_DEFUN([XCB_CHECK_VISIBILITY],

[

AC_MSG_CHECKING([whether ${CC} supports symbol visibility])

save_CFLAGS=${CFLAGS}

CFLAGS="$CFLAGS -fvisibility=hidden -fvisibility-inlines-hidden"

AC_COMPILE_IFELSE(

   [AC_LANG_PROGRAM(

      [[

#pragma GCC visibility push(hidden)

extern void f(int);

#pragma GCC visibility pop

      ]],

      [[]]

    )],

   [AC_DEFINE(

       GCC_HAS_VISIBILITY,

       [],

       [Defined if GCC supports the visibility feature])

    m4_if([$1], [], [:], [$1])

    AC_MSG_RESULT(yes)],

   [m4_if([$2], [], [:], [$2])

    AC_MSG_RESULT(no)])

CFLAGS=${save_CFLAGS}

])

dnl Detection and configuration of the visibility feature of gcc

dnl Vincent Torri 2006-02-11

dnl

dnl XCB_EXTENSION(name, default)

dnl set the X extension

dnl

AC_DEFUN([XCB_EXTENSION],

[dnl

pushdef([UP], translit([$1], [-a-z], [_A-Z]))dnl

pushdef([DOWN], translit([$1], [A-Z], [a-z]))dnl

dnl

m4_if([$2], [yes], [m4_define([xcb_defopt], [yes])],

      [$2], [no],  [m4_define([xcb_defopt], [no])],

      m4_define([xcb_defopt], [auto]))dnl

AC_ARG_ENABLE(DOWN,

    [AS_HELP_STRING([--enable-[]DOWN],

                    [Build XCB $1 Extension (default: ]xcb_defopt[)])],

    [BUILD_[]UP=$enableval],

    [BUILD_[]UP=xcb_defopt])

dnl

m4_if(xcb_defopt, [auto], [

# This extension has a default value of "auto" and depends on the value of $2

if test "x$BUILD_[]UP" = "xauto" ; then

    BUILD_[]UP=$2

fi

if test "x$BUILD_[]UP" = "xyes" ; then

    if test "x$2" = "xno" ; then

      AC_MSG_ERROR([Extension []UP requested, but dependencies are not met])

    fi

fi])

m4_undefine([xcb_defopt])dnl

AM_CONDITIONAL(BUILD_[]UP, [test "x$BUILD_[]UP" = "xyes"])

])

dnl End of acinclude.m4