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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
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