71 lines
1.8 KiB
Plaintext
71 lines
1.8 KiB
Plaintext
dnl Detection and configuration of the visibility feature of gcc
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dnl Vincent Torri 2006-02-11
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dnl
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dnl XCB_CHECK_VISIBILITY([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
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dnl Check the visibility feature of gcc
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dnl
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AC_DEFUN([XCB_CHECK_VISIBILITY],
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[
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AC_MSG_CHECKING([whether ${CC} supports symbol visibility])
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save_CFLAGS=${CFLAGS}
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CFLAGS="$CFLAGS -fvisibility=hidden -fvisibility-inlines-hidden"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#pragma GCC visibility push(hidden)
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extern void f(int);
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#pragma GCC visibility pop
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]],
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[[]]
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)],
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[AC_DEFINE(
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GCC_HAS_VISIBILITY,
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[],
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[Defined if GCC supports the visibility feature])
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m4_if([$1], [], [:], [$1])
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AC_MSG_RESULT(yes)],
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[m4_if([$2], [], [:], [$2])
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AC_MSG_RESULT(no)])
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CFLAGS=${save_CFLAGS}
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])
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dnl Detection and configuration of the visibility feature of gcc
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dnl Vincent Torri 2006-02-11
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dnl
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dnl XCB_EXTENSION(name, default)
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dnl set the X extension
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dnl
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AC_DEFUN([XCB_EXTENSION],
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[dnl
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pushdef([UP], translit([$1], [-a-z], [_A-Z]))dnl
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pushdef([DOWN], translit([$1], [A-Z], [a-z]))dnl
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dnl
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m4_if([$2], [yes], [m4_define([xcb_defopt], [yes])],
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[$2], [no], [m4_define([xcb_defopt], [no])],
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m4_define([xcb_defopt], [auto]))dnl
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AC_ARG_ENABLE(DOWN,
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[AS_HELP_STRING([--enable-[]DOWN],
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[Build XCB $1 Extension (default: ]xcb_defopt[)])],
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[BUILD_[]UP=$enableval],
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[BUILD_[]UP=xcb_defopt])
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dnl
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m4_if(xcb_defopt, [auto], [
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# This extension has a default value of "auto" and depends on the value of $2
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if test "x$BUILD_[]UP" = "xauto" ; then
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BUILD_[]UP=$2
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fi
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if test "x$BUILD_[]UP" = "xyes" ; then
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if test "x$2" = "xno" ; then
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AC_MSG_ERROR([Extension []UP requested, but dependencies are not met])
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fi
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fi])
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m4_undefine([xcb_defopt])dnl
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AM_CONDITIONAL(BUILD_[]UP, [test "x$BUILD_[]UP" = "xyes"])
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])
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dnl End of acinclude.m4
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