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2a7a4d77d7
The original check was not compliant with autoconf's syntax, did not have a very good behaviour for user and was not easy to make evolve. The new macro: - uses as much as possible autoconf macros for portability and code consistency; - checks also for header usability with the compiler; - provides a consistent behaviour on yes/no/auto (if user explicitly enables support, do not silently disable if not found; if library is found but not the header, complain to let user install it or explicitly disable support) The feature is also no more disabled by default, as it is something user would expect from a modern window manager. Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
101 lines
4.4 KiB
Plaintext
101 lines
4.4 KiB
Plaintext
# wm_xext_check.m4 - Macros to check for X extensions support libraries
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#
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# Copyright (c) 2013 Christophe CURIS
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# WM_XEXT_CHECK_XSHAPE
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# --------------------
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#
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# Check for the X Shaped Window extension
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# The check depends on variable 'enable_xshape' being either:
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# yes - detect, fail if not found
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# no - do not detect, disable support
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# auto - detect, disable if not found
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#
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# When found, append appropriate stuff in XLIBS, and append info to
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# the variable 'supported_xext'
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# When not found, append info to variable 'unsupported'
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AC_DEFUN_ONCE([WM_XEXT_CHECK_XSHAPE],
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[WM_LIB_CHECK([XShape], [-lXext], [XShapeSelectInput], [$XLIBS],
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[wm_save_CFLAGS="$CFLAGS"
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AS_IF([wm_fn_lib_try_compile "X11/extensions/shape.h" "Window win;" "XShapeSelectInput(NULL, win, 0)" ""],
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[],
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[AC_MSG_ERROR([found $CACHEVAR but cannot compile using XShape header])])
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CFLAGS="$wm_save_CFLAGS"],
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[supported_xext], [XLIBS], [enable_shape], [-])dnl
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]) dnl AC_DEFUN
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# WM_XEXT_CHECK_XINERAMA
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# ----------------------
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#
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# Check for the Xinerama extension for multiscreen-as-one support
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# The check depends on variable 'enable_xinerama' being either:
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# yes - detect, fail if not found
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# no - do not detect, disable support
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# auto - detect, disable if not found
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#
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# When found, append appropriate stuff in LIBXINERAMA, and append info to
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# the variable 'supported_xext'
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# When not found, append info to variable 'unsupported'
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AC_DEFUN_ONCE([WM_XEXT_CHECK_XINERAMA],
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[LIBXINERAMA=""
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AS_IF([test "x$enable_xinerama" = "xno"],
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[unsupported="$unsupported Xinerama"],
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[AC_CACHE_CHECK([for Xinerama support library], [wm_cv_xext_xinerama],
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[wm_cv_xext_xinerama=no
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dnl
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dnl We check that the library is available
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wm_save_LIBS="$LIBS"
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for wm_arg in dnl
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dnl Lib flag % Function name % info
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"-lXinerama % XineramaQueryScreens" dnl
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"-lXext % XineramaGetInfo % solaris" ; do
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AS_IF([wm_fn_lib_try_link "`echo "$wm_arg" | dnl
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sed -e 's,^[[^%]]*% *,,' | sed -e 's, *%.*$,,' `" dnl
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"$XLFLAGS $XLIBS `echo "$wm_arg" | sed -e 's, *%.*$,,' `"],
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[wm_cv_xext_xinerama="`echo "$wm_arg" | sed -e 's, *%[[^%]]*, ,' `"
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break])
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done
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LIBS="$wm_save_LIBS"
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AS_IF([test "x$enable_xinerama$wm_cv_xext_xinerama" = "xyesno"],
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[AC_MSG_ERROR([explicit Xinerama support requested but no library found])])
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dnl
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dnl A library was found, check if header is available and compile
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wm_save_CFLAGS="$CFLAGS"
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AS_CASE([`echo "$wm_cv_xext_xinerama" | sed -e 's,^[[^%]]*,,' `],
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[*solaris*], [wm_header="X11/extensions/xinerama.h" ; wm_fct="XineramaGetInfo(NULL, 0, NULL, NULL, &intval)"],
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[wm_header="X11/extensions/Xinerama.h" ; wm_fct="XineramaQueryScreens(NULL, &intval)"])
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AS_IF([wm_fn_lib_try_compile "$wm_header" "int intval;" "$wm_fct" ""],
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[],
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[AC_MSG_ERROR([found $wm_cv_xext_xinerama but cannot compile with the header])])
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AS_UNSET([wm_header])
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AS_UNSET([wm_fct])
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CFLAGS="$wm_save_CFLAGS"])
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AS_IF([test "x$wm_cv_xext_xinerama" = "xno"],
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[unsupported="$unsupported Xinerama"
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enable_xinerama="no"],
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[LIBXINERAMA="`echo "$wm_cv_xext_xinerama" | sed -e 's, *%.*$,,' `"
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AC_DEFINE([USE_XINERAMA], [1],
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[defined when usable Xinerama library with header was found])
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AS_CASE([`echo "$wm_cv_xext_xinerama" | sed -e 's,^[[^%]]*,,' `],
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[*solaris*], [AC_DEFINE([SOLARIS_XINERAMA], [1],
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[defined when the Solaris Xinerama extension was detected])])
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supported_xext="$supported_xext Xinerama"])
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])
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AC_SUBST(LIBXINERAMA)dnl
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])
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