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ee3422dd10
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) Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
125 lines
5.3 KiB
Plaintext
125 lines
5.3 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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# WM_XEXT_CHECK_XRANDR
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# --------------------
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#
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# Check for the X RandR (Resize-and-Rotate) extension
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# The check depends on variable 'enable_xrandr' 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 LIBXRANDR, 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_XRANDR],
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[WM_LIB_CHECK([XRandR], [-lXrandr], [XRRQueryExtension], [$XLIBS],
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[wm_save_CFLAGS="$CFLAGS"
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AS_IF([wm_fn_lib_try_compile "X11/extensions/Xrandr.h" "Display *dpy;" "XRRQueryExtension(dpy, NULL, NULL)" ""],
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[],
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[AC_MSG_ERROR([found $CACHEVAR but cannot compile using XRandR header])])
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CFLAGS="$wm_save_CFLAGS"],
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[supported_xext], [LIBXRANDR], [], [-])dnl
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AC_SUBST([LIBXRANDR])dnl
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]) dnl AC_DEFUN
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