1 # wm_xext_check.m4 - Macros to check for X extensions support libraries
3 # Copyright (c) 2013 Christophe CURIS
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License along
16 # with this program; if not, write to the Free Software Foundation, Inc.,
17 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 # WM_XEXT_CHECK_XSHAPE
20 # --------------------
22 # Check for the X Shaped Window extension
23 # The check depends on variable 'enable_xshape' being either:
24 # yes - detect, fail if not found
25 # no - do not detect, disable support
26 # auto - detect, disable if not found
28 # When found, append appropriate stuff in XLIBS, and append info to
29 # the variable 'supported_xext'
30 # When not found, append info to variable 'unsupported'
31 AC_DEFUN_ONCE([WM_XEXT_CHECK_XSHAPE],
32 [WM_LIB_CHECK([XShape], [-lXext], [XShapeSelectInput], [$XLIBS],
33 [wm_save_CFLAGS="$CFLAGS"
34 AS_IF([wm_fn_lib_try_compile "X11/extensions/shape.h" "Window win;" "XShapeSelectInput(NULL, win, 0)" ""],
36 [AC_MSG_ERROR([found $CACHEVAR but cannot compile using XShape header])])
37 CFLAGS="$wm_save_CFLAGS"],
38 [supported_xext], [XLIBS], [enable_shape], [-])dnl
45 # Check for the MIT-SHM extension for Shared Memory support
46 # The check depends on variable 'enable_shm' being either:
47 # yes - detect, fail if not found
48 # no - do not detect, disable support
49 # auto - detect, disable if not found
51 # When found, append appropriate stuff in XLIBS, and append info to
52 # the variable 'supported_xext'
53 # When not found, append info to variable 'unsupported'
54 AC_DEFUN_ONCE([WM_XEXT_CHECK_XSHM],
55 [WM_LIB_CHECK([XShm], [-lXext], [XShmAttach], [$XLIBS],
56 [wm_save_CFLAGS="$CFLAGS"
57 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([dnl
58 @%:@include <X11/Xlib.h>
59 @%:@include <X11/extensions/XShm.h>
63 XShmAttach(NULL, &si);])],
65 [AC_MSG_ERROR([found $CACHEVAR but cannot compile using XShm header])])
66 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([dnl
67 @%:@include <sys/ipc.h>
68 @%:@include <sys/shm.h>
70 shmget(IPC_PRIVATE, 1024, IPC_CREAT);])],
72 [AC_MSG_ERROR([found $CACHEVAR but cannot compile using ipc/shm headers])])
73 CFLAGS="$wm_save_CFLAGS"],
74 [supported_xext], [XLIBS], [enable_shm], [-])dnl
78 # WM_XEXT_CHECK_XINERAMA
79 # ----------------------
81 # Check for the Xinerama extension for multiscreen-as-one support
82 # The check depends on variable 'enable_xinerama' being either:
83 # yes - detect, fail if not found
84 # no - do not detect, disable support
85 # auto - detect, disable if not found
87 # When found, append appropriate stuff in LIBXINERAMA, and append info to
88 # the variable 'supported_xext'
89 # When not found, append info to variable 'unsupported'
90 AC_DEFUN_ONCE([WM_XEXT_CHECK_XINERAMA],
92 AS_IF([test "x$enable_xinerama" = "xno"],
93 [unsupported="$unsupported Xinerama"],
94 [AC_CACHE_CHECK([for Xinerama support library], [wm_cv_xext_xinerama],
95 [wm_cv_xext_xinerama=no
97 dnl We check that the library is available
100 dnl Lib flag % Function name % info
101 "-lXinerama % XineramaQueryScreens" dnl
102 "-lXext % XineramaGetInfo % solaris" ; do
103 AS_IF([wm_fn_lib_try_link "`echo "$wm_arg" | dnl
104 sed -e 's,^[[^%]]*% *,,' | sed -e 's, *%.*$,,' `" dnl
105 "$XLFLAGS $XLIBS `echo "$wm_arg" | sed -e 's, *%.*$,,' `"],
106 [wm_cv_xext_xinerama="`echo "$wm_arg" | sed -e 's, *%[[^%]]*, ,' `"
110 AS_IF([test "x$enable_xinerama$wm_cv_xext_xinerama" = "xyesno"],
111 [AC_MSG_ERROR([explicit Xinerama support requested but no library found])])
113 dnl A library was found, check if header is available and compile
114 wm_save_CFLAGS="$CFLAGS"
115 AS_CASE([`echo "$wm_cv_xext_xinerama" | sed -e 's,^[[^%]]*,,' `],
116 [*solaris*], [wm_header="X11/extensions/xinerama.h" ; wm_fct="XineramaGetInfo(NULL, 0, NULL, NULL, &intval)"],
117 [wm_header="X11/extensions/Xinerama.h" ; wm_fct="XineramaQueryScreens(NULL, &intval)"])
118 AS_IF([wm_fn_lib_try_compile "$wm_header" "int intval;" "$wm_fct" ""],
120 [AC_MSG_ERROR([found $wm_cv_xext_xinerama but cannot compile with the header])])
121 AS_UNSET([wm_header])
123 CFLAGS="$wm_save_CFLAGS"])
124 AS_IF([test "x$wm_cv_xext_xinerama" = "xno"],
125 [unsupported="$unsupported Xinerama"
126 enable_xinerama="no"],
127 [LIBXINERAMA="`echo "$wm_cv_xext_xinerama" | sed -e 's, *%.*$,,' `"
128 AC_DEFINE([USE_XINERAMA], [1],
129 [defined when usable Xinerama library with header was found])
130 AS_CASE([`echo "$wm_cv_xext_xinerama" | sed -e 's,^[[^%]]*,,' `],
131 [*solaris*], [AC_DEFINE([SOLARIS_XINERAMA], [1],
132 [defined when the Solaris Xinerama extension was detected])])
133 supported_xext="$supported_xext Xinerama"])
135 AC_SUBST(LIBXINERAMA)dnl
139 # WM_XEXT_CHECK_XRANDR
140 # --------------------
142 # Check for the X RandR (Resize-and-Rotate) extension
143 # The check depends on variable 'enable_xrandr' being either:
144 # yes - detect, fail if not found
145 # no - do not detect, disable support
146 # auto - detect, disable if not found
148 # When found, append appropriate stuff in LIBXRANDR, and append info to
149 # the variable 'supported_xext'
150 # When not found, append info to variable 'unsupported'
151 AC_DEFUN_ONCE([WM_XEXT_CHECK_XRANDR],
152 [WM_LIB_CHECK([XRandR], [-lXrandr], [XRRQueryExtension], [$XLIBS],
153 [wm_save_CFLAGS="$CFLAGS"
154 AS_IF([wm_fn_lib_try_compile "X11/extensions/Xrandr.h" "Display *dpy;" "XRRQueryExtension(dpy, NULL, NULL)" ""],
156 [AC_MSG_ERROR([found $CACHEVAR but cannot compile using XRandR header])])
157 CFLAGS="$wm_save_CFLAGS"],
158 [supported_xext], [LIBXRANDR], [], [-])dnl
159 AC_SUBST([LIBXRANDR])dnl