1 # -*- mode: autoconf -*-
5 # Check for an OpenCL implementation. If CL is found, _OPENCL is defined and
6 # the required compiler and linker flags are included in the output variables
7 # "CL_CFLAGS" and "CL_LIBS", respectively. If no usable CL implementation is
8 # found, "no_cl" is set to "yes".
10 # If the header "CL/OpenCL.h" is found, "HAVE_CL_OPENCL_H" is defined. If the
11 # header "OpenCL/OpenCL.h" is found, HAVE_OPENCL_OPENCL_H is defined. These
12 # preprocessor definitions may not be mutually exclusive.
14 # Based on AX_CHECK_GL, version: 2.4 author: Braden McDaniel
15 # <braden@endoframe.com>
17 # This program is free software; you can redistribute it and/or modify
18 # it under the terms of the GNU General Public License as published by
19 # the Free Software Foundation; either version 2, or (at your option)
22 # This program is distributed in the hope that it will be useful,
23 # but WITHOUT ANY WARRANTY; without even the implied warranty of
24 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 # GNU General Public License for more details.
27 # You should have received a copy of the GNU General Public License
28 # along with this program; if not, write to the Free Software
29 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
32 # As a special exception, the you may copy, distribute and modify the
33 # configure scripts that are the output of Autoconf when processing
34 # the Macro. You need not follow the terms of the GNU General Public
35 # License when using or distributing such scripts.
38 [AC_REQUIRE([AC_CANONICAL_HOST])dnl
39 AC_REQUIRE([AC_PROG_SED])dnl
40 AC_REQUIRE([ACX_PTHREAD])dnl
42 AC_ARG_ENABLE([opencl],
43 [AC_HELP_STRING([--disable-opencl],
44 [do not use OpenCL])],
45 [disable_opencl=$enableval],
46 [disable_opencl='yes'])
48 if test "$disable_opencl" = 'yes'; then
51 AS_IF([test X$ax_compiler_ms = Xno],
52 [CL_CFLAGS="${PTHREAD_CFLAGS}"; CL_LIBS="${PTHREAD_LIBS} -lm"])
54 ax_save_CPPFLAGS=$CPPFLAGS
55 CPPFLAGS="$CL_CFLAGS $CPPFLAGS"
56 AC_CHECK_HEADERS([CL/cl.h OpenCL/cl.h])
57 CPPFLAGS=$ax_save_CPPFLAGS
59 AC_CHECK_HEADERS([windows.h])
61 m4_define([AX_OPENCL_PROGRAM],
63 # if defined(HAVE_WINDOWS_H) && defined(_WIN32)
68 # elif defined(HAVE_OPENCL_CL_H)
69 # include <OpenCL/cl.h>
73 [[clCreateContextFromType(0,0,0,0,0)]])])
75 AC_CACHE_CHECK([for OpenCL library], [ax_cv_check_cl_libcl],
76 [ax_cv_check_cl_libcl=no
78 x86_64) ax_check_cl_libdir=lib64 ;;
79 *) ax_check_cl_libdir=lib ;;
81 ax_save_CPPFLAGS=$CPPFLAGS
82 CPPFLAGS="$CL_CFLAGS $CPPFLAGS"
85 ax_check_libs="-lOpenCL -lCL -lclparser"
86 for ax_lib in $ax_check_libs; do
87 AS_IF([test X$ax_compiler_ms = Xyes],
88 [ax_try_lib=`echo $ax_lib | $SED -e 's/^-l//' -e 's/$/.lib/'`],
90 LIBS="$ax_try_lib $CL_LIBS $ax_save_LIBS"
91 AC_LINK_IFELSE([AX_OPENCL_PROGRAM],
92 [ax_cv_check_cl_libcl=$ax_try_lib; break],
93 [ax_check_cl_nvidia_flags="-L/usr/$ax_check_cl_libdir/nvidia" LIBS="$ax_try_lib $ax_check_cl_nvidia_flags $CL_LIBS $ax_save_LIBS"
94 AC_LINK_IFELSE([AX_OPENCL_PROGRAM],
95 [ax_cv_check_cl_libcl="$ax_try_lib $ax_check_cl_nvidia_flags"; break],
96 [ax_check_cl_dylib_flag='-Wl,-framework,OpenCL -L/System/Library/Frameworks/OpenCL.framework/Versions/A/Libraries' LIBS="$ax_try_lib $ax_check_cl_dylib_flag $CL_LIBS $ax_save_LIBS"
97 AC_LINK_IFELSE([AX_OPENCL_PROGRAM],
98 [ax_cv_check_cl_libcl="$ax_try_lib $ax_check_cl_dylib_flag"; break])])])
101 AS_IF([test "X$ax_cv_check_cl_libcl" = Xno -a X$no_x = Xyes],
102 [LIBS='-Wl,-framework,OpenCL'
103 AC_LINK_IFELSE([AX_OPENCL_PROGRAM],
104 [ax_cv_check_cl_libcl=$LIBS])])
107 CPPFLAGS=$ax_save_CPPFLAGS])
109 AS_IF([test "X$ax_cv_check_cl_libcl" = Xno],
110 [no_cl=yes; CL_CFLAGS=""; CL_LIBS=""],
111 [CL_LIBS="$ax_cv_check_cl_libcl $CL_LIBS"; AC_DEFINE([_OPENCL], [1],
112 [Define this for the OpenCL Accelerator])])
116 AC_SUBST([CL_CFLAGS])