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dnl Check for FFTW3
FFTW_CFLAGS=
FFTW_LIBS=
AC_ARG_WITH(fftw,[ --with-fftw=PFX Prefix where fftw is installed (optional)], fftw_prefix="$withval", fftw_prefix="")
AC_ARG_WITH(fftw-libraries,[ --with-fftw-libraries=DIR Directory where fftw library is installed (optional)], fftw_libraries="$withval", fftw_libraries="")
AC_ARG_WITH(fftw-includes,[ --with-fftw-includes=DIR Directory where fftw header files are installed (optional)], fftw_includes="$withval", fftw_includes="")
AC_ARG_ENABLE(fftwtest, [ --disable-fftwtest Do not try to compile and run a test fftw program],, enable_fftwtest=yes)
if test "x$fftw_libraries" != "x" ; then
FFTW_LIBS="-L$fftw_libraries"
elif test "x$fftw_prefix" != "x" ; then
FFTW_LIBS="-L$fftw_prefix/lib"
elif test "x$prefix" != "xNONE"; then
FFTW_LIBS="-L$prefix/lib"
fi
if test `uname` == Darwin; then
FFTW_LIBS="$FFTW_LIBS -lfftw3"
else
FFTW_LIBS="$FFTW_LIBS -lfftw3f"
fi
if test "x$fftw_includes" != "x" ; then
FFTW_CFLAGS="-I$fftw_includes"
elif test "x$fftw_prefix" != "x" ; then
FFTW_CFLAGS="-I$fftw_prefix/include"
elif test "x$prefix" != "xNONE"; then
FFTW_CFLAGS="-I$prefix/include -I/usr/include"
fi
AC_MSG_CHECKING(for FFTW)
no_fftw=""
if test "x$enable_fftwtest" = "xyes" ; then
ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $FFTW_CFLAGS"
LIBS="$LIBS $FFTW_LIBS"
dnl
dnl Now check if the installed fftw is sufficiently new.
dnl
rm -f conf.fftwtest
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fftw3.h>
#ifdef FFTW_USE_DOUBLE
#define FFT_COMPLEX_TYPE fftw_complex
#define FFT_REAL_TYPE double
#define FFT_PLAN_TYPE fftw_plan
#define FFT_CREATE_PLAN fftw_plan_dft_c2r_2d
#define FFT_DELETE_PLAN fftw_destroy_plan
#define FFT_EXECUTE_PLAN fftw_execute
#else
#define FFT_COMPLEX_TYPE fftwf_complex
#define FFT_REAL_TYPE float
#define FFT_PLAN_TYPE fftwf_plan
#define FFT_CREATE_PLAN fftwf_plan_dft_c2r_2d
#define FFT_DELETE_PLAN fftwf_destroy_plan
#define FFT_EXECUTE_PLAN fftwf_execute
#endif
#define N 10
int main ()
{
FFT_COMPLEX_TYPE fft_in[N*(N/2+1)];
FFT_REAL_TYPE fft_out[N*N];
FFT_PLAN_TYPE plan;
plan = FFT_CREATE_PLAN(N, N, fft_in, fft_out, 0);
system("touch conf.fftwtest");
return 0;
}
],, no_fftw=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
if test "x$no_fftw" = "x" ; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
if test -f conf.fftwtest ; then
:
else
echo "*** Could not run FFTW test program, checking why..."
CFLAGS="$CFLAGS $FFTW_CFLAGS"
LIBS="$LIBS $FFTW_LIBS"
AC_TRY_LINK([
#include <stdio.h>
#include <fftw3.h>
], [ return 0; ],
[ echo "*** The test program compiled, but did not run. This usually means"
echo "*** that the run-time linker is not finding FFTW or finding the wrong"
echo "*** version of FFTW. If it is not finding FFTW, you'll need to set your"
echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location Also, make sure you have run ldconfig if that"
echo "*** is required on your system"
echo "***"
echo "*** If you have an old version installed, it is best to remove it, although"
echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],
[ echo "*** The test program failed to compile or link. See the file config.log for the"
echo "*** exact error that occured. This usually means FFTW was incorrectly installed"
echo "*** or that you have moved FFTW since it was installed." ])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
FFTW_CFLAGS=""
FFTW_LIBS=""
AC_MSG_ERROR([
FFTW must be installed on your system but couldn't be found.
Please check that FFTW is installed.
FFTW version 3 is required.
])
fi
rm -f conf.fftwtest
AC_SUBST(FFTW_CFLAGS)
AC_SUBST(FFTW_LIBS)
|
