Remove the FFTW bindings from Base (#21956)

.travis.yml

@@ -86,7 +86,7 @@ before_install:
         BUILDOPTS="-j3 USECLANG=1 LLVM_CONFIG=$(brew --prefix llvm39-julia)/bin/llvm-config LLVM_SIZE=$(brew --prefix llvm39-julia)/bin/llvm-size";
         BUILDOPTS="$BUILDOPTS VERBOSE=1 USE_BLAS64=0 SUITESPARSE_INC=-I$(brew --prefix suite-sparse-julia)/include FORCE_ASSERTIONS=1";
         BUILDOPTS="$BUILDOPTS LIBBLAS=-lopenblas LIBBLASNAME=libopenblas LIBLAPACK=-lopenblas LIBLAPACKNAME=libopenblas";
-        for lib in LLVM SUITESPARSE ARPACK BLAS FFTW LAPACK GMP MPFR PCRE LIBUNWIND; do
+        for lib in LLVM SUITESPARSE ARPACK BLAS LAPACK GMP MPFR PCRE LIBUNWIND; do
             BUILDOPTS="$BUILDOPTS USE_SYSTEM_$lib=1";
         done;
         export LDFLAGS="-L$(brew --prefix openblas-julia)/lib -L$(brew --prefix suite-sparse-julia)/lib";

DISTRIBUTING.md

@@ -12,9 +12,8 @@ separated most of the notes by OS.
 Note that while the code for Julia is
 [MIT-licensed, with a few exceptions](https://github.com/JuliaLang/julia/blob/master/LICENSE.md),
 the distribution created by the techniques described herein will be
-GPL licensed, as various dependent libraries such as `FFTW` and
-`SuiteSparse` are GPL licensed. We do hope to have a
-non-GPL distribution of Julia in the future.
+GPL licensed, as various dependent libraries such as `SuiteSparse` are
+GPL licensed. We do hope to have a non-GPL distribution of Julia in the future.
 
 Versioning and Git
 ------------------

LICENSE.md

@@ -56,7 +56,6 @@ their own licenses:
 - [OPENLIBM](https://github.com/JuliaLang/openlibm/blob/master/LICENSE.md) [MIT, BSD-2, ISC]
 - [OPENSPECFUN](https://github.com/JuliaLang/openspecfun) [MIT, public domain]
 - [FADDEEVA](http://ab-initio.mit.edu/Faddeeva) [MIT]
-- [FFTW](http://fftw.org/doc/License-and-Copyright.html) [GPL2+]
 - [GMP](http://gmplib.org/manual/Copying.html#Copying) [LGPL3+ or GPL2+]
 - [LIBGIT2](https://github.com/libgit2/libgit2/blob/development/COPYING) [GPL2+ with unlimited linking exception]
 - [CURL](https://curl.haxx.se/docs/copyright.html) [MIT/X derivative]

Make.inc

@@ -35,7 +35,6 @@ USE_SYSTEM_OPENSPECFUN:=0
 USE_SYSTEM_DSFMT:=0
 USE_SYSTEM_BLAS:=0
 USE_SYSTEM_LAPACK:=0
-USE_SYSTEM_FFTW:=0
 USE_SYSTEM_GMP:=0
 USE_SYSTEM_MPFR:=0
 USE_SYSTEM_ARPACK:=0
@@ -54,8 +53,6 @@ USE_LLVM_SHLIB := 1
 ## Settings for various Intel tools
 # Set to 1 to use MKL
 USE_INTEL_MKL ?= 0
-# Set to 1 to use MKL FFT
-USE_INTEL_MKL_FFT ?= 0
 # Set to 1 to use Intel LIBM
 USE_INTEL_LIBM ?= 0
 # Set to 1 to enable profiling with Intel VTune Amplifier
@@ -864,14 +861,6 @@ LIBLAPACKNAME := liblapack
 endif
 endif
 
-ifeq ($(OS), WINNT)
-LIBFFTWNAME := libfftw3
-LIBFFTWFNAME := libfftw3f
-else
-LIBFFTWNAME := libfftw3_threads
-LIBFFTWFNAME := libfftw3f_threads
-endif
-
 ifeq ($(USE_SYSTEM_LIBM), 1)
 LIBM := -lm
 LIBMNAME := libm
@@ -1059,12 +1048,6 @@ LIBBLAS   := $(MKL_LDFLAGS)
 LIBLAPACK := $(MKL_LDFLAGS)
 endif
 
-ifeq ($(USE_INTEL_MKL_FFT), 1)
-USE_SYSTEM_FFTW := 1
-LIBFFTWNAME := libmkl_rt
-LIBFFTWFNAME := libmkl_rt
-endif
-
 ifeq ($(HAVE_SSP),1)
 JCPPFLAGS += -DHAVE_SSP=1
 ifeq ($(USEGCC),1)

Makefile

@@ -246,11 +246,6 @@ JL_PRIVATE_LIBS := ccalltest
 ifeq ($(USE_GPL_LIBS), 1)
 JL_PRIVATE_LIBS += suitesparse_wrapper
 endif
-ifeq ($(USE_SYSTEM_FFTW),0)
-ifeq ($(USE_GPL_LIBS), 1)
-JL_PRIVATE_LIBS += fftw3 fftw3f fftw3_threads fftw3f_threads
-endif
-endif
 ifeq ($(USE_SYSTEM_PCRE),0)
 JL_PRIVATE_LIBS += pcre
 endif

README.arm.md

@@ -27,7 +27,6 @@ adding the following lines in `Make.user`:
 override USE_SYSTEM_BLAS=1
 override USE_SYSTEM_LAPACK=1
 override USE_SYSTEM_LIBM=1
-override USE_SYSTEM_FFTW=1
 override USE_SYSTEM_GMP=1
 override USE_SYSTEM_MPFR=1
 override USE_SYSTEM_ARPACK=1
@@ -36,7 +35,7 @@ override USE_SYSTEM_ARPACK=1
 The following command will install all the necessary libraries on Ubuntu:
 
 ````
-sudo apt-get install libblas3gf liblapack3gf libarpack2 libfftw3-dev libgmp3-dev \
+sudo apt-get install libblas3gf liblapack3gf libarpack2 libgmp3-dev \
                      libmpfr-dev libblas-dev liblapack-dev cmake gcc-4.8 \
                      g++-4.8 gfortran libgfortran3 m4 libedit-dev
 ````

README.md

@@ -295,7 +295,6 @@ Julia uses the following external libraries, which are automatically downloaded
 - **[AMOS]**                 — subroutines for computing Bessel and Airy functions.
 - **[SuiteSparse]** (>= 4.1) — library of linear algebra routines for sparse matrices.
 - **[ARPACK]**               — collection of subroutines designed to solve large, sparse eigenvalue problems.
-- **[FFTW]** (>= 3.3)        — library for computing fast Fourier transforms very quickly and efficiently.
 - **[PCRE]** (>= 10.00)      — Perl-compatible regular expressions library.
 - **[GMP]** (>= 5.0)         — GNU multiple precision arithmetic library, needed for `BigInt` support.
 - **[MPFR]** (>= 3.0)        — GNU multiple precision floating point library, needed for arbitrary precision floating point (`BigFloat`) support.
@@ -327,7 +326,6 @@ Julia uses the following external libraries, which are automatically downloaded
 [SuiteSparse]:  http://faculty.cse.tamu.edu/davis/suitesparse.html
 [AMOS]:         http://netlib.org/amos
 [ARPACK]:       http://forge.scilab.org/index.php/p/arpack-ng
-[FFTW]:         http://www.fftw.org
 [PCRE]:         http://www.pcre.org
 [LLVM]:         http://www.llvm.org
 [FemtoLisp]:    https://github.com/JeffBezanson/femtolisp
@@ -368,7 +366,6 @@ Add the following to the `Make.user` file:
     USEICC = 1
     USEIFC = 1
     USE_INTEL_MKL = 1
-    USE_INTEL_MKL_FFT = 1
     USE_INTEL_LIBM = 1
 
 It is highly recommended to start with a fresh clone of the Julia repository.

base/Makefile

@@ -53,8 +53,6 @@ ifeq ($(USE_GPL_LIBS), 1)
 else
 	@echo "const USE_GPL_LIBS = false" >> $@
 endif
-	@echo "const libfftw_name = \"$(LIBFFTWNAME)\"" >> $@
-	@echo "const libfftwf_name = \"$(LIBFFTWFNAME)\"" >> $@
 	@echo "const libllvm_version_string = \"$$($(LLVM_CONFIG_HOST) --version)\"" >> $@
 	@echo "const VERSION_STRING = \"$(JULIA_VERSION)\"" >> $@
 	@echo "const TAGGED_RELEASE_BANNER = \"$(TAGGED_RELEASE_BANNER)\"" >> $@

base/deprecated.jl

@@ -1434,6 +1434,57 @@ module Operators
 end
 export Operators
 
+# PR #21956
+# This mimics the structure as it was defined in Base to avoid directly breaking code
+# that assumes this structure
+module DFT
+    for f in [:bfft, :bfft!, :brfft, :dct, :dct!, :fft, :fft!, :fftshift, :idct, :idct!,
+              :ifft, :ifft!, :ifftshift, :irfft, :plan_bfft, :plan_bfft!, :plan_brfft,
+              :plan_dct, :plan_dct!, :plan_fft, :plan_fft!, :plan_idct, :plan_idct!,
+              :plan_ifft, :plan_ifft!, :plan_irfft, :plan_rfft, :rfft]
+        pkg = endswith(String(f), "shift") ? "AbstractFFTs" : "FFTW"
+        @eval begin
+            function $f(args...; kwargs...)
+                error($f, " has been moved to the package $pkg.jl.\n",
+                      "Run `Pkg.add(\"$pkg\")` to install $pkg then run `using $pkg` ",
+                      "to load it.")
+            end
+            export $f
+        end
+    end
+    module FFTW
+        for f in [:r2r, :r2r!, :plan_r2r, :plan_r2r!]
+            @eval begin
+                function $f(args...; kwargs...)
+                    error($f, " has been moved to the package FFTW.jl.\n",
+                          "Run `Pkg.add(\"FFTW\")` to install FFTW then run `using FFTW` ",
+                          "to load it.")
+                end
+                export $f
+            end
+        end
+    end
+    export FFTW
+end
+using .DFT
+for f in names(DFT)
+    @eval export $f
+end
+module DSP
+    for f in [:conv, :conv2, :deconv, :filt, :filt!, :xcorr]
+        @eval begin
+            function $f(args...; kwargs...)
+                error($f, " has been moved to the package DSP.jl.\n",
+                      "Run `Pkg.add(\"DSP\")` to install DSP then run `using DSP` ",
+                      "to load it.")
+            end
+            export $f
+        end
+    end
+end
+using .DSP
+export conv, conv2, deconv, filt, filt!, xcorr
+
 # END 0.7 deprecations
 
 # BEGIN 1.0 deprecations