Split FFTW3 into double and float versions for ROOT and O2

ROOT requires libfftw3, but O2 requires libfftw3f.

Also, make sure that ROOT actually finds libfftw3 and doesn't just disable the
feature we request.

fftw3.sh

@@ -9,38 +9,9 @@ build_requires:
   - "GCC-Toolchain:(?!osx)"
 ---
 #!/bin/bash -e
-export FFTW3_WITH_AVX # use AVX with float or double. Unset automatically for long double and quad
-
-if [[ $FFTW3_DOUBLE == "ON" ]]; then # ensure only one option is set and AVX is disabled if necessary
-  FFTW3_FLOAT="OFF"
-  FFTW3_LONG_DOUBLE="OFF"
-elif [[ $FFTW3_LONG_DOUBLE == "ON" ]]; then
-  unset FFTW3_WITH_AVX
-  FFTW3_FLOAT="OFF"
-  FFTW3_DOUBLE="OFF"
-else # keep FLOAT default option as it was
-  FFTW3_FLOAT="ON"
-  FFTW3_DOUBLE="OFF"
-  FFTW3_LONG_DOUBLE="OFF"
-fi
-
-case $ARCHITECTURE in
-    osx_arm64)
-  cmake $SOURCEDIR                                          \
-        -DCMAKE_INSTALL_PREFIX:PATH="${INSTALLROOT}"        \
-        -DCMAKE_INSTALL_LIBDIR:PATH="lib"                   \
-        -DENABLE_LONG_DOUBLE=${FFTW3_LONG_DOUBLE-OFF}       \
-        -DENABLE_FLOAT=${FFTW3_FLOAT-OFF}
-  ;;
-    *)
-  cmake $SOURCEDIR                                          \
-        -DCMAKE_INSTALL_PREFIX:PATH="${INSTALLROOT}"        \
-        -DCMAKE_INSTALL_LIBDIR:PATH="lib"                   \
-        -DENABLE_LONG_DOUBLE=${FFTW3_LONG_DOUBLE-OFF}       \
-        -DENABLE_FLOAT=${FFTW3_FLOAT-OFF}                   \
-        ${FFTW3_WITH_AVX:+-DENABLE_AVX=ON}
-  ;;
-esac
+cmake "$SOURCEDIR"                                      \
+      -DCMAKE_INSTALL_PREFIX:PATH="$INSTALLROOT"        \
+      -DCMAKE_INSTALL_LIBDIR:PATH=lib
 
 make ${JOBS+-j $JOBS}
 make install
@@ -49,4 +20,4 @@ make install
 MODULEDIR="$INSTALLROOT/etc/modulefiles"
 MODULEFILE="$MODULEDIR/$PKGNAME"
 mkdir -p "$MODULEDIR"
-alibuild-generate-module --bin --lib > $MODULEFILE
+alibuild-generate-module --bin --lib > "$MODULEFILE"

fftw3f.sh

@@ -0,0 +1,24 @@
+package: FFTW3F
+version: "%(tag_basename)s"
+tag: v3.3.9
+source: https://github.com/alisw/fftw3
+prefer_system: (?!slc5.*)
+build_requires:
+  - alibuild-recipe-tools
+  - CMake
+  - "GCC-Toolchain:(?!osx)"
+---
+#!/bin/bash -e
+cmake "$SOURCEDIR"                                      \
+      -DCMAKE_INSTALL_PREFIX:PATH="$INSTALLROOT"        \
+      -DCMAKE_INSTALL_LIBDIR:PATH=lib                   \
+      -DENABLE_FLOAT=ON
+
+make ${JOBS+-j $JOBS}
+make install
+
+#Modulefile
+MODULEDIR="$INSTALLROOT/etc/modulefiles"
+MODULEFILE="$MODULEDIR/$PKGNAME"
+mkdir -p "$MODULEDIR"
+alibuild-generate-module --bin --lib > "$MODULEFILE"

o2.sh

@@ -23,7 +23,7 @@ requires:
   - libjalienO2
   - cgal
   - VecGeom
-  - FFTW3
+  - FFTW3F
   - ONNXRuntime
   - MLModels
   - KFParticle
@@ -256,7 +256,7 @@ module load BASE/1.0 \\
             ${LIBJALIENO2_REVISION:+libjalienO2/$LIBJALIENO2_VERSION-$LIBJALIENO2_REVISION}         \\
             ${CURL_REVISION:+curl/$CURL_VERSION-$CURL_REVISION}                                     \\
             ${FAIRMQ_REVISION:+FairMQ/$FAIRMQ_VERSION-$FAIRMQ_REVISION}                             \\
-            ${FFTW3_REVISION:+FFTW3/$FFTW3_VERSION-$FFTW3_REVISION}                                 \\
+            ${FFTW3F_REVISION:+FFTW3F/$FFTW3F_VERSION-$FFTW3F_REVISION}                             \\
             ${ONNXRUNTIME_REVISION:+ONNXRuntime/$ONNXRUNTIME_VERSION-$ONNXRUNTIME_REVISION}         \\
             ${RAPIDJSON_REVISION:+RapidJSON/$RAPIDJSON_VERSION-$RAPIDJSON_REVISION}                 \\
             ${MLMODELS_REVISION:+MLModels/$MLMODELS_VERSION-$MLMODELS_REVISION}

root.sh

@@ -184,6 +184,10 @@ cmake $SOURCEDIR
 
 cmake --build . --target install ${JOBS+-j $JOBS}
 
+# Make sure ROOT actually found its build dependencies and didn't disable
+# features we requested. "-Dfail-on-missing=ON" would probably be better.
+[ "$("$INSTALLROOT/bin/root-config" --has-fftw3)" = yes ]
+
 # Add support for ROOT_PLUGIN_PATH envvar for specifying additional plugin search paths
 grep -v '^Unix.*.Root.PluginPath' $INSTALLROOT/etc/system.rootrc > system.rootrc.0
 cat >> system.rootrc.0 <<\EOF