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[fftw3] use proper CMake target and move builtin-build to subdir #22423

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[fftw3] use proper CMake target and move builtin-build to subdir #22423

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1 change: 1 addition & 0 deletions .github/workflows/root-ci-config/buildconfig/alma10-clang_ninja.txt
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
CMAKE_C_COMPILER=clang
CMAKE_CXX_COMPILER=clang++
CMAKE_GENERATOR=Ninja
builtin_fftw3=ON
builtin_freetype=ON
builtin_ftgl=ON
builtin_gif=ON
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30 changes: 30 additions & 0 deletions builtins/fftw3/CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
set(ROOT_FFTW_VERSION 3.3.10)
message(STATUS "Downloading and building FFTW version ${ROOT_FFTW_VERSION}")
set(ROOT_FFTW_PREFIX ${CMAKE_BINARY_DIR}/builtins/FFTW3-prefix)
set(ROOT_FFTW_LIBRARY ${ROOT_FFTW_PREFIX}/lib/libfftw3.a)
ExternalProject_Add(
BUILTIN_FFTW3
PREFIX ${ROOT_FFTW_PREFIX}
URL ${lcgpackages}/fftw-${ROOT_FFTW_VERSION}.tar.gz
URL_HASH SHA256=56c932549852cddcfafdab3820b0200c7742675be92179e59e6215b340e26467
CONFIGURE_COMMAND ./configure --prefix=<INSTALL_DIR>
BUILD_COMMAND make CFLAGS=-fPIC
LOG_DOWNLOAD 1 LOG_CONFIGURE 1 LOG_BUILD 1 LOG_INSTALL 1 LOG_OUTPUT_ON_FAILURE 1
BUILD_IN_SOURCE 1
BUILD_BYPRODUCTS ${ROOT_FFTW_LIBRARY}
TIMEOUT 600
)

set(ROOT_FFTW_INCLUDE_DIR ${ROOT_FFTW_PREFIX}/include)

file(MAKE_DIRECTORY ${ROOT_FFTW_INCLUDE_DIR})
add_library(FFTW::Double IMPORTED STATIC GLOBAL)
add_dependencies(FFTW::Double BUILTIN_FFTW3)
set_target_properties(FFTW::Double PROPERTIES
IMPORTED_LOCATION ${ROOT_FFTW_LIBRARY}
INTERFACE_INCLUDE_DIRECTORIES ${ROOT_FFTW_INCLUDE_DIR})

set(FFTW_INCLUDE_DIRS ${ROOT_FFTW_INCLUDE_DIR} PARENT_SCOPE)
set(FFTW_FOUND ON PARENT_SCOPE)
set(FFTW_VERSION ${ROOT_FFTW_VERSION} PARENT_SCOPE)
set(FFTW_LIBRARIES ${ROOT_FFTW_LIBRARY} PARENT_SCOPE)
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