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Find the version of FFTW and check for minim required #8

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Find the version of FFTW and check for minim required #8

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32 changes: 31 additions & 1 deletion FindFFTW.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -7,14 +7,15 @@
# Copyright (c) 2017, Patrick Bos
#
# Usage:
# find_package(FFTW [REQUIRED] [QUIET] [COMPONENTS component1 ... componentX] )
# find_package(FFTW [version] [REQUIRED] [QUIET] [COMPONENTS component1 ... componentX] )
#
# It sets the following variables:
# FFTW_FOUND ... true if fftw is found on the system
# FFTW_[component]_LIB_FOUND ... true if the component is found on the system (see components below)
# FFTW_LIBRARIES ... full paths to all found fftw libraries
# FFTW_[component]_LIB ... full path to one of the components (see below)
# FFTW_INCLUDE_DIRS ... fftw include directory paths
# FFTW_VERSION ... fftw version found
#
# The following variables will be checked by the function
# FFTW_USE_STATIC_LIBS ... if true, only static libraries are found, otherwise both static and shared.
Expand Down Expand Up @@ -394,10 +395,38 @@ endif()

set( CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES_SAV} )

# Deduce the version
execute_process(COMMAND fftw-wisdom-to-conf -V
RESULT_VARIABLE success
OUTPUT_VARIABLE stdout
ERROR_VARIABLE stderr)
if (success EQUAL 0)
string(REGEX MATCH "FFTW *version *([0-9]+([.][0-9]+([.][0-9]+)?)?)"
_version ${stdout}
)
string(REPLACE " " ";" _version_list ${_version})
list(GET _version_list -1 FFTW_VERSION)
set(_version_list)
set(_version)
else()
message("Error running fftw-wisdom-to-conf. Could not determine FFTW version
Output:
${stdout}

Error:
${stderr}
")
set(FFTW_VERSION)
endif()
set(stdout)
set(stderr)
set(success)

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(FFTW
REQUIRED_VARS FFTW_INCLUDE_DIRS
VERSION_VAR FFTW_VERSION
HANDLE_COMPONENTS
)

Expand All @@ -416,4 +445,5 @@ mark_as_advanced(
FFTW_FLOAT_MPI_LIB
FFTW_DOUBLE_MPI_LIB
FFTW_LONGDOUBLE_MPI_LIB
FFTW_VERSION
)
3 changes: 2 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ CMake module for finding FFTW 3 using find_package
Once added to your project, this module allows you to find FFTW libraries and headers using the CMake `find_package` command:

```cmake
find_package(FFTW [REQUIRED] [QUIET] [COMPONENTS component1 ... componentX] )
find_package(FFTW [version] [REQUIRED] [QUIET] [COMPONENTS component1 ... componentX] )
```

This module sets the following variables:
Expand All @@ -14,6 +14,7 @@ This module sets the following variables:
- `FFTW_LIBRARIES` ... full paths to all found fftw libraries
- `FFTW_[component]_LIB` ... full path to one of the components (see below)
- `FFTW_INCLUDE_DIRS` ... fftw include directory paths
- FFTW_VERSION ... fftw version found

The following variables will be checked by the module:
- `FFTW_USE_STATIC_LIBS` ... if true, only static libraries are found, otherwise both static and shared.
Expand Down