FindFFT?[F] scripts can use a path provided in FFTWx[F]_ROOT_DIR environment variable...

[alexxy/gromacs.git] / cmake / FindFFTW3F.cmake

diff --git a/cmake/FindFFTW3F.cmake b/cmake/FindFFTW3F.cmake
index 23050153ad1d39f04a70c013b62b79601ab21c00..44824dade2a35d921e3991dbd3f2293708212b3b 100644 (file)
--- a/cmake/FindFFTW3F.cmake
+++ b/cmake/FindFFTW3F.cmake
@@ -4,23 +4,30 @@
 #  FFTW3F_INCLUDE_DIR    - where to find fftw3.h
 #  FFTW3F_LIBRARIES   - List of libraries when using FFTW.
 #  FFTW3F_FOUND       - True if FFTW found.
+#
+# The FFTW3F root installation directory can be provided in the FFTW3F_ROOT_DIR
 
 if (FFTW3F_INCLUDE_DIR AND FFTW3F_LIBRARIES)
   # Already in cache, be silent
   set (FFTW3F_FIND_QUIETLY TRUE)
 endif (FFTW3F_INCLUDE_DIR AND FFTW3F_LIBRARIES)
 
+file(TO_CMAKE_PATH "$ENV{FFTW3F_ROOT_DIR}" _env_FFTW3F_ROOT_DIR)
+
 find_path (FFTW3F_INCLUDE_DIR fftw3.h 
-       CACHE STRING "Path to headers for single precision FFTW3")
+            PATHS "${_env_FFTW3F_ROOT_DIR}/include"
+           CACHE STRING "Path to single precision FFTW3 headers")
 
 find_library (FFTW3F_LIBRARIES 
                NAMES fftw3f
-               PATHS "${FFTW3F_INCLUDE_DIR}/../lib"
+                PATHS "${_env_FFTW3F_ROOT_DIR}/lib"
+                      "${FFTW3F_INCLUDE_DIR}/../lib" 
                CACHE STRING "Single precision FFTW3 libraries")
 
 # handle the QUIETLY and REQUIRED arguments and set FFTW_FOUND to TRUE if
 # all listed variables are TRUE
 include (FindPackageHandleStandardArgs)
-find_package_handle_standard_args (FFTW3F DEFAULT_MSG FFTW3F_LIBRARIES FFTW3F_INCLUDE_DIR)
+set(__MSG "Could not find FFTW3F. Provide the fftw3 install directory in the FFTW3F_ROOT_DIR environment variable.")
+find_package_handle_standard_args (FFTW3F ${__MSG} FFTW3F_LIBRARIES FFTW3F_INCLUDE_DIR)
 
 mark_as_advanced (FFTW3F_LIBRARIES FFTW3F_INCLUDE_DIR)