Fix compilation when compiling on Windows

FFTW3Config.cmake.in

@@ -1,17 +1,17 @@
-# defined since 2.8.3
-if (CMAKE_VERSION VERSION_LESS 2.8.3)
-  get_filename_component (CMAKE_CURRENT_LIST_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
-endif ()
-
-# Allows loading FFTW3 settings from another project
-set (FFTW3_CONFIG_FILE "${CMAKE_CURRENT_LIST_FILE}")
-
-set (FFTW3@PREC_SUFFIX@_LIBRARIES fftw3@PREC_SUFFIX@)
-set (FFTW3@PREC_SUFFIX@_LIBRARY_DIRS @CMAKE_INSTALL_FULL_LIBDIR@)
-set (FFTW3@PREC_SUFFIX@_INCLUDE_DIRS @CMAKE_INSTALL_FULL_INCLUDEDIR@)
-
-include ("${CMAKE_CURRENT_LIST_DIR}/FFTW3LibraryDepends.cmake")
-
-if (CMAKE_VERSION VERSION_LESS 2.8.3)
-  set (CMAKE_CURRENT_LIST_DIR)
-endif ()
+get_filename_component(@PROJECT_NAME@@PREC_SUFFIX@_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+include(CMakeFindDependencyMacro)
+
+set(ENABLE_OPENMP @ENABLE_OPENMP@)
+set(ENABLE_THREADS @ENABLE_THREADS@)
+
+if(${ENABLE_OPENMP})
+    find_dependency(OpenMP REQUIRED)
+endif()
+if(${ENABLE_THREADS})
+    find_dependency(Threads REQUIRED)
+endif()
+
+if(NOT TARGET @PROJECT_NAME@@PREC_SUFFIX@::fftw3@PREC_SUFFIX@)
+    include("${@PROJECT_NAME@@PREC_SUFFIX@_CMAKE_DIR}/@PROJECT_NAME@@[email protected]")
+endif()
+ 

api/CMakeLists.txt

@@ -0,0 +1,83 @@
+target_sources(${fftw3_lib}
+  PUBLIC
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/fftw3.h>
+  PRIVATE
+    api.h
+    f77funcs.h
+    guru.h
+    guru64.h
+    mktensor-iodims.h
+    plan-guru-dft-c2r.h
+    plan-guru-dft-r2c.h
+    plan-guru-dft.h
+    plan-guru-r2r.h
+    plan-guru-split-dft-c2r.h
+    plan-guru-split-dft-r2c.h
+    plan-guru-split-dft.h
+    x77.h
+    apiplan.c
+    configure.c
+    execute-dft-c2r.c
+    execute-dft-r2c.c
+    execute-dft.c
+    execute-r2r.c
+    execute-split-dft-c2r.c
+    execute-split-dft-r2c.c
+    execute-split-dft.c
+    execute.c
+    export-wisdom-to-file.c
+    export-wisdom-to-string.c
+    export-wisdom.c
+    f77api.c
+    flops.c
+    forget-wisdom.c
+    import-system-wisdom.c
+    import-wisdom-from-file.c
+    import-wisdom-from-string.c
+    import-wisdom.c
+    malloc.c
+    map-r2r-kind.c
+    mapflags.c
+    mkprinter-file.c
+    mkprinter-str.c
+    mktensor-iodims.c
+    mktensor-iodims64.c
+    mktensor-rowmajor.c
+    plan-dft-1d.c
+    plan-dft-2d.c
+    plan-dft-3d.c
+    plan-dft-c2r-1d.c
+    plan-dft-c2r-2d.c
+    plan-dft-c2r-3d.c
+    plan-dft-c2r.c
+    plan-dft-r2c-1d.c
+    plan-dft-r2c-2d.c
+    plan-dft-r2c-3d.c
+    plan-dft-r2c.c
+    plan-dft.c
+    plan-guru-dft-c2r.c
+    plan-guru-dft-r2c.c
+    plan-guru-dft.c
+    plan-guru-r2r.c
+    plan-guru-split-dft-c2r.c
+    plan-guru-split-dft-r2c.c
+    plan-guru-split-dft.c
+    plan-guru64-dft-c2r.c
+    plan-guru64-dft-r2c.c
+    plan-guru64-dft.c
+    plan-guru64-r2r.c
+    plan-guru64-split-dft-c2r.c
+    plan-guru64-split-dft-r2c.c
+    plan-guru64-split-dft.c
+    plan-many-dft-c2r.c
+    plan-many-dft-r2c.c
+    plan-many-dft.c
+    plan-many-r2r.c
+    plan-r2r-1d.c
+    plan-r2r-2d.c
+    plan-r2r-3d.c
+    plan-r2r.c
+    print-plan.c
+    rdft2-pad.c
+    the-planner.c
+    version.c)

api/api.h

@@ -22,28 +22,6 @@
 #ifndef __API_H__
 #define __API_H__
 
-#ifndef CALLING_FFTW /* defined in hook.c, when calling internal functions */
-#  define COMPILING_FFTW /* used for DLL symbol exporting in fftw3.h */
-#endif
-
-/* When compiling with GNU libtool on Windows, DLL_EXPORT is #defined
-   for compiling the shared-library code.  In this case, we'll #define
-   FFTW_DLL to add dllexport attributes to the specified functions in
-   fftw3.h.
-
-   If we don't specify dllexport explicitly, then libtool
-   automatically exports all symbols.  However, if we specify
-   dllexport explicitly for any functions, then libtool apparently
-   doesn't do any automatic exporting.  (Not documented, grrr, but
-   this is the observed behavior with libtool 1.5.8.)  Thus, using
-   this forces us to correctly dllexport every exported symbol, or
-   linking bench.exe will fail.  This has the advantage of forcing
-   us to mark things correctly, which is necessary for other compilers
-   (such as MS VC++). */
-#ifdef DLL_EXPORT
-#  define FFTW_DLL
-#endif
-
 /* just in case: force <fftw3.h> not to use C99 complex numbers
    (we need this for IBM xlc because _Complex_I is treated specially
    and is defined even if <complex.h> is not included) */
@@ -90,14 +68,14 @@ int X(guru_kosherp)(int rank, const X(iodim) *dims,
 int X(guru64_kosherp)(int rank, const X(iodim64) *dims,
 		    int howmany_rank, const X(iodim64) *howmany_dims);
 
-/* Note: FFTW_EXTERN is used for "internal" functions used in tests/hook.c */
+/* Note: extern is used for "internal" functions used in tests/hook.c */
 
-FFTW_EXTERN printer *X(mkprinter_file)(FILE *f);
+FFTW3_EXPORT printer *X(mkprinter_file)(FILE *f);
 
 printer *X(mkprinter_cnt)(size_t *cnt);
 printer *X(mkprinter_str)(char *s);
 
-FFTW_EXTERN planner *X(the_planner)(void);
+FFTW3_EXPORT planner *X(the_planner)(void);
 void X(configure_planner)(planner *plnr);
 
 void X(mapflags)(planner *, unsigned);
@@ -108,7 +86,7 @@ rdft_kind *X(map_r2r_kind)(int rank, const X(r2r_kind) * kind);
 
 typedef void (*planner_hook_t)(void);
 
-void X(set_planner_hooks)(planner_hook_t before, planner_hook_t after);
+void EXPORT_ADDITIONAL_FUNCTIONS X(set_planner_hooks)(planner_hook_t before, planner_hook_t after);
 
 #ifdef __cplusplus
 }  /* extern "C" */