Add patches to help fftw static build

Signed-off-by: falkTX <falktx@falktx.com>

patches/fftw/01_static-planner-thread-safe.patch

@@ -0,0 +1,25 @@
+--- fftw3-static-3.3.5~git20160520.orig/api/apiplan.c
++++ fftw3-static-3.3.5~git20160520/api/apiplan.c
+@@ -19,8 +19,21 @@
+  */
+ 
+ #include "api/api.h"
++#include <pthread.h>
+ 
+-static planner_hook_t before_planner_hook = 0, after_planner_hook = 0;
++static pthread_mutex_t planner_mutex = PTHREAD_MUTEX_INITIALIZER;
++
++static void lock_planner_mutex(void)
++{
++     pthread_mutex_lock(&planner_mutex);
++}
++
++static void unlock_planner_mutex(void)
++{
++     pthread_mutex_unlock(&planner_mutex);
++}
++
++static planner_hook_t before_planner_hook = lock_planner_mutex, after_planner_hook = unlock_planner_mutex;
+ 
+ void X(set_planner_hooks)(planner_hook_t before, planner_hook_t after)
+ {

patches/fftw/02_force-pthread-libs.patch

@@ -0,0 +1,10 @@
+--- fftw3-static-3.3.5~git20160520.orig/fftw.pc.in
++++ fftw3-static-3.3.5~git20160520/fftw.pc.in
+@@ -6,6 +6,6 @@ includedir=@includedir@
+ Name: FFTW
+ Description: fast Fourier transform library
+ Version: @VERSION@
+-Libs: -L${libdir} -lfftw3@PREC_SUFFIX@ @LIBQUADMATH@
++Libs: -L${libdir} -lfftw3@PREC_SUFFIX@ @LIBQUADMATH@ -lpthread -lm
+ Libs.private: -lm
+ Cflags: -I${includedir}

patches/fftw/03_assume-neon-is-present.patch

@@ -0,0 +1,59 @@
+diff --git a/simd-support/neon.c b/simd-support/neon.c
+index 196959c..fe04dd4 100644
+--- a/simd-support/neon.c
++++ b/simd-support/neon.c
+@@ -23,54 +23,9 @@
+ 
+ #if HAVE_NEON
+ 
+-/* check for an environment where signals are known to work */
+-#if defined(unix) || defined(linux)
+-  # include <signal.h>
+-  # include <setjmp.h>
+-
+-  static jmp_buf jb;
+-
+-  static void sighandler(int x)
+-  {
+-       UNUSED(x);
+-       longjmp(jb, 1);
+-  }
+-
+-  static int really_have_neon(void)
+-  {
+-       void (*oldsig)(int);
+-       oldsig = signal(SIGILL, sighandler);
+-       if (setjmp(jb)) {
+-	    signal(SIGILL, oldsig);
+-	    return 0;
+-       } else {
+-	    /* paranoia: encode the instruction in binary because the
+-	       assembler may not recognize it without -mfpu=neon */
+-	    /*asm volatile ("vand q0, q0, q0");*/
+-	    asm volatile (".long 0xf2000150");
+-	    signal(SIGILL, oldsig);
+-	    return 1;
+-       }
+-  }
+-
+-  int X(have_simd_neon)(void)
+-  {
+-       static int init = 0, res;
+-
+-       if (!init) {
+-	    res = really_have_neon();
+-	    init = 1;
+-       }
+-       return res;
+-  }
+-
+-
+-#else
+-/* don't know how to autodetect NEON; assume it is present */
+   int X(have_simd_neon)(void)
+   {
+        return 1;
+   }
+-#endif
+ 
+ #endif

patches/fftwf

@@ -0,0 +1 @@
+fftw