From a44fd411b55c773f6b251c54b96a8f8d9de4fc75 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 27 Oct 2014 20:08:04 +0100
Subject: Refactor autoconf, make FFTW default

---
 configure.ac | 68 +++++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 42 insertions(+), 26 deletions(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 9a1816a..9826a91 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,56 +48,74 @@ AC_PROG_MKDIR_P
 
 EXTRA=""
 AC_ARG_ENABLE([debug],
-        [AS_HELP_STRING([--disable-debug], [Disable debugger symbols])],
-        [], [enable_debug=yes])
+        [AS_HELP_STRING([--enable-debug], [Enable debugger symbols])],
+        [], [enable_debug=no])
 AC_ARG_ENABLE([prof],
         [AS_HELP_STRING([--enable-prof], [Enable profiling])],
         [], [enable_prof=no])
 AC_ARG_WITH([debug-malloc],
-        [AS_HELP_STRING([--with-debug-malloc[=yes|no|duma|efence|...]],
+        [AS_HELP_STRING([--with-debug-malloc[=no|yes|duma|efence|...]],
             [Add malloc debugger support])],
-        [], [with_debug_malloc=yes])
+        [], [with_debug_malloc=no])
 AC_ARG_ENABLE([trace],
         [AS_HELP_STRING([--enable-trace], [Enable trace output])],
         [], [enable_trace=no])
+
+# Which FFT library to use
 AC_ARG_ENABLE([fft_simd],
-        [AS_HELP_STRING([--enable-fft-simd], [Enable SIMD instructions for kiss-fft (unstable)])],
+        [AS_HELP_STRING([--enable-fft-simd],
+                        [Enable SIMD instructions for kiss-fft (unstable)])],
         [], [enable_fft_simd=no])
-AC_ARG_ENABLE([fftw],
-        [AS_HELP_STRING([--enable-fftw], [Use FFTW3 instead of Kiss FFT])],
-        [], [enable_fftw=no])
+AC_ARG_ENABLE([kiss_fft],
+        [AS_HELP_STRING([--enable-kiss-fft], [Prefer KISS FFT over FFTW3])],
+        [], [enable_kiss=no])
+
 # ZeroMQ message queue input
 AC_ARG_ENABLE([input_zeromq],
         AS_HELP_STRING([--enable-input-zeromq], [Enable ZeroMQ input]))
+
 # UHD support control
 AC_ARG_ENABLE([output_uhd],
         [AS_HELP_STRING([--enable-output-uhd], [Enable UHD output])],
         [], [enable_output_uhd=yes])
 
+AS_IF([test "x$enable_kiss" = "xno"],
+      [PKG_CHECK_MODULES([FFTW], [fftw3f], enable_fftw=yes, enable_fftw=no)],
+      [enable_fftw=no])
+
+AS_IF([test "x$enable_fftw" = "xyes"],
+      AC_MSG_NOTICE([Found FFTW3]),
+      AC_MSG_NOTICE([Using Kiss FFT]) )
+
+echo "Checking input zeromq"
+
 AS_IF([test "x$enable_input_zeromq" = "xyes"],
         [AC_DEFINE(HAVE_INPUT_ZEROMQ, [1], [Define if ZeroMQ input is enabled]) ,
          AC_CHECK_LIB(zmq, zmq_init, ,[AC_MSG_ERROR([ZeroMQ libzmq is required])])])
 AS_IF([test "x$enable_debug" = "xno"],
         [OPTIM="-O2" DEBUG="" EXTRA="$EXTRA -DNDEBUG"],
-        [OPTIM="-O0" DEBUG="-ggdb" EXTRA="$EXTRA -Wall"])
+        [OPTIM="-O0" DEBUG="-ggdb" EXTRA="$EXTRA"])
 AS_IF([test "x$enable_prof" != "xno"],
         [EXTRA="$EXTRA -pg"])
-AS_IF([test "x$enable_trace" != "xno"],
-        [EXTRA="$EXTRA -DDEBUG"])
-AS_IF([test "x$enable_fft_simd" != "xno"],
-        [EXTRA="$EXTRA -DUSE_SIMD"])
-AS_IF([test "x$enable_fftw" != "xno"],
-        [EXTRA="$EXTRA -DUSE_FFTW"])
 
+# Define conditionals for Makefile.am
 AM_CONDITIONAL([USE_KISS_FFT], [test "x$enable_fftw" = "xno"])
-
+AM_CONDITIONAL([DEBUG], [test "x$enable_trace" = "xyes"])
 AM_CONDITIONAL([HAVE_INPUT_ZEROMQ_TEST], [test "x$enable_input_zeromq" = "xyes"])
+AM_CONDITIONAL([IS_GIT_REPO], [test -d '.git'])
 
+# Defines for config.h
+AS_IF([test "x$enable_fft_simd" = "xyes"],
+      [AC_DEFINE(USE_SIMD, [1], [Define to enable KISS FFT SIMD])])
+AS_IF([test "x$enable_fftw" = "xno"],
+      [AC_DEFINE(USE_KISS_FFT, [1], [Define to enable KISS])])
+AS_IF([test "x$enable_fftw" = "xyes"],
+      [AC_DEFINE(USE_FFTW, [1], [Define to enable FFTW])])
 
-AC_SUBST([CFLAGS], ["$OPTIM $DEBUG $EXTRA"])
-AC_SUBST([CXXFLAGS], ["$OPTIM $DEBUG $EXTRA"])
+AC_SUBST([CFLAGS], ["$OPTIM $DEBUG $EXTRA $FFTW_CFLAGS"])
+AC_SUBST([CXXFLAGS], ["$OPTIM $DEBUG $EXTRA $FFTW_LIBS"])
 
-# Checks for libraries.
+# Checks for UHD.
 AS_IF([test "x$enable_output_uhd" = "xyes"],
         [AC_DEFINE(HAVE_OUTPUT_UHD, [1], [Define if UHD output is enabled]) ,
          AC_CHECK_LIB([uhd], [main], [], [AC_MSG_ERROR([library uhd is missing])])])
@@ -110,11 +128,8 @@ AC_CHECK_LIB([boost_thread], [main], [], [AC_MSG_ERROR([library boost_thread is
 
 AC_CHECK_LIB([rt], [clock_gettime], [], [AC_MSG_ERROR([library rt is missing])])
 
-AS_IF([test "x$enable_fftw" != "xno"],
-    [AC_CHECK_LIB([fftw3f], [fftw_execute],
-        AC_MSG_NOTICE([Found FFTW3]),
-        AC_MSG_NOTICE([Failed to find FFTW3]) )] )
-
+# Tests for different memory allocation debuggers.
+# Valgrind doesn't need any.
 AS_IF([test "x$enable_debug" != "xno"],
         [AS_IF([test "x$with_debug_malloc" != "xno"],
             [AS_IF([test "x$with_debug_malloc" = "xyes"],
@@ -145,6 +160,7 @@ AC_COMPILE_IFELSE(
         [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_DEFINE([M_PIl], [M_PI], [Replacing define])])
 AC_LANG_POP([C++])
 
+
 # Check for SSE
 AC_MSG_CHECKING(for SSE in current arch/CFLAGS)
 AC_LINK_IFELSE([
@@ -165,7 +181,7 @@ AC_MSG_RESULT($has_sse)
 
 AM_CONDITIONAL([HAVE_SSE], [test "x$has_sse" = "xyes"])
 
-AM_CONDITIONAL([IS_GIT_REPO], [test -d '.git'])
+# TODO: Check for NEON
 
 AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([bzero floor ftime gettimeofday memset sqrt strchr strerror strtol])
@@ -197,7 +213,7 @@ disabled=""
 for feat in with_debug_malloc has_sse
 do
     eval var=\$$feat
-    AS_IF([test "x$var" = "xyes"],
+    AS_IF([test "x$var" != "xno"],
           [enabled="$enabled $feat"],
           [disabled="$disabled $feat"])
 done
-- 
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