Browse Source

add autotools based build system

Dimitri Stolnikov 8 years ago
parent
commit
001bfb96ef
18 changed files with 2340 additions and 17 deletions
  1. 2 0
      AUTHORS
  2. 339 0
      COPYING
  3. 1716 0
      Doxyfile.in
  4. 43 0
      Makefile.am
  5. 1 1
      README
  6. 50 0
      configure.ac
  7. 151 0
      git-version-gen
  8. 5 0
      include/Makefile.am
  9. 0 0
      include/i2c.h
  10. 0 0
      include/rtl-sdr.h
  11. 0 0
      include/tuner_e4000.h
  12. 0 0
      include/tuner_fc0013.h
  13. 10 0
      librtlsdr.pc.in
  14. 2 0
      m4/.gitignore
  15. 0 10
      src/Makefile
  16. 15 0
      src/Makefile.am
  17. 2 2
      src/main.c
  18. 4 4
      src/rtl-sdr.c

+ 2 - 0
AUTHORS

@@ -0,0 +1,2 @@
+Steve Markgraf <steve@steve-m.de>
+Dimitri Stolnikov <horiz0n@gmx.net>

+ 339 - 0
COPYING

@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
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+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
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+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
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+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
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+a storage or distribution medium does not bring the other work under
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+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
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+    a) Accompany it with the complete corresponding machine-readable
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+
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+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
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+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+License and any other pertinent obligations, then as a consequence you
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+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
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+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
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+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
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+to distribute software through any other system and a licensee cannot
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+
+This section is intended to make thoroughly clear what is believed to
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+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
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+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
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+
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+later version", you have the option of following the terms and conditions
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+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
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+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

File diff suppressed because it is too large
+ 1716 - 0
Doxyfile.in


+ 43 - 0
Makefile.am

@@ -0,0 +1,43 @@
+AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
+ACLOCAL_AMFLAGS = -I m4
+
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+SUBDIRS = include src
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = librtlsdr.pc
+
+BUILT_SOURCES = $(top_srcdir)/.version
+$(top_srcdir)/.version:
+	echo $(VERSION) > $@-t && mv $@-t $@
+dist-hook:
+	echo $(VERSION) > $(distdir)/.tarball-version
+
+EXTRA_DIST = git-version-gen
+
+if HAVE_DOXYGEN
+
+pkgdocdir=$(docdir)/$(PACKAGE)-$(VERSION)
+doc_htmldir=$(pkgdocdir)/html
+
+doc_html_DATA = $(top_builddir)/doc/html.tar
+
+$(doc_html_DATA): $(top_builddir)/doc/html/index.html
+	cd $(top_builddir)/doc && tar cf html.tar html
+
+$(top_builddir)/doc/html/index.html: $(SOURCES) Doxyfile
+	@rm -rf doc
+	mkdir -p doc
+	$(DOXYGEN) Doxyfile
+
+install-data-hook:
+	cd $(DESTDIR)$(doc_htmldir) && tar xf html.tar --strip-components 1 && rm -f html.tar
+
+uninstall-hook:
+	cd $(DESTDIR) && rm -rf $(doc_htmldir)
+
+DX_CLEAN = doc/{html,latex}/* doc/html.tar
+
+endif
+
+MOSTLYCLEANFILES = $(DX_CLEAN)

+ 1 - 1
README

@@ -1,5 +1,5 @@
 rtl-sdr
-Software to turn the Realtek RTL2832U into a SDR
+Software to turn Realtek RTL2832U based DVB-T receivers into SDR
 ======================================================================
 
 For more information see:

+ 50 - 0
configure.ac

@@ -0,0 +1,50 @@
+AC_INIT([librtlsdr],
+        m4_esyscmd([./git-version-gen .tarball-version]),
+        [osmosdr@lists.osmocom.org])
+
+AM_INIT_AUTOMAKE([dist-bzip2])
+
+dnl kernel style compile messages
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
+dnl checks for programs
+AC_PROG_MAKE_SET
+AC_PROG_CC
+AC_PROG_INSTALL
+LT_INIT
+AC_PROG_LIBTOOL
+
+PKG_CHECK_MODULES(LIBUSB, libusb-1.0 >= 1.0)
+LIBS="$LIBS $LIBUSB_LIBS"
+CFLAGS="$CFLAGS $LIBUSB_CFLAGS"
+
+AC_PATH_PROG(DOXYGEN,doxygen,false)
+AM_CONDITIONAL(HAVE_DOXYGEN, test $DOXYGEN != false)
+
+AC_CONFIG_MACRO_DIR([m4])
+
+dnl checks for header files
+AC_HEADER_STDC
+AC_CHECK_HEADERS(sys/types.h)
+
+# The following test is taken from WebKit's webkit.m4
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fvisibility=hidden "
+AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])],
+    [ AC_MSG_RESULT([yes])
+      SYMBOL_VISIBILITY="-fvisibility=hidden"],
+      AC_MSG_RESULT([no]))
+CFLAGS="$saved_CFLAGS"
+AC_SUBST(SYMBOL_VISIBILITY)
+
+dnl Generate the output
+AM_CONFIG_HEADER(config.h)
+
+AC_OUTPUT(
+	librtlsdr.pc
+	include/Makefile
+	src/Makefile
+	Makefile
+	Doxyfile
+)

+ 151 - 0
git-version-gen

@@ -0,0 +1,151 @@
+#!/bin/sh
+# Print a version string.
+scriptversion=2010-01-28.01
+
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
+# It may be run two ways:
+# - from a git repository in which the "git describe" command below
+#   produces useful output (thus requiring at least one signed tag)
+# - from a non-git-repo directory containing a .tarball-version file, which
+#   presumes this script is invoked like "./git-version-gen .tarball-version".
+
+# In order to use intra-version strings in your project, you will need two
+# separate generated version string files:
+#
+# .tarball-version - present only in a distribution tarball, and not in
+#   a checked-out repository.  Created with contents that were learned at
+#   the last time autoconf was run, and used by git-version-gen.  Must not
+#   be present in either $(srcdir) or $(builddir) for git-version-gen to
+#   give accurate answers during normal development with a checked out tree,
+#   but must be present in a tarball when there is no version control system.
+#   Therefore, it cannot be used in any dependencies.  GNUmakefile has
+#   hooks to force a reconfigure at distribution time to get the value
+#   correct, without penalizing normal development with extra reconfigures.
+#
+# .version - present in a checked-out repository and in a distribution
+#   tarball.  Usable in dependencies, particularly for files that don't
+#   want to depend on config.h but do want to track version changes.
+#   Delete this file prior to any autoconf run where you want to rebuild
+#   files to pick up a version string change; and leave it stale to
+#   minimize rebuild time after unrelated changes to configure sources.
+#
+# It is probably wise to add these two files to .gitignore, so that you
+# don't accidentally commit either generated file.
+#
+# Use the following line in your configure.ac, so that $(VERSION) will
+# automatically be up-to-date each time configure is run (and note that
+# since configure.ac no longer includes a version string, Makefile rules
+# should not depend on configure.ac for version updates).
+#
+# AC_INIT([GNU project],
+#         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
+#         [bug-project@example])
+#
+# Then use the following lines in your Makefile.am, so that .version
+# will be present for dependencies, and so that .tarball-version will
+# exist in distribution tarballs.
+#
+# BUILT_SOURCES = $(top_srcdir)/.version
+# $(top_srcdir)/.version:
+#	echo $(VERSION) > $@-t && mv $@-t $@
+# dist-hook:
+#	echo $(VERSION) > $(distdir)/.tarball-version
+
+case $# in
+    1) ;;
+    *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
+esac
+
+tarball_version_file=$1
+nl='
+'
+
+# First see if there is a tarball-only version file.
+# then try "git describe", then default.
+if test -f $tarball_version_file
+then
+    v=`cat $tarball_version_file` || exit 1
+    case $v in
+	*$nl*) v= ;; # reject multi-line output
+	[0-9]*) ;;
+	*) v= ;;
+    esac
+    test -z "$v" \
+	&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
+fi
+
+if test -n "$v"
+then
+    : # use $v
+elif
+       v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
+	  || git describe --abbrev=4 HEAD 2>/dev/null` \
+    && case $v in
+	 [0-9]*) ;;
+	 v[0-9]*) ;;
+	 *) (exit 1) ;;
+       esac
+then
+    # Is this a new git that lists number of commits since the last
+    # tag or the previous older version that did not?
+    #   Newer: v6.10-77-g0f8faeb
+    #   Older: v6.10-g0f8faeb
+    case $v in
+	*-*-*) : git describe is okay three part flavor ;;
+	*-*)
+	    : git describe is older two part flavor
+	    # Recreate the number of commits and rewrite such that the
+	    # result is the same as if we were using the newer version
+	    # of git describe.
+	    vtag=`echo "$v" | sed 's/-.*//'`
+	    numcommits=`git rev-list "$vtag"..HEAD | wc -l`
+	    v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
+	    ;;
+    esac
+
+    # Change the first '-' to a '.', so version-comparing tools work properly.
+    # Remove the "g" in git describe's output string, to save a byte.
+    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
+else
+    v=UNKNOWN
+fi
+
+v=`echo "$v" |sed 's/^v//'`
+
+# Don't declare a version "dirty" merely because a time stamp has changed.
+git status > /dev/null 2>&1
+
+dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
+case "$dirty" in
+    '') ;;
+    *) # Append the suffix only if there isn't one already.
+	case $v in
+	  *-dirty) ;;
+	  *) v="$v-dirty" ;;
+	esac ;;
+esac
+
+# Omit the trailing newline, so that m4_esyscmd can use the result directly.
+echo "$v" | tr -d '\012'
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:

+ 5 - 0
include/Makefile.am

@@ -0,0 +1,5 @@
+rtlsdr_HEADERS = rtl-sdr.h
+
+noinst_HEADERS = i2c.h tuner_e4000.h tuner_fc0013.h
+
+rtlsdrdir = $(includedir)

src/i2c.h → include/i2c.h


src/rtl-sdr.h → include/rtl-sdr.h


src/tuner_e4000.h → include/tuner_e4000.h


src/tuner_fc0013.h → include/tuner_fc0013.h


+ 10 - 0
librtlsdr.pc.in

@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: RTL-SDR Library
+Description: C Utility Library
+Version: @VERSION@
+Libs: -L${libdir} -lrtlsdr -lusb-1.0
+Cflags: -I${includedir}/

+ 2 - 0
m4/.gitignore

@@ -0,0 +1,2 @@
+/libtool.m4
+/lt*.m4

+ 0 - 10
src/Makefile

@@ -1,10 +0,0 @@
-LDFLAGS=`pkg-config --libs libusb-1.0`
-CFLAGS=-Wall -g -O0 `pkg-config --cflags libusb-1.0`
-
-all: rtl-sdr
-
-rtl-sdr: main.o rtl-sdr.o tuner_e4000.o tuner_fc0013.c
-	$(CC) -o $@ $^ $(LDFLAGS)
-
-clean:
-	@rm -f rtl-sdr *.o

+ 15 - 0
src/Makefile.am

@@ -0,0 +1,15 @@
+# This is _NOT_ the library release version, it's an API version.
+# Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification
+LIBVERSION=0:0:0
+
+INCLUDES = $(all_includes) -I$(top_srcdir)/include
+AM_CFLAGS = -fPIC -Wall
+
+lib_LTLIBRARIES = librtlsdr.la
+
+librtlsdr_la_SOURCES = rtl-sdr.c tuner_e4000.c tuner_fc0013.c
+librtlsdr_la_LDFALGS = -version-info $(LIBVERSION)
+
+bin_PROGRAMS         = rtl_sdr
+rtl_sdr_SOURCES      = main.c
+rtl_sdr_LDADD        = librtlsdr.la

+ 2 - 2
src/main.c

@@ -32,7 +32,7 @@ static int do_exit = 0;
 
 void usage(void)
 {
-	printf("rtl-sdr, an I/Q recorder for RTL2832 based USB-sticks\n\n"
+	printf("rtl-sdr, an I/Q recorder for RTL2832 based DVB-T receivers\n\n"
 		"Usage:\t -f frequency to tune to [Hz]\n"
 		"\t[-s samplerate (default: 2048000 Hz)]\n"
 		"\toutput filename\n");
@@ -48,7 +48,7 @@ int main(int argc, char **argv)
 {
 	struct sigaction sigact;
 	int r, opt;
-	char *filename;
+	char *filename = NULL;
 	uint32_t frequency = 0, samp_rate = 2048000;
 	uint8_t buffer[READLEN];
     uint32_t n_read;

+ 4 - 4
src/rtl-sdr.c

@@ -399,7 +399,7 @@ uint32_t rtlsdr_get_device_count(void)
 {
     int i, j;
 	libusb_device **list;
-    uint32_t device_count;
+    uint32_t device_count = 0;
     struct libusb_device_descriptor dd;
 
 	ssize_t cnt = libusb_get_device_list(NULL, &list);
@@ -424,7 +424,7 @@ const char *rtlsdr_get_device_name(uint32_t index)
 	libusb_device **list;
 
 	ssize_t cnt = libusb_get_device_list(NULL, &list);
-	
+
 	if (index > cnt - 1)
 		return NULL;
 
@@ -451,7 +451,7 @@ rtlsdr_dev_t *rtlsdr_open(int index)
     memset(dev, 0, sizeof(rtlsdr_dev_t));
 
 	ssize_t cnt = libusb_get_device_list(NULL, &list);
-	
+
     for (i = 0; i < cnt; i++) {
         device = list[i];
 
@@ -483,7 +483,7 @@ rtlsdr_dev_t *rtlsdr_open(int index)
     }
 
     libusb_free_device_list(list, 0);
-	
+
     unsigned char buffer[256];
 
     libusb_get_string_descriptor_ascii(dev->devh, 0, buffer, sizeof(buffer) );