adding front-end-cal manpage

docs/manpage/front-end-cal-manpage

@@ -0,0 +1,41 @@
+.\" Manpage for front-end-cal.
+.\" Contact javier.arribas@cttc.es to correct errors or typos.
+.TH front-end-cal 1 "15 Dec 2014" "0.0.1" "front-end-cal man page"
+.SH NAME
+\fBfront-end-cal\fR \- RF front-end center frequency and sampling rate calibration tool.
+.SH SYNOPSIS
+\fBfront-end-cal -config_file=\fR\fI<path-to-configuration-file>\fR [OPTION]...
+.SH DESCRIPTION
+\fBfront-end-cal\fR is a calibration tool for some DVB-T receivers based on the Taiwan's Realtek RTL2832U chipset, sold in form of USB dongles that allow users to watch over-the-air DVB-T European broadcast television on their personal computers, to be used as GNSS front-ends.
+\.TP
+Normally, those devices send partially-decoded MPEG transport frames over the USB, but exploiting an undocumented mode of operation of the demodulator chip, the user is able to obtain raw I&Q samples, stream them through USB to a personal computer and then use \fBgnss-sdr\fR, turning the DVB-T receiver into a GNSS receiver and delivering position in real-time.
+\.TP
+The crystal oscillator that ships with the RTL2832U family devices exhibits limited accuracy to be used as a GNSS receiver front-end without previous calibration. \fBfront-end-cal\fR automatizes the algorithm proposed in [1], and it requires Internet access since it retrieves Assisted GPS data from SUPL servers.
+\.TP
+\fBfront-end-cal\fR is able to work with raw data files or, if there is computational power enough, in real time with suitable radiofrequency front-ends. The whole receiver is defined in a single configuration file, and therefore users can define theirs.
+.SH OPTIONS
+\fBfront-end-cal\fR takes the following options:
+.TP
+\fB-config_file=\fR\fI<path-to-configuration-file>\fR Set the configuration file.
+.TP 
+\fB-signal_source=\fR\fI<path-to-raw-signal-file>\fR If defined, path to the file containing the signal samples (overrides the data file specified in the configuration file).
+.TP 
+\fB-log_dir=\fR\fI<path-to-directory>\fR If defined, overrides the default directory where logs are saved.
+.TP
+\fB-version\fR Print program version and exit.
+.TP
+\fB-help\fR Print all the available commandline flags and exit.
+.SH SEE ALSO
+.BR gnss-sdr (1), volk_gnsssdr_profile (1)
+\.TP
+Example of configuration file available at: ${prefix}/share/gnss-sdr/conf/front-end-cal.conf, where ${prefix}$ uses to be /usr or /usr/local.
+\.TP
+[1] C. Fernandez-Prades, J. Arribas, P. Closas, \fITurning a Television into a GNSS Receiver\fR, in Proceedings of ION GNSS+, 15-16 September 2013, Nashville, Tennessee (USA). A draft copy is freely available at http://www.cttc.es/publication/turning-a-television-into-a-gnss-receiver/
+\.TP
+Check http://gnss-sdr.org for more information.
+.SH BUGS
+No known bugs.
+.SH AUTHOR
+Javier Arribas (javier.arribas@cttc.es)
+\.TP
+This software has been developed at CTTC (Centre Tecnologic de Telecomunicacions de Catalunya, http://www.cttc.es) with contributions from around the world.

src/utils/front-end-cal/CMakeLists.txt

@@ -17,7 +17,7 @@
 #
 
 
-if(ENABLE_RTLSDR)
+if(ENABLE_OSMOSDR)
     set(FRONT_END_CAL_SOURCES front_end_cal.cc)
 
     include_directories(
@@ -56,6 +56,7 @@ if(ENABLE_RTLSDR)
     )
 
     add_definitions( -DGNSS_SDR_VERSION="${VERSION}" )
+    add_definitions( -DGNSSSDR_INSTALL_DIR="${CMAKE_INSTALL_PREFIX}" )
 
     add_executable(front-end-cal ${CMAKE_CURRENT_SOURCE_DIR}/main.cc)
 
@@ -80,4 +81,19 @@ if(ENABLE_RTLSDR)
             COMPONENT "front-end-cal"
             )
             
-endif(ENABLE_RTLSDR)
+    find_program(GZIP gzip
+                 /bin
+                 /usr/bin
+                 /usr/local/bin
+                 /opt/local/bin
+                 /sbin
+                 )
+
+    if(NOT GZIP_NOTFOUND)
+        execute_process(COMMAND gzip -9 -c ${CMAKE_SOURCE_DIR}/docs/manpage/front-end-cal-manpage
+                     WORKING_DIRECTORY ${CMAKE_BINARY_DIR} OUTPUT_FILE "${CMAKE_BINARY_DIR}/front-end-cal.1.gz")
+
+        install(FILES ${CMAKE_BINARY_DIR}/front-end-cal.1.gz DESTINATION share/man/man1)   
+    endif(NOT GZIP_NOTFOUND)
+            
+endif(ENABLE_OSMOSDR)

src/utils/front-end-cal/main.cc

@@ -79,7 +79,11 @@ using google::LogMessage;
 
 DECLARE_string(log_dir);
 
-DEFINE_string(config_file, "../conf/front-end-cal.conf",
+std::string s1_(GNSSSDR_INSTALL_DIR);
+std::string s2_("/share/gnss-sdr/conf/front-end-cal.conf");
+std::string s3_ = s1_ + s2_;
+
+DEFINE_string(config_file, s3_,
         "Path to the file containing the configuration parameters");
 
 concurrent_queue<Gps_Ephemeris> global_gps_ephemeris_queue;