I am trying to use the library found here:
https://tmrh20.github.io/RF24/RPi.html
I am running an RPi 2 B+ with Raspbian current 11/12/15
I have the example working on Arduino and I have no issues communicating Arduino to Arduino. However when attempting to use the RPi example I end up with this error.
pi#raspberrypi ~/Desktop/rf24 $ cd rf24libs/RF24/examples_RPi/
pi#raspberrypi ~/Desktop/rf24/rf24libs/RF24/examples_RPi $ make
g++ -Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s -Wall -I../ -lrf24-bcm transfer.cpp -o transfer
transfer.cpp: In function ‘int main(int, char**)’:
transfer.cpp:129:10: error: ‘sleep’ was not declared in this scope
sleep(2);
^
Makefile:32: recipe for target 'transfer' failed
make: *** [transfer] Error 1
The instructions are incredibly simple:
wget http://tmrh20.github.io/RF24Installer/RPi/install.sh
chmod +x install.sh
./install.sh
cd rf24libs/RF24/examples_RPi
make
sudo ./gettingstarted
So I would expect something that is "out of the box" to function normally correct? Apparently not...
I also have the library that is required for the build, found here:
http://www.airspayce.com/mikem/bcm2835/
I have it installed and ready to go. But in order to continue I need to be able to get this basic gettingstarted example to function. I am new to using GPIO but I have followed the diagram on this page:
https://raspberrypi.stackexchange.com/questions/22490/rf24-communication-with-arduino
TL;DR
I cannot get the basic example to function based off code found in a well documented and commonly used library using RF24 modules utilizing RPi and the gettingstarted example included in the library.
I invite you to download this and try installing it yourselves on your RPi to see if we all have the same issues. Maybe we can solve this once and for all.
Any help will be much appreciated and I will be monitoring this thread.
Thank you.
Add the following include below the existing includes in transfer.cpp... It'll look like this...
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>
#include <RF24/RF24.h>
#include <unistd.h>
Afterwords verify that sleep is lowercase:
if (role == role_ping_out){
sleep(2);
printf("Initiating Basic Data Transfer\n\r");
Should compile now...
Related
I was trying use build wxWidgets-3.1.3 with MinGW-W64 on a x64 windows machine.
I followed this thread, which lead me to download and building. So I installed it and some youtube videos said I need to build it now. So navigate to the installed folder and gave this command :
mingw32-make -f makefile.gcc BUILD=release SHARED=1 MONOLITHIC=1 UNICODE=1.
It took almost half an hour and now it's giving me error saying :
collect2.exe: error: ld returned 1 exit status
makefile.gcc:5329: recipe for target '..\..\lib\gcc_dll\wxmsw313u_gcc_custom.dll' failed
mingw32-make: *** [..\..\lib\gcc_dll\wxmsw313u_gcc_custom.dll] Error 1
Here is the full log file :
https://pastebin.com/zxeHhF6K
MinGW configuration :
Version : 8.1.0
Architecture : x86_64
Threads : posix
Exceptions : seh
Build version : 0
How can I solve this? I'm using CLion, is there any other short or easy way?
The relevant error is
..\..\lib\gcc_dll/libwxexpat.a(wxexpat_xmlparse.o):xmlparse.c:(.text+0x337d): undefined reference to `_imp__rand_s'
and it's very strange because MinGW-w64 8.1 is definitely supposed to have rand_s(). Are you sure you're using the right compiler? I.e. what does g++ -v give you if you run it from the same command prompt?
My only hypothesis is that it's some different (and much older) compiler and the solution would be to just use the right one instead.
Also, the next time you could use -j4 option with make if you have at least 4 logical CPUs in your machine (and chances are you do nowadays), to significantly speed up the build.
Looking back in my notes I once had an issue with missing rand_s() when building glib2 on a certain MinGW build.
I was able to fix it then by adding this at the top of the C file that called this function:
#include <time.h>
#include <stdlib.h>
int rand_s (unsigned int* r)
{
static int srand_called = 0;
if (!srand_called) {
srand(time(0));
srand_called++;
}
if (r)
*r = rand();
return 0;
}
In your case that would be in xmlparse.c.
I am trying to build the AWS C++ SDK on Solaris, but I cannot do so successfully.
I found this open issue on the AWS C++ SDK page that says it is possible, but there is no guide on it and I am hoping somebody here can help.
Here is the command I use to build it:
$ cmake ../aws-sdk-cpp/ -DCMAKE_BUILD_TYPE=Debug -DBUILD_ONLY="s3"
Here is the output:
-- TARGET_ARCH not specified; inferring host OS to be platform compilation target
-- Building AWS libraries as shared objects
-- Generating linux build config
-- Building project version: 1.7.134
-- Configuring done
-- Generating done
-- Build files have been written to: /workspace/dmoini/sdk_build/.deps
gmake: Warning: File 'Makefile' has modification time 267 s in the future
gmake[1]: Warning: File 'CMakeFiles/Makefile2' has modification time 267 s in the future
gmake[2]: Warning: File 'CMakeFiles/AwsCCommon.dir/progress.make' has modification time 267 s in the future
gmake[2]: warning: Clock skew detected. Your build may be incomplete.
gmake[2]: Warning: File 'CMakeFiles/AwsCCommon.dir/progress.make' has modification time 267 s in the future
[ 4%] Performing build step for 'AwsCCommon'
[ 1%] Building C object CMakeFiles/aws-c-common.dir/source/array_list.c.o
In file included from /usr/include/stdio.h:37:0,
from /workspace/dmoini/sdk_build/.deps/build/src/AwsCCommon/include/aws/common/common.h:22,
from /workspace/dmoini/sdk_build/.deps/build/src/AwsCCommon/include/aws/common/array_list.h:18,
from /workspace/dmoini/sdk_build/.deps/build/src/AwsCCommon/source/array_list.c:16:
/opt/gcc-5.1.0/lib/gcc/i386-pc-solaris2.11/5.1.0/include-fixed/sys/feature_tests.h:405:2: error: #error "Compiler or options invalid for pre-UNIX 03 X/Open applications and pre-2001 POSIX applications"
#error "Compiler or options invalid for pre-UNIX 03 X/Open applications \
^
gmake[5]: *** [CMakeFiles/aws-c-common.dir/build.make:63: CMakeFiles/aws-c-common.dir/source/array_list.c.o] Error 1
gmake[4]: *** [CMakeFiles/Makefile2:484: CMakeFiles/aws-c-common.dir/all] Error 2
gmake[3]: *** [Makefile:139: all] Error 2
gmake[2]: *** [CMakeFiles/AwsCCommon.dir/build.make:112: build/src/AwsCCommon-stamp/AwsCCommon-build] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/AwsCCommon.dir/all] Error 2
gmake: *** [Makefile:84: all] Error 2
CMake Error at CMakeLists.txt:193 (message):
Failed to build third-party libraries.
Additionally, here is my system information:
$ uname -a
SunOS bld-dmoini-01-sv4b 5.11 omnios-r151020-4151d05 i86pc i386 i86pc
Any and all help/guidance is greatly appreciated.
I've successfully completed compiling the AWS C++ SDK on a stock install of Solaris 11.4, and found several issues that could cause the problems noted.
Start with a clean source tree.
Remove -Werror
The first thing do to is remove the -Werror compiler options. The version of OpenSSL installed by default on Solaris 11.4 has quite a few deprecated functions, and the -Werror option causes the build to fail when it runs into those deprecations. I used this find command run from the topmost directory of the AWS SDK source tree to remove all the -Werror options:
vi `find . | xargs grep -l Werror`
You'll get about three or four files, only two of which are actually setting the -Werror as a compiler option. Just remove the "-Werror" strings from those files.
Fix the POSIX defines
Then run cmake . in the topmost directory. It will fail because the cmake files that it downloads will have improper POSIX command-line options - -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=500. That 500 is wrong. _POSIX_C_SOURCE=200809L corresponds to _XOPEN_SOURCE=700. _XOPEN_SOURCE=500 is SUSv2, circa 1997. It's not proper to compile a SUSv2 application with C99.
Per 2.2.1 Strictly Conforming POSIX Application, paragraph 8:
For the C programming language, shall define _POSIX_C_SOURCE to be 200809L before any header is included
and 2.2.4 Strictly Conforming XSI Application, paragraph 8:
For the C programming language, shall define _XOPEN_SOURCE to be 700 before any header is included
Per the Illumos sys/feature_tests.h file (based on OpenSolaris, which was also the basis for Solaris 11):
* Feature Test Macro Specification
* ------------------------------------------------ -------------
* _XOPEN_SOURCE XPG3
* _XOPEN_SOURCE && _XOPEN_VERSION = 4 XPG4
* _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED = 1 XPG4v2
* _XOPEN_SOURCE = 500 XPG5
* _XOPEN_SOURCE = 600 (or POSIX_C_SOURCE=200112L) XPG6
* _XOPEN_SOURCE = 700 (or POSIX_C_SOURCE=200809L) XPG7
The files cmake downloads via git need to be edited:
vi `find .deps | xargs grep -l XOPEN_SOURCE`
Change any -D_XOPEN_SOURCE=500 to -D_XOPEN_SOURCE=700 and rerun cmake .. It should complete successfully this time.
Then run gmake. (I find gmake works much better on Solaris for just about all open source projects, as many open source projects use GNU-specific make extensions.)
Now you get to fix any broken source code you run into.
Fix broken source code
1
The file aws-sdk-cpp/aws-cpp-sdk-core/source/platform/linux-shared/OSVersionInfo.cpp has the following wrong code:
Aws::String ComputeOSVersionString()
{
utsname name;
int32_t success = uname(&name);
Per POSIX, the correct type is struct utsname, not just utsname:
int uname(struct utsname *name);
The AWS code needs to be:
Aws::String ComputeOSVersionString()
{
struct utsname name;
int success = uname(&name);
And no, I'm most certainly not impressed with the quality of the AWS code, given this, umm, laugher:
while (!feof(outputStream))
Yes, an actual while (!feof()) loop...
2
The file aws-sdk-cpp/aws-cpp-sdk-mediaconvert/include/aws/mediaconvert/model/M2tsSegmentationMarkers.h uses an enumeration with the value EBP, which conflicts with the EBP register #define in /usr/include/sys/regset.h.
I just changed it to EBP_HASH as that seems to match the code somewhat:
vi `find . | xargs grep -l EBP`
3
The file aws-sdk-cpp/aws-cpp-sdk-route53domains/include/aws/route53domains/model/CountryCode.h creates an enumeration value ES that conflicts with the ES register #define in /usr/include/sys/regset.h. I just added
#ifdef ES
#undef ES
#endif
and the compile continued. I don't know if that #undef could have broken anything.
4
The file aws-sdk-cpp/aws-cpp-sdk-waf/include/aws/waf/model/GeoMatchConstraintValue.h has ES, GS, and SS enumeration value that conflict with the ES, GS, and SS register #define's in /usr/include/sys/regset.h.
Again, I just added a few more #undef's:
#ifdef ES
#undef ES
#endif
#ifdef GS
#undef GS
#endif
#ifdef SS
#undef SS
#endif
I'm really wondering why sys/regset.h is being #include'd in just about everything in the AWS SDK.
5
Same problem in aws-sdk-cpp/aws-cpp-sdk-waf-regional/include/aws/waf-regional/model/GeoMatchConstraintValue.h. Same fix, add:
#ifdef ES
#undef ES
#endif
#ifdef GS
#undef GS
#endif
#ifdef SS
#undef SS
#endif
Note that compiling on SPARC hardware means the #define value from sys/regset.h will be completely different, and any errors will be completely different.
6
The file aws-sdk-cpp/aws-cpp-sdk-core-tests/utils/FileSystemUtilsTest.cpp incorrectly assumes the POSIX NAME_MAX value is defined. Per the POSIX Pathname Variable Values standard (bolding mine):
Pathname Variable Values
The values in the following list may be constants within an
implementation or may vary from one pathname to another. For example,
file systems or directories may have different characteristics.
A definition of one of the symbolic constants in the following list
shall be omitted from the <limits.h> header on specific
implementations where the corresponding value is equal to or greater
than the stated minimum, but where the value can vary depending on the
file to which it is applied. The actual value supported for a specific
pathname shall be provided by the pathconf() function.
Again: the "definition ... shall be omitted ... where the value can vary".
The AWS code wrongly assumes NAME_MAX must be #define'd.
I just hardcoded a value of 255 to get past this point, although using something like _POSIX_NAME_MAX or _XOPEN_NAME_MAX is probably better.
7
File aws-sdk-cpp/ws-cpp-sdk-core-tests/http/HttpClientTest.cpp seems to be incorrectly assuming a std::shared_ptr will be 8 bytes. This question and answer provides a good example of how that's wrong.
I just ignored this error as it's just a test and continued with gmake -i, which completed successfully outside of this one error.
I'm working and on a large C++ project and making it compile with clang would be painful, so I'm stuck with GCC.
I want to use the nice -fsanitize=leak flag that I already used with clang on a previous job, but it does not seem to work.
I made a very simple example to test it:
#include <stdlib.h>
void FooBar() {
malloc(7);
}
int main() {
FooBar();
return 0;
}
With clang it works as expected:
>> clang -fsanitize=leak main.cpp
>> LSAN_OPTIONS=detect_leaks=1 ./a.out
=================================================================
==18052==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 7 byte(s) in 1 object(s) allocated from:
#0 0x41dcbc (~/dev/addresssanitizertest/a.out+0x41dcbc)
#1 0x431ac3 (~/dev/addresssanitizertest/a.out+0x431ac3)
#2 0x431ae3 (~/dev/addresssanitizertest/a.out+0x431ae3)
#3 0x7f8077e71a3f (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f)
SUMMARY: LeakSanitizer: 7 byte(s) leaked in 1 allocation(s).
>>
But with gcc it does not seem to detect anything:
>> gcc -fsanitize=leak main.cpp
>> LSAN_OPTIONS=detect_leaks=1 ./a.out
>>
Did I miss something like a nice environment variable? Did someone ever made it work with gcc?
EDIT: This works for instance:
g++ -fsanitize=address main.cpp
ASAN_OPTIONS=detect_leaks=1 ./a.out
But I can't do that: the perf drawback is too much. I only want leak detection.
You must read this and use the patch :
https://gcc.gnu.org/ml/gcc-patches/2013-11/msg01874.html
I resolved it with gcc 5.1 (I was using 4.9).
EDIT: it looks like 5.2 does not work either
EDIT2: it does not work with the gcc provided with ubuntu 15.10 (5.2.1), however I recompiled a 5.2.0 from sources and it worked fine. I really have no clue.
I had the same issue (with Ubuntu 15.04 and gcc 4.9.2).
Using ldd I noticed that liblsan.so was not linked, so here how I fixed it :
1) Force linking during compilation
>> gcc -fsanitize=leak main.cpp -llsan
2) Execute with
./a.out
I recently installed the hdf5 library on an ubuntu machine, and am now having trouble linking to the exported functions. I wrote a simple test script readHDF.cpp to explain the issue:
#include <hdf5.h>
int main(int argc, char * argv[])
{
hid_t h5_file_id = H5Fopen(argv[1], H5F_ACC_RDWR, H5P_DEFAULT);
return 0;
}
The compile command is
g++ -Wl,-rpath,$HOME/hdf5/lib -I$HOME/hdf5/include \
-L$HOME/hdf5/lib -l:$HOME/hdf5/lib/libhdf5.so readHDF.cpp
which returns the following error
/tmp/cc6DXdxV.o: In function `main':
readHDF.cpp:(.text+0x1f): undefined reference to `H5check_version'
readHDF.cpp:(.text+0x3c): undefined reference to `H5Fopen'
collect2: ld returned 1 exit status
I am confused because the nm command seems to say that the function has been exported:
nm -C $HOME/hdf5/lib/libhdf5.so | grep H5check_version
which returns
0000000000034349 T H5check_version
and a similar result for H5Fopen. Any thoughts on what might be going wrong? Not sure if it helps, but if I comment out the H5Fopen portion of the script, then it compiles fine:
#include <hdf5.h>
int main(int argc, char * argv[])
{
hid_t h5_file_id;// = H5Fopen(argv[1], H5F_ACC_RDWR, H5P_DEFAULT);
return 0;
}
Also there are multiple versions of hdf5 installed on the server which are used by various python modules such as h5py and tables, but I couldn't get any of them to work, so I installed this version in my local directory and changed the rpath options for g++ linker.
Ok, solved. The issue was in the placement of the -lhdf5 in the compile command. Apparently -lhdf5 should be placed after readHDF.cpp. For instance g++ -Wl,-rpath=$HOME/hdf5/lib -L$HOME/hdf5/lib -I$HOME/hdf5/include readHDF.cpp -lhdf5 will compile with no problems, but g++ -Wl,-rpath=$HOME/hdf5/lib -L$HOME/hdf5/lib -I$HOME/hdf5/include -lhdf5 readHDF.cpp will fail with the undefined reference errors. Interestingly, this was only a problem for Ubuntu 12.04, as both compile commands worked for Ubuntu 10.04.
Found the answer with explanation at this post:
undefined reference to symbol even when nm indicates that this symbol is present
I guess placing -lXXX after the script is safer practice.
This is not a bug. See
C++ shared library undefined reference to `FooClass::SayHello()'
"Recent versions of GCC reuqire that you put the object files and libraries in the order that they depend on each other ..."
You forgot to put -lhdf5 in the compile command. Also, there's no need for -l:$HOME/hdf5/lib/libhdf5.so
This should work: $ g++ -Wl,-rpath,$HOME/hdf5/lib -I$HOME/hdf5/include -L$HOME/hdf5/lib -lhdf5 readHDF5.cpp
I want to create a custom GTK module which should be loaded when I start a GTK application.
Documentation on this topic is rare, I searched a lot but I failed to get it running. I'm on Ubuntu Linux with GTK3 and tried sofar:
Compiled and linked a shared library with the method void gtk_module_init(gint *argc, gchar ***argv[]) inside. As far as I understood, this should be enough to create a simple module. Full code:
#include <iostream>
#include <gtk/gtk.h>
void gtk_module_init(gint *argc, gchar ***argv[]) {
std::cout << "huhu" << std::endl;
}
Put this lib into /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/libtest-gtk-module.so
Tried to launch an application like this: gnomine --gtk-module=libtest-gtk-module.so But all I get is: Gtk-Message: Failed to load module "libtest-gtk-module.so"
So what else has to be done in order to make GTK load this library?
Many thanks in advance!
You need to make the system aware of the library. For a library in a system directory, it should be enough to run ldconfig as root. Take a look at the tutorial here.
[EDIT]
I got the module to load as follows:
Since this is C++ code, you need to make sure the function name isn't name mangled:
extern "C" {
void gtk_module_init(gint *argc, gchar ***argv[]) {
std::cout << "huhu" << std::endl;
}
}
I built it with the following:
g++ -fPIC -shared -Wl,-soname,libfoo.so.1 -olibfoo.so.1.0.1 `pkg-config --libs --cflags gtk+-3.0` t.c
I used an absolute path to avoid messing with ldconfig, this is probably the best thing to do while developing the module:
~$ gedit --gtk-module=/home/eric/libfoo.so.1.0.1 t.c
huhu
This is on Mint LMDE, not Ubuntu, but I don't think it matters.
Try to run it with strace:
strace -eopen add_your_command_here 2>&1 | grep libtest-gtk-module.so
You'll find out where your program is looking for that file.