I got my Free Pascal code here -
program HelloWorld;
uses crt;
begin
writeln('Hello, World!');
readkey;
end.
and saved it into helloworld.pas. When I compile it with fpc, everything goes right and the compiling succeeds. So I tried fp, the IDE that comes with fpc and also uses this very compiler. But here, IDE internal compiling fails. Main error message:
helloworld.pas(2,6) Fatal: Can't find unit crt used by HelloWorld
Related
I compiled the sourceforge tcl executable, it passes all the tests supplied, and it runs with the same segfault I see in my downloaded executable, 8.6.9. I'm running on Ubuntu 16.04 (for legacy reasons) on an AMD processor. ( I have run on ubuntu 18.04 on my laptop, it has the same failure. )
So, next I recompiled with "--enable-symbols=mem" turned on to see if a memory leak is causing the segfault, and now it fails immediately with:
Trying to decr ref count of Tcl_Obj allocated in another thread
./runMeg.sh: line 3: 29972 Aborted (core dumped) ../source/main_megatron.
I'm not seeing any answer on what to do with this response, can someone advise on what this means I need to fix?
All my threads are of the form:
set graphDisplayThread [ thread::create {
after [expr {int(1000) }]
.....
puts "...Initialized graphDisplayUpdate_02 ID $c update."
thread::wait
}]
and:
thread::send $::graphDisplayThread {
incr b
graphDisplayUpdate .c
}
All shared variables are referenced AFTER mutex is captured, and through TSV variables. There are 5 threads in the application, which has no C-code in it at all. Around 2000 lines of code, in total.
The app runs thousands of cycles and then segfaults at random points with a prior ActiveState 8.6.9 pre-compiled version. So, now I'm trying to isolate the failure point with compiled SourceForge 8.6.9 memory checks as a first step, but the issue above is the first one I encounter - and it occurs immediately after starting.
Update (5/16/19 8:28 EST): New Detail to answer comments below.... This application has no C-code in it, and the Tcl_Obj error ONLY appears in the sourceForge-based, 8.6.9 compiles (2) I did myself, not the ActiveState 8.6.9 pre-built download. And the error in the sourceForge code occurs in both the twin "MEM_DEBUG" and NO-"MEM_DEBUG" builds I made in tandem and tested. Both passed all install tests.
To summarize:
sourceForge 8.6.9 compile w/MEM_DEBUG option: Tcl_Obj Abort error
sourceForge 8.6.9 compile w/o MEM_DEBUG option: Tcl_Obj Abort error
ActiveState 8.6.9 build: does not Abort, random seg fault
Why should I trust the sourceForge build I made myself, more than the ActiveState pre-built executable which does not exhibit the problem? And if we do trust the sourceForge compiled version, how do I isolate where the TclObject error is created by the offending TCL code?
Update 5/16/19#13:34EST: The same segfault appears with ActiveState 8.6.9 on Ubuntu 18.04. Haven't checked my builds of SourceForge yet to see how they behave.
By methodically hacking out code blocks and watching to see if the Tcl_Obj error dissappeared or not, I found 2 errors:
I had re-declared my mutex and cond variables more than once. Now it is declared once and referenced in all other places.
A code remnant removing a TSV was found in a place I no longer wanted it.
This also fixed the segfault.
Thanks for all the help and hints, mrcalvin.
I want to write a information schema plugin for mysql,and first Im trying to compile the example plugins and have some errors.
The CmakeList.txt is this:
MYSQL_ADD_PLUGIN(daemon_example daemon_example.cc
MODULE_ONLY TEST_ONLY MODULE_OUTPUT_NAME "libdaemon_example")
INSTALL(FILES daemon_example.ini DESTINATION ${INSTALL_PLUGINDIR} COMPONENT Test)
It is said Unknown Cmake command "MYSQL_ADD_PLUGIN",
Selecting Windows SDK version 10.0.16299.0 to target Windows 6.1.7601.
The C compiler identification is MSVC 19.11.25547.0
The CXX compiler identification is MSVC 19.11.25547.0
Check for working C compiler: E:/visual studio/VC/Tools/MSVC/14.11.25503/bin/Hostx86/x86/cl.exe
Check for working C compiler: E:/visual studio/VC/Tools/MSVC/14.11.25503/bin/Hostx86/x86/cl.exe -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Check for working CXX compiler: E:/visual studio/VC/Tools/MSVC/14.11.25503/bin/Hostx86/x86/cl.exe
Check for working CXX compiler: E:/visual studio/VC/Tools/MSVC/14.11.25503/bin/Hostx86/x86/cl.exe -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
CMake Error at CMakeLists.txt:16 (MYSQL_ADD_PLUGIN):
Unknown CMake command "MYSQL_ADD_PLUGIN".
CMake Warning (dev) in CMakeLists.txt:
No cmake_minimum_required command is present. A line of code such as
cmake_minimum_required(VERSION 3.11)
should be added at the top of the file. The version specified may be lower
if you wish to support older CMake versions for this project. For more
information run "cmake --help-policy CMP0000".
This warning is for project developers. Use -Wno-dev to suppress it.
Configuring incomplete, errors occurred!
See also "C:/Program Files/CMake/bin/CMakeFiles/CMakeOutput.log".
I found this function is in mysql-server\cmake file,
MACRO(MYSQL_ADD_PLUGIN)
MYSQL_PARSE_ARGUMENTS(ARG
"LINK_LIBRARIES;DEPENDENCIES;MODULE_OUTPUT_NAME;STATIC_OUTPUT_NAME"
"STORAGE_ENGINE;STATIC_ONLY;MODULE_ONLY;CLIENT_ONLY;MANDATORY;DEFAULT;DISABLED;NOT_FOR_EMBEDDED;RECOMPILE_FOR_EMBEDDED;TEST_ONLY"
${ARGN}
)
I wonder how to fix it and make the compile success?
error image
I am building a project using Opencv 3.1 and wxwidgets 3.1. The code I use:
[wxOpenCv Demo1]
I try to add a write frame object, using the function cv::imwrite().
(I changed the c calls to c++ eg: cvQueryFrame( m_pCapture ) to m_pCapture >> m_CurFrame;)
I get this error:
Undefined symbols for architecture x86_64:
"cv::imwrite(cv::String const&, cv::_InputArray const&,
std::vector > const&)", referenced from:
CCamera::SaveFrame() in camera.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Without wxwidgets the opencv functions work fine. So its seems that it has to do with the combination of wxwidgets and opencv.
This works fine with wxwidgets and Opencv:
cv::imshow("tmp",m_CurFrame);
cv::waitKey(4);
// cv::imwrite(Tmp , m_CurFrame);
If I uncomment the last line, I get the error.
OS X: 10 Yosemite and I use the default compiler (Apple LLVM 7.0)
I have no idea what to do about this!
solved the problem (and more) by recompiling wxwidgets 3.1.0 and Opencv 3.1. I used these links to get it going.
Small guide to compiling wxWidgets, Opencv against C++ 11:
Compile wxwidgets 3.1.0: I followed the install.txt for OSX. And tweaked the ../configure call with help from this
I added: --enable-debug and changed the macosx version
../configure --disable-shared --enable-debug --enable-unicode --with-cocoa --with-macosx-version-min=10.7 --with-macosx-sdk=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk CXXFLAGS="-std=c++0x -stdlib=libc++" CPPFLAGS="-stdlib=libc++" LIBS=-lc++
Then with the help of this page I build a xcode project. Tweaking a few things:
(wxcocoa.xcodeproj and minimal.xcodeproj, and a all new projects)
Add to the Header Search Path: $(WXROOT)/build/osx (to find wx.xcconfig)
base SDK: latest OS X (10.11)
C language dialect: GNU 11(not sure if this is right)
C++ language dialect: GNU++11 [-std=gnu++11]
C++ Standard Library: libc++ (LLVM C++ standard library with C++ 11 support)
placed the WXROOT under “preference->locations->Source Trees. Not important, but seems to be a better location (restart xcode)
in wxcocoa.xcconfig I changed: MACOSX_DEPLOYMENT_TARGET = 10.10
Somehow I have to change the name of the created library from libwx_osx_cocoa_static.a to: lwx_osx_cocoa_static.a (why, I do not know)
I use GNU++ 11 and thus libc++ to be able to use new functionality like “future"
I then added OpenCV to my newly created wxXcode project:
Compile OpenCV following this: (search the web for: howto-install-build-and-use-opencv-macosx-10-10)
Make sure that the SDK is the right version (here was my biggest problem), matching the build of wxWidgets
The compiler settings same as for wxWidgets (see above)
(added:) To do this I added some lines to the CMakeLists.txt in the (Opencv-master folder). Below the line: # OpenCV compiler and linker options
(I found this trick here: search the web for: OpenCV with C++11 on OS X 10.8
message("Setting up Xcode for C++11 with libc++.")
set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LANGUAGE_STANDARD "c++0x")
set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
Then follow this page to update the newly created wxWidgets xcode project (search the web for: howto-setup-xcode-6-1-to-work-with-opencv-libraries)
This should do the trick! I can now combine wxWidgets, OpenCV and the libc++
(multithreading, “future")
I hope this helps.
Please let me know if you found out more!
I'm using VS2013(update 4) + CUDA 6.5 + win7-32bit
My CUDA program compiles fine without the v120xp option, I need it support winXP. But there're lots of compile error with v120xp specified.
To reproduce the problem:
Create a new project with VS2013's CUDA wizard
Change the Platform Toolset to Visual Studio 2013 - Windows XP (v120_xp)
Compile
The compile error looks like:
1>G:\vs2013\VC\include\yvals.h(666): error : expected a ";"
1>G:\vs2013\VC\include\yvals.h(667): error : expected a ";"
1>G:\vs2013\VC\include\exception(460): error : "explicit" is not allowed
1> kernel.cu
I also compiled the program with CMake, everything is ok(with the v120_xp). Though I write code with CMake, my company uses VS2013, so I need to generate a VS2013 project for my colleagues.
How to make it compile? Thanks.
Finally, a workaround for this:
Don't change the Platform Toolset, leave it as v120, and add /SUBSYSTEM:WINDOWS,5.01 or /SUBSYSTEM:CONSOLE,5.01 manually in Command Line setting
I'm looking to plunge into the realm of router hacking. Currently, I'm just trying to get a simple hello world to run on my router, a F7D7302 v1, running dd-wrt. cpuinfo reveals a BCM4716, and "MIPS 74K V4.0" as the cpu 'model.'
I downloaded CodeSourcery's MIPS cross-compiler. It was pretty simple to get a compiled executable from that point on. I transferred the file, chmod +x'd the file, and it didn't run.
I decided to do a big of snooping and ran 'file' on the router's busybox executable:
[root#LIENUX bin]# file /tmp/busybox
/tmp/busybox: ELF 32-bit LSB executable, MIPS, MIPS32 version 1 (SYSV), dynamically linked (uses shared libs), corrupted section header size
And running 'file' on my hello world:
[root#LIENUX bin]# file test
test: ELF 32-bit LSB executable, MIPS, MIPS32 rel2 version 1, dynamically linked (uses shared libs), for GNU/Linux 2.6.16, with unknown capability 0xf41 = 0x756e6700, with unknown capability 0x70100 = 0x1040000, not stripped
Running test on the router with static libraries caused a 100% CPU hang; running with dynamic libraries caused a 'not found' error. All appropriate permissions were set.
Anyone know what I am doing wrong?