CMakeList.txt -X -lm options VALA GLib.Math - cmake

I am compiling a project in Vala and GTK +... In the compiler I pass options "-X -lm" corresponding to GLib.Math.
I'm already using glib-2.0 package but not know to spend those options through the CMakeList.txt file.
currently I run the following command to compile:
$ valac --pkg glib-2.0 main.vala -X -lm -o app
everything perfect, but not know how to make CMakeList.txt compile with these options "-X -lm"
Somebody give me a hand with this? Thousand thanks!
PS: Sorry for my bad English
SOLUTION:
add following line or modify if exist:
link_libraries(${DEPS_LIBRARIES} -lm)

You don't want to pass -X -lm to valac—when using a build system like CMake or autotools, typically the build system first converts the Vala code to C (valac -C), then hooks into the existing architecture for compiling the C. What you want to do is tell CMake to link to libm, which you probably want to use target_link_libraries for. Something like target_link_libraries(target_name m).

Related

generating debug info with emscripten / ninja / cmake on complex project

I am trying to debug a port of some c and c++ code to WASM. I worked out how to source level debug in the browser with a simple 10 line .c program but now I want to make that work with a non trivial code base. (mixed c and c++). The wasm code works in a simple app but not in my more complex use case, hence the need to debug it
I use CMake to generate ninja build files
Here is where I am setting flags in my CMakeLists.txt
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \
-s MODULARIZE=1 \
-s SINGLE_FILE=1 \
-s EXPORT_NAME=aubio \
-g --bind")
this was basically copied from the original codebase (the -g instead of -Oz is mine), I am not a CMake nor ninja nor emscripten wizard. When I build this I can see that the CXX flags are not passed to the emc++ compile passes, only to the 'linker' phase
I am not even sure where the -g (perhaps with source-map) needs to be for a multi-file project 'linked' into a single file. Should it be on the compile passes or the link pass , or maybe both. But certainly at the moment I do not get any symbols anywhere, no 'map' file(s) (embedded DWARF?, since the browser plugin claims to support it)
set(CMAKE_BUILD_TYPE Debug)
seems to embed DWARF to WASM file.
I don't know why set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g") nor target_compile_options(foo PUBLIC -g) doesn't work in Release build.

llvm cmake add_llvm_loadable_module unknown

I am an llvm beginner. I compiled llvm which checked from svn, and I got the error: unknown cmake command add_llvm_loadable_module when using cmake to create a makefile in llvmroot/lib/Transform/Hello/build. I have no idea why this occur. Is there something wrong when compiling llvm? In this case, I compiled llvm by cmake -G "Unix Makefiles" in macros. Thanks for your help.
You just mixed things up.
You should cd into ~/llvm/build and run cmake ~/llvm or cmake ... And you don't need -DCMAKE_PREFIX_PATH at all in this case.
This command will just generate build files for you. Now, if you want to build only that Hello pass instead of whole LLVM, run make help | grep Hello to find out how the corresponding target is called and then make <target>.
You should used add_llvm_library in CMakeLists.txt
like this:
add_llvm_library(My_Plugin MODULE My_Plugin.cpp PLUGIN_TOOL clang)

Error while linking a class in objective-c

I am writing an Objective C program to log and I am using Ubuntu to compile it.
While compiling, I am getting error as
/tmp/ccJKC2MN.o:(.data+0x150): undefined reference to
`__objc_class_name_AbcLogger'
I have linked all my header files at the starting of each class.
My program:
Logger.h
Logger.m
AbcLogger.h
AbcLogger.m
example.m
To compile it I am using the command:
gcc -x objective-c -I/usr/include/GNUstep \
-fconstant-string-class=NSConstantString \
-D_NATIVE_OBJC_EXCEPTIONS \
Logger.h AbcLogger.h example.m -lgnustep-base -o human
Can you please help me with the issue. Ask for the code if you need it.
My suggestion would be to make a GNUmakefile
I can't say if this is 100% accurate because I can't be sure of this program setup, but I would write one like this:
include $(GNUSTEP_MAKEFILES)/common.make
TOOL_NAME=human
human_OBJC_FILES=\
Logger.m\
AbcLogger.m\
example.m
human_HEADERS=\
Logger.h\
AbcLogger.h
include $(GNUSTEP_MAKEFILES)/tool.make
you will need GNUSTEP_MAKEFILES to lead to the GNUstep/Makefiles path so if it spits out an error like "Can't find common.make" make sure you run
export GNUSTEP_MAKEFILES=/(Where ever you GNUstep folder is)/Makefiles
just type
make
GOOD LUCK!

G++: error: unrecognized option ‘-soname’

I am trying to build SLitrani on Ubuntu 12.04 64-bit. I have already built ROOT 5.34.03 from source and I did figure out how to set the LD_LIBRARY_PATH and PATH variables for $ROOTDEV so the problem is not there but when I try to make SplineFit I get
>>> g++: error: unrecognized option ‘-soname=libSplineFit.so’
make: *** [libSplineFit.so] Error 1
I also did change all the -m32 to -m64 in the Makefiles so I don't know what is going on. I was able to get TwoPad installed but I can't continue from SplineFit. I have been on this build for quite some time and would appreciate any help.
From memory, soname is a linker operation, not a compiler one. So, if you're doing it with g++, you may need to change the option into something like:
-Wl,-soname=libSplineFit.so
The following transcript shows that this is necessary:
pax> g++ --soname=x -Wall -o qq qq.cpp
cc1plus: error: unrecognized command line option "-fsoname=x"
pax> g++ -Wl,-soname=x -Wall -o qq qq.cpp
pax>
From the online GNU docs for gcc:
-Wl,option: pass option as an option to the linker. If option contains commas, it is split into multiple options at the commas.
I know this is an old question but after a week of struggling I thought I should post my findings.
I've successfully edited the makefiles for this so they can compile on Ubuntu 12.04 x64.
You can remove the -soname option completely, it seemingly is unnecessary.
As mentioned: all "m32" change to "m64".
You can replace "$ROOTSYS/libs" with "$ROOTLIBS"
and with TwoPad makefile reorder the library order (under LIBS += (.....)) so that -lTwoPad is NOT last on the list, and for VisuSLitrani make -lPhysMore last in its group.
As far as I know the errors saying "set but not used" can be ignored.
If any of this still doesn't work contact me back and I can send you my makefiles.
Here a nice explanation of the -soname linker option, how to call it and what it is good for.
Summary
You can simply use gcc -shared -Wl,-soname,libfoo_v1.so -o libfoo_v1.so libfoo_v1.o and skip the following discussion ;)
call it as gcc -shared -Wl,-soname,libfoo.so -o libfoo_v1.so libfoo_v1.o
after compiling you need to create an symbolic link pointing to libfoo_v1.so ln -s libfoo_v1.so libfoo.so before you can execute your code.
This is used to link against different shared libraries during compiletime and runtime. Obviously these libraries need a similar interface. You can use this for managing different versions.

Problems when compiling Objective C with Clang (Ubuntu)

I'm learning Objective-C language. Since I don't have a Mac, I'm compiling and running my code within Ubuntu 11.04 platform.
Until now, I was using gcc to compile. I've installed GNUStep and all was working. But then I started to try some Objective-C 2.0 features, like #property and #synthesize, that gcc does not allow.
So I tried to compile the code with Clang, but it seems that it is not correctly linking my code with the GNUStep libraries, not even with a simple Hello world program.
For example, if I compile the following code:
#import <Foundation/Foundation.h>
int main(void) {
NSLog(#"Hello world!");
return 0;
}
The output of the compiler is:
/tmp/cc-dHZIp1.o: In function `main':
test.m:(.text+0x1f): undefined reference to `NSLog'
/tmp/cc-dHZIp1.o: In function `.objc_load_function':
test.m:(.text+0x3c): undefined reference to `__objc_exec_class'
collect2: ld returned 1 exit status
clang: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
The command I'm using to compile is
clang -I /usr/include/GNUstep/ test.m -o test
with the -I directive to include the GNUStep libraries (otherwise, Clang is not able to find Foundation.h).
I've googled my problem, and visited both GNUStep and Clang web pages, but I haven't found a solution to it. So any help will be appreciated.
Thanks!
The problem was that the library gnustep-base was not being used by the linker. So the solution to this was using the option -Xlinker, that sends arguments to the linker used by clang:
clang -I /usr/include/GNUstep/ -Xlinker -lgnustep-base test.m -o test
The statement "-X linker -lgnustep-base" made the magic. However, I had problems with this command related to the class that represents a string in Objective-C:
./test: Uncaught exception NSInvalidArgumentException, reason: GSFFIInvocation:
Class 'NXConstantString'(instance) does not respond to forwardInvocation: for
'hasSuffix:'
I could solve it adding the argument "-fconstant-string-class=NSConstantString":
clang -I /usr/include/GNUstep/ -fconstant-string-class=NSConstantString \
-Xlinker -lgnustep-base test.m -o test
In addition, I've tried with some Objective-C 2.0 pieces of code and it seems to work.
Thank you for the help!
You can try gcc compiler:
First of all install GNU Objective-C Runtime: sudo apt-get install gobjc
then compile: gcc -o hello hello.m -Wall -lobjc
You are not able to use ObjC 2.0 features because you're missing a ObjC-runtime supporting those. GCC's runtime is old and outdated, it doesn't support ObjC 2.0. Clang/LLVM doesn't have a acompanied runtime, you need to install the ObjC2-runtime from GNUstep (which can be found here: https://github.com/gnustep/libobjc2 ) and reinstall GNUstep using this runtime.
Here are some bash scripts for different Ubuntu versions, that do everything for you:
http://wiki.gnustep.org/index.php/GNUstep_under_Ubuntu_Linux
And please don't try to reinvent GNUstep make, instead, use it:
http://www.gnustep.org/resources/documentation/Developer/Make/Manual/gnustep-make_1.html
If you really don't think so, here is some excerpt from there:
1.2 Structure of a Makefile
Here is an example makefile (named GNUmakefile to emphasis the fact that it relies on special features of the GNU make program).
#
# An example GNUmakefile
#
# Include the common variables defined by the Makefile Package
include $(GNUSTEP_MAKEFILES)/common.make
# Build a simple Objective-C program
TOOL_NAME = simple
# The Objective-C files to compile
simple_OBJC_FILES = simple.m
-include GNUmakefile.preamble
# Include in the rules for making GNUstep command-line programs
include $(GNUSTEP_MAKEFILES)/tool.make
-include GNUmakefile.postamble
This is all that is necessary to define the project.
In your case replace all occurrences of simple with test and you're done
1.3 Running Make
Normally to compile a package which uses the Makefile Package it is purely a matter of typing make from the top-level directory of the package, and the package is compiled without any additional interaction.