Is there a way to compile the PHP extension mbstring statically into PHP (PHP >= 7)? Something like ./configure [...] --enable-mbstring=static [...] && make?
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I have installed msys2/mingw64 because I need the g++ compiler. Now, I want to compile some c++ oce which requires openblas. I have installed the package using pacman -S mingw-w64-x86_64-openblas. However, compiling the code fails with
fatal error: cblas.h: No such file or directory
Clearly, the include path does not contain the headers from openblas which are located at C:\msys64\mings64\include\openblas. This is easy to fix by passing -I<include path> as an additional argument to g++.
Now, I was wondering whether there is an automated way to include include files/headers of installed packages in the g++ include path. The same problem also holds for libraries.
For example, pacman might be able to atomatically append these paths onto some environment variable which g++ checks.
The standard way to get compilation and linking options for a library on MSYS2 and other Unix-like systems is to run this command:
pkg-config --cflags --libs openblas
If you're just compiling, use --cflags by itself.
If you're just linking, use --libs by itself.
Here's an example Bash command you could use to compile a single-file program:
g++ foo.cpp $(pkg-config --cflags --libs openblas) -o foo
I am using cmake 3.10.2. I have both openmpi and mpich installed. However I need to load only mpich. So I found from the documentation the following
MPI_EXECUTABLE_SUFFIX
A suffix which is appended to all names that are being looked for.
For instance you may set this to .mpich or .openmpi to prefer the one
or the other on Debian and its derivatives.
My CMake file goes like this
set(MPI_EXECUTABLE_SUFFIX ".mpich")
FIND_PACKAGE(MPI REQUIRED)
INCLUDE_DIRECTORIES(${MPI_INCLUDE_DIRS})
LINK_DIRECTORIES(${MPI_LIBRARY_DIRS})
message(${MPI_INCLUDE_PATH})
However this shows
/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/usr/lib/x86_64-linux-gnu/openmpi/include...
Where am I going wrong. Could you please help me with this
Also
mpicc -show
gcc -I/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi -I/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/opal/mca/event/libevent2022/libevent -I/usr/lib/x86_64-linux-gnu/openmpi/include/openmpi/opal/mca/event/libevent2022/libevent/include -I/usr/lib/x86_64-linux-gnu/openmpi/include -pthread -L/usr//lib -L/usr/lib/x86_64-linux-gnu/openmpi/lib -lmpi
mpicc.mpich -show
gcc -Wl,-Bsymbolic-functions -Wl,-z,relro -I/usr/include/mpich -L/usr/lib/x86_64-linux-gnu -lmpich
the best is to use modules for switch between openmpi and mpich:
$ module load mpich
$ module unload mpich
$ module load openmpi
http://modules.sourceforge.net/
The default mpicc is not your choice. You can specify it manually in the cmake file, or update the $PATH variable with your mpicc included before the default one. Personally, I installed the mpich in the /usr/local/ directory.
Regards
I'm trying to compile the "Source Code (.c)" example from this tutorial.
I have installed mruby using rbenv: rbenv install mruby-1.2.0
I get an error when trying to compile the program:
$ gcc -std=c99 -Imruby/include test_program.c -o test_program
test_program.c:1:10: fatal error: 'mruby.h' file not found
#include "mruby.h"
^
1 error generated.
How am I supposed to reference the mruby library when installing via rbenv/ruby-build?
Seems like rbenv install mruby-1.2.0 doesn't install header files of mruby(it's only a dump of build/host directory after mruby is built):
% ls $(rbenv prefix mruby-1.2.0)
LEGAL bin lib mrbgems mrblib src
You need
# get mruby's code
git clone https://github.com/mruby/mruby.git mruby
# build mruby
cd mruby && rake
# go back to directory of `test_program.c`
cd ..
before test_program.c's compilation instead.
And you need mruby/build/host/lib/libmruby.a -lm compile options too.
add -lm
in mruby is /include directory in my source is possible -I mruby_directory/include
next add ~/mruby/build/host/lib/libmruby.a
I want to generate a dll file in MinGW, I have several object dependencies in order to do that, one of my object dependencies is libdl.so, I add this object in unix simply as :
g++ xx.o yy.o /usr/lib/libdl.so -o module.so
but in MinGW, I don't have any idea how to add this object. any ideas?
There is a MinGW port of libdl that you can use just like under Unix. Quote from the website:
This library implements a wrapper for dlfcn, as specified in POSIX and SUS, around the dynamic link library functions found in the Windows API.
It requires MinGW to build.
You may get pre-built binaries (with MinGW gcc 3.4.5) and a bundled source code from the Downloads section.
The following commands build and install it in a standard MinGW installation (to be run from your MinGW shell):
./configure --prefix=/ --libdir=/lib --incdir=/include && make && make install
To compile your library as a DLL, use the following command:
g++ -shared xx.o yy.o -ldl -o module.dll
I encountered the same problem (msys2, 32bit version of compiler etc.).
For me I found out that the libdl.a was available in /usr/lib but not in /mingw32/lib. I was able to solve the problem by linking it to the /mingw32/lib folder:
ln -s /usr/lib/libdl.a /mingw32/lib
Assuming you have your .h and .m ready on a Linux server, which command would you issue to GCC to have it compiled?
The relevant parts:
gcc -c -Wno-import List.m
gcc -o prog -Wno-import List.o main.o -lobjc
. . . make sure that the Objective-C library and header files (objc/Object.h) were installed when gcc was built.
Note that when linking Objective-C with gcc, you need to specify the Objective-C library by using the -lobjc switch.
See this link for more information.
Additional link with possible solution to the missing compiler issue:
Try installing either gobjc++ or gobjc
sudo apt-get install gobjc++
gcc -x objective-c file.m -o out
Google is your friend