How to re-install system libraries using different compilation options? Is it safe?

jay.cross.bee · 12-14-2023, 08:13 PM

I'm trying to learn whether I can re-install a static library (fltk) as a shared library. I'm trying to install gmsh (and several modules for it) from source and the instructions recommend having fltk as a shared library.

There are a few other library recommendations, too, that already are in lib or usr/lib.

What should I do? Can I build them from source and install them in home/me/local and then adjust my path to use them when I build the gmsh and the supporting programs?

Any advice?

I'm running Kubuntu 23.10 with 6.5.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC Tue Nov 14 14:59:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux.

jayjwa · 12-14-2023, 09:29 PM

I wouldn't overwrite your fltk system install. I saw your other thread and that fltk doesn't look right. I'd be surprised if Kubuntu doesn't have a full fltk install. You should have stuff like

Code:

...
usr/include/FL/mac.H
usr/include/FL/math.h
usr/include/FL/names.h
usr/include/FL/platform.H
usr/include/FL/win32.H
usr/include/FL/x.H
usr/lib64/
usr/lib64/libfltk.so.1.3
usr/lib64/libfltk_cairo.so.1.3
usr/lib64/libfltk_forms.so.1.3
usr/lib64/libfltk_gl.so.1.3
usr/lib64/libfltk_images.so.1.3
...

not a bunch of cmake files in /usr/lib. It's probably in multiple packages, with a "dev" and a regular one. Try to build against that.

boughtonp · 12-15-2023, 09:09 AM

Quote:

Originally Posted by jayjwa

It's probably in multiple packages, with a "dev" and a regular one. Try to build against that.

Ubuntu uses the same tools as Debian, which allows anyone to query package information online without having it installed, and confirm stuff like this.

libfltk1.3 only has a single SO, but the -dev package has the files you mention (only in /usr/lib/x86_64-linux-gnu instead of /usr/lib64):

//packages.ubuntu.com/mantic/amd64/libfltk1.3/filelist
//packages.ubuntu.com/mantic/amd64/libfltk1.3-dev/filelist

jay.cross.bee · 12-16-2023, 01:20 PM

Code:

$ ls /lib/fltk/
CMakeCache.txt  FLTKConfig.cmake      FLTK-Targets.cmake       FLTKUse.cmake
CMakeFiles      FLTK-Functions.cmake  FLTK-Targets-none.cmake  UseFLTK.cmake

Code:

$ ls /usr/lib/fltk/
CMakeCache.txt  FLTKConfig.cmake      FLTK-Targets.cmake       FLTKUse.cmake
CMakeFiles      FLTK-Functions.cmake  FLTK-Targets-none.cmake  UseFLTK.cmake

When I type fltk and hit [TAB] twice, here is the output:

Code:

$ fltk-config

Then this:

Code:

$ fltk-config 
Usage: fltk-config [OPTIONS]
Options:
        [--version]
        [--api-version]

Options telling what we are doing:
        [--use-gl]        use GL
        [--use-images]    use extra image formats (PNG, JPEG)
        [--use-glut]      use glut compatibility layer
        [--use-forms]     use forms compatibility layer
        [--use-cairo]     use cairo graphics lib

Options telling what information we request:
        [--cc]            return C compiler used to compile FLTK
        [--cxx]           return C++ compiler used to compile FLTK
        [--optim]         return compiler optimization used to compile FLTK
        [--cflags]        return flags to compile C using FLTK
        [--cxxflags]      return flags to compile C++ using FLTK
        [--ldflags]       return flags to link against FLTK
        [--ldstaticflags] return flags to link against static FLTK library
                                          even if there are DSOs installed
        [--libs]          return FLTK libraries full path for dependencies
        [--prefix]        return FLTK install time --prefix directory
        [--includedir]    return FLTK install time include directory

Options to compile and link an application:
        [-g]              compile the program with debugging information
        [-Dname[=value]]  compile the program with the given define
        [--compile program.cxx]
        [--post program]  prepare the program for desktop use