Arch Linux User Repository

I see FLTK1.3 was added as makedepend, thank you! I did some further work for cmake to detect that version, otherwise it keeps using FLTK1.4.

...
prepare() {
  cd "${srcdir}/${pkgname}-${pkgver}-source"
  # Help links to local doc (package gmsh-docs)
  sed -e "s|https://gmsh.info/doc/texinfo/|file:///usr/share/doc/gmsh/|" \
    -i src/fltk/graphicWindow.cpp
  sed -e "s|https://gmsh.info/dev/doc/texinfo/|file:///usr/share/doc/gmsh/|" \
    -i src/fltk/graphicWindow.cpp
  sed -e "s|https://gmsh.info/|file:///usr/share/licenses/gmsh/|" \
    -i src/fltk/helpWindow.cpp
  # Go to line 627 and change fltk-config to fltk-config1.3
  # Save and exit nano to continue compiling.
  nano CMakeList.txt
}
...
package_gmsh() {
  depends=(alglib ann cairo cgns fltk1.3 glu lapack med-openmpi metis opencascade)
...

Now FLTK1.3 is properly detected but when reaching practically the end of the build process I get this

...
[100%] Building CXX object CMakeFiles/gmsh.dir/api/gmshc.cpp.o
[100%] Linking CXX executable gmsh
/bin/ld: CMakeFiles/gmsh.dir/src/fltk/visibilityWindow.cpp.o: referencia sin definir al símbolo «_ZN7Fl_TreeC2EiiiiPKc»
/bin/ld: /usr/lib/libfltk.so.1.3: error al añadir símbolos: Falta DSO en la línea de ordenes
collect2: error: ld devolvió el estado de salida 1
make[2]: *** [CMakeFiles/gmsh.dir/build.make:11023: gmsh] Error 1
make[1]: *** [CMakeFiles/Makefile2:798: CMakeFiles/gmsh.dir/all] Error 2
make: *** [Makefile:156: all] Error 2

It's in Spanish but basically it says that «_ZN7Fl_TreeC2EiiiiPKc» is an undefined symbol and that a DSO is missing from command line, but I don't know if this is an error in the FLTK1.3 library or something else has to be modified to the cmake files before starting the building process.

Gmsh is very slow when mouse hovering, see here https://hpc.montefiore.ulg.ac.be/gmsh/gmsh/-/issues/1313. According to release notes, since v4.14 they compile with FLTK 1.3 instead of the current version to solve this. FLTK1.3 is available in extra repository, but how should I modify the Pkgbuild to force that version instead of the current one (both versions will be present in my system)?

@Aurelius_Nero You can write a patch file and incorporate it in your PKGBUILD, if you want to install it a package. Alternatively, in case you are fine not to have it as a package, you can compile gmsh manually after changing the files.

@Tomatopaste I am getting the same error. I have tried changing the files as suggested in the error report. However, I am using yay and it always resets the build files. How do I rectify this error using yay?

I ran into an issue compiling gmsh with gcc 15.1. Again, it has been already reported here https://gitlab.onelab.info/gmsh/gmsh/-/issues/3276 and here https://gitlab.onelab.info/gmsh/gmsh/-/issues/3270

/usr/lib/gcc/x86_64-pc-linux-gnu/15.1.1/include/omp.h:527:1: error: template with C linkage
  527 | template<typename __T>
      | ^~~~~~~~
gmsh/src/gmsh-4.13.1-source/src/mesh/meshGRegionHxt.cpp:27:1: note: ‘extern "C"’ linkage started here
   27 | extern "C" {
      | ^~~~~~~~~~

Hi @opamp22. Your issue has been reported here https://gitlab.onelab.info/gmsh/gmsh/-/issues/3297

There is Cmake error when building gmsh.

==> Making package: gmsh 4.13.1-2 (Sat 26 Apr 2025 23:26:30)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
==> Starting build()...
CMake Error at CMakeLists.txt:6 (cmake_minimum_required):
  Compatibility with CMake < 3.5 has been removed from CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
  to tell CMake that the project requires at least <min> but has been updated
  to work with policies introduced by <max> or earlier.

  Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.

Hi @xtlc, see https://gitlab.onelab.info/gmsh/gmsh/-/issues/3158

This fails miserably :(

[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_OCC.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_MSH.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_MSH2.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_MSH3.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_MSH4.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_VTK.cpp.o
[  8%] Building CXX object CMakeFiles/shared.dir/src/geo/GModelIO_CGNS.cpp.o
In file included from /tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/CGNSCommon.h:16,
                 from /tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/GModelIO_CGNS.cpp:9:
/usr/include/cgnslib.h:632:23: error: ‘Pair’ redeclared as different kind of entity
  632 |   CGNS_ENUMV( Pair ) =7,
      |                       ^
In file included from /tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/GFace.h:19,
                 from /tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/GModel.h:18,
                 from /tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/GModelIO_CGNS.cpp:8:
/tmp/packerbuild-1000/gmsh/gmsh/src/gmsh-4.13.1-source/src/geo/Pair.h:10:35: note: previous declaration ‘template<class L, class R> class Pair’
   10 | template <class L, class R> class Pair {
      |                                   ^~~~
make[2]: *** [CMakeFiles/shared.dir/build.make:1675: CMakeFiles/shared.dir/src/geo/GModelIO_CGNS.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:794: CMakeFiles/shared.dir/all] Error 2
make: *** [Makefile:166: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
The build failed.

I do not even have an idea where to start here :)

@TheBigBadBoy no issue from my side, please try again.