datatypes package fails to build in Octave 11.1.0 on Void Linux: libgomp.spec error

Is this a new report?

Yes

System Info

Void 6.12.79_1 x86_64 GenuineIntel uptodate rr

Package(s) Affected

octave-datatypes

Does a report exist for this bug with the project's home (upstream) and/or another distro?

Package: octave-datatypes 1.2.2
Octave version: 11.1.0
System: Void Linux x86_64

When installing via 'pkg install datatypes', compilation fails:

g++: fatal error: cannot read spec file 'libgomp.spec'
compilation terminated.
make: *** [Makefile:15: all] Error 1

Notes:

• g++ 14.2.1 and libgomp 14.2.1 are installed
• mkoctfile shows -fopenmp in ALL_CXXFLAGS but not in ALL_LDFLAGS
• Temporary fix: export CXXFLAGS="-fopenmp" LDFLAGS="-fopenmp" CXX=g++

This seems related to Void Linux gcc toolchain and library paths.

Expected behaviour

The octave-datatypes package should compile and install without errors, allowing the use of table() and other datatypes functionality in Octave 11.1.0.

Actual behaviour

The compilation fails with a fatal error related to libgomp.spec:

g++: fatal error: cannot read spec file 'libgomp.spec'
compilation terminated.
make: *** [Makefile:15: all] Error 1

Even though g++ and libgomp are installed, the package does not link OpenMP properly, preventing successful installation.

Steps to reproduce

1. Install Octave 11.1.0 on Void Linux x86_64.
2. Ensure g++ and libgomp are installed.
3. Run 'pkg install -forge datatypes'.
4. Observe fatal error: 'cannot read spec file libgomp.spec'.

Start with the octave-datatypes build output and the Makefile target reported at line 15, then compare the mkoctfile OpenMP flags with the temporary CXXFLAGS and LDFLAGS workaround. The work is done when pkg install -forge datatypes builds and installs successfully on Void Linux with g++ and libgomp installed.