mfem: Add camp to libraries #2910
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When MFEM is build with `+umpire~shared~examples`, MFEM still calls
```
make("-C", "examples", "ex1p" if ("+mpi" in self.spec) else "ex1",
parallel=False)
```
This compilation fails with errors like:
```
/usr/bin/ld: /home/ubuntu/opt/spack/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_plac/linux-x86_64_v3/umpire-2025.09.0-l6vuanc7nlbfgjkteq2movqh24nhrafo/lib/libumpire.a(ResourceAwarePool.cpp.o): in function `umpire::strategy::ResourceAwarePool::allocate_resource(unsigned long, camp::resources::v1::Resource)':
ResourceAwarePool.cpp:(.text+0x7683): undefined reference to `camp::throw_re(char const*)'
/usr/bin/ld: /home/ubuntu/opt/spack/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_plac/linux-x86_64_v3/umpire-2025.09.0-l6vuanc7nlbfgjkteq2movqh24nhrafo/lib/libumpire.a(ResourceAwarePool.cpp.o): in function `umpire::strategy::ResourceAwarePool::deallocate_resource(void*, camp::resources::v1::Resource, unsigned long)':
ResourceAwarePool.cpp:(.text+0xae45): undefined reference to `camp::throw_re(char const*)'
/usr/bin/ld: /home/ubuntu/opt/spack/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_placeholder__/__spack_path_plac/linux-x86_64_v3/umpire-2025.09.0-l6vuanc7nlbfgjkteq2movqh24nhrafo/lib/libumpire.a(ResourceAwarePool.cpp.o): in function `camp::resources::v1::Resource::ContextModel<camp::resources::v1::Host>::compare(camp::resources::v1::Resource const&) const':
ResourceAwarePool.cpp:(.text._ZNK4camp9resources2v18Resource12ContextModelINS1_4HostEE7compareERKS2_[_ZNK4camp9resources2v18Resource12ContextModelINS1_4HostEE7compareERKS2_]+0x3c): undefined reference to `camp::throw_re(char const*)'
collect2: error: ld returned 1 exit status
make: *** [makefile:86: ex1p] Error 1
make: Leaving directory '/tmp/ubuntu/spack-stage/spack-stage-mfem-develop-bqp7664gmcfp6szafha3xabjyvcwv3ig/spack-src/examples'
```
This does not occur for shared builds because of transitive linking (I
guess). A simple way to fix this is ensuring that camp is explicitely
linked when available.
alalazo
approved these changes
Jan 7, 2026
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When MFEM is build with
+umpire~shared~examples, MFEM still callsThis compilation fails with errors like:
This does not occur for shared builds because of transitive linking (I guess). A simple way to fix this is ensuring that camp is explicitely linked when available.