Package depends on mpich, cannot be installed because nothing provides libmpi.so.12

Question

I have some software that uses MPI. I have created an RPM package from that.

The requirements are such that mpich and mpich-devel are included:

BuildRequires:  libstdc++-devel autoconf gcc-c++ automake qmp qmp-devel environment-modules mpich-devel
BuildRequires:  libxml2-devel
Requires:       libstdc++ libxml2 qmp environment-modules mpich

(full spec file)

When I then try to install that via my Open Build Service home project, it tells me that the required library is not available:

# LC_ALL=C dnf install qdpxx qdpxx-devel --refresh --allowerasing
Error: nothing provides libmpi.so.12()(64bit) needed by qdpxx-1.44.0.git131-16.1.x86_64

The library is installed on my system, albeit not in a default path:

$ ls -l /usr/lib64/mpich/lib/
insgesamt 2780
lrwxrwxrwx. 1 root root      13 31. Mär 2016  libfmpich.so -> libmpifort.so*
lrwxrwxrwx. 1 root root      12 31. Mär 2016  libmpichcxx.so -> libmpicxx.so*
lrwxrwxrwx. 1 root root      13 31. Mär 2016  libmpichf90.so -> libmpifort.so*
lrwxrwxrwx. 1 root root       9 31. Mär 2016  libmpich.so -> libmpi.so*
lrwxrwxrwx. 1 root root      19 31. Mär 2016  libmpicxx.so -> libmpicxx.so.12.1.0*
lrwxrwxrwx. 1 root root      19 31. Mär 2016  libmpicxx.so.12 -> libmpicxx.so.12.1.0*
-rwxr-xr-x. 1 root root  134088 31. Mär 2016  libmpicxx.so.12.1.0*
lrwxrwxrwx. 1 root root      20 31. Mär 2016  libmpifort.so -> libmpifort.so.12.1.0*
lrwxrwxrwx. 1 root root      20 31. Mär 2016  libmpifort.so.12 -> libmpifort.so.12.1.0*
-rwxr-xr-x. 1 root root  228128 31. Mär 2016  libmpifort.so.12.1.0*
lrwxrwxrwx. 1 root root      16 31. Mär 2016  libmpi.so -> libmpi.so.12.1.0*
lrwxrwxrwx. 1 root root      16 31. Mär 2016  libmpi.so.12 -> libmpi.so.12.1.0*
-rwxr-xr-x. 1 root root 2474552 31. Mär 2016  libmpi.so.12.1.0*
lrwxrwxrwx. 1 root root       9 31. Mär 2016  libmpl.so -> libmpi.so*
lrwxrwxrwx. 1 root root       9 31. Mär 2016  libopa.so -> libmpi.so*
drwxr-xr-x. 2 root root    4096  5. Dez 18:08 pkgconfig/

What is missing? How do I get the package to recognize that mpich indeed provides the library libmpi.so.12?

---

$ rpm -q --provides mpich
libmpi.so.12()(64bit)(mpich-x86_64)
libmpicxx.so.12()(64bit)(mpich-x86_64)
libmpifort.so.12()(64bit)(mpich-x86_64)
mpi
mpich = 3.2-6.fc25
mpich(x86-64) = 3.2-6.fc25
mpich2 = 3.2

Answer 1

The answer is in the packaging guidelines:

MPI implementation specific files MUST be installed in the directories used by the used MPI compiler ($MPI_BIN, $MPI_LIB and so on).

For mpich, binaries must be in /usr/lib64/mpich/bin.