[leotada]

Summary of Changes

This PR modernizes the RPM packaging in linux/dmd_rpm.sh to fix compatibility on openSUSE Leap 16, openSUSE Tumbleweed, Rocky Linux / RHEL, and Fedora:

1. RPM Boolean Rich Dependencies (Requires:):

   • Replaced distro-specific names with explicit boolean dependencies: (libcurl($FARCH) or libcurl4($FARCH)) and (libgcc($FARCH) or libgcc_s1($FARCH)).
   • On openSUSE Leap 16+, libcurl4 is used (there is no libcurl or libcurl4-32bit). On Fedora/RHEL, libcurl is used. This allows the RPM packages to be cross-compatible across all RPM-based distros.

2. 32-bit Multilib Isolation & Weak Dependencies (Recommends:):

   • Bundled 32-bit Phobos (/usr/lib/libphobos2.so*) previously caused RPM's find-requires to inject an automatic 32-bit Requires: libgcc_s.so.1 into the 64-bit package, which fails on standard 64-bit systems where 32-bit libgcc_s.so.1 is not installed by default. Added %global __requires_exclude_from ^/usr/lib/libphobos2\\.so.*$ on x86_64 to prevent this leak.
   • Converted 32-bit development dependencies (glibc-devel(x86-32) or glibc-devel-32bit, libgcc(x86-32) or libgcc_s1-32bit, libcurl(x86-32) or libcurl4-32bit) from hard Requires: to Recommends:. This prevents installation failures on 64-bit-only installations while still pulling in multilib packages when requested/available.
   • Fixed typo in openSUSE 32-bit dependencies: gcc-32bit($FARCH) evaluated to non-existent gcc-32bit(x86-64).

3. Smooth openSUSE Upgrades (Provides: & Obsoletes:):

   • Added Provides and Obsoletes for phobos-devel, phobos-devel-static, and dub to prevent file conflicts when upgrading over openSUSE's distribution-split packages.

4. Build System Compatibility:

   • Updated OS verification to recognize /etc/os-release so dmd_rpm.sh can be executed on any modern Linux distribution.
   • Made fakeroot optional if rpmbuild is already installed.
   • Defined _topdir and _tmppath to ensure clean builds in unprivileged or containerized build environments.

[dejlek]

Tested on Fedora 44, Leap 16, Tumbleweed, Alma 8 and 9 with dmd 2.110.0. It works, with one bug.

The 32-bit require exclusion does the job. Without it the 32-bit libphobos pulls libgcc_s.so.1 and friends into the 64-bit package. Rich deps resolve on all of these distros. Leap 16 upgrades over the distro split stack cleanly. The fakeroot and _topdir/_tmppath changes work too.

The bug: Obsoletes: libphobos2-0_109 is hardcoded, but this script builds every release. A 2.110 build has soname .so.0.110, and Tumbleweed already ships libphobos2-0_113. Derive the name from SO_VERSION instead.

Smaller stuff:

• Recommends are installed by default, so 32-bit multilib still gets pulled on Fedora/EL. Use Suggests for "only when requested".
• The DUB_VER fallback writes the dmd version into dub's Provides/Obsoletes. That is the wrong version namespace.
• Obsoletes: dub < $DUB_VER misses when the distro dub is newer, so /usr/bin/dub still conflicts.
• /etc/os-release exists everywhere, so the new check passes everywhere. Drop it or check ID_LIKE.
• Rich deps need rpm 4.13, so RHEL 7 cannot install this. Say RHEL 8+ in the readme.

[leotada]

Thanks a lot for the thorough review and testing across the 5 container distributions, @dejlek!

I have addressed all the points in the latest commit (5b0f0cc):

1. Derived PHOBOS_LIB_PKG dynamically:
   • Now derived using PHOBOS_LIB_PKG="libphobos2-$(echo $SO_VERSION | tr . _)" with Obsoletes: $PHOBOS_LIB_PKG <= $VERSION-$REVISION so it properly tracks the soname for any DMD release.
2. Switched to Suggests::
   • Converted 32-bit multilib development packages to Suggests: instead of Recommends: so that dnf / zypper do not pull 32-bit packages by default on 64-bit systems.
3. DUB version fallback:
   • Removed the $VERSION fallback to avoid mixing DMD and DUB version namespaces. If usr/bin/dub version cannot be extracted dynamically, it now provides unversioned dub, dub($FARCH).
4. OS check verification:
   • Updated the /etc/os-release check to inspect ID and ID_LIKE (debian|rhel|fedora|suse|centos|rocky|alma).
5. README:
   • Updated the documentation to explicitly specify RHEL/Rocky/CentOS 8+ (due to RPM >= 4.13 requirement for boolean rich dependencies).

[dejlek]

Retested the new commit. The obsoletes name, Suggests, the os-release check and the readme are all good now.

Two things left. Obsoletes: dub <= $DUB_VER still misses a newer distro dub. On Tumbleweed the upgrade aborts on a /usr/bin/dub conflict when the distro dub is newer than the bundled one. An unversioned Obsoletes: dub is the only reliable fix. And the dub version goes into the metadata unchecked. When dub --version printed something unexpected I got dub = run-0 in Provides and Obsoletes. Validate the format and fall back when it does not match.

One behavior change worth knowing: the derived obsoletes name means a soname bump leaves the old libphobos2 package orphaned. Harmless, since the file names differ, but different from before.