==== Versions of LLVM ====

There are many versions of [[http://portsmon.freebsd.org/portoverview.py?category=&portname=llvm&wildcard=yes|llvm]] in the ports tree.

  * It is painful for builders (especially the ones using qemu) to have so many versions.
  * Some only exist to satisfy dependencies.

This page discusses the list of ports that we should try to update to reduce the dependencies.

==== Notes on versions ====

:!: **devel/llvm10** is actually version 10.0, and thus is sorted here //after// **devel/llvm90**, which is version 9.0.  The same caveat will apply for **devel/llvm11** and all subsequent versions.

==== Current versions in the tree ====

:!: The **usage** column does not include ports that hardwire the version. See [[HardcodedLLVMVersions]] for that list.

| port | usage | status | comments |
| llvm70 | USES=obj (mostly gnustep-derived ports) | obsolete | defined in [[https://svnweb.freebsd.org/ports/head/Mk/Uses/objc.mk?view=markup|Mk/Uses/objc.mk]]; last changed as of [[https://svnweb.freebsd.org/ports?view=revision&revision=492056|r492056]] |
| llvm80 |  | supported |  |
| llvm90 | tree-wide default | supported | defined in [[https://svnweb.freebsd.org/ports/head/Mk/bsd.default-versions.mk?view=markup|Mk/bsd.default-versions.mk]] |
| llvm10 | fallback via USES=xyz for GCC-based systems | supported | defined in [[https://svnweb.freebsd.org/ports/head/Mk/Uses/compiler.mk?view=markup|Uses/compiler.mk]] |
| llvm11 | experimental | supported |  |

==== Dependency statistics ====

Processing **INDEX-13** 20210124 (and deleting self-references) produces:

<code>
  6 /tmp/llvm60
 33 /tmp/llvm70
  9 /tmp/llvm80
121 /tmp/llvm90
170 /tmp/llvm10
  0 /tmp/llvm11
</code>

==== Default version ====

For architectures that support llvm in base, the default version is determined by whatever is installed in base.

For other architectures, if a port sets USES=compiler, llvm10 will be set if:

  * COMPILER_ARGS:Mc++17-lang
  * COMPILER_ARGS:Mc++14-lang
  * COMPILER_ARGS:Mc++11-lang
  * COMPILER_ARGS:Mc++0x
  * COMPILER_ARGS:Mc11

See [[https://svnweb.freebsd.org/ports/head/Mk/Uses/compiler.mk?view=markup|Mk/Uses/compiler.mk]] for the code.

all the below has become obsolete 20191202:

==== Table of obsolescence (tier-1) ====

| port | dependency | upstream URL | upstream at later version? | comments |

:!: TODO add more 20190807

==== Table of obsolescence (tier-2) ====

:!: These data are stale.

Here are the data from powerpc64 INDEX-13 built 20181214.  As of this date, the base compiler is still gcc4.2.1.

| llvm40 | 5 |  |
| llvm60 | 169 |  |
| llvm70 | 13 |  |

----

{{tag>Ports Todo}}