git: c94edcebb6 - main - [phb] Document USES=llvm

The branch main has been updated by fernape:

URL: https://cgit.FreeBSD.org/doc/commit/?id=c94edcebb622c4a35405f591f242132db534cd7b

commit c94edcebb622c4a35405f591f242132db534cd7b
Author:     Fernando Apesteguía <fernape@FreeBSD.org>
AuthorDate: 2022-12-18 16:29:36 +0000
Commit:     Fernando Apesteguía <fernape@FreeBSD.org>
CommitDate: 2022-12-18 17:06:16 +0000

    [phb] Document USES=llvm
    
    Which was introduced in:
    https://cgit.FreeBSD.org/ports/commit/?id=2b3e37f30c249db5e9957c3ee41c25dea3191fc5
    
    Reviewed by:    tcberner@
    Differential Revision:  https://reviews.freebsd.org/D37737
---
 .../en/books/porters-handbook/uses/_index.adoc     | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/documentation/content/en/books/porters-handbook/uses/_index.adoc b/documentation/content/en/books/porters-handbook/uses/_index.adoc
index eb30fe397d..ff44f7ae20 100644
--- a/documentation/content/en/books/porters-handbook/uses/_index.adoc
+++ b/documentation/content/en/books/porters-handbook/uses/_index.adoc
@@ -1075,6 +1075,30 @@ Specify `c7` to depend on CentOS 7 packages. The available packages are:
 * `ucl`
 * `xorglibs`
 
+[[uses-llvm]]
+== `llvm`
+
+Possible arguments: (none), `_XY_`, min=`_XY_`, max=`_XY_`, build, run, lib
+
+Adds a dependency on LLVM.
+By default this is a build dependency unless overridden by the `run` or `lib`
+options.
+The default version is the one set in `LLVM_DEFAULT`. A specific version can be
+specified as well. The minimum and maximum versions can be specified with the
+`min` and `max` parameters respectively.
+The ports framework export the following variables to the port:
+
+`LLVM_VERSION`::
+Version chosen from the arguments to llvm.mk
+`LLVM_PORT`::
+Chosen llvm port
+`LLVM_CONFIG`::
+llvm-config of the chosen port
+`LLVM_LIBLLVM`::
+libLLVM.so of the chosen port
+`LLVM_PREFIX`::
+Installation prefix of the chosen port
+
 [[uses-localbase]]
 == `localbase`