scripts: sphinx-pre-install: update mandatory system deps

To build docs, gcc is not needed. Also, Kernel can be built
nowadays with clang. So, drop it.

On the other hand, which is needed. Add a system dependency
for it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/4ec979e4692c9e4acd6c31424c0e2f4bf5b80e71.1754992972.git.mchehab+huawei@kernel.org

diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index 7dfe5c2..fc9dc45 100755 (executable)
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -1476,7 +1476,7 @@ class SphinxDependencyChecker(MissingCheckers):
         self.check_perl_module("Pod::Usage", DepManager.SYSTEM_MANDATORY)
 
         self.check_program("make", DepManager.SYSTEM_MANDATORY)
-        self.check_program("gcc", DepManager.SYSTEM_MANDATORY)
+        self.check_program("which", DepManager.SYSTEM_MANDATORY)
 
         self.check_program("dot", DepManager.SYSTEM_OPTIONAL)
         self.check_program("convert", DepManager.SYSTEM_OPTIONAL)