From: "Anthony J. Bentley" <bentley@openbsd.org>
Subject: Poison ccache and sccache
To: ports@openbsd.org
Date: Wed, 09 Sep 2026 04:59:46 -0600

There are probably still several ports with hidden deps on ccache.
This should catch them.

If upstream has a knob to turn off ccache, the port should use it.
If there isn't one, we can at least add an explicit build dependency.

ok?


--- infrastructure/mk/bsd.port.mk
+++ infrastructure/mk/bsd.port.mk
@@ -452,7 +452,8 @@ CCACHE_DIR ?= ${WRKOBJDIR_${PKGPATH}}/.ccache
 MAKE_ENV += CCACHE_DIR=${CCACHE_DIR} ${CCACHE_ENV}
 CONFIGURE_ENV += CCACHE_DIR=${CCACHE_DIR}
 # scons cleans the environment when calling the compiler
-COMPILER_WRAPPER += env CCACHE_DIR=${CCACHE_DIR} ${CCACHE_ENV} ccache
+COMPILER_WRAPPER += env CCACHE_DIR=${CCACHE_DIR} ${CCACHE_ENV} \
+	${LOCALBASE}/bin/ccache
 .  if !exists(${LOCALBASE}/bin/ccache)
 ERRORS += "Fatal: USE_CCACHE is set, but ccache is not installed."
 .  endif
@@ -2783,6 +2784,13 @@ ${_WRKDIR_COOKIE}:
 	@${_PBUILD} mkdir -p ${WRKDIR} ${WRKDIR}/bin
 	@${_wrap_install_commands}
 # poison some common binaries unless the relevant BUILD_DEPENDS is used
+.if empty(_BUILD_DEP:Mdevel/ccache) && \
+		empty(_BUILD_DEP:Mdevel/ccache)
+	@printf '#!/bin/sh\n\
+		echo "*** $$0 was called without devel/ccache dependency ***" >&2\n\
+		exit 1\n' ${_PREDIR} ${WRKDIR}/bin/ccache
+	@${_PBUILD} chmod 555 ${WRKDIR}/bin/ccache
+.endif
 .if empty(_BUILD_DEP:Mdevel/gettext,-tools) && \
 		empty(_BUILD_DEP:Mtextproc/intltool)
 	@printf '#!/bin/sh\n\
@@ -2793,6 +2801,13 @@ ${_WRKDIR_COOKIE}:
 	@${_PBUILD} ln -sf msgfmt ${WRKDIR}/bin/${name}
 .  endfor
 .endif
+.if empty(_BUILD_DEP:Mdevel/sccache) && \
+		empty(_BUILD_DEP:Mdevel/sccache)
+	@printf '#!/bin/sh\n\
+		echo "*** $$0 was called without devel/sccache dependency ***" >&2\n\
+		exit 1\n' ${_PREDIR} ${WRKDIR}/bin/sccache
+	@${_PBUILD} chmod 555 ${WRKDIR}/bin/sccache
+.endif
 .if empty(_BUILD_DEP:Mtextproc/asciidoc)
 	@printf '#!/bin/sh\n\
 		echo "*** $$0 was called without textproc/asciidoc dependency ***" >&2\n\