From 4ac4593192fda74ba065d5421ae3551b811c9973 Mon Sep 17 00:00:00 2001
From: Wildan Mubarok <willnode@wellosoft.net>
Date: Thu, 3 Jul 2025 13:21:08 +0000
Subject: [PATCH] Support build with sccache in podman

---
 mk/config.mk          | 19 ++++++++++++++++++-
 podman/rustinstall.sh |  3 +++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/mk/config.mk b/mk/config.mk
index 1dc21d9b5..c1b43a7a7 100644
--- a/mk/config.mk
+++ b/mk/config.mk
@@ -31,6 +31,8 @@ HOST_CARGO=env -u RUSTUP_TOOLCHAIN -u CC -u TARGET cargo
 REDOXFS_MKFS_FLAGS?=
 ## Set to 1 to enable Podman build, any other value will disable it
 PODMAN_BUILD?=1
+## Enable sccache to speed up cargo builds
+SSCACHE_BUILD?=1
 ## The containerfile to use for the Podman base image
 CONTAINERFILE?=podman/redox-base-containerfile
 
@@ -41,9 +43,17 @@ export REDOX_MAKE=make
 ifneq ($(PODMAN_BUILD),1)
 HOST_TARGET := $(shell env -u RUSTUP_TOOLCHAIN rustc -vV | grep host | cut -d: -f2 | tr -d " ")
 ifneq ($(HOST_TARGET),x86_64-unknown-linux-gnu)
-	# The binary prefix is only built for x86_64 Linux hosts
+	$(info The binary prefix is only built for x86_64 Linux hosts)
 	PREFIX_BINARY=0
 endif
+
+ifeq ($(SSCACHE_BUILD),1)
+ifeq (,$(shell command -v sccache))
+	$(info sccache not found in PATH)
+	SSCACHE_BUILD=0
+endif
+endif
+
 endif
 
 UNAME := $(shell uname)
@@ -112,6 +122,13 @@ RANLIB=$(GNU_TARGET)-gcc-ranlib
 READELF=$(GNU_TARGET)-readelf
 STRIP=$(GNU_TARGET)-strip
 
+ifeq ($(SSCACHE_BUILD),1)
+	CC_WRAPPER:=sccache
+	CC=$(CC_WRAPPER) $(GNU_TARGET)-gcc
+	CXX=$(CC_WRAPPER) $(GNU_TARGET)-g++
+	export RUSTC_WRAPPER:=$(CC_WRAPPER)
+endif
+
 ## Rust cross compile variables
 export AR_$(subst -,_,$(TARGET)):=$(AR)
 export CC_$(subst -,_,$(TARGET)):=$(CC)
diff --git a/podman/rustinstall.sh b/podman/rustinstall.sh
index 2fce22bdb..def5c2b53 100755
--- a/podman/rustinstall.sh
+++ b/podman/rustinstall.sh
@@ -7,3 +7,6 @@ curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable
 cargo +stable install --force --version 0.1.1 cargo-config
 cargo +stable install --force --version 1.16.0 just
 cargo +stable install --force --version 0.27.0 cbindgen
+
+SCCACHE_PATH=https://github.com/mozilla/sccache/releases/download/v0.10.0/sccache-v0.10.0-$(uname -m)-unknown-linux-musl.tar.gz
+curl -sSL $(SCCACHE_PATH) | tar -xz -C ~/.cargo/bin --strip-components=1 --wildcards '*/sccache'