$ cat Dockerfile
FROM alpine:3.17.2
RUN apk add clang dtc git lld llvm make
WORKDIR /build
RUN git clone https://review.trustedfirmware.org/TF-A/trusted-firmware-a .
RUN clang --version && make CC=/usr/bin/clang PLAT=rk3399 all

$ podman build -t bugreport .  # can also use docker instead of podman, with same arguments
STEP 1/5: FROM alpine:3.17.2
STEP 2/5: RUN apk add clang dtc git lld llvm make
--> Using cache 9386d44a36410aa76daf761e3e75ce638b8782f54cf897eef1675ed6d4f1f649
--> Pushing cache []:d80bd5a6f9048c013a209283311585fbbab722b18323105ab86b9fb8660623d1
--> 9386d44a364
STEP 3/5: WORKDIR /build
--> Using cache 277730fd1c506b28b45283eda0a11cfa735ab17e74da32aeee2751653736be48
--> Pushing cache []:0aa8c313cb0f5b8ac9a5ae744d97946d08fa43077248c1cc6e124727b36467f0
--> 277730fd1c5
STEP 4/5: RUN git clone https://review.trustedfirmware.org/TF-A/trusted-firmware-a .
--> Using cache 100c3f6a17702d65e423970cfb14378c13f81b90f91ef3948f69f2aeb29da59e
--> Pushing cache []:d3ff8c1a704aa940ec90f707b159f0e1191f4babc03b3bcf7da2fc523f05e642
--> 100c3f6a177
STEP 5/5: RUN clang --version && make CC=/usr/bin/clang PLAT=rk3399 all
Alpine clang version 15.0.7
Target: x86_64-alpine-linux-musl
Thread model: posix
InstalledDir: /usr/bin
  CC      lib/libfdt/fdt.c
  CC      lib/libfdt/fdt_addresses.c
  CC      lib/libfdt/fdt_empty_tree.c
  CC      lib/libfdt/fdt_ro.c
  CC      lib/libfdt/fdt_rw.c
  CC      lib/libfdt/fdt_strerror.c
  CC      lib/libfdt/fdt_sw.c
  CC      lib/libfdt/fdt_wip.c
  AR      /build/build/rk3399/release/lib/libfdt.a
Building rk3399
  CC      lib/libc/abort.c
  CC      lib/libc/assert.c
  CC      lib/libc/exit.c
  CC      lib/libc/memchr.c
  CC      lib/libc/memcmp.c
  CC      lib/libc/memcpy.c
  CC      lib/libc/memmove.c
  CC      lib/libc/memrchr.c
  CC      lib/libc/memset.c
  CC      lib/libc/printf.c
  CC      lib/libc/putchar.c
  CC      lib/libc/puts.c
  CC      lib/libc/snprintf.c
  CC      lib/libc/strchr.c
  CC      lib/libc/strcmp.c
  CC      lib/libc/strlcat.c
  CC      lib/libc/strlcpy.c
  CC      lib/libc/strlen.c
  CC      lib/libc/strncmp.c
  CC      lib/libc/strnlen.c
  CC      lib/libc/strrchr.c
  CC      lib/libc/strtok.c
  CC      lib/libc/strtoul.c
  CC      lib/libc/strtoll.c
  CC      lib/libc/strtoull.c
  CC      lib/libc/strtol.c
  AS      lib/libc/aarch64/setjmp.S
  AR      /build/build/rk3399/release/lib/libc.a
  CC      bl31/bl31_context_mgmt.c
  CC      bl31/bl31_main.c
  CC      bl31/bl31_traps.c
  CC      bl31/interrupt_mgmt.c
  CC      common/runtime_svc.c
  CC      drivers/arm/cci/cci.c
  CC      drivers/arm/gic/v3/arm_gicv3_common.c
  CC      drivers/arm/gic/v3/gic-x00.c
  CC      drivers/arm/gic/v3/gicdv3_helpers.c
  CC      drivers/arm/gic/v3/gicrv3_helpers.c
  CC      drivers/arm/gic/v3/gicv3_helpers.c
  CC      drivers/arm/gic/v3/gicv3_main.c
  CC      drivers/delay_timer/delay_timer.c
  CC      drivers/delay_timer/generic_delay_timer.c
  CC      drivers/gpio/gpio.c
  CC      lib/cpus/errata_report.c
  CC      lib/el3_runtime/aarch64/context_mgmt.c
  CC      lib/el3_runtime/cpu_data_array.c
  CC      lib/extensions/spe/spe.c
  CC      lib/locks/bakery/bakery_lock_coherent.c
  CC      lib/psci/psci_common.c
  CC      lib/psci/psci_main.c
  CC      lib/psci/psci_mem_protect.c
  CC      lib/psci/psci_off.c
  CC      lib/psci/psci_on.c
  CC      lib/psci/psci_setup.c
  CC      lib/psci/psci_suspend.c
  CC      lib/psci/psci_system_off.c
  CC      plat/common/plat_gicv3.c
  CC      plat/rockchip/common/aarch64/platform_common.c
  CC      plat/rockchip/common/bl31_plat_setup.c
  CC      plat/rockchip/common/params_setup.c
  CC      plat/rockchip/common/plat_pm.c
  CC      plat/rockchip/common/plat_topology.c
  CC      plat/rockchip/common/rockchip_gicv3.c
  CC      plat/rockchip/common/rockchip_sip_svc.c
  CC      plat/rockchip/rk3399/drivers/dram/dfs.c
  CC      plat/rockchip/rk3399/drivers/dram/dram.c
  CC      plat/rockchip/rk3399/drivers/dram/dram_spec_timing.c
plat/rockchip/rk3399/drivers/dram/dram_spec_timing.c:781:11: error: explicitly assigning value of variable of type 'uint32_t' (aka 'unsigned int') to itself [-Werror,-Wself-assign]
                twr_tmp = twr_tmp;
                ~~~~~~~ ^ ~~~~~~~
1 error generated.
make: *** [Makefile:1390: /build/build/rk3399/release/bl31/dram_spec_timing.o] Error 1
Error: building at STEP "RUN clang --version && make CC=/usr/bin/clang PLAT=rk3399 all": while running runtime: exit status 2