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tools/Zig.defs: Fix Zig builds on sim:x86_64

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Building Zig applications on sim:x86_64 with Zig 0.13.0 fails because
the generated target "x86_64-freestanding-sysv" is not recognized by
Zig. Introduce a Zig-specific ABI mapping that translates "sysv" to
"gnu" without affecting other toolchains.

After correcting the target ABI, linking still fails due to unresolved
references to __zig_probe_stack. Add -fcompiler-rt so Zig includes the
required compiler runtime during linking.

Verified on sim:nsh with CONFIG_EXAMPLES_HELLO_ZIG=y:

  nsh> hello_zig
  [sim]: Hello, Zig!

Fixes #19475

Signed-off-by: Ansh Rai <anshrai331@gmail.com>
This commit is contained in:
Ansh Rai 2026-07-19 06:58:36 +00:00 • committed by Xiang Xiao
parent f2186e2c3d
commit 522ae4cb3f
1 changed files with 9 additions and 1 deletions
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10
tools/Zig.defs
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@ -36,7 +36,13 @@ else ifeq ($(CONFIG_ARCH_RISCV),y)
ZIGFLAGS += -mcmodel=medium
else
ZIGFLAGS := -target $(LLVM_ARCHTYPE)-freestanding-$(LLVM_ABITYPE)
ifeq ($(LLVM_ABITYPE),sysv)
ZIG_ABITYPE := gnu
else
ZIG_ABITYPE := $(LLVM_ABITYPE)
endif
ZIGFLAGS := -target $(LLVM_ARCHTYPE)-freestanding-$(ZIG_ABITYPE)
endif
# Convert cortex-xxx/sifive-exx to cortex_xxx/sifive_exx
@ -44,3 +50,5 @@ endif
ifneq ($(LLVM_CPUTYPE),)
ZIGFLAGS += -mcpu $(subst -,_,$(LLVM_CPUTYPE))
endif
ZIGFLAGS += -fcompiler-rt