diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4de1a9b99198c178c6f8fbfc57b7802dbc311847..fbd8673ce48b00f22cd95d79200de3f27403614f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -787,6 +787,11 @@ else()
   set(ZIG_WASM2C_COMPILE_FLAGS "-std=c99 -O2")
   set(ZIG1_COMPILE_FLAGS "-std=c99 -Os")
   set(ZIG2_COMPILE_FLAGS "-std=c99 -O0 -fno-sanitize=undefined -fno-stack-protector")
+  # Must match the condition in build.zig.
+  if(ZIG_HOST_TARGET_ARCH MATCHES "^powerpc(64)?(le)?$")
+    set(ZIG1_COMPILE_FLAGS "${ZIG1_COMPILE_FLAGS} -ffunction-sections -fdata-sections")
+    set(ZIG2_COMPILE_FLAGS "${ZIG2_COMPILE_FLAGS} -ffunction-sections -fdata-sections")
+  endif()
   if(APPLE)
     set(ZIG2_LINK_FLAGS "-Wl,-stack_size,0x10000000")
   elseif(MINGW)
diff --git a/build.zig b/build.zig
index 342c2cfada354e9cccda63484ed9252b7bcafe67..2311f879a42153e79056f180fa0d50b381ac9ba0 100644
--- a/build.zig
+++ b/build.zig
@@ -838,6 +838,12 @@ fn addCompilerStep(b: *std.Build, options: AddCompilerModOptions) *std.Build.Ste
     });
     exe.stack_size = stack_size;
 
+    // Must match the condition in CMakeLists.txt.
+    const function_data_sections = options.target.result.cpu.arch.isPowerPC();
+
+    exe.link_function_sections = function_data_sections;
+    exe.link_data_sections = function_data_sections;
+
     return exe;
 }