Example for ephemeral_cc_sources

testdata/e/BUILD

@@ -0,0 +1,12 @@
+[
+{ "cc_library": {
+    "name": "print-build-timestamp",
+    "ephemeral_cc_sources": [ "print-build-timestamp.c" ],
+    "cc_compile_args": [ "-DBUILD_TIMESTAMP=\\\"\"$(date --rfc-3339=seconds)\"\\\"" ]
+} },
+{ "cc_binary": {
+    "name": "main",
+    "cc_sources": [ "main.c" ],
+    "dependencies": [ ":print-build-timestamp" ]
+} }
+]

testdata/e/main.c

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+extern void print_build_timestamp();
+
+int main(int argc, char* argv[]) {
+  print_build_timestamp();
+  return 0;
+}

testdata/e/print-build-timestamp.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+void print_build_timestamp() {
+  printf("Built on %s\n", BUILD_TIMESTAMP);
+}