lib/std/Build/Step/ConfigHeader.zig        | 154 +++++++++++++++++++++++++++++---
 test/standalone.zig                        |   4 +
 test/standalone/cmakedefine/build.zig      |  56 ++++++++++++
 test/standalone/cmakedefine/config.h.cmake |  93 +++++++++++++++++++
 test/standalone/cmakedefine/expected.h     |  93 +++++++++++++++++++
 5 files changed, 386 insertions(+), 14 deletions(-)