lib/std/Build.zig                                             |  25 ++--
 lib/std/Build/Module.zig                                      |  21 +--
 lib/std/Build/Step/Compile.zig                                | 229 +++++++++++++++++++++++---------
 lib/std/Build/Step/InstallArtifact.zig                        |  95 ++++++++++---
 lib/std/Build/Step/InstallDir.zig                             |  23 ++--
 lib/std/Build/Step/InstallFile.zig                            |  11 +-
 lib/std/Build/Step/WriteFile.zig                              | 134 ++++++++++++++++++-
 test/standalone.zig                                           |   4 +
 test/standalone/install_headers/build.zig                     |  99 ++++++++++++++
 test/standalone/install_headers/check_exists.zig              |  37 ++++++
 test/standalone/install_headers/include/a.h                   |   1 +
 test/standalone/install_headers/include/ignore_me.txt         |   1 +
 test/standalone/install_headers/include/sub_dir/b.h           |   1 +
 test/standalone/install_headers/include/sub_dir/c.ignore_me.h |   1 +
 14 files changed, 542 insertions(+), 140 deletions(-)