| # Check the handling of timestamps on output files. |
| |
| # Check that a command which overwrites one of its inputs before its output is |
| # only run once. This happens for the 'LLVMBuild.cmake' part of the LLVM |
| # generator step, for example. |
| # |
| # RUN: rm -rf %t.build |
| # RUN: mkdir -p %t.build |
| # RUN: cp %s %t.build/build.ninja |
| # RUN: touch %t.build/input |
| # RUN: %{llbuild} ninja build --chdir %t.build &> %t1.out |
| # RUN: %{FileCheck} --check-prefix CHECK-FIRST --input-file %t1.out %s |
| # CHECK-FIRST: [1/{{.*}}] GENERATOR |
| # |
| # RUN: %{llbuild} ninja build --chdir %t.build &> %t2.out |
| # RUN: %{FileCheck} --check-prefix CHECK-SECOND --input-file %t2.out %s |
| # CHECK-SECOND-NOT: GENERATOR |
| |
| # We use `touch -r ...` here to ensure a timestamp on the input which is strictly |
| # older than the output. |
| rule GENERATOR |
| command = date >> input && touch -r / input && date >> output |
| description = GENERATOR |
| |
| build output: GENERATOR input |
