diff options
Diffstat (limited to 'cmake/bison.cmake')
| -rw-r--r-- | cmake/bison.cmake | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/cmake/bison.cmake b/cmake/bison.cmake index d5c725fbbde..0892a213d04 100644 --- a/cmake/bison.cmake +++ b/cmake/bison.cmake @@ -47,6 +47,21 @@ MACRO (RUN_BISON input_yy output_cc output_h) ENDIF() ENDIF() IF(BISON_USABLE) + # Workaround for VS regenerating output even + # when outputs are up-to-date. At least, fix output timestamp + # after build so that files that depend on generated header are + # not rebuilt. + IF(CMAKE_GENERATOR MATCHES "Visual Studio") + FIND_PROGRAM(TOUCH_EXECUTABLE touch DOC "Path to touch executable" + PATHS "C:/Program Files/Git/usr/bin" + "C:/Program Files (x86)/Git/usr/bin") + IF(TOUCH_EXECUTABLE) + SET(VS_FIX_OUTPUT_TIMESTAMPS + COMMAND ${TOUCH_EXECUTABLE} -r ${input_yy} ${output_cc} + COMMAND ${TOUCH_EXECUTABLE} -r ${input_yy} ${output_h}) + ENDIF() + ENDIF() + ADD_CUSTOM_COMMAND( OUTPUT ${output_cc} ${output_h} @@ -54,8 +69,9 @@ MACRO (RUN_BISON input_yy output_cc output_h) --output=${output_cc} --defines=${output_h} ${input_yy} - DEPENDS ${input_yy} - ) + ${VS_FIX_OUTPUT_TIMESTAMPS} + DEPENDS ${input_yy} + ) ELSE() # Bison is missing or not usable, e.g too old IF(EXISTS ${output_cc} AND EXISTS ${output_h}) |