diff options
Diffstat (limited to 'Modules/Compiler/GNU.cmake')
| -rw-r--r-- | Modules/Compiler/GNU.cmake | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake index 8d6f5df..bdcaf9d 100644 --- a/Modules/Compiler/GNU.cmake +++ b/Modules/Compiler/GNU.cmake @@ -24,6 +24,15 @@ macro(__compiler_gnu lang) set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-fPIC") set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-shared") + # Older versions of gcc (< 4.5) contain a bug causing them to report a missing + # header file as a warning if depfiles are enabled, causing check_header_file + # tests to always succeed. Work around this by disabling dependency tracking + # in try_compile mode. + GET_PROPERTY(_IN_TC GLOBAL PROPERTY IN_TRY_COMPILE) + if(NOT _IN_TC OR CMAKE_FORCE_DEPFILES) + set(CMAKE_DEPFILE_FLAGS_${lang} "-MMD -MF <DEPFILE>") + endif() + # Initial configuration flags. set(CMAKE_${lang}_FLAGS_INIT "") set(CMAKE_${lang}_FLAGS_DEBUG_INIT "-g") |