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| author | Peter Collingbourne <peter@pcc.me.uk> | 2011-11-15 04:39:52 (GMT) |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2012-02-02 23:36:49 (GMT) |
| commit | 7eb8d9036c73784f14da9d8381023c1e26df1275 (patch) | |
| tree | 6d6be598e8850d3bc95a9247cef05a24cfa27de1 | |
| parent | 4468edf12b0b87e32768fcdce7abd30afddcad7b (diff) | |
| download | CMake-7eb8d9036c73784f14da9d8381023c1e26df1275.zip CMake-7eb8d9036c73784f14da9d8381023c1e26df1275.tar.gz CMake-7eb8d9036c73784f14da9d8381023c1e26df1275.tar.bz2 | |
Provide dependency file flags to generator
Causes compiler modules (currently only GNU) to set a
CMAKE_DEPFILE_FLAGS_${lang} variable, which communicates to
the generator the flags required to cause the compiler to create
dependency files.
| -rw-r--r-- | Modules/Compiler/GNU.cmake | 9 | ||||
| -rw-r--r-- | Tests/BuildDepends/CMakeLists.txt | 2 |
2 files changed, 11 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU.cmake b/Modules/Compiler/GNU.cmake index 8d6f5df..bdcaf9d 100644 --- a/Modules/Compiler/GNU.cmake +++ b/Modules/Compiler/GNU.cmake @@ -24,6 +24,15 @@ macro(__compiler_gnu lang) set(CMAKE_SHARED_LIBRARY_${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") diff --git a/Tests/BuildDepends/CMakeLists.txt b/Tests/BuildDepends/CMakeLists.txt index 31392b5..aa32d67 100644 --- a/Tests/BuildDepends/CMakeLists.txt +++ b/Tests/BuildDepends/CMakeLists.txt @@ -40,6 +40,8 @@ if("${CMAKE_GENERATOR}" MATCHES "Make") endif() list(APPEND _cmake_options "-DTEST_LINK_DEPENDS=${TEST_LINK_DEPENDS}") +list(APPEND _cmake_options "-DCMAKE_FORCE_DEPFILES=1") + file(MAKE_DIRECTORY ${BuildDepends_BINARY_DIR}/Project) message("Creating Project/foo.cxx") write_file(${BuildDepends_BINARY_DIR}/Project/foo.cxx |