<div dir="auto">ok, thanks<div dir="auto">by the way what about my ctags rule? how can i get the include path of an app? so that i can pass it to ctags and have my tags produced?</div><div dir="auto">thanks and regards</div><div dir="auto">jlm</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mer. 3 juil. 2019 à 16:52, Robert Maynard <<a href="mailto:robert.maynard@kitware.com">robert.maynard@kitware.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I completely forgot that the Makefiles based generators in CMake have<br>
a separate heuristic for determining system headers.<br>
<br>
If you use the Ninja generator I see the expected behavior:<br>
~/W/t/nbuild $ sudo touch /usr/include/c++/7/array<br>
~/W/t/nbuild $ ninja -d explain -v<br>
ninja explain: output test/CMakeFiles/ProjTest.dir/test.cpp.o older<br>
than most recent input /usr/include/c++/7/array (1562165327 vs<br>
1562165329)<br>
ninja explain: test/CMakeFiles/ProjTest.dir/test.cpp.o is dirty<br>
ninja explain: test/ProjTest is dirty<br>
[1/2] /usr/bin/c++ -I../my_lib/include -std=gnu++1z -MD -MT<br>
test/CMakeFiles/ProjTest.dir/test.cpp.o -MF<br>
test/CMakeFiles/ProjTest.dir/test.cpp.o.d -o<br>
test/CMakeFiles/ProjTest.dir/test.cpp.o -c ../test/test.cpp<br>
[2/2] : && /usr/bin/c++ test/CMakeFiles/ProjTest.dir/test.cpp.o<br>
-o test/ProjTest && :<br>
<br>
<br>
I will need to spend some more time figuring out the extra include<br>
caching logic for the Makefile based generators, and will report back.<br>
<br>
On Thu, Jun 27, 2019 at 8:59 AM jl forums <<a href="mailto:jlmxyz.forums@gmail.com" target="_blank" rel="noreferrer">jlmxyz.forums@gmail.com</a>> wrote:<br>
><br>
> thanks for the anwer....<br>
> quite not... I'm using cmake 3.14.2 (so, far away from 3.6....) and have a look, in main.cpp, there is #include <filesystem>:<br>
><br>
> $ find /usr/include/ -name filesystem<br>
> /usr/include/c++/5/experimental/filesystem<br>
> /usr/include/c++/7/experimental/filesystem<br>
> /usr/include/c++/8/filesystem<br>
> /usr/include/c++/8/experimental/filesystem<br>
> $ sudo touch /usr/include/c++/5/experimental/filesystem /usr/include/c++/7/experimental/filesystem /usr/include/c++/8/filesystem /usr/include/c++/8/experimental/filesystem<br>
> $ make<br>
> [100%] Built target FileSync<br>
> $ touch ../main.cxx<br>
> $ make<br>
> Scanning dependencies of target FileSync<br>
> [ 50%] Building CXX object CMakeFiles/FileSync.dir/main.cxx.o<br>
> [100%] Linking CXX executable FileSync<br>
> [100%] Built target FileSync<br>
><br>
><br>
> => cmake don't create "full include dependency" which IS a mistake.... updating system g++ can just assume the target is uptodate and in fact just create a broken build...<br>
><br>
> in cmake cxx.includecache<br>
><br>
> #IncludeRegexLine: ^[ ]*[#%][ ]*(include|import)[ ]*[<"]([^">]+)([">])<br>
> #IncludeRegexScan: ^.*$<br>
> #IncludeRegexComplain: ^$<br>
> #IncludeRegexTransform:<br>
> /home/orange/crypt/Devel/projets/FileSync/main.cxx<br>
> cstdio<br>
> -<br>
> io.h<br>
> -<br>
> fcntl.h<br>
> -<br>
> locale<br>
> -<br>
> clocale<br>
> -<br>
> fstream<br>
> -<br>
> iostream<br>
> -<br>
> filesystem<br>
> -<br>
><br>
> $ /usr/bin/gcc-8 -M ../main.cxx<br>
> main.o: ../main.cxx /usr/x86_64-linux-gnu/include/stdc-predef.h \<br>
> /usr/include/c++/8/cstdio \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/c++config.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/os_defines.h \<br>
> /usr/x86_64-linux-gnu/include/features.h \<br>
> /usr/x86_64-linux-gnu/include/sys/cdefs.h \<br>
> /usr/x86_64-linux-gnu/include/bits/wordsize.h \<br>
> /usr/x86_64-linux-gnu/include/bits/long-double.h \<br>
> /usr/x86_64-linux-gnu/include/gnu/stubs.h \<br>
> /usr/x86_64-linux-gnu/include/gnu/stubs-64.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/cpu_defines.h \<br>
> /usr/x86_64-linux-gnu/include/stdio.h \<br>
> /usr/x86_64-linux-gnu/include/bits/libc-header-start.h \<br>
> /usr/lib/gcc/x86_64-linux-gnu/8/include/stddef.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types.h \<br>
> /usr/x86_64-linux-gnu/include/bits/typesizes.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/__FILE.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/FILE.h \<br>
> /usr/x86_64-linux-gnu/include/bits/libio.h \<br>
> /usr/x86_64-linux-gnu/include/bits/_G_config.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/__mbstate_t.h \<br>
> /usr/lib/gcc/x86_64-linux-gnu/8/include/stdarg.h \<br>
> /usr/x86_64-linux-gnu/include/bits/stdio_lim.h \<br>
> /usr/x86_64-linux-gnu/include/bits/sys_errlist.h \<br>
> /usr/include/c++/8/locale /usr/include/c++/8/bits/localefwd.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/c++locale.h \<br>
> /usr/include/c++/8/clocale /usr/x86_64-linux-gnu/include/locale.h \<br>
> /usr/x86_64-linux-gnu/include/bits/locale.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/locale_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/__locale_t.h \<br>
> /usr/include/c++/8/iosfwd /usr/include/c++/8/bits/stringfwd.h \<br>
> /usr/include/c++/8/bits/memoryfwd.h /usr/include/c++/8/bits/postypes.h \<br>
> /usr/include/c++/8/cwchar /usr/x86_64-linux-gnu/include/wchar.h \<br>
> /usr/x86_64-linux-gnu/include/bits/floatn.h \<br>
> /usr/x86_64-linux-gnu/include/bits/floatn-common.h \<br>
> /usr/x86_64-linux-gnu/include/bits/wchar.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/wint_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/mbstate_t.h \<br>
> /usr/include/c++/8/cctype /usr/x86_64-linux-gnu/include/ctype.h \<br>
> /usr/x86_64-linux-gnu/include/endian.h \<br>
> /usr/x86_64-linux-gnu/include/bits/endian.h \<br>
> /usr/x86_64-linux-gnu/include/bits/byteswap.h \<br>
> /usr/x86_64-linux-gnu/include/bits/byteswap-16.h \<br>
> /usr/x86_64-linux-gnu/include/bits/uintn-identity.h \<br>
> /usr/include/c++/8/bits/locale_classes.h /usr/include/c++/8/string \<br>
> /usr/include/c++/8/bits/char_traits.h \<br>
> /usr/include/c++/8/bits/stl_algobase.h \<br>
> /usr/include/c++/8/bits/functexcept.h \<br>
> /usr/include/c++/8/bits/exception_defines.h \<br>
> /usr/include/c++/8/bits/cpp_type_traits.h \<br>
> /usr/include/c++/8/ext/type_traits.h \<br>
> /usr/include/c++/8/ext/numeric_traits.h \<br>
> /usr/include/c++/8/bits/stl_pair.h /usr/include/c++/8/bits/move.h \<br>
> /usr/include/c++/8/bits/concept_check.h /usr/include/c++/8/type_traits \<br>
> /usr/include/c++/8/bits/stl_iterator_base_types.h \<br>
> /usr/include/c++/8/bits/stl_iterator_base_funcs.h \<br>
> /usr/include/c++/8/debug/assertions.h \<br>
> /usr/include/c++/8/bits/stl_iterator.h \<br>
> /usr/include/c++/8/bits/ptr_traits.h /usr/include/c++/8/debug/debug.h \<br>
> /usr/include/c++/8/bits/predefined_ops.h /usr/include/c++/8/cstdint \<br>
> /usr/lib/gcc/x86_64-linux-gnu/8/include/stdint.h \<br>
> /usr/x86_64-linux-gnu/include/stdint.h \<br>
> /usr/x86_64-linux-gnu/include/bits/stdint-intn.h \<br>
> /usr/x86_64-linux-gnu/include/bits/stdint-uintn.h \<br>
> /usr/include/c++/8/bits/allocator.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/c++allocator.h \<br>
> /usr/include/c++/8/ext/new_allocator.h /usr/include/c++/8/new \<br>
> /usr/include/c++/8/exception /usr/include/c++/8/bits/exception.h \<br>
> /usr/include/c++/8/bits/exception_ptr.h \<br>
> /usr/include/c++/8/bits/cxxabi_init_exception.h \<br>
> /usr/include/c++/8/typeinfo /usr/include/c++/8/bits/hash_bytes.h \<br>
> /usr/include/c++/8/bits/nested_exception.h \<br>
> /usr/include/c++/8/bits/ostream_insert.h \<br>
> /usr/include/c++/8/bits/cxxabi_forced.h \<br>
> /usr/include/c++/8/bits/stl_function.h \<br>
> /usr/include/c++/8/backward/binders.h \<br>
> /usr/include/c++/8/bits/range_access.h \<br>
> /usr/include/c++/8/initializer_list \<br>
> /usr/include/c++/8/bits/basic_string.h \<br>
> /usr/include/c++/8/ext/atomicity.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/gthr.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/gthr-default.h \<br>
> /usr/x86_64-linux-gnu/include/pthread.h \<br>
> /usr/x86_64-linux-gnu/include/sched.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/time_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/struct_timespec.h \<br>
> /usr/x86_64-linux-gnu/include/bits/sched.h \<br>
> /usr/x86_64-linux-gnu/include/bits/cpu-set.h \<br>
> /usr/x86_64-linux-gnu/include/time.h \<br>
> /usr/x86_64-linux-gnu/include/bits/time.h \<br>
> /usr/x86_64-linux-gnu/include/bits/timex.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/struct_timeval.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/clock_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/struct_tm.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/clockid_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/timer_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/struct_itimerspec.h \<br>
> /usr/x86_64-linux-gnu/include/bits/pthreadtypes.h \<br>
> /usr/x86_64-linux-gnu/include/bits/thread-shared-types.h \<br>
> /usr/x86_64-linux-gnu/include/bits/pthreadtypes-arch.h \<br>
> /usr/x86_64-linux-gnu/include/bits/setjmp.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/atomic_word.h \<br>
> /usr/include/c++/8/ext/alloc_traits.h \<br>
> /usr/include/c++/8/bits/alloc_traits.h \<br>
> /usr/include/c++/8/ext/string_conversions.h /usr/include/c++/8/cstdlib \<br>
> /usr/x86_64-linux-gnu/include/stdlib.h \<br>
> /usr/x86_64-linux-gnu/include/bits/waitflags.h \<br>
> /usr/x86_64-linux-gnu/include/bits/waitstatus.h \<br>
> /usr/x86_64-linux-gnu/include/sys/types.h \<br>
> /usr/x86_64-linux-gnu/include/sys/select.h \<br>
> /usr/x86_64-linux-gnu/include/bits/select.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/sigset_t.h \<br>
> /usr/x86_64-linux-gnu/include/bits/types/__sigset_t.h \<br>
> /usr/x86_64-linux-gnu/include/sys/sysmacros.h \<br>
> /usr/x86_64-linux-gnu/include/bits/sysmacros.h \<br>
> /usr/x86_64-linux-gnu/include/alloca.h \<br>
> /usr/x86_64-linux-gnu/include/bits/stdlib-float.h \<br>
> /usr/include/c++/8/bits/std_abs.h /usr/include/c++/8/cerrno \<br>
> /usr/x86_64-linux-gnu/include/errno.h \<br>
> /usr/x86_64-linux-gnu/include/bits/errno.h \<br>
> /usr/x86_64-linux-gnu/include/linux/errno.h \<br>
> /usr/x86_64-linux-gnu/include/asm/errno.h \<br>
> /usr/x86_64-linux-gnu/include/asm-generic/errno.h \<br>
> /usr/x86_64-linux-gnu/include/asm-generic/errno-base.h \<br>
> /usr/include/c++/8/bits/functional_hash.h \<br>
> /usr/include/c++/8/bits/basic_string.tcc \<br>
> /usr/include/c++/8/bits/locale_classes.tcc \<br>
> /usr/include/c++/8/bits/locale_facets.h /usr/include/c++/8/cwctype \<br>
> /usr/x86_64-linux-gnu/include/wctype.h \<br>
> /usr/x86_64-linux-gnu/include/bits/wctype-wchar.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/ctype_base.h \<br>
> /usr/include/c++/8/bits/ios_base.h /usr/include/c++/8/system_error \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/error_constants.h \<br>
> /usr/include/c++/8/stdexcept /usr/include/c++/8/streambuf \<br>
> /usr/include/c++/8/bits/streambuf.tcc \<br>
> /usr/include/c++/8/bits/streambuf_iterator.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/ctype_inline.h \<br>
> /usr/include/c++/8/bits/locale_facets.tcc \<br>
> /usr/include/c++/8/bits/locale_facets_nonio.h /usr/include/c++/8/ctime \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/time_members.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/messages_members.h \<br>
> /usr/x86_64-linux-gnu/include/libintl.h \<br>
> /usr/include/c++/8/bits/codecvt.h \<br>
> /usr/include/c++/8/bits/locale_facets_nonio.tcc \<br>
> /usr/include/c++/8/bits/locale_conv.h \<br>
> /usr/include/c++/8/bits/unique_ptr.h /usr/include/c++/8/utility \<br>
> /usr/include/c++/8/bits/stl_relops.h /usr/include/c++/8/tuple \<br>
> /usr/include/c++/8/array /usr/include/c++/8/bits/uses_allocator.h \<br>
> /usr/include/c++/8/bits/invoke.h /usr/include/c++/8/fstream \<br>
> /usr/include/c++/8/istream /usr/include/c++/8/ios \<br>
> /usr/include/c++/8/bits/basic_ios.h \<br>
> /usr/include/c++/8/bits/basic_ios.tcc /usr/include/c++/8/ostream \<br>
> /usr/include/c++/8/bits/ostream.tcc /usr/include/c++/8/bits/istream.tcc \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/basic_file.h \<br>
> /usr/include/x86_64-linux-gnu/c++/8/bits/c++io.h \<br>
> /usr/include/c++/8/bits/fstream.tcc /usr/include/c++/8/iostream \<br>
> /usr/include/c++/8/filesystem<br>
><br>
><br>
> amazing, no? cmake find only 9 dependencies against 100+ real ones (and I don't even speak of errors that can be caused in parsing if some -D option is changed....<br>
><br>
> thanks and regards<br>
> JLM<br>
><br>
><br>
> Le lun. 24 juin 2019 à 14:14, Robert Maynard <<a href="mailto:robert.maynard@kitware.com" target="_blank" rel="noreferrer">robert.maynard@kitware.com</a>> a écrit :<br>
>><br>
>> It look that starting with CMake 3.6 modification of system headers<br>
>> will cause CMake to recompile projects. What version of CMake and your<br>
>> compiler are you using?<br>
>><br>
>> On Mon, Jun 17, 2019 at 9:40 AM jl forums <<a href="mailto:jlmxyz.forums@gmail.com" target="_blank" rel="noreferrer">jlmxyz.forums@gmail.com</a>> wrote:<br>
>> ><br>
>> > Hi,<br>
>> > I want to create a full tag file and for this require to know the compiler full include path... there is a way to had custom includes path but didn't found any variables for the include path....<br>
>> > for example :<br>
>> > $ gcc-8 -v -x c -E /dev/null<br>
>> > Using built-in specs.<br>
>> > [....]<br>
>> > ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"<br>
>> > #include "..." search starts here:<br>
>> > #include <...> search starts here:<br>
>> > /usr/lib/gcc/x86_64-linux-gnu/8/include<br>
>> > /usr/local/include<br>
>> > /usr/lib/gcc/x86_64-linux-gnu/8/include-fixed<br>
>> > /usr/x86_64-linux-gnu/include<br>
>> > /usr/include/x86_64-linux-gnu<br>
>> > /usr/include<br>
>> > End of search list.<br>
>> > [...]<br>
>> ><br>
>> > $ gcc -v -x c -E /dev/null<br>
>> > Using built-in specs.<br>
>> > [...]<br>
>> > ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"<br>
>> > #include "..." search starts here:<br>
>> > #include <...> search starts here:<br>
>> > /usr/lib/gcc/x86_64-linux-gnu/7/include<br>
>> > /usr/local/include<br>
>> > /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed<br>
>> > /usr/x86_64-linux-gnu/include<br>
>> > /usr/include/x86_64-linux-gnu<br>
>> > /usr/include<br>
>> > End of search list.<br>
>> > [...]<br>
>> ><br>
>> > I tried to<br>
>> ><br>
>> ><br>
>> > get_target_property(moggle_interface_includes FileSync INTERFACE_INCLUDE_DIRECTORIES)<br>
>> > message("Moggle interface includes: ${moggle_interface_includes}")<br>
>> ><br>
>> > get_target_property(motor_includes FileSync INCLUDE_DIRECTORIES)<br>
>> > message("MOTOR includes ${motor_includes}")<br>
>> ><br>
>> > but I get<br>
>> ><br>
>> > Moggle interface includes: moggle_interface_includes-NOTFOUND<br>
>> > MOTOR includes motor_includes-NOTFOUND<br>
>> ><br>
>> ><br>
>> > there is also some issue because cmake strip dependencies from system's include, which means that updating a system software won't cause rebuild and consider that the build is uptodate, causing unexpected results<br>
>> > seems that there is ways to workaround this : <a href="https://stackoverflow.com/questions/7461000/handling-header-files-dependencies-with-cmake" rel="noreferrer noreferrer" target="_blank">https://stackoverflow.com/questions/7461000/handling-header-files-dependencies-with-cmake</a> but this is ugly... would be better to let the user choose with an option<br>
>> ><br>
>> > thanks and regards<br>
>> > JLM<br>
>> > --<br>
>> ><br>
>> > Powered by <a href="http://www.kitware.com" rel="noreferrer noreferrer" target="_blank">www.kitware.com</a><br>
>> ><br>
>> > Please keep messages on-topic and check the CMake FAQ at: <a href="http://www.cmake.org/Wiki/CMake_FAQ" rel="noreferrer noreferrer" target="_blank">http://www.cmake.org/Wiki/CMake_FAQ</a><br>
>> ><br>
>> > Kitware offers various services to support the CMake community. For more information on each offering, please visit:<br>
>> ><br>
>> > CMake Support: <a href="http://cmake.org/cmake/help/support.html" rel="noreferrer noreferrer" target="_blank">http://cmake.org/cmake/help/support.html</a><br>
>> > CMake Consulting: <a href="http://cmake.org/cmake/help/consulting.html" rel="noreferrer noreferrer" target="_blank">http://cmake.org/cmake/help/consulting.html</a><br>
>> > CMake Training Courses: <a href="http://cmake.org/cmake/help/training.html" rel="noreferrer noreferrer" target="_blank">http://cmake.org/cmake/help/training.html</a><br>
>> ><br>
>> > Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" rel="noreferrer noreferrer" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
>> ><br>
>> > Follow this link to subscribe/unsubscribe:<br>
>> > <a href="https://cmake.org/mailman/listinfo/cmake" rel="noreferrer noreferrer" target="_blank">https://cmake.org/mailman/listinfo/cmake</a><br>
</blockquote></div>