MantisBT - CMake
I'm working on a C++ project that's been happily using CMake as a
cross-platform (mac/pc/linux) build tool for a year now.
We're using CMake 2.4.6 on all platforms.
Recently, some changes in our build system lead to the following
dependency graph:
LIB1 <- EXE1 <- LIB2 <- EXE2
^ |
`---------------------'
(LIB* are static libraries, and EXE* executables)
EXE1 is a tool that generates input source files for LIB2, hence the
extra-dependency.
Everything works nice and smooth with the Linux / Make, MacOS X / Make
and WIN32 / VC80 generators.
Trouble is, on the mac, the XCODE_DEPEND_HELPER (XDH) is added to all
final (executable, dynamic libraries and modules) targets by the XCode
generator:
.-----------------------------
v \
LIB1 <-------. |
EXE1 <- LIB2 <- EXE2
XDH <-------' |
^------------------------------'
When EXE2 (or ALL_BUILD) is the active target and LIB2 needs a
rebuild, the following happens:
* The XCODE_DEPEND_HELPER make command is run, doing nothing.
* EXE1 is left alone
* LIB2 gets correctly rebuilt
* EXE2 does not get relinked because when XCODE_DEPEND_HELPER was run,
EXE2 was still up-to-date with LIB2 :-(
This is very annoying.
Here's the only sort-of workaround I could come up with:
* remove the EXE1 <- LIB2 dependency, so that EXE2 gets correctly
relinked when the active target is EXE2
* exclude EXE1 from the build (using EXCLUDE_FROM_ALL), so that EXE2
gets correctly relinked when the active target is ALL_BUILD
But this forces XCode users to rebuild EXE1 manually.
CMakeBug.tar.gz (1,155) 2007-12-21 09:21https://public.kitware.com/Bug/file/1266/CMakeBug.tar.gz