[cmake-developers] cmake --help-policy CMP0057 MAIN_DEPENDENCY
Nils Gladitz
nilsgladitz at gmail.com
Thu Apr 30 11:42:41 EDT 2015
On 29.04.2015 09:11, Nils Gladitz wrote:
> The policy will likely have to be removed or replaced.
I reverted the MAIN_DEPENDENCY specific CMP0057 commits and replaced the
policy with an unrelated one that is part of my "if-IN_LIST" topic to
fill the gap.
This leaves the original issues that prompted the creation of CMP0057
open for now.
Two related but distinct issues are triggered by the following test
cases with the Makefile generator:
1) The following causes the given custom command to be emitted for both
the foo and bar target which can lead to parallel build errors:
cmake_minimum_required(VERSION 3.2)
file(WRITE test.in)
file(WRITE dummy.cpp "int main() {}")
add_custom_command(
OUTPUT test.out
COMMAND ${CMAKE_COMMAND} -E echo Hello World
MAIN_DEPENDENCY test.in
)
add_executable(foo dummy.cpp test.in)
add_executable(bar dummy.cpp test.in)
2) The following causes the compile step for the dummy.cpp source file
to fail in presence of the custom command:
cmake_minimum_required(VERSION 3.2)
file(WRITE dummy.cpp "int main() {}")
add_custom_command(
OUTPUT test.out
COMMAND ${CMAKE_COMMAND} -E echo Hello World
MAIN_DEPENDENCY dummy.cpp
)
add_executable(foo dummy.cpp)
Nils
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