Can't set PCRE2_BUILD_TESTS and PCRE2_BUILD_PCRE2GREP in CMake when added as dependency

[mcfriend99]

I'm using the following CMake section to build pcre2 as a project dependency on Ubuntu 20.04 and MacoOS monterey.

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(PCRE2_USE_STATIC_LIBS ON)
set(PCRE2_BUILD_TESTS OFF)
set(PCRE2_BUILD_PCRE2GREP OFF)
include(FetchContent)
FetchContent_Declare(pcre2
		URL      https://github.com/PCRE2Project/pcre2/releases/download/pcre2-10.42/pcre2-10.42.tar.gz
		URL_HASH SHA256=c33b418e3b936ee3153de2c61cc638e7e4fe3156022a5c77d0711bcbb9d64f1f
		)
FetchContent_MakeAvailable(pcre2)

if(NOT pcre2_POPULATED)
	FetchContent_Populate(pcre2)
	add_subdirectory(${pcre2_SOURCE_DIR} ${pcre2_BUILD_DIR})
endif()

However, PCRE2_BUILD_TESTS and PCRE2_BUILD_PCRE2GREP are still showing and behaving as ON in cmake configuration and build

I've also tried with ubuntu-latest and macos-latest on Github and I'm still getting the following errors on ctest.

The following tests FAILED:
[173](https://github.com/user/repo/actions/runs/xxx/jobs/yyy#step:5:174)
	 69 - pcre2_test (Failed)
[174](https://github.com//user/repo/actions/runs/xxx/jobs/yyy#step:5:175)
	 70 - pcre2_grep_test (Failed)
[175](https://github.com/blade-lang//user/repo/runs/xxx/jobs/yyy#step:5:176)
	 71 - pcre2posix_test (Not Run)

Same error locally. What could I be doing wrong??

[mcfriend99]

I've even tried disabling install using

macro(install)
    _install(${ARGN})
endmacro()

Still the same thing.

[mcfriend99]

Looks like #266 is trying to address this problem. Any luck on getting this merged??

[PhilipHazel]

As you probably noticed, there is a flurry of activity surrounding CMake at the moment, especially #260. I know nothing about CMake, so I was holding off merging anything until it all settles down. @carenas, should I get on with merging #266 as is requested here?

[carenas]

#265 and #266 are independent of #260 and can be applied now, there is sadly no warranty it will actually solve this use case though, but can't hurt

[mcfriend99]

For others that may end up here in the future, adding set(CMAKE_POLICY_DEFAULT_CMP0077 NEW) before other declarations fixed it for me. Like this:

set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(PCRE2_USE_STATIC_LIBS ON)
set(PCRE2_BUILD_TESTS OFF)
set(PCRE2_BUILD_PCRE2GREP OFF)
include(FetchContent)
FetchContent_Declare(pcre2
		URL      https://github.com/PCRE2Project/pcre2/releases/download/pcre2-10.42/pcre2-10.42.tar.gz
		URL_HASH SHA256=c33b418e3b936ee3153de2c61cc638e7e4fe3156022a5c77d0711bcbb9d64f1f
		)
FetchContent_MakeAvailable(pcre2)

if(NOT pcre2_POPULATED)
	FetchContent_Populate(pcre2)
	add_subdirectory(${pcre2_SOURCE_DIR} ${pcre2_BUILD_DIR})
endif()

I'll be closing for now since there is a solution.