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disable cmake compiler check language=None #4276

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merged 3 commits into from Jan 16, 2019
Merged

disable cmake compiler check language=None #4276

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3f9db69
disable cmake compiler check language=None
memsharded Jan 10, 2019
afdf8df
added test
memsharded Jan 11, 2019
b0b3d1c
fixed broken test
memsharded Jan 11, 2019
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8 changes: 4 additions & 4 deletions conans/client/generators/cmake_common.py
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Expand Up @@ -397,6 +397,10 @@ def generate_targets_section(dependencies):
endfunction()

function(conan_check_compiler)
if(CONAN_DISABLE_CHECK_COMPILER)
conan_message(STATUS "WARN: Disabled conan compiler checks")
return()
endif()
if(NOT DEFINED CMAKE_CXX_COMPILER_ID)
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@SSE4 SSE4 Jan 13, 2019 •
edited

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I suppose we also have to check ENABLED_LANGUAGES property (obviously, after the CONAN_DISABLE_CHECK_COMPILER check)

(to obtain a list use get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES))

and execute checks only if it has C or CXX in the list (potentially, also Objective-C and Objective-C++?),

otherwise skip (no language at all / Fortran / D / Rust / Go / C# / Whatever else)

see also:
https://cmake.org/cmake/help/v3.3/command/project.htm
https://cmake.org/cmake/help/v3.3/prop_gbl/ENABLED_LANGUAGES.html

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I guess that if someone is using conan for those languages, they are already setting CONAN_DISABLE_CHECK_COMPILER. And if for some other reason the language is not set, maybe it is better to raise an error early.

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yeah, raising an error might be a good strategy in this case.

if(DEFINED CMAKE_C_COMPILER_ID)
conan_message(STATUS "This project seems to be plain C, using '${CMAKE_C_COMPILER_ID}' compiler")
Expand All @@ -406,10 +410,6 @@ def generate_targets_section(dependencies):
message(FATAL_ERROR "This project seems to be plain C, but no compiler defined")
endif()
endif()
if(CONAN_DISABLE_CHECK_COMPILER)
conan_message(STATUS "WARN: Disabled conan compiler checks")
return()
endif()
if(NOT CMAKE_CXX_COMPILER_ID AND NOT CMAKE_C_COMPILER_ID)
# This use case happens when compiler is not identified by CMake, but the compilers are there and work
conan_message(STATUS "*** WARN: CMake was not able to identify a C or C++ compiler ***")
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26 changes: 26 additions & 0 deletions conans/test/functional/generators/cmake_test.py
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Expand Up @@ -9,6 +9,32 @@

class CMakeGeneratorTest(unittest.TestCase):

def test_no_check_compiler(self):
# https://github.com/conan-io/conan/issues/4268
file_content = '''from conans import ConanFile, CMake

class ConanFileToolsTest(ConanFile):
generators = "cmake"

def build(self):
cmake = CMake(self)
cmake.configure()
'''

cmakelists = '''cmake_minimum_required(VERSION 2.8)
PROJECT(conanzlib LANGUAGES NONE)
set(CONAN_DISABLE_CHECK_COMPILER TRUE)

include(conanbuildinfo.cmake)
CONAN_BASIC_SETUP()
'''
client = TestClient()
client.save({"conanfile.py": file_content,
"CMakeLists.txt": cmakelists})

client.run('install .')
client.run('build .')

@attr('slow')
def no_output_test(self):
client = TestClient()
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8 changes: 1 addition & 7 deletions conans/test/functional/old/libcxx_setting_test.py
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Expand Up @@ -39,15 +39,9 @@ def package(self):
'''


def nowintest(func):
if platform.system() == "Windows":
func.__test__ = False
return func


class LibcxxSettingTest(unittest.TestCase):

@nowintest
@unittest.skipIf(platform.system() == "Windows", "Not in Windows")
def test_declared_stdlib_and_passed(self):
client = TestClient()
client.save({"conanfile.py": file_content,
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