[CMake] Question about IF and STRINGS

[Steven Truppe]

Found the problem, my regex was wrong [AZaz] should be [A-Za-z] ...

On 31.05.19 19:07, Steven Truppe wrote:
>
> The problem is the line:
>
> if(${_var} MATCHES "^WITH_LIB_([AZaz]+)$")
> cmake_print_variables(CMAKE_MATCH_0)
>
> doesn't print me any output ...
>
>
> On 31.05.19 18:53, Steven Truppe wrote:
>>
>> Hi everyone,
>>
>> i try to create a build system where you can decide which libraries
>> you want to use with variables like "WITH_LIB_GLFW" for example.
>> every lib variable has other variables like WITH_LIB_GLFW_INC_PATH,
>>
>> WITH_LIB_GLFW_LIB_PATH, etc. so i can decide with cmake what
>> libraries i'm going to use for the final executable.
>>
>> Now my problem is that i'm relative new to cmake and i'm learning
>> c++11 in the meantime and are coding on a project so i don't have to
>> much time for cmake (but it's a realy important part).
>>
>> Here is the code:
>>
>> cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
>> include(CMakePrintHelpers)
>>
>> set(WITH_LIB_GLAD "Support the GLAD library" 1)
>> set(WITH_LIB_GLFW "Support for the GLFW library" 1)
>>
>>   macro(bsAddLibrary lib)
>> 	# get all WITH_LIB varables
>>
>> 	get_cmake_property(_variables VARIABLES)
>> 	foreach(_var ${_variables})
>> 		#	cmake_print_variables(${_var})
>> 		if(${_var} MATCHES "^WITH_LIB_[AZaz]+$" _lib)
>> 			cmake_print_variables(${_lib})
>> 		endif()
>> 	endforeach()
>> endmacro()
>>
>>
>> bsAddLibrary(WITH_LIB_GLAD) # Adds WITH_LIB_GLAD_INC_PATH and the other variables to a list for the main application that holds all inc path, compiler flags etc.
>>
>>   ERROR:
>> ======
>>
>> -- The C compiler identification is GNU 6.3.0
>> -- The CXX compiler identification is GNU 6.3.0
>> -- Check for working C compiler: /usr/bin/cc
>> -- Check for working C compiler: /usr/bin/cc -- works
>> -- Detecting C compiler ABI info
>> -- Detecting C compiler ABI info - done
>> -- Detecting C compile features
>> -- Detecting C compile features - done
>> -- Check for working CXX compiler: /usr/bin/c++
>> -- Check for working CXX compiler: /usr/bin/c++ -- works
>> -- Detecting CXX compiler ABI info
>> -- Detecting CXX compiler ABI info - done
>> -- Detecting CXX compile features
>> -- Detecting CXX compile features - done
>> CMake Error at CMakeLists.txt:15 (if):
>>    if given arguments:
>>
>>      "CMAKE_AR" "MATCHES" "^WITH_LIB_[AZaz]+\$" "_lib"
>>
>>    Unknown arguments specified
>> Call Stack (most recent call first):
>>    CMakeLists.txt:22 (bsAddLibrary)
>>
>
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