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Adjusting CMake compiler commands to account for weirdness


By : Andrée Bélec
Date : July 30 2020, 07:00 PM
it fixes the issue In CMake a compiler's command line is specified in CMAKE__COMPILE_OBJECT variable.
You may set this variable in a separate file:
code :
set(CMAKE_CXX_COMPILE_OBJECT "<CMAKE_CXX_COMPILER> -ccdsp <FLAGS> -o <OBJECT>")
 # Assume file 'my_clang_override.cmake' to be in the project's source directory.
 set(CMAKE_USER_MAKE_RULES_OVERRIDE "my_clang_override.cmake")
cmake -DCMAKE_USER_MAKE_RULES_OVERRIDE=<path/to/my_clang_override.cmake> <other-parameters>


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Tell CMake to use C++ compiler for C files coming from CMake?


By : yacho ignazeo
Date : March 29 2020, 07:55 AM
I wish this help you There are ways to add .c as a valid file extension for the CXX compiler. Even this being very advanced CMake stuff, you may need - if you are bound to support older versions of CMake - a "make rules overwrite script" anyway.
So I've successfully tested the following:
code :
list(APPEND CMAKE_CXX_SOURCE_FILE_EXTENSIONS c)
cmake_minimum_required(VERSION 2.8.7 FATAL_ERROR)

set(CMAKE_USER_MAKE_RULES_OVERRIDE "CryptoppMakeRulesOverwrite.cmake")

project(cryptopp CXX)

include(CheckTypeSize)
CHECK_TYPE_SIZE("unsigned short" CMAKE_SIZEOF_UNSIGNED_SHORT)

CMake: The C compiler is not able to compile a simple test program. Surprisingly C compiler identification is unknown bu


By : Daniel L.
Date : March 29 2020, 07:55 AM
it fixes the issue Fixed now by upgrading my GCC from 4.9.2 to 4.9.3. No more problems with crashing, however apparently there was a change related to C++11 standard and I need to manually edit CMakeLists.txt to change flag -std=c++11 to -std=gnu++11 when compiling any library and any program
MinGW / CxxTest bizarre errors

CMake - how to call installation commands from the top level AFTER these commands from subdirectories?


By : Jason
Date : March 29 2020, 07:55 AM
With these it helps Just move install(CODE) into subdirectory (but add this subdirectory at the end ot the script, after others add_subdirectory calls).
I know no other ways to force CMake to execute your installation code after all others.

cmake: how to add a compiler flag according to current compiler version


By : gleydson.araujo
Date : March 29 2020, 07:55 AM
Hope that helps I have a c library to maintain, which is built by cmake. When I start to build it, it tells me that , Quoting from man gcc
code :
include(CheckCCompilerFlag)
check_c_compiler_flag(-Winvalid-offsetof HAS_INVALID_OFFSETOF)
if (HAS_INVALID_OFFSETOF)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-invalid-offsetof")
endif()

GCC array of struct compiler weirdness


By : Jeffrey S
Date : March 29 2020, 07:55 AM
around this issue First, you should do it inside a function body. Then, the syntax of using the braces is illegal, because you assign them to a pointer, not to an array or struct. That syntax is also only valid when initializing, not during assignment.
The code is probably using compound literals, and some programmer removed the necessary type name:
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