install older version of cmake on cygwin

dc217863 · 03-21-2016, 01:12 PM

Hello,

I have cygwin installed on my computer. For the project I am working on, I need to use the CMake 2.8.10.2 version. I am able to download the files for this version from 'http://www.npackd.org/p/org.cmake.CMake/2.8.10.2'. However, I need help to install this version now onto the existing cygwin on my computer.

Note: At present CMake 3.3.2 is installed on the computer (by inputting cmake --version) into cygwin. This version was installed while installing cygwin on the computer.

Please do provide step-by-step instructions as I am a newbie in Cygwin/CMake.

Thanks,
Dhruv

kristianonline · 03-21-2016, 02:29 PM

Why do you think you need CMake 2.8.10.2 ?

As far as I know, CMake is backwards compatible, so if you have CMake 3.3.2, it is sufficient. You do not have to change anything.

dc217863 · 03-21-2016, 02:45 PM

With one look at the errors I was receiving, a colleague was able to suggest that it has to be the wrong version of CMake causing the errors.

kristianonline · 03-21-2016, 02:47 PM

Can you post the errors ? Maybe the problem is another than the version of CMake or we can fix that error in an easier way?

dc217863 · 03-21-2016, 03:36 PM

ok.. let me give it a go

This is the toolchain file used for cross compiling:

Code:

# for cross compiling
SET(CMAKE_SYSTEM_NAME Generic)
# $RANDOM
SET(CMAKE_SYSTEM_VERSION 1)

# ARM compiler
SET(CMAKE_C_COMPILER C:/ARM/bin64/armcc.exe)

# ARM cpp compiler
SET(CMAKE_CXX_COMPILER C:/ARM/bin64/armcc.exe)

SET(CMAKE_AR C:/ARM/bin64/armar.exe)
#SET(CMAKE_C_LINK_EXECUTABLE C:/ARM/bin64/armlink.exe)

# location of the target environment
SET(CMAKE_FIND_ROOT_PATH $ENV{ARMROOT})

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

# target specification
SET(ARCH "-DARM -DSA2_TARGET --cpu=Cortex-A9")
SET(CMAKE_C_FLAGS_INIT "${ARCH}")
SET(CMAKE_CXX_FLAGS_INIT "${CMAKE_C_FLAGS_INIT} --cpp")

Inspite of the presence of the armcc.exe file in the directory being provided to PATH (and being provided to CMAKE_C_COMPILER), cmake always returns the error that "The C compiler identification is unknown" and that it is unable to compile a simple test program.

However, on trying to compile a sample Hello World c file, it compiles without a glitch.

The CMake command I use:

Code:

cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=../Config/Buildsystem/arm-5_102.toolchain -DCMAKE_BUILD_TYPE=Debug ../../../Sources

The path names and locations are all correct and their existence has been verified. The environment variables have also been correctly specified.

Any ideas??

pan64 · 03-21-2016, 03:51 PM

would be nice to show exactly the commands you executed and the error message(s) you got. I'm not really sure it is really related to the version of cmake.
Using an older version of cmake will force you to downgrade a lot of other packages I think, so anyway that will not be easy.

kristianonline · 03-21-2016, 05:09 PM

Did you start cmake as an Admin?

dc217863 · 03-22-2016, 01:16 AM

@kristianonline: I am starting cygwin as an administrator. Would CMake then also be called in Admin mode? Do I need to check if some particular folder is write protected?

Code:

export PATH=/cygdrive/c/ARM/bin64/:$PATH
export PATH=/cygdrive/c/Python27/:$PATH

“build lib”
cd /cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target
cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=../Config/Buildsystem/arm-5_102.toolchain -DCMAKE_BUILD_TYPE=Debug ../../../Sources

I am supposed to "make" as the next step. But I get errors before that.

The error messages/output:

Quote:

-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
-- Check for working C compiler: /cygdrive/c/ARM/bin64/armcc.exe
-- Check for working C compiler: /cygdrive/c/ARM/bin64/armcc.exe -- broken
CMake Error at /usr/share/cmake-3.3.2/Modules/CMakeTestCCompiler.cmake:61 (message):
The C compiler "/cygdrive/c/ARM/bin64/armcc.exe" is not able to compile a
simple test program.

It fails with the following output:

Change Dir: /cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeTmp

Run Build Command:"/cygdrive/c/ARM/bin64/make.exe" "cmTC_11a77/fast"

C:/ARM/bin64/make -f CMakeFiles/cmTC_11a77.dir/build.make
CMakeFiles/cmTC_11a77.dir/build

make[1]: Entering directory
`C:/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeTmp'

Building C object CMakeFiles/cmTC_11a77.dir/testCCompiler.c.obj

/cygdrive/c/ARM/bin64/armcc.exe -DARM -DSA2_TARGET --cpu=Cortex-A9 -o
CMakeFiles/cmTC_11a77.dir/testCCompiler.c.obj -c
/cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeTmp/testCCompiler.c

make[1]: Leaving directory
`C:/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeTmp'

process_begin: CreateProcess(NULL, /cygdrive/c/ARM/bin64/armcc.exe -DARM
-DSA2_TARGET --cpu=Cortex-A9 -o
CMakeFiles/cmTC_11a77.dir/testCCompiler.c.obj -c
/cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeTmp/testCCompiler.c,
...) failed.

make (e=2): Das System kann die angegebene Datei nicht finden.

make[1]: *** [CMakeFiles/cmTC_11a77.dir/testCCompiler.c.obj] Error 2

make: *** [cmTC_11a77/fast] Error 2

CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:5 (PROJECT)

-- Configuring incomplete, errors occurred!
See also "/cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeOutput.log".
See also "/cygdrive/c/_sa2/Proj/swbk/Config/Buildsystem/target/CMakeFiles/CMakeError.log".

pan64 · 03-22-2016, 01:22 AM

yes, armcc.exe is not a c compiler but a cross-compiler, it won't be able to create native executable inside cygwin.

Please check these links how to set up cmake for cross compiling:
https://cmake.org/Wiki/CMake_Cross_Compiling
http://stackoverflow.com/questions/1...arm-with-cmake

dc217863 · 03-22-2016, 01:48 AM

Yes, I understand that I will get object files from cmake which I then need to Make to get the final result.

I have made the toolchain file (provided in above comments for reference) according to the first link you provided.

pan64 · 03-22-2016, 01:52 AM

Quote:

Originally Posted by dc217863

Yes, I understand that I will get object files from cmake which I then need to Make to get the final result.

I do not really understand it. CMake will create makefiles for you and make will produce object files and binaries (and the final result).

Quote:

Originally Posted by dc217863

I have made the toolchain file (provided in above comments for reference) according to the first link you provided.

Does it work now?

dc217863 · 03-22-2016, 01:58 AM

Quote:

Originally Posted by pan64

I do not really understand it. CMake will create makefiles for you and make will produce object files and binaries (and the final result).

Ok. My mistake. You are right.

Quote:

Originally Posted by pan64

Does it work now?

No. I have not changed anything as yet. I did not understand what is wrong. Could you please have a look at the toolchain file (in above comments) and point me to what is wrong?

OregonJim · 03-22-2016, 02:43 AM

Quote:

Originally Posted by dc217863

# ARM compiler
SET(CMAKE_C_COMPILER C:/ARM/bin64/armcc.exe)

# ARM cpp compiler
SET(CMAKE_CXX_COMPILER C:/ARM/bin64/armcc.exe)

SET(CMAKE_AR C:/ARM/bin64/armar.exe)
#SET(CMAKE_C_LINK_EXECUTABLE C:/ARM/bin64/armlink.exe)

The above lines are incorrect. The Cygwin environment doesn't understand drive designators like "C:". You have to translate them to the Cygwin path equivalent. For example, "C:/ARM/bin64/amcc.exe" becomes "/cygdrive/c/ARM/bin64/armcc.exe".