[petsc-users] Placing FindPETSc.cmake

Evan Um evanum at gmail.com
Fri May 11 17:04:47 CDT 2018 

Matt and Jed,

Thanks for your comments.

I still have a trouble in using FindPETSc.cmake. I removed the directory:
(i.e. canceling cp - r /home/evan/petsc//lib/petsc/
conf/rules /home/evan/petsc//lib/petsc/conf/petscrules) and explicitly set
SET (PETSC_ARCH "arch-linux2-c-debug all").
Now, FindPETSc.cmake does not recognize PETSC_DIR and PETSC_ARCH. When I
read the comments inside FindPETSc.cmake, the twos should be refined by
FindPETSc.cmake. BTW, I have my petsc at /home/evan/petsc. So all are
defaults.

Thanks for your kind help.

Evan

--------------
cmake_minimum_required(VERSION 3.10)

project(hellopetsc)
list (APPEND CMAKE_MODULE_PATH /home/evan/CLionProjects/hellopetsc)

SET(CMAKE_CXX_STANDARD 11)
SET(CMAKE_C_COMPILER mpicc)
SET(CMAKE_CXX_COMPILER mpicxx)

SET (PETSC_ARCH "arch-linux2-c-debug all")

find_package(PETSc COMPONENTS CXX)

add_executable(hellopetsc main.cpp)
--------------
/home/evan/opt/clion-2018.1.2/bin/cmake/bin/cmake -DCMAKE_BUILD_TYPE=Debug
-G "CodeBlocks - Unix Makefiles" /home/evan/CLionProjects/hellopetsc
CMake Error at FindPETSc.cmake:140 (message):
  The pair PETSC_DIR=/home/evan/petsc PETSC_ARCH=arch-linux2-c-debug all do
  not specify a valid PETSc installation
Call Stack (most recent call first):
  CMakeLists.txt:12 (find_package)


-- PETSc could not be found.  Be sure to set PETSC_DIR and PETSC_ARCH.
(missing: PETSC_INCLUDES PETSC_LIBRARIES PETSC_EXECUTABLE_RUNS) (found
version "3.9.1")
-- Configuring incomplete, errors occurred!
See also
"/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMakeFiles/CMakeOutput.log".
See also
"/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMakeFiles/CMakeError.log".

[Finished]
--------------


On Fri, May 11, 2018 at 2:13 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Fri, May 11, 2018 at 5:06 PM, Evan Um <evanum at gmail.com> wrote:
>
>> Hi Jed,
>>
>> Thanks for the comment. I added the module but still saw errors (before I
>> arrived here, I had to do cp - r /home/evan/petsc//lib/petsc/
>> conf/rules /home/evan/petsc//lib/petsc/conf/petscrules).
>>
>
> That is wrong. It means PETSC_ARCH is (null) instead of the correct string.
>
>    Matt
>
>
>> They are supposed to be defined by FindPETSc.cmake. How could I solve
>> these errors?
>>
>> Could you also explain a little bit about how to use pkg-config to find
>> PETSc? Thanks!
>>
>> Evan
>>
>> ----------------
>> cmake_minimum_required(VERSION 3.10)
>>
>> project(hellopetsc)
>> list (APPEND CMAKE_MODULE_PATH /home/evan/CLionProjects/hellopetsc)
>>
>> SET(CMAKE_CXX_STANDARD 11)
>> SET(CMAKE_C_COMPILER mpicc)
>> SET(CMAKE_CXX_COMPILER mpicxx)
>>
>> find_package(PETSc COMPONENTS CXX)
>>
>> add_executable(hellopetsc main.cpp)
>> -----------------
>>
>> -----------------
>> /home/evan/opt/clion-2018.1.2/bin/cmake/bin/cmake
>> -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - Unix Makefiles"
>> /home/evan/CLionProjects/hellopetsc
>> -- PETSc could not be found.  Be sure to set PETSC_DIR and PETSC_ARCH.
>> (missing: PETSC_INCLUDES PETSC_LIBRARIES PETSC_EXECUTABLE_RUNS) (found
>> version "3.9.1")
>> -- Configuring done
>> -- Generating done
>> -- Build files have been written to: /home/evan/CLionProjects/hello
>> petsc/cmake-build-debug
>>
>> [Finished]
>> -----------------
>>
>>
>> On Fri, May 11, 2018 at 12:08 PM, Jed Brown <jed at jedbrown.org> wrote:
>>
>>> Yes, it depends on this module from the same repository.
>>>
>>> Note that you can use pkg-config to find PETSc these days.
>>>
>>> Evan Um <evanum at gmail.com> writes:
>>>
>>> > Hi Stefano,
>>> >
>>> > Thanks for your comment. Now, cmake was able to locate FindPETSc.cmake
>>> file
>>> > in my project directory, but I see a new error.
>>> >
>>> > Evan
>>> >
>>> >
>>> > Messages
>>> > ----------------------------------------------
>>> > /home/evan/opt/clion-2018.1.2/bin/cmake/bin/cmake
>>> -DCMAKE_BUILD_TYPE=Debug
>>> > -G "CodeBlocks - Unix Makefiles" /home/evan/CLionProjects/hellopetsc
>>> > CMake Error at FindPETSc.cmake:123 (include):
>>> >   include could not find load file:
>>> >
>>> >     FindPackageMultipass
>>> > Call Stack (most recent call first):
>>> >   CMakeLists.txt:10 (find_package)
>>> >
>>> >
>>> > CMake Error at FindPETSc.cmake:124 (find_package_multipass):
>>> >   Unknown CMake command "find_package_multipass".
>>> > Call Stack (most recent call first):
>>> >   CMakeLists.txt:10 (find_package)
>>> >
>>> >
>>> > -- Configuring incomplete, errors occurred!
>>> > See also
>>> > "/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMake
>>> Files/CMakeOutput.log".
>>> > See also
>>> > "/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMake
>>> Files/CMakeError.log".
>>> > ----------------------------------------------
>>> >
>>> > CMakeLists.txt
>>> > ----------------------------------------------
>>> > /home/evan/opt/clion-2018.1.2/bin/cmake/bin/cmake
>>> -DCMAKE_BUILD_TYPE=Debug
>>> > -G "CodeBlocks - Unix Makefiles" /home/evan/CLionProjects/hellopetsc
>>> > CMake Error at FindPETSc.cmake:123 (include):
>>> >   include could not find load file:
>>> >
>>> >     FindPackageMultipass
>>> > Call Stack (most recent call first):
>>> >   CMakeLists.txt:10 (find_package)
>>> >
>>> >
>>> > CMake Error at FindPETSc.cmake:124 (find_package_multipass):
>>> >   Unknown CMake command "find_package_multipass".
>>> > Call Stack (most recent call first):
>>> >   CMakeLists.txt:10 (find_package)
>>> >
>>> >
>>> > -- Configuring incomplete, errors occurred!
>>> > See also
>>> > "/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMake
>>> Files/CMakeOutput.log".
>>> > See also
>>> > "/home/evan/CLionProjects/hellopetsc/cmake-build-debug/CMake
>>> Files/CMakeError.log".
>>> >
>>> > [Finished]
>>> >
>>> >
>>> >
>>> > On Fri, May 11, 2018 at 11:34 AM, Stefano Zampini <
>>> stefano.zampini at gmail.com
>>> >> wrote:
>>> >
>>> >> CMAKE is case sensitive on this. You should use find_package(PETSc ….)
>>> >>
>>> >>
>>> >> > On May 11, 2018, at 9:28 PM, Evan Um <evanum at gmail.com> wrote:
>>> >> >
>>> >> > Hi,
>>> >> >
>>> >> > I would like to ask a question about FindPETSc.cmake. I place the
>>> cmake
>>> >> file in the same directory where main.cpp is placed. I also placed
>>> the file
>>> >> in /usr/share/cmake_xx/Modules.
>>> >>
>>> >> Actually, it can be put in any directory pointed by the variable
>>> >> CMAKE_MODULE_PATH. If I were you, I would not modify /usr/share/
>>> >>
>>> >> > Where should i put the file? What else should I do to use the file
>>> in
>>> >> cmake? Do I need any other lines in my cmakelists.txt except
>>> >> find_package(petsc)? Thanks for your comments.
>>> >> >
>>> >> > Evan
>>> >> >
>>> >> > -------------------------------------------------------------
>>> >> >
>>> >> > cmake_minimum_required(VERSION 3.10)
>>> >> >
>>> >> > project(hellopetsc)
>>> >> >
>>> >> > SET(CMAKE_CXX_STANDARD 11)
>>> >> > SET(CMAKE_C_COMPILER mpicc)
>>> >> > SET(CMAKE_CXX_COMPILER mpicxx)
>>> >> >
>>> >> > find_package(PETSC COMPONENTS CXX)
>>> >> >
>>> >> > add_executable(hellopetsc main.cpp)
>>> >> >
>>> >> > ------------------------------------------------------------
>>> >> > CMake Warning at CMakeLists.txt:9 (find_package):
>>> >> >   By not providing "FindPETSC.cmake" in CMAKE_MODULE_PATH this
>>> project
>>> >> has
>>> >> >   asked CMake to find a package configuration file provided by
>>> "PETSC",
>>> >> but
>>> >> >   CMake did not find one.
>>> >> >
>>> >> >   Could not find a package configuration file provided by "PETSC"
>>> with
>>> >> any of
>>> >> >   the following names:
>>> >> >
>>> >> >     PETSCConfig.cmake
>>> >> >     petsc-config.cmake
>>> >> >
>>> >> >   Add the installation prefix of "PETSC" to CMAKE_PREFIX_PATH or set
>>> >> >   "PETSC_DIR" to a directory containing one of the above files.  If
>>> >> "PETSC"
>>> >> >   provides a separate development package or SDK, be sure it has
>>> been
>>> >> >   installed.
>>> >>
>>> >>
>>>
>>
>>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
> https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
>
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