And it you don't skip Fortran modules?
> On Jan 3, 2020, at 4:36 PM, j...@jedbrown.org wrote:
>
> A few seconds if you skip Fortran modules.
>
> I didn't realize there were any active developers not using ccache. We should
> add a note to the manual.
>
> On Jan 3, 2020 15:04, "Smith, Barry F." <bsm...@mcs.anl.gov> wrote:
>
>
> > On Jan 3, 2020, at 3:07 PM, Matthew Knepley <knep...@gmail.com> wrote:
> >
> > On Fri, Jan 3, 2020 at 3:52 PM Smith, Barry F. <bsm...@mcs.anl.gov> wrote:
> >
> > A long time ago Oana suggested a tool that allowed switching between
> > PETSc configurations after pulls etc that didn't require waiting to
> > recompile code or rerun configure. Based on her ideas I finally got
> > something that has been behaving reasonably satisfactory for me. Note that
> > it is only useful if you work with PETSc in a way that you have multiple
> > branches and PETSc arches you are dealing with. If you are essentially
> > always in one branch it offers no advantages. (Unfortunately since Fortran
> > stubs are stored in the source for branch changes that
> > change the stubs the will require recompiles). This is my first public
> > release so may have glitches. It saves me tons of time.
> >
> > Barry, I had the same problem, but it went away when I started using ccache
> > in front of the compiler for every arch. Does
> > this not work for you?
>
> I don't know, never tried it. Still it must "compile" the code (that is
> generate all the .o) and rebuild the libraries which takes some time?
>
> Barry
>
> >
> > Thanks,
> >
> > Matt
> >
> > Put this in your .bashrc file and run source ~/.bashrc Docs are at the
> > bottom.
> >
> > #
> > # Utility function used by gitcheckout bash function
> > # uses the basename of the branch to build the PETSC_ARCH
> > #
> > function branchtoarch () {
> > basename `echo $1 | sed s?/maint?-maint?g` | sed -e s?/?-?g -e
> > s?^?arch-?g
> > }
> >
> > #
> > # Used by the git alias provided below; not used directly
> > #
> > # Implements a git checkout, but preserves any previously compiled (.o)
> > code so it won't unneccessariy get recompiled
> > #
> > # Sets PETSC_ARCH automatically based on the branch name
> > #
> > # How it works:
> > # 1) before changing from the current PETSC_ARCH branch combination it
> > deletes all out-dated .o files for that PETSC_ARCH (using make --dry-run to
> > find these)
> > # 2) after checking into the new PETSC_ARCH branch combination it
> > updates the time-stamps of all remaing .o files for the new PETSC_ARCH so
> > they are
> > # more recent than any timestamps on the source files that git may
> > have changed (it can do this because it knows from 1) that any out-of-date
> > # .o files have already been deleted)
> > #
> > # Does not change the timestamps or touch in any way the source code,
> > only .o files
> > #
> > function gitcheckout {
> > new_branch=$1
> > current_branch=`command git rev-parse --abbrev-ref HEAD`
> >
> > if [ -f ${new_branch} ]; then
> > command git checkout ${new_branch}
> > return 0
> > fi
> >
> > if [ "${new_branch}" == "-b" ]; then
> > command git rev-parse --verify $2 > /dev/null 2>&1
> > if [ "$?" == "0" ]; then
> > echo "Branch you are trying to create $2 already exists, aborting"
> > return 9
> > else
> > # create the new branch, do not yet check it out
> > new_branch=$2
> > command git branch ${new_branch}
> > fi
> > else
> > if [ "${current_branch}" == "${new_branch}" ]; then
> > echo "Already in branch ${new_branch}"
> > return 0
> > fi
> > changes=`command git status --untracked-files=no --porcelain`
> > if [ "${changes}" != "" ]; then
> > echo "You have modified or new files; not changing branches"
> > echo ${changes}
> > return 5
> > fi
> > fi
> >
> > current_arch=`branchtoarch ${current_branch}`
> > new_arch=`branchtoarch ${new_branch}`
> >
> > isbranch=0
> > command git rev-parse --verify ${new_branch} > /dev/null 2>&1
> > if [ "$?" == "0" ]; then
> > isbranch=1
> > else
> > command git rev-parse --verify origin/${new_branch} > /dev/null 2>&1
> > if [ "$?" == "0" ]; then
> > isbranch=1
> > fi
> > fi
> > if [ "${isbranch}" == "0" ]; then
> > echo "Branch ${new_branch} does not exist"
> > return 3
> > fi
> >
> > echo "Checking out branch ${new_branch} and PETSC_ARCH ${new_arch}"
> >
> > if [ "${PETSC_ARCH}" != "${current_arch}" ]; then
> > echo "Current PETSC_ARCH ${PETSC_ARCH} not equal to expected value
> > ${current_arch} unable to removed out-dated object files"
> > else
> > # delete all out-dated .o files
> > if [[ -f ${PETSC_DIR}/${PETSC_ARCH}/lib/petsc/conf/petscvariables &&
> > -d ${PETSC_DIR}/${PETSC_ARCH}/obj ]]; then
> > pushd ${PETSC_DIR}
> > make --dry-run -f gmakefile | sed -n
> > 's?[[:print:][:cntrl:]]*-o[[:blank:]]\([-[:alpha:]/]*\.o\)[[:print:][:cntrl:]]*?\1?gp'
> > | xargs rm -f
> > popd
> > fi
> > fi
> >
> > command git checkout ${new_branch}
> > if [ "$?" != "0" ]; then
> > echo "Unable to checkout branch ${new_branch}"
> > return 4
> > fi
> >
> > export PETSC_ARCH=${new_arch}
> > # update the timestamps of all .o that remain for this PETSC_ARCH and
> > the library
> > if [[ -f ${PETSC_DIR}/${PETSC_ARCH}/lib/petsc/conf/petscvariables && -d
> > ${PETSC_DIR}/${PETSC_ARCH}/obj ]]; then
> > find ${PETSC_DIR}/${PETSC_ARCH}/obj -type f -name *.o -exec touch -m
> > {} +
> > touch -m ${PETSC_DIR}/${PETSC_ARCH}/lib/libpetsc*
> > # /usr/bin/dsymutil libpetsc.3.011.3.dylib
> > fi
> > }
> >
> > #
> > # An alias for git checkout that manages resetting the PETSC_ARCH to the
> > branch name and preserving compiled code associated with the branch checked
> > out
> > #
> > # Oana suggested the idea to save waiting for code to recompile after
> > changing branches and the use of touch to force code to not get recompiled
> > unnecessarily
> > #
> > # Usage:
> > # git checkout branchname
> > #
> > # Examples:
> > # $ git checkout next
> > # Checking out branch next and PETSC_ARCH arch-none
> > # Switched to branch 'next'
> > # ~/Src/petsc (next<) arch-next
> > #
> > # $ git checkout master
> > # Checking out branch master and PETSC_ARCH arch-master
> > # Switched to branch 'master'
> > # ~/Src/petsc (master=) arch-master
> > #
> > # $ git checkout -b barry/mynewbranch
> > # Switched to branch 'barry/mynewbranch'
> > # ~/Src/petsc (barry/mynewbranch=) arch-mynewbranch
> > #
> > # Uses the bash function gitcheckout
> > #
> > function git {
> > groot=`command git rev-parse --absolute-git-dir 2> /dev/null`
> > if [[ "$1" == "checkout" && "$@" != *"--help"* && "${PETSC_DIR}" != "" &&
> > "${PETSC_DIR}/.git" == "${groot}" ]]; then
> > shift 1
> > if [ "$1" == "git" ]; then
> > shift 2
> > fi
> > gitcheckout "$@"
> > else
> > command git "$@"
> > fi
> > }
> >
> >
> >
> >
> > --
> > 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/
>
>
>
