Hi Gábor,
On Thu, 20 Dec 2018, SZEDER Gábor wrote:
> Our 'Makefile' hardcodes the compiler to build Git as 'CC = cc'. This
... This CC variable ...
> can be overridden from the command line, i.e. 'make CC=gcc-X.Y' will
> build with that particular GCC version, but not from the environment,
> i.e. 'CC=gcc-X.Y make' will still build with whatever 'cc' happens to
> be on the platform.
Without this edit, it read to me as if the commit message claimed that
CC cannot be overridden via the environment *at all*, even with MAKEFLAGS.
The rest of the entire patch series looks good to me, I did not dig as
deeply as Ævar about that obstack patch, but if there is *some* sort of
upstream from where we can get a fix, I think we should try to go for that
(rather than risking to diverge even further).
Thanks,
Dscho
>
> Our build jobs on Travis CI are badly affected by this. In the build
> matrix we have dedicated build jobs to build Git with GCC and Clang
> both on Linux and macOS from the very beginning (522354d70f (Add
> Travis CI support, 2015-11-27)). Alas, this never really worked as
> supposed to, because Travis CI specifies the compiler for those build
> jobs as 'export CC=gcc' and 'export CC=clang' (which works fine for
> projects built with './configure && make'). Consequently, our
> 'linux-clang' build job has always used GCC, because that's where 'cc'
> points at in Travis CI's Linux images, while the 'osx-gcc' build job
> has always used Clang. Furthermore, 37fa4b3c78 (travis-ci: run gcc-8
> on linux-gcc jobs, 2018-05-19) added an 'export CC=gcc-8' in an
> attempt to build with a more modern compiler, but to no avail.
>
> Set MAKEFLAGS with CC based on the $CC environment variable, so 'make'
> will run the "right" compiler. The Xcode 10.1 macOS image on Travis
> CI already contains the gcc@8 package from Homebrew, but we have to
> 'brew link' it first to be able to use it.
>
> So with this patch our build jobs will build Git with the following
> compiler versions:
>
> linux-clang: clang version 5.0.0 (tags/RELEASE_500/final)
> linux-gcc: gcc-8 (Ubuntu 8.1.0-5ubuntu1~14.04) 8.1.0
>
> osx-clang: Apple LLVM version 10.0.0 (clang-1000.11.45.5)
> osx-gcc: gcc-8 (Homebrew GCC 8.2.0) 8.2.0
>
> GETTEXT_POISON: gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
>
> Signed-off-by: SZEDER Gábor <szeder.dev@xxxxxxxxx>
> ---
> ci/install-dependencies.sh | 5 +++++
> ci/lib-travisci.sh | 15 ++++++++++++---
> 2 files changed, 17 insertions(+), 3 deletions(-)
>
> diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
> index 06c3546e1e..dc719876bb 100755
> --- a/ci/install-dependencies.sh
> +++ b/ci/install-dependencies.sh
> @@ -40,6 +40,11 @@ osx-clang|osx-gcc)
> brew install git-lfs gettext
> brew link --force gettext
> brew install caskroom/cask/perforce
> + case "$jobname" in
> + osx-gcc)
> + brew link gcc@8
> + ;;
> + esac
> ;;
> StaticAnalysis)
> sudo apt-get -q update
> diff --git a/ci/lib-travisci.sh b/ci/lib-travisci.sh
> index 69dff4d1ec..a479613a57 100755
> --- a/ci/lib-travisci.sh
> +++ b/ci/lib-travisci.sh
> @@ -99,12 +99,14 @@ export DEFAULT_TEST_TARGET=prove
> export GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
> export GIT_TEST_OPTS="--verbose-log -x --immediate"
> export GIT_TEST_CLONE_2GB=YesPlease
> -if [ "$jobname" = linux-gcc ]; then
> - export CC=gcc-8
> -fi
>
> case "$jobname" in
> linux-clang|linux-gcc)
> + if [ "$jobname" = linux-gcc ]
> + then
> + export CC=gcc-8
> + fi
> +
> export GIT_TEST_HTTPD=YesPlease
>
> # The Linux build installs the defined dependency versions below.
> @@ -118,6 +120,11 @@ linux-clang|linux-gcc)
> export PATH="$GIT_LFS_PATH:$P4_PATH:$PATH"
> ;;
> osx-clang|osx-gcc)
> + if [ "$jobname" = osx-gcc ]
> + then
> + export CC=gcc-8
> + fi
> +
> # t9810 occasionally fails on Travis CI OS X
> # t9816 occasionally fails with "TAP out of sequence errors" on
> # Travis CI OS X
> @@ -127,3 +134,5 @@ GIT_TEST_GETTEXT_POISON)
> export GIT_TEST_GETTEXT_POISON=YesPlease
> ;;
> esac
> +
> +export MAKEFLAGS="CC=${CC:-cc}"
> --
> 2.20.1.151.gec613c4b75
>
>
